Faculty Directory

Das, Siddhartha

Das, Siddhartha

Assistant Professor
Mechanical Engineering
3163 Glenn L. Martin Hall, Bldg. 088
Website(s):


EDUCATION

 

  • Ph.D., Indian Institute of Technology, Kharagpur Department of Mechanical Engineering, 2010
  • B.Tech. (Hons.), Indian Institute of Technology, Kharagpur Department of Mechanical Engineering, 2005

 

BACKGROUND

 

Dr. Siddhartha Das joined the Department of Mechanical Engineering, University of Maryland, College Park in March, 2014. Dr. Das received his Ph.D. from the Indian Institute of Technology Kharagpur in 2010 in the area of theoretical microfluidics. Following his Ph.D., Dr. Das joined the Physics of Fluids Group in University of Twente, the Netherlands as a Postdoc and worked on surface nanobubbles, capillarity and soft wetting. After his stint in the Netherlands, Dr. Das went for his second Postdoc in the Department of Mechanical Engineering, University of Alberta, Canada. In Alberta, Dr. Das was honored with the Banting Postdoctoral Fellowship, the most prestigious postdoctoral fellowship of Canada.

Dr. Das' research interests span different areas of micro-nanoscale fluid mechanics and interactions of soft matter and complex interfaces with fluid mechanics. He is particularly interested in understanding issues such as the wetting of a soft solid, electrohydrodynamics past a soft interface, evaporation-mediated self-assembly of soft and rigid particles, mechanics of complex fluids during 3-D printing, interactions of liquid with 2-D materials like graphene and hexagonal Boron Nitride, micro-nanoscale water transport in trees, etc.

Dr. Das has authored nearly 90 journal publications, including publications in such prestigious journals as Proceedings of the National Academy of Sciences USA, Nature Communications, Advanced Materials, ACS Nano, Physical Review Letters, Physical Review E, Physics of Fluids, Soft Matter, Journal of Chemical Physics, Journal of Physical Chemistry, Journal of Applied Physics, and Scientific Reports.


 

HONORS AND AWARDS

 

  • Recognized as the Outstanding Reviewer for the journal International Journal of Non-linear Mechanics (2015)
  • Honoree in 8th Annual University-Wide Celebration of Scholarship and Research (University of Maryland, College Park) (2015)
  • Banting Postdoctoral Fellowship (2011-2012)
  • Emerald Engineering Outstanding Doctoral Research Awards
  • High Value Ph.D. Fellowship, Indian Institute of Technology, Kharagpur
  • National Doctoral Fellowship, All India Council of Technical Education (AICTE)
  • Indian National Academy of Engineering (INAE) Innovative Students Project Award (Undergraduate Level)
  • S.P. Sengupta Memorial Award, Indian Institute of Technology (IIT) Kharagpur, India

 

PROFESSIONAL MEMBERSHIPS

 

  • Editorial Board, Nature Scientific Reports, Fluids and Plasma Physics
  • Americal Physical Society (APS)

 

 

Soft Capillarity and Wetting; Soft Electrokinetics; Micro-nanoscale transport; Drops and Bubbles; Energy applications; Asphaltene; 3-D Printing; Water-2-D Material Interactions; Water transport in trees


(# Indicates the Graduate Students of Dr. Das in UMD; $ Indicates the Undergraduate Students or Summer Interns supervised by Dr. Das in UMD; * Indicates corresponding authorship)

 

2019

120. Y. Kuang, C. Chen, G. Chen#, Y. Pei, G. Pastel, C. Jia, J. Song, R. Mi, B. Yang, S. Das, L. Hu, “Bioinspired Solar-Heated Carbon Absorbent for Efficient Clean-Up of Highly Viscous Crude Oil.” Advanced Functional Materials (Accepted for Publication). (Topic: TW)

119. T. L1, X. Zhang, S. D. Lacey, R. Mi, X. Zhao, F. Jiang, J. Song, Z. Liu, G. Chen#, J. Dai, Y. Yao, S. Das, R. Yang, R. Briber, L. Hu, “Cellulose Ionic Conductors with High Differential Thermal Voltage for Low-Grade Heat Harvesting.” Nature Materials (Accepted for Publication). (Topic: TW)

118. H. Jing#, S. Sinha#, H. S. Sachar#, and S. Das*, “Interactions of Gold and Silica Nanoparticles with Plasma Membranes Get Distinguished by the van der Waals Forces: Implications for Drug Delivery, Imaging, and Theranostics.” Colloids and Surfaces B: Biointerfaces, DOI:10.1016/j.colsurfb.2019.01.062 (2019). (Topic: LBL)

117. H. Jing#, Y. Wang#, P. R. Desai#, K. S. Ramamurthi, and S. Das*, “Nanovesicles versus Nanoparticle-Supported Lipid Bilayers: Massive Differences in Bilayer Structures and in Diffusivities of Lipid Molecules and Nanoconfined Water.” Langmuir, DOI: 10.1021/acs.langmuir.8b03805 (2019). (Topic: LBL)

116. H. S. Sachar#, V. S. Sivasankar#, and S.Das*, “Revisiting the Strong Stretching Theory for pH-Responsive Polyelectrolyte Brushes: Effects of Consideration of Excluded Volume Interactions and an Expanded Form of the Mass Action Law.” Soft Matter, 15, 559-574 (2019) (Selected as the Back Cover Article). (Topic: P) (media coverage: eng.umd.edu; enme.umd.edu)

115. Y. Gu#, D. Park, D. Bowen, S. Das*, D. R. Hines*, “Direct Write Printed, Solid-Core Solenoid Inductors with Commercially Relevant Inductances.” Advanced Materials Technologies, 4, 1800312 (2019). (Topic: 3DP)

 

2018

114. C. Wang, S. Wang, G. Chen#, W. Kong, W. Ping, J. Dai, G. Pastel, H. Xie, S. He, S. Das, and L. Hu, “Flexible, Bio-Compatible Nanofluidic Sodium Ion Conductor.” Chemistry of Materials98, 7707-7713 (2018). (Topic: TW)

113. Y. Wang#, K. Ahuja#, S. Sinha#, P. R. Desai#, and S. Das*, “Water-Holey-Graphene Interactions: Route to Highly Enhanced Water-Accessible Graphene Surface Area.” ACS Applied Nano Materials1, 5907-5919 (2018). (Topic: W2D)

112. G. Chen#, J. Patwary#, H. S. Sachar#, and S. Das*, “Electrokinetics in nanochannels grafted with poly-zwitterionic brushes.” Microfluidics and Nanofluidics, 22, 122 (2018). (Topic: P)

111. Y. Wang#, S. Sinha#, P. R. Desai#, H. Jing#, and S. Das*, “Ion at air-water interface enhances capillary wave fluctuations: Energetics of ion adsorption.” Journal of the American Chemical Society140, 12853–12861 (2018). (Topic: INT) (media coverage: enme.umd.edu)

110. R. S. Maheedhara#, H. Jing#, H.  S. Sachar#, and S. Das*, “Highly enhanced liquid flows via thermoosmotic effects in soft and charged nanochannels.” Physical Chemistry Chemical Physics, 20, 24300-24316 (2018). (Topic: P)

109. P. R. Desai# and S. Das*, “Lubrication in polymer brush bilayers in weak interpenetration regime: Molecular dynamics simulations and scaling theories.” Physical Review E, 98, 022503 (2018). (Topic: P)

108. R. S. Maheedhara#, H. S. Sachar#, H. Jing#, and S. Das*, “Ionic Diffusoosmosis in Nanochannels Grafted with End-charged Polyelectrolyte Brushes.” The Journal of Physical Chemistry B122, 7450-7461 (2018). (Topic: P)

107. S. Karpitschka, S. Das, M. van Gorcum, H. Perrin, B. Andreotti, and J. H. Snoeijer, “Soft Wetting: Models based on energy dissipation or on force balance are equivalent.” Proceedings of the National Academy of Sciences, USA, DOI:   (2018). (Topic: OSM)

106. S. Sinha#, H. S. Sachar#, and S. Das*, “Electrostatically-motivated design of biomimetic nanoparticles: Promoting specific adhesion and preventing nonspecific adhesion simultaneously.” Applied Physics Letters, 112, 243702(1-5) (2018). (Topic: LBL)

105. Y. Wang#, S. Sinha#, K. Ahuja#, P. R. Desai#, J. Dai, L. Hu, and S. Das*, “Dynamics of a Water Nanodrop Through a Holey Graphene Matrix: Role of Surface Functionalization, Capillarity, and Applied Forcing.” The Journal of Physical Chemistry C, 122, 12243–12250 (2018). (Topic: W2D)

104. G. Chen#, H. S. Sachar#, and S. Das*, “Efficient Electrochemomechanical Energy Conversion in Nanochannels Grafted with End-charged Polyelectrolyte Brushes at Medium and High Salt Concentration.” Soft Matter, 14, 5246-5255 (2018). (Topic: P)

103. S. Sinha#, H. Jing#, H. S. Sachar#, S. Das*, “Surface charges promote non-specific nanoparticle adhesion to stiffer membranes.” Applied Physics Letters, 112, 163702(1-5) (2018).(media coverage: enme.umd.edu)(Topic: LBL)

102. G. Chen#, Y. Gu#, H. Tsang, D. R. Hines, and S. Das*, “The Effect of Droplet Sizes on Overspray in Aerosol-Jet Printing.” Advanced Engineering Materials, 201701084 (2018). (Selected as the Back Cover Article of the August 2018 issue of the journal). (Topic: 3DP)

101. H. Jing# and S. Das*, “Theory of diffusioosmosis in a charged nanochannel.” Physical Chemistry Chemical Physics, 20, 10204-10212 (2018). (Topic: FN)

100. P. R. Desai#, S. Sinha#, and S. Das*, “Polyelectrolyte Brush Bilayers in Weakly Interpenetration Regime: Scaling Theory and Molecular Dynamics Simulations.” Physical Review E, 97, 032503(1-8) (2018). (media coverage: eng.umd.edu; enme.umd.edu) (Topic: P)

 99. T. Li, H. Liu, X. Zhao, G. Chen#, J. Dai, G. Pastel, C. Jia, C. Chen, S. Das, R. Yang, and L. Hu, “Scalable and Highly Efficient Mesoporous Wood-Based Solar Steam Generation Device: Localized Heat, Rapid Water Transport”. Advanced Functional Materials, 28, 1707134 (2018). (Topic: TW)

98. S. Sinha#, H. S. Sachar#, and S. Das*, “Effect of plasma membrane semi-permeability in making the membrane electric double layer capacitances significant.” Langmuir34, 1760-1766 (2018). (Topic: LBL)

97. H. Jing# and S. Das*, “Electric Double Layer electrostatics of lipid-bilayer-encapsulated nanoparticles: Towards a better understanding of protocell electrostatics.” Electrophoresis, 39, 752-759 (2018). (Topic: LBL)

2017

96. S. Sinha#, H. Jing#, H. S. Sachar#, S. Das*, “Role of plasma membrane surface charges in dictating the feasibility of membrane-nanoparticle interactions.” Applied Physics Letters, 111, 263702 (2017). (Topic: LBL)

95. H. Liu, C. Chen, G. Chen#, Y. Kuang, X. Zhao, J. Song, C. Jia, X. Xu, E. Hitz, H. Xie, S. Wang, F. Jiang, T. Li, Y. Li, A. Gong, R. Yang, S. Das, and L. Hu, “High-Performance Solar Steam Device with Layered Channels: Artificial Tree with a Reversed Design.” Advanced Energy Materials (DOI: 10.1002/aenm.201701616) (2017). (Topic: TW)

94. C. Jia, Y. Li,  Z. Yang, G Chen#, Y. Yao, F. Jiang, Y. Kuang, G. Pastel, H. Xie, B. Yang, S. Das, and L. Hu, “Rich Mesostructures Derived from Natural Woods toward Energy-water Nexus.” Joule, 1, 588-5999 (2017). (Topic: TW)

93. Y. Wang#, S. Sinha#, L. Hu, and S. Das*, “Interaction between Water Drop and Holey Graphene: Retarded Imbibition and Generation of Novel Water-Graphene Wetting States.” Physical Chemistry Chemical Physics, 1927421-27434 (2017). (Topic: W2D)

92. M. Zhu$, Y. Li$, G. Chen#$, Z. Yang, X. Luo, Y. Wang#, J. Dai, S. D. Lacey, C. Wang, C. Jia, J. Wan, Y. Yao, B. Yang, Z. Yu, S. Das*, L. Hu*, “Tree-Inspired Design for High-Efficiency Water Extraction.” Advanced Materials, DOI: 10.1002/adma.201704107 (2017). ($: Co-first authors). (media coverage: cemag.us,laboratoryequipment.com, ScienceDaily) (Topic: TW)

91. Y. Gu#, D. R. Hines*, V. Yun, M. Antoniak, and S. Das*, “Aerosol-Jet Printed Fillets for Well-Formed Electrical Connections Between Different Leveled Surfaces.” Advanced Materials Technologies2, 1700178 (2017). (Topic: 3DP)

90. A. Pandey, S. Karpitschka, L. A. Lubbers, J. H. Weijs, L. Botto, S. Das, B. Andreotti, and J. H. Snoeijer, “Dynamical Theory of the Inverted Cheerios E ffect.” Soft Matter, 13, 6000-6010 (2017). (Topic: OSM)

89. S. Sinha#, H. Jing#, and S. Das*, “Positive zeta potential of a negatively-charged semi-permeable plasma membrane.” Applied Physics Letters111, 063702 (2017). (Topic: LBL)

88. Y. Gu#, D. Gutierrez, S. Das*, and D. Hines*, “Inkwells for On-Demand Deposition Rate Measurement in Aerosol-Jet Based 3D Printing.” Journal of Micromechanics and Microengineering, 27, 097001 (2017). (Topic: 3DP)

87. P. R. Desai#, S. Sinha#, and S. Das*, “Compression of polymer brushes in weak interpenetration regime: Scaling Theory and Molecular Dynamics Simulations.” Soft Matter13, 4159-4166 (2017). (Topic: P)

86. Y. Wang#, J. E. Andrews#, L. Hu, and S. Das*, “Drop Spreading on a Superhydrophobic Surface: Pinned Contact Line and Bending Liquid Surface.” Physical Chemistry Chemical Physics, 19, 14442-14452 (2017). (Topic: W2D)

85. J. E. Andrews#, Y. Wang#, S. Sinha#, P. W. Chung, and S. Das*, “Roughness-Induced Chemical Heterogeneity Leads to Large Hydrophobicity in Wetting-Translucent Nanostructures.” The Journal of Physical Chemistry C, 121, 10010-10017 (2017). (Topic: W2D)

84. F. Chen, A. Gong, M. Zhu, G. Chen#, S. Lacey, F. Feng, Y. Li, Y. Wang, J. Dai, Y. Yao, J. Song, B. Liu, K. Fu, S. Das, and L. Hu, “Mesoporous, Three-Dimensional Wood Membrane Decorated with Nanoparticles for Highly Efficient Water Treatment.”, ACS Nano11, 4275-4282 (2017).  (media coverage: IndiaToday, Business Standard, India; phys.org; woodworkingnetwork.com; Business Recorder; Science Daily; News Wise; enme.umd.edu; eng.umd.edu) Youtube Video. (Topic: TW)

83. S. Sinha#, H. Jing#, and S. Das*, “Charge Inversion and External Salt Effect in Semi-Permeable Membrane Electrostatics.” Journal of Membrane Science533, 364-377 (2017). (Topic: LBL)

82. G. Chen# and S. Das*, “Massively enhanced electroosmotic transport in nanochannels grafted with end-charged polyelectrolyte brushes.” The Journal of Physical Chemistry B, 121, 3130-3141 (2017). (Topic: P)

81. H. Jing#, S. Sinha#, and S. Das*, “Elasto-electro-capillarity: Drop equilibrium on a charged, elastic solid.” Soft Matter, 13, 554-566 (2017). (selected as the back cover article) (media coverage: enme.umd.edu; eng.umd.edu) (Topic: OSM)

80. G. Chen# and S. Das*, “Thermodynamics, electrostatics, and ionic current in nanochannels grafted with pH-responsive end-charged polyelectrolyte brushes.” Electrophoresis, 38, 720-729 (2017). (Topic: P)

79. Y. Wang, G. Sun, J. Dai, G. Chen#, J. Morgenstern, Y. Wang#, S. Kang, M. Zhu, S. Das, L. Cui, and L. Hu, “High-Performance, Low Tortuosity Wood Carbon Monolith Reactor.” Advanced Materials, 29, 1604257 (2017).(Topic: TW)

78. S. Sinha#, V. Padia#, K. I. Bae#, G. Chen#, and S. Das*, “Effect of electric double layer on electro-spreading dynamics of electrolyte drops” Colloids and Surfaces A: Physicochemical and Engineering Aspects514, 209-217 (2017). (Topic: OSM)

2016

77. M. Razi, S. Sinha#, P. R. Waghmare, S. Das*, and T. Thundat, “Effect of Steam-Assisted Gravity Drainage (SAGD) produced water properties on oil/water transient interfacial tension.” Energy and Fuels, 30, 10714-10720 (2016). (Topic: OSM)

76. H. Li#, G. Chen#, and S. Das*, “Electric double layer electrostatics of pH-responsive spherical polyelectrolyte brushes in the decoupled regime.” Colloids and Surfaces B: Biointerfaces147, 180-190 (2016). (Topic: P)

75. S. Sinha#, L. Myers#, and S. Das*, “Effect of solvent polarization on electroosmotic transport in a nanofluidic channel.” Microfluidics and Nanofluidics, 20, 119 (2016). (Topic: FN)

74. G. Chen# and S. Das*, “Anomalous shrinking-swelling of nano-confined end charged polyelectrolyte brushes: Interplay of confinement and electrostatic effects.” Journal of Physical Chemistry B, 120, 6848-6857 (2016). (Topic: P)

73. J. Andrews#, S. Sinha#, P. W. Chung, and S. Das*, “Wetting dynamics of a water nanodrop on graphene.” Physical Chemistry Chemical Physics, 18, 23482-23493 (2016). (Selected as the Inside Front Cover Article) (media coverage: enme.umd.edu) (Topic: W2D)

72. G. Chen#, H. Li#, and S. Das*, “Scaling relationships for spherical polymer brushes revisited.” Journal of Physical Chemistry B, 120, 5272-5277 (2016). (Topic: P)

71. S. Karpitschka, A. Pandey, L.A. Lubbers, J.H. Weijs, L. Botto, S. Das, B. Andreotti, and J.H. Snoeijer, “Inverted Cheerios eff ect: Liquid drops attract or repel by elasto-capillarity.” Proceedings of the National Academy of Sciences, USA, 113, 7403-7477 (2016) (media coverage: New York Times, Clarke School, phys.org, sciencedaily.com, utwente.nl, eurekalert.com, enme.umd.edu) youtube_movie (Topic: OSM)

70. Z. Liu, Y. Wang, K. Fu, Z. Wang, Y. Yao, J. Wan, J. Dai, S. Das*, and L. Hu, “Solvo-thermal microwave-powered two-dimensional materials exfoliation.” Chemical Communications, 52, 5757-5760 (2016). (Topic: OSM)

69. S. Sinha# and S. Das*, “Role of Shuttleworth effect in adhesion on elastic surfaces.” MRS Advances (DOI: 10.1557/adv.2016.218) (2016). (Topic: OSM)

68. Z. Liu, L. Zhang, R. Wang, S. Poyraz, J. Cook, M. Bozack, S. Das, X. Zhang, and L. Hu, “Ultrafast microwave nano-manufacturing of fullerene-like metal chalcogenides.” Scientific Reports, 6, 22503(1-8) (2016). (media coverage: enme.umd.edu) (Topic: OSM)

67. S. Sinha#, K. I. Bae#, and S. Das*, “Electric Double Layer effects in water separation from water-in-oil emulsions.” Colloids and Surfaces A: Physicochemical and Engineering Aspects489, 216-222 (2016). (Topic: OSM)

66. J. Patwary#, G. Chen#, and S. Das*, “Efficient electrochemomechanical energy conversion in nanochannels grafted with polyelectrolyte layers with pH-dependent charge density.” Microfluidics and Nanofluidics  20, 37 (2016). (Topic: P)

 

2015

65. S. Sinha# and S. Das*, “Under-water adhesion of rigid spheres on soft, charged surfaces.” Journal of Applied Physics, 118, 195306 (2015). (Topic: OSM)

64. G. Chen# and S. Das*, “Scaling laws and ionic current inversion in polyelectrolyte-grafted nanochannels.” Journal of Physical Chemistry B119, 12714-12726 (2015). (Topic: P)

63. J. Liu, R. Giakwad, A. Hande, S. Das, and T. Thundat, “Mapping and quantifying surface charges on clay nanoparticles.” Langmuir31, 10469-10476 (2015). (Topic: OSM)

62. S. Sinha#, K. A. Mahmoud, and S. Das*, “Conditions for spontaneous oil-water separation with oil-water separators.” RSC Advances5, 80184-80191 (2015). (Topic: OSM)

61. S. Das*, M. Banik, G. Chen#, S. Sinha#, and R. Mukherjee, “Polyelectrolyte brushes: Theory, modelling, synthesis, and applications.” Soft Matter, DOI: 10.1039/C5SM01962A (2015). (Topic: P)

60. M. Hassanpourfarda, Z. Nikakhtari, R. Ghosh, S. Das, T. Thundat, Y. Liu, and A. Kumar, “Bacterial floc mediated rapid streamer formation in creeping flows.” Scientific Reports 5, 13070(1-12) (2015). (media coverage: ualberta.ca) (Topic: OSM)

59. S. Karpitschka, S. Das, M. van Gorcum, H. Perrin, B. Andreotti and J.H. Snoeijer, “Droplets move over viscoelastic substrates by surfing a ridge.” Nature Communications 4, 7891(1-6) (2015). (media coverage: nanowerk.com; phys.org; enme.umd.edu; utwente.nl; (Topic: OSM)

58. J. Andrews# and S. Das*, “Effect of finite ion sizes in electric double layer mediated interaction force between two soft charged plates.” RSC Advances, 5, 46873-46880 (2015). (Topic: P)

57. G. Chen# and S. Das*, “Electroosmotic transport in polyelectrolyte-grafted nanochannels with pH-dependent charge density.” Journal of Applied Physics, 117, 185304 (2015). (Topic: P)

56. K. McDaniel#, F. Valcius#, J. Andrews#, and S. Das*, “Electrostatic potential distribution of a soft spherical particle with a charged core and pH dependent charge density”. Colloids and Surfaces B: Biointerfaces, 127, 143 (2015) (Selected as cover article for March issue of the journal). (media coverage: enme.umd.edu;) (Topic: P)

55. G. Chen# and S. Das*, “Streaming potential and electroviscous effects in soft nanochannels beyond Debye-Hückel linearization”, Journal of Colloid and Interface Science445, 357 (2015). (Topic: P)

54. R. Gaikwad, A. Hande, S. Das, S. K. Mitra, and T. Thundat, “Determination of charge on asphaltene nano-aggregates in air using electrostatic force microscopy”. Langmuir, 31, 679 (2015). (Topic: OSM)

53. G. Chen# and S. Das*, “Electrostatics of soft charged interfaces with pH-dependent charge density: Effect of consideration of appropriate hydrogen ion concentration distribution”. RSC Advances, 5, 4493 (2015). (Topic: P)

 

2014

52. S. Das and A. Kumar, “Formation and post-formation dynamics of bacterial biofilm streamers as highly viscous liquid jets”. Scientific Reports4, 7126 (2014). (media coverage: enme.umd.edu)

51. S. Das*, S. Chanda#, J. C. T. Eijkel, N. R. Tas, S. Chakraborty, and S. K. Mitra, “Filling of charged cylindrical capillaries”. Physical Review E, 90, 043011 (2014).

50. S. Das*, “Explicit interrelationship between Donnan and surface potentials and explicit quantification of capacitance of charged soft interfaces with pH-dependent charge density”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 462, 69 (2014).

49. S. Chanda#, S. Sinha, and S. Das*, “Streaming potential and electroviscous effects in soft nanochannels: Towards designing more efficient nanofluidic electrochemomechanical energy converter”, Soft Matter, 10, 7558 (2014).

48. L. A. Lubbers, J. H. Weijs, L. Botto, S. Das, B. Andreotti, and J. H. Snoeijer, “Drops on soft solids: Free energy and double transition of contact angles Journal of Fluid Mechanics 747, R1 (2014).

———— Publications Before Joining University of Maryland, College Park————

47. S. Das, T. Thundat, and S. K. Mitra, “Modeling of asphaltene transport and separation in presence of finite aggregation effects in combined electroosmotic-electrophoretic microchannel transport”, Colloids and Surfaces A: Physicochemical and Engineering Aspects 446, 23 (2014).

46. S. Chanda# and S. Das*, “Effect of finite ion sizes in an electrostatic potential distribution for a charged soft surface in contact with an electrolyte solution”, Physical Review E 89, 012307 (2014).

45. M. Mehranfar, R. Gaikwad, S. Das, S. K. Mitra, and T. Thundat, “Effect of temperature on morphologies of evaporation-triggered Asphaltene nanoaggregates” Langmuir 30, 800 (2014).

2013

44. S. Das, A. Guha, and S. K. Mitra, “Exploring new scaling regimes for streaming potential and electroviscous effects in a nanocapillary with overlapping Electric Double Layers”, Analytica Chimica Acta 808, 159 (2013).

43. S. Das* and S. K. Mitra, “Electric double-layer interactions in a wedge geometry: Change in contact angle for drops and bubbles”, Physical Review E 88, 033021 (2013).

42.  S. Das and S. K. Mitra, “Different regimes in vertical capillary filling”, Physical Review E 87, 063005 (2013).

41. P. R. Waghmare, S. Das, and S. K. Mitra, “Drop deposition on under-liquid low energy surfaces”, Soft Matter 9, 7437 (2013). (Selected as a Cover Article). (media coverage: phys.org; redorbit.com;, ualberta.ca;)

40. P. R. Waghmare, S. Das, and S. K. Mitra, “Under-water superoleophobic glass: Unexplored role of surfactant-rich solvent”, Scientific Reports 3, 1862 (2013). (media coverage: phys.orgredorbit.com)

 39. S. Das, S. Chakraborty, and S. K. Mitra, “Contribution of interfacial electrostriction in surface tension”, Journal of Colloid and Interface Science 400, 130 (2013).

38. R. P. Misra, S. Das, and S. K. Mitra, “Electric Double Layer force between charged surfaces: Effect of solvent polarization”, The Journal of Chemical Physics 138, 114703 (2013).

37. S. Das, T. Thundat, and S. K. Mitra, “Analytical model for zeta potential of asphalting”, Fuel 108, 543 (2013).

2012

36. S. Das, P. R. Waghmare, S. K. Mitra, “Early regimes of capillary filling”, Physical Review E 86, 067301 (2012).

35. S. Das, S. K. Mitra, and S. Chakraborty, “Ring stains in the presence of electromagnetohydrodynamic interactions”, Physical Review E 86, 056317 (2012).

34. A. Marchand, S. Das, J. H. Snoeijer, and B. Andreotti, “Contact Angles on a Soft Solid: From Young’s Law to Neumann’s Law”, Physical Review Letters 108, 094301 (2012).

33. S. Das, R. P. Misra, T. Thundat, S. Chakraborty, and S. K. Mitra,”Modeling of asphaltene transport and separation in presence of finite aggregation effects in pressure-driven microchannel flow”, Energy and Fuels 26, 5851 (2012).

32. S. Das, S. K. Mitra, and S. Chakraborty, “Wenzel and Cassie-Baxter states of an electrolytic drop on charged surfaces”, Physical Review E 86, 011603 (2012).

31. S. Das, P. R. Waghmare, M. Fan, N. S. K. Gunda, S. S. Roy, and S. K. Mitra, “Dynamics of liquid droplets in an evaporating drop: Liquid droplet “Coffee Stain” effect”, RSC Advances 2, 8390 (2012).

30. S. Das, S. Chakraborty, and S. K. Mitra, “Magnetohydrodynamics in narrow fluidic channels in presence of spatially non-uniform magnetic fields: Framework for combined magnetohydrodynamic and magnetophoretic particle transport”, Microfluidics and Nanofluidics, 13, 799 (2012).

29. S. Das, S. Chakraborty, and S. K. Mitra, “Redefining electrical double layer thickness in narrow confinements: Effect of solvent polarization”, Physical Review E 85, 051508 (2012).

28. S. Das, S. Chakraborty, and S. K. Mitra, “Ring stains in the presence of electrokinetic interactions”, Physical Review E, 85, 046311 (2012).

27. S. Das*, P. Dubsky, A. van den Berg, J. C. T. Eijkel, “Concentration polarization in translocation of DNA through nanopores and nanochannels”, Physical Review Letters 108, 138101 (2012).

26. A. Marchand, S. Das, J. H. Snoeijer, and B. Andreotti, “Capillary pressure and contact line force on a soft solid”, Physical Review Letters 108, 094301 (2012).

25. S. Das*, “Electric-double-layer potential distribution in multiple layer immiscible electrolytes: Effect of finite ion sizes”, Physical Review E 85, 012502 (2012).

2011

24. B. Andreotii, A. Marchand, S. Das, and J. H. Snoeijer, “Elastocapillary instability under partial wetting conditions: Bending versus buckling”, Physical Review E 84, 061601 (2011).

23. S. Das*, “Effect of added salt on preformed surface nanobubbles: A scaling estimate”, Physical Review E 84, 036303 (2011).

22. S. Das* and S. Hardt, “Electric-Double-Layer potential distribution in multiple-layer immiscible electrolytes”, Physical Review E 84, 022502 (2011).

21. S. Das, A. Marchand, B. Andreotti and J. H. Snoeijer, “Elastic deformation due to tangential capillary forces”, Physics of Fluids 23, 072005 (2011).

20. S. Das and S. Chakraborty, “Steric-effect-induced enhancement of electrical-double-layer overlapping phenomena”, Physical Review E 84, 012501 (2011).

19. S. Das*, “Effect of impurities in the description of surface nanobubbles: Role of non-idealities in the surface layer”, Physical Review E 83, 066315 (2011).

18. S. Das and S. Chakraborty, “Probing the solvation decay length for characterizing hydrophobicity-induced bead-bead attractive interactions in polymer chains”, Journal of Molecular Modeling 17, 1911 (2011).

2010

17. S. Das*, J. H. Snoeijer, and D. Lohse, “Effect of impurities in description of surface nanobubbles”, Physical Review E 82, 056310 (2010). (This paper has been selected for the November 15, 2010 issue of Virtual Journal of Nanoscale Science and Technology in the section “Surface and Interface Properties”)

16. S. Das and S. Chakraborty, “Effect of confinement on the collapsing mechanism of a flexible polymer chain”, The Journal of Chemical Physics 133, 174904 (2010). (This paper has been selected for the Novemeber 15, 2010 issue of Virtual Journal of Biological Physics Research in the section “Fundamental Polymer Statics/Dynamics”).

15. S. Das and S. Chakraborty, “Effect of conductivity variations within the Electric Double Layer on the streaming potential estimation in narrow fluidic confinements”, Langmuir 26, 11589 (2010).

14. S. Das and S. Chakraborty, “Transport of flexible molecules in narrow confinements”, International Journal of Micro-Nanoscale Transport Processes 1, 97 (2010) (Invited  Review).

13. S. Das and S. Chakraborty, “Augmented surface adsorption characteristics by employing patterned  microfluidic substrates in conjunction with transverse electric fields”, Microfluidics and Nanofluidics 8, 313 (2010).

2009

12. S. Das and S. Chakraborty, “Influence of streaming potential on the transport and separation of charged spherical solutes in nanochannels subjected to particle-wall interactions”, Langmuir 25, 9863 (2009).

11. T. Das, S. Das and S. Chakraborty, “Influences of streaming potential on cross stream migration of flexible polymer molecules in nanochannel flows”, The Journal of Chemical Physics 130, 244904 (2009).

2008

10. S. Das and S. Chakraborty, “Transport and separation of charged macromolecules under nonlinear electromigration in nanochannels”, Langmuir 24, 7704 (2008).

9. S. Chakraborty and S. Das, “Streaming field induced convective transport and its influence on the electroviscous effects in narrow fluidic confinements beyond the Debye Huckel limits”, Physical Review E 77, 037303 (2008).

8. R. Lambert, S. Das, M. Madou, S. Chakraborty and R. Rangel, “Simulation of a  moving mechanical actuator for fast biomolecular synthesis process”, International Journal of Heat and Mass Transfer 51, 4367 (2008).

7. S. Das and S. Chakraborty, “Separation of charged macromolecules in nanochannels within the continuum regime: Effects of wall interactions and hydrodynamic confinements”, Electrophoresis 29, 1115 (2008).

2007

6. S. Das, K. Subramanian, and S. Chakraborty, “Analytical investigations on the effects of substrate kinetics on macromolecular transport and hybridization through microfluidic channels”, Colloids and Surfaces B58, 203 (2007).

5. S. Das and S. Chakraborty, “Transverse electrodes for improved DNA hybridization in microchannels”, AIChE Journal, 53, 1086 (2007).

2006

4. S. Das and S. Chakraborty, “Augmentation of macromolecular adsorption rate through transverse electric fields generated across patterned walls of a microfluidic channel”, Journal of Applied Physics 99, 1 (2006). (This paper has been selected for the July 15, 2006 issue of Virtual Journal of Biological Physics Research in the section “Instrumentation Development).

3. S. Das and S. Chakraborty, “Analytical solutions for velocity, temperature and concentration distribution in electroosmotic microchannel flows of a non-Newtonian bio-fluid”, Analytica Chimica Acta 559, 15 (2006).

2. S. Das, T. Das, and S. Chakraborty, “Analytical solutions for the rate of DNA hybridization in a microchannel in the presence of pressure-driven and electro-osmotic flows”, Sensors and Actuators B114, 957 (2006).

1. S. Das, T. Das and S. Chakraborty, “Modeling of coupled momentum, heat and solute Transport during DNA hybridization in a microchannel in presence of electro-osmotic effects and axial pressure gradients”, Microfluidics and Nanofluidics 2, 37 (2006).

Wood-based Technology Creates Electricity from Heat

Briber, Das and Hu make novel heat-conversion membrane

Clark School Research Featured on Back Cover of Soft Matter

The study provides the most complete strong stretching theory model to describe the thermodynamics of PE brushes.

Eight mechanical engineering students accepted to Future Faculty Program

The program prepares students to achieve career-long success in academia as educators and researchers.

Desai and Kaushik Receive STLE Fellowship 

Graduate students awarded the 2018 Society of Tribologists and Engineers Fellowship.
 

Findings Published on Ion Adsorption Energetics

UMD researchers shed light on the principles dictating ion adsorption at the air-water interface.

ME Researchers Develop Methods to Mediate Nanoparticle Adhesion

Research has the potential to improve drug delivery to stiffened cells.

New Research on Polyelectrolyte Brush Bilayers Published in PRE

Paper establishes formation of interdigitated polyelectrolytes brush bilayers even for weak interdigitation.

Five Mechanical Engineering Graduate Students Named Future Faculty Fellows

Clark School program prepares graduate students for future academic career.

UMD Researchers Discover Methods to Mediate Membrane-Nanoparticle Interactions

Findings examine the role of electrostatics in regulating interactions between nanoparticle and plasma (cell) - membrane.

Graduate Student Panelist at International Student Event

Ph.D. candidate Shayandev Sinha was a featured panelist at UMD Graduate School International Students Event.

UMD Researchers Explore Possibility of Making a Biological Cell Membrane Positive

Professor Siddhartha Das and graduate students shed light on possibility of making the plasma membrane of a biological cell positive.

ME Faculty Part of NextFlex Award Winning Team

UMD faculty part of team to explore conformal sensors, 3-D antenna structures and non-planar circuit routing demonstrators.

Wood filter removes toxic dye from water

Hu, Das flow water through wood in new use of natural materials

Spotlight on NAVAIR-Funded Research at Maryland

Cooperative agreement between UMD and NAWCAD helps support research projects in Mechanical Engineering.

Graduate Students Selected as Future Faculty Fellows

Seven graduate students were chosen as Clark School Future Faculty Fellows this year.

UMD Research Makes Back Cover Soft Matter

Research sheds light on behavior of liquid drops on soft and charged elastic surfaces.

Das Named Editorial Board Member of Nature's Scientific Reports

Das to serve on editorial board for Scientific Reports, Fluids and Plasma Physics category.

Gemstone Team Mentored by Das Wins UMD Sustainability Grant

Department of Mechanical Engineering Assistant Professor Siddhartha Das mentors grant winning Team BACTERIA.

Exploration of Graphene's Wetting Dynamics Could Open New Possibilities in Fluid Mechanics of Two-Dimensional Materials

New research could expand understanding of water/graphene interactions to open new possibilities in area of fluid mechanics of two-dimensional materials.

Physics for Breakfast: Clark School Research in The New York Times

Research coauthored by Mechanical Engineering Assistant Professor Siddhartha Das is profiled in The New York Times.

Drop-Drop Interactions on Soft Materials Unravel “Cheerios-Like” Behavior of Liquid Drops

Assistant Professor Siddhartha Das part of international team publishing new research in Proceedings of the National Academy of Sciences.

Mechanical Engineering Graduate Student Volunteers during STEM Events

Ph.D. student Shayandev Sinha volunteered at E-Week 2016 and DC STEM Fair 2016.

Five Mechanical Engineering Graduate Students Selected for Clark School Future Faculty Program

Graduate students selected for program designed to produce next great engineering professors.

Surface Physics driven Nanomanufacturing opens up new possibilities of synthesizing Metal Chalcogenides Nanostructures

Assistant Professor Siddhartha Das publishes joint research outlining new method to synthesize Metal Chalcogenides Nanostructures.

Mechanical Engineering Student Appointed to ASME-IPTI Collegiate Council

Ph.D. student Shayandev Sinha selected for 2015-2016 ASME-IPTI Collegiate Council.

Chen Awarded Northrop Grumman Graduate Fellowship in Engineering Education

Graduate student Guang Chen selected for a 2015-2016 Northrop Grumman fellowship.

Surfing Liquid Drops Shed New Light in Soft Materials Research

New work published in Nature Communications could improve applications from cancer therapies and contact lenses to 3-D printing and mayonnaise.

Das leads UMD undergraduate research team to publish cover article in Colloids and Surfaces B: Biointerfaces

Research provides new insights on effects of electrostatic charge & pH on virus biophysics and virus/bacteria interactions.

Das publishes work on microfluidic bacterial biofilm streamer formation in Scientific Reports

New research investigates formation of filamentous structure—streamers—in microfluidic transport.