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Siddhartha Das
Assistant Professor
Dept. of Mechanical Engineering
University of Maryland, College Park

2181 Glenn L. Martin Hall
301-405-6633
sidd@umd.edu

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 with fluid mechanics. He is particularly interested in understanding issues such as the wetting of a soft solid, electrohydrodynamics past a soft interface, and evaporation-mediated self assembly of soft and rigid particles.

Dr. Das has authored more than 75 journal publications, including publications in such prestigious journals as Advanced MaterialsProceedings of the National Academy of Sciences USA, Nature Communications, Physical Review LettersPhysical Review E, Journal of Fluid Mechanics, Physics of Fluids, Langmuir, Soft MatterJournal of Chemical Physics, Journal of Applied PhysicsPhysical Chemistry Chemical PhysicsChemical Communications, and Scientific Reports.

Affiliate Appointments

SMIEL Group (Fall, 2016)

Parth, Guang, Joseph, Siddhartha, Shayandev, Yanbin, Haoyuan

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Postdoctoral Researchers

Guang

1. Guang Chen (Started on Spring 2017)

Dr. Guang Chen received her PhD in Mechanical Engineering from University of Maryland, College Park working with Prof. Siddhartha Das. Her thesis was on Thermodynamics, Electrostatics, and Transport of Nanoconfined Polyelectrolyte Brushes. She completed her PhD in just 28 months with a most prolific record of 12 journal publications. Prior to her PhD she completed her B.S. in Mechanical Engineering and B.A. in advertising from Shanghai Jiao Tong University (2012) and M.S. in Mechanical Engineering from Columbia University (2014). Her postdoctoral research at SMIEL focuses on developing fluid dynamics and liquid-structure interaction models for probing the 3-D printing process.

Awards and Recognition in SMIEL

1. Selected for UMD’s A. James Clark School’s Future Faculty Program 2016.  (December, 2015).

2. Recipient of the 2015-16 Northrop Grumman Graduate Fellowship in Engineering Education (November, 2015).

3. Selected as a finalist in the Clean Energy Education & Empowerment (C3E) Women in Clean Energy symposium (October, 2015).

Publications in SMIEL

1. G. Chen# and S. Das*, “Thermodynamics, electrostatics, and ionic current in nanochannels grafted with pH-responsive end-charged polyelectrolyte brushes.” Electrophoresis (DOI: 10.1002/elps.201600415).

2. 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 (DOI: 10.1002/adma.201604257).

3. 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).

4. 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).

5. 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.

6. G. Chen#, H. Li#, and S. Das*, “Scaling relationships for spherical polymer brushes revisited.” Journal of Physical Chemistry B (DOI: 10.1021/acs.jpcb.6b01609).

7. 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).

8. G. Chen# and S. Das*, “Scaling laws and ionic current inversion in polyelectrolyte-grafted nanochannels.” Journal of Physical Chemistry B, 119, 12714-12726 (2015).

9. S. Das*, M. Banik, G. Chen#, S. Sinha#, and R. Mukherjee, “Polyelectrolyte brushes: Theory, modelling, synthesis, and applications.” Soft Matter11, 8580-8583 (2015).

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

11. 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).

12. 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 Advances5, 4493 (2015).

 

2. Yuan Gu (Started on Fall, 2016)

yuan_gu

Yuan Gu received his B.S. in in Metallurgy Engineer from University of Science and Technology Beijing (2009) and M.S. in Physical Chemistry of Metallurgy from General Research Institute for Nonferrous Metals (2012) in China. He then moved to United States to get his Ph.D. in Materials Science and Engineering from New Jersey Institute of Technology (2016).

His Master’s research focused on the solid state method to synthesize cathode materials for lithium ion batteries. His Ph.D. research was in the area of synthesis of conductive inks for inkjet printing, printable sensors and flexible batteries. His Ph.D. dissertation was ‘Application of Inkjet Printing Technology to Flexible Batteries’ under the guidance of Prof. John Federici. During his Ph.D. he received a Graduate Student Award from the New Jersey Inventors Hall of Fame (NJIHoF). He joined in SMIEL in 2016 and focused on printing electronics on curved surfaces with various kinds of printing methods and inks. He is co-advised by Prof. Abhijit Dasgupta of Mechanical Engineering.

PhD Students

webwxgetmsgimg1. Haoyuan Jing (Started on Spring, 2017)

Hoayuan has been an MS student in SMIEL group led by Prof. Siddhartha Das from Fall, 2015. On spring 2017, he transferred to the PhD  under the supervision of Prof. Siddhartha Das. Prior to joining SMIEL, Haoyuan Jing received his Bachelor’s degree in Mechanical Engineering from Xi’an Jiaotong University in Sprig 2015. Haoyuan’s current research IN SMIEL are on (a) 3-D prining of composites and (b) Surface charge effects on soft materials.

Publications in SMIEL

1. H. Jing#, S. Sinha#, and S. Das*, “Elasto-electro-capillarity: Drop equilibrium on a charged, elastic solid.” Soft Matter (DOI: 10.1039/C6SM02463G).

_20150825_2033132. Parth Desai (Started on Spring, 2017)

Parth has been an MS student in SMIEL group led by Prof. Siddhartha Das from Fall, 2015. On spring 2017, he transferred to the PhD working under the joint supervision of Prof. Siddhartha Das and and Dr. Keir Neuman (NHLBI, NIH). Parth’s current research is on DNA supercoiling and is supported by the UMD-NHLBI Graduate Partnership Program.

 

Yanbin3. Yanbin Wang (Started on Fall, 2016)

Yanbin received his MS in Materials Science and Engineering, UMD in 2016. His research will be nanoscale mechanics and materials. He will be co-advised by Prof. Liangbing Hu of Materials Science and Engineering, UMD.

 

 

4. Shayandev Sinha (Started on Spring 2015)

Shayandev Sinha receShayandev Sinhaived his B.Tech-M.Tech Dual Degree from IIT Kanpur in 2014. His research in SMIEL involves wetting on soft charged surfaces and Molecular Simulations of Electrokinetics of polyelectrolyte-grafted systems.

Awards and Recognition in SMIEL

1. Selected for the Outstanding Graduate Assistant Award for 2016 offered by the Graduate School, University of Maryland (April, 2016).

2. Received the Kulkarni Graduate Student Summer Research Fellowship for Summer 2016 offered by the Graduate School, University of Maryland (April, 2016).

3. Recognized by ASME for taking part in Family Day in Washington DC (February, 2016) (Link).

4. Chosen for the ASME’s International Petroleum Technology Institute Collegiate Council (December, 2015).

Publications in SMIEL

1. H. Jing#, S. Sinha#, and S. Das*, “Elasto-electro-capillarity: Drop equilibrium on a charged, elastic solid.” Soft Matter (DOI: 10.1039/C6SM02463G).

2. 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).

3. 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).

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

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

6. 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)

7. 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).

8. S. Sinha# and S. Das*, “Under-water adhesion of rigid spheres on soft, charged surfaces.” Journal of Applied Physics118, 195306 (2015).

9. S. Sinha#, K. A. Mahmoud, and S. Das*, “Conditions for spontaneous oil-water separation with oil-water separators.” RSC Advances, DOI: 10.1039/C5RA16096K (2015).

10. S. Das*, M. Banik, G. Chen#, S. Sinha#, and R. Mukherjee, “Polyelectrolyte brushes: Theory, modelling, synthesis, and applications.” Soft Matter11, 8580-8583 (2015).

MS/MEng Students

1. Harnoor Singh (Started on Fall 2017)

Harnoor received his undergraduate degree in Mechanical Engineering in 2017 from BITS Pilani, K.K. Birla Goa Campus. His research in SMIEL will focus on developing Molecular Dynamics models for lipid bilayers and continuum theories on different areas of charged soft matter mechanics.

2. Kunal Ahuja (Sterted on Fall 2017)

Kunal received his undergraduate degree in Mechanical Engineering in 2015 from NIT, Surat (India). His research in SMIEL will focus on developing Molecular Dynamics models for polymers and 2-D material-water interactions.

3. Raja Maheedhara (Started on Spring 2017)

Raja received his Bachelors and Masters in technology (Dual Degree) in Mechanical Engineering from IIT Madras in 2014, specializing in Energy Technology. His research in SMIEL will focus on CFD modeling and simulation of 3-D printing.

 

 

4. Jahin Patwary (Started on Fall 2014)

Jahin Patwary received his Bachelor’s degree in Mechanical Engineering from UMBC (University of Maryland: Baltimore County) in Spring 2014. He was a Meyerhoff Scholar at UMBC and has entered UMD as an LSAMP Bridge to the Doctorate fellow. His current research in SMIEL focuses on electroosmosis (streaming potential and electroviscous effects) with pH dependent charge density in a soft nanochannel.

Publications in SMIEL

1. 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).

Undergraduate Students
  1. TEAM BACETRIA (GEMSTONE TEAM)

Alumni

PhD Students

Guang

1. Guang Chen (August, 2015 — January, 2017)

Thesis title: NANOCONFINED POLYELECTROLYTE BRUSHES: THERMODYNAMICS, ELECTROSTATICS AND TRANSPORT

Current Position: Postdoc, SMIEL, UMD

 

 

MS Students

Jospeh_Photo1. Joseph Andrews (August, 2015 — August, 2016)

Co-Advisor: Peter W. Chung

Thesis title: WETTING OF GRAPHENE

Current Position: Industry

Publications in SMIEL

1. J. Andrews#, S. Sinha#, P. W. Chung, and S. Das*, “Wetting dynamics of a water nanodrop on graphene.” Physical Chemistry Chemical Physics (DOI: 10.1039/C6CP01936F ).

 

Undergraduates

1. Vineet Padia (Fall, 2015 — Spring, 2016)

Publications in SMIEL

1. 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 Aspects (DOI: 10.1016/j.colsurfa.2016.11.031).

 

2. Lucas Myers (Spring, 2015 — Fall, 2016)

Publications in SMIEL

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

 

Jospeh_Photo

3. Joseph Andrews (Fall, 2014 — Summer, 2015)

Publications in SMIEL

1. 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: Biointerfaces127, 143 (2015).

2. 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).

 

Kyle_Pic

 4. Kyle McDaniel  (Summer 2014 — Spring 2015)

Publications in SMIEL

1. 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: Biointerfaces127, 143 (2015).

 

5. Fedra Valcius (Summer Intern; June-July, 2014)

Publications in SMIEL

1. 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: Biointerfaces127, 143 (2015).

Lunch with the Summer Interns (Summer, 2014)