Curriculum Vitae

Dr. Pritam Kumar Roy• Father Name : Nirendra Nath Roy• Date of Birth : 06-11-1988• Nationality : Indian• Gender : Male• Marital Status : Single• Languages Known : Bengali, English, Hindi• Permanent Address : Village - Gomostapara

Post Office- JalpaiguriPin Code - 735101District - Jalpaiguri, West bengal, Indiae-mail: roypritam256@gmail.comMobile: +91-9794136644

• Present Address : Ariel University, IsraelInstitute DormitoryPin Code - 40700Ariel City, Israele-mail: roypritam256@gmail.comMobile: +972-559559139

Research interests

• Experimental soft condense matter physics

• Surface and interface science

• Smart surfaces with tunable wetting properties

• Wrinkle fabrication

• Superhydrophobic and superoleophobic surface

• Slippery liquid infused porous surface (SLIPS)

• Different applications of slippery liquid infused porous surface

• Electric and magnetic field induced slippery surface

• Electrowetting actuated microfluidics applications

Education

Postdoc (2nd July 2019-present)Department of Chemical Engineering,Ariel University, Israel

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PhD in Physics (2013-2019)Department of Physics,Indian Institute of Technology, Kanpur, India

M.Sc. in Physics (2010-13)Indian Institute of Technology Kanpur,Kanpur, Utter Pradesh, India

B.Sc. in Physics (2007-10)North Bengal University,Raja Rammohanpur, Darjeeling, West Bengal, India,

Research statement

For various application wettability of a surface need to be modified. In recent days, smart materials withtunable wetting properties have attracted massive attention from industry as well as fundamental science.Wettability or contact angle on a solid surface can be manipulated by any of the following two methods.(i) Passive method where surface energy of a solid is changed using an appropriate coating. (ii) Activemethod where an appropriate material is used which responds to an external stimulus e.g. electric field,temperature, pH, UV light, mechanical strain etc., resulting in the change of the surface wettability. Theseexternal stimuli act on the surface and change either surface energy or surface roughness or both and ma-nipulate the wettability of the surface. My thesis involves understanding and fabrication of one-dimensionallinear wrinkle patterns and its applications in various surface phenomena including superhydrophobicity,superoleophobicity and lubricant infused slippery surface.

One-dimensional wrinkle patterns were fabricated using elastic polymeric material polydimethylsiloxanecommonly known as PDMS using buckling instability. Due to elastic nature of PDMS, the surface topog-raphy of wrinkles could be varied with external strain. Since hierarchical roughness is required to show asuperhydrophobic behavior, micron-sized wrinkles were combined with nanoscale roughness which enabledus to demonstrate mechanically tunable superhydrophobic surfaces. Since a single phase PDMS materialwas used, the tunable superhydrophobic surfaces showed excellent durability and stability against physicaland chemical wear and tear. Subsequently, I worked on combining superhydrophobic, superoleophobicand slippery phenomena on a common surface. Using copper oxide nanostructures on metal surfaces, withsuitable surface engineering, enabled me to demonstrate the combined phenomena. Combining the tun-able wrinkle pattern with lubricating fluid infused slippery phenomena provided a novel route to preparemechanically tunable slippery surfaces. Height of the lubricating fluid on a wrinkled surface could be ma-nipulated with strain hence its slippery behavior as well. Fully stretched wrinkle samples show almostsmooth surface topography hence show a uniform thickness of the lubricating fluid. Whereas completelyrelaxed wrinkles show full topography with maximum amplitude and the coated lubricating fluid also fol-lows the topography. Since the amplitude of the wrinkles can be controlled upon applied strain, hencethe thickness of the lubricating oil layer also depends upon the applied strain. Later on, some importantfundamental aspects of lubricating fluid coated slippery surfaces, such as apparent contact angle, wettingridge formation and its dependence on lubricating film thickness, cloaking behavior was investigated.

Apart from these works, I am interested in learning new things and working on different areas of surfaceand interface science and its applications.

List of publications

1. Mechanically Tunable Slippery Behavior on Soft Poly(dimethylsiloxane)-Based Anisotropic WrinklesInfused with Lubricating FluidPritam Kumar Roy, Reeta Pant, Arun Kumar Nagarajan and Krishnacharya Khare, Langmuir, 32, 5738

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(2016);. PDF

2. Uniting Superhydrophobic, Superoleophobic and Lubricant Infused Slippery Behavior on Copper OxideNano-structured SubstratesPritam Kumar Roy, Sanjeev Kumar Ujjain, Sumana Kumar, Subhash Singha and Krishnacharya Khare,Sci. Rep., 6, 35524 (2016);. PDF

3. Slipperiness and stability of hydrophilic surfaces coated with a lubricating fluidReeta Pant, Pritam Kumar Roy, Arun Kumar Nagarajan and Krishnacharya Khare, RSC Adv., 6, 15002(2016);. PDF

4. Tunable Superoleophobicity via Harnessing the Surface Chemistry of UV Responsive Titania CoatingsJitesh Barman, Sumit Kumar Majumder, Pritam Kumar Roy, and Krishnacharya Khare, RSC Adv.,8,13253-13258 (2018);. PDF

5. Sink Dynamics of Aqueous Drops on Lubricating Fluid Coated Hydrophilic SurfacesMeenaxi Sharma, Pritam Kumar Roy, Reeta Pant and Krishnacharya Khare, Colloids Surf. A,562,377-382 (2019);. PDF

6. Mobility of Aqueous and Binary Mixture Drops on Lubricating Fluid- Coated Slippery SurfacesMeenaxi Sharma, Pritam Kumar Roy, Jitesh Barman and Krishnacharya Khare, Langmuir,35, 7672-7679 (2019);. PDF

7. Mechanically Tunable Single Component Soft Polydimethylsiloxane (PDMS) Based Robust and StickySuperhydrophobic SurfacesPritam Kumar Roy, Sanjeev Kumar Ujjain, Sneha Dattatreya, Sumana Kumar, Reeta Pant and Krish-nacharya KhareAccepted in Applied Physics A - Springer.

Conferences

• European Materials Research Society (E-MRS) Spring Meeting 2018, June 18-22, 2018, held at Stras-bourg, France,→ Poster Presented on “Isotropic and Anisotropic Surface Morphology Controlled Wetting andSlippery Phenomena”.

• Recent Trends in Condensed Matter Physics, October 31 - November 3, 2017, held at Bose Institute, India→ Poster presentation on “Surface Morphology Controlled Wetting and Slippery Phenomena”.

• Complex Fluids- CompFlu-2016, January 2-4, 2016, held at IISER Pune, India,→ Poster Presented on “Mechanical tunablity of superhydrophobicity and slippery behavior onPDMS based wrinkles”.

• 8th India Singapore Symposium in Condensed Matter Physics, February 25-27, 2015, held at IIT Kanpur,India,→ Poster Presented on “Mechanically tunable superhydrophobic and slippery surface based onPDMS wrinkles ”.

• A cluster of topical meetings on Current Trends in Condensed Matter Physics, February 19-22, 2015, heldin NISER Bhubaneswar, India,→ Oral presented on “Mechanical tunablity of superhydrophobicity and slippery behavior onPDMS based wrinkles”.

Teaching Experience

• Graduate teaching assistant in Physics 101 Lab, IIT Kanpur, July 2013 - December 2014 .Taught 3-hour laboratory sessions, once a week to first-year undergraduate students of B.Tech andintegrated M.Sc.Experiments taught: Prism spectrometry, Current balance, coupled pendulum.

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• Graduate teaching assistant in Physics 441, IIT Kanpur, July 2015- December 2015Taught 4-hour laboratory sessions, once a week to first-year M.Sc students.Experiments taught: Analog electronics, Digital electronics, Micro-controller.

• Graduate teaching assistant in Physics 103 course, IIT Kanpur, January 2015- May 2015

• Graduate teaching assistant in Goniometer, Soft Matter Lab, IIT Kanpur, July 2016- July 2018Worked as an Operator.

Accolades

• Qualified JAM 2010, National Level examination for Joint admission to M.Sc. in IITs.

• Awarded Department excellence grant June (2018).

Experimental skils

• Experimental technique : Expert on wrinkle fabrication, Fabrication of Superhydrophobic, Super-oleophobic and Lubricant infused slippery surfaces, Photo-lithography technique, electrowetting ondielectric (EWOD), electro-chemical etching, clean room facility.

• Characterizations : Contact angle goniometer: contact angle measurement, surface tension mea-surement, interfacial tension measurement of combination of various liquid phases, surface energymeasure- ment of different surfaces using various techniques, characterization of lubricating fluid in-fused slippery surfaces: measurement of slip velocity and contact angle hysteresis

• Machine operated : Goniometer OCA-35, Optical Microscope, Spin, dip and spray coater.

• Machine used : Optical Microscope, FE-SEM, AFM, Optical Profilometer .

Computer skils

• Numerical computing : Matlab.

• Data plotting software : Origin.

• Image analysis software : Image j, Gwyddion, CorelDRAW, Photoshop.

• Symbolic computation : Mathematica.

• Programing languages : Have basic knowledge in C, C++, Python.

• Documentation : LATEX, Microsoft Office.

Non-academic pursuits

• Hobbies: Playing Violin, Playing Football, Running, Cricket, Badminton, Watching Movies.

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