Shivam Gupta

I am interested in studying the morphology of the lubricant coated slippery systems (inspired by Nepenthes pitcher plants) when an external fluid in the form of drop comes in contact with them.

The studies involve exploring the dynamics of the lubricating film and the equilibrium/ quasi-equilibrium interfacial profiles by employing the following experimental and numerical techniques:

interfacial tension / contact angle measurements via Contact Angle Goniometry
Chemical modification of the solid surfaces via grafting and photolithography techniques
Microscopy: Optical, Fluorescence, Dual Wavelength Reflection Interference Contrast Microscopy (DW-RICM)
Numerically solving the involved partial differential equations (PDEs)
Quasi-static interfacial profile and pressure calculations via Surface Evolver simulations

Surface Evolver simulation of a water drop on a chemically patterned surface

Surface Evolver simulation of a water drop on a lubricated surface

Graphical abstract of our Soft Matter Publication (click on the image to view the publication)

Side view of a glycerol drop on a lubricated surface

A water drop on a chemically patterned surface

Pendant drops to calculate the interfacial tensions

Interferometry image for an unstable lubricant film

Optical microscopy image of a dewetted lubricant

An inhouse thickness measurement setup employing an inverting microscope and a spectrometer

Configuration of a lubricant under a water drop determined by (a) Surface Evolver simulation and (b ) fluorescence confocal microscopy.

Dynamic lubricant thickness measurement using dual wavelength reflection interference contrast microscopy (DW-RICM) :

absolute lubricant profile beneath water drop found from the interferometry images captured using a confocal microscope in reflection mode

Graphical abstract of our recent arXiv preprint (click on the image to view the preprint)

Publications:

• M. Sharma, B. Bhatt, S. Gupta, R. Pant, & K. Khare (2020). Static and Dynamic Behaviour of Aqueous Drops on Thin Lubricating Fluid-Coated Slippery (LCS) Surfaces. Bulletin of Materials Science, 43(1), 1-7.

• M. Sharma, S. Gupta, B. Bhatt, G. Bhatt, S. Bhattacharya, & K. Khare (2021). Anisotropic Motion of Aqueous Drops on Lubricated Chemically Heterogeneous Slippery Surfaces. Advanced Materials Interfaces, 8(5), 2001916.

• B. Bhatt, S. Gupta, M. Sharma, & K. Khare (2022). Dewetting of Non-Polar Thin Lubricating Films Underneath Polar Liquid Drops on Slippery Surfaces. Journal of Colloid and Interface Science, 607, 530-537.

• B. Bhatt, S. Gupta, V. Sumathi, S. Chandran & K. Khare (2022). Electric Field Driven Reversible Spinodal Dewetting of Thin Liquid Films on Slippery Surfaces. Advanced Materials Interfaces, 10(8), 2202063.

• S. Gupta, B. Bhatt, M. Sharma, & K. Khare (2023). Numerical and Experimental Investigation of Static Wetting Morphologies of Aqueous Drops on Lubricated Slippery Surfaces Using a Quasi-Static Approach. Soft Matter, 19(6), 1164-1173.

• C. Majhi, B. Bhatt, S. Gupta, & K. Khare (2023). Effect of externally deposited nanoscale heterogeneities in thin polymer films on their adhesion behavior. arXiv preprint arXiv:2301.01627.

• S. Gupta, B. Bhatt, Z. Dai, & K. Khare (2025): Dynamics of Thin Lubricant Films upon Liquid Contact on Slippery Surfaces. arXiv preprint arXiv:2505.00640 (2025).

Research Group:

I am doing my research work under Prof. Krishnacharya. To know more about me and my lab group, please visit:

https://www.krishnacharya.com/

https://scholar.google.com/citations?user=-8J6omMAAAAJ&hl=en&oi=sra

https://orcid.org/0000-0003-0723-0418

https://www.researchgate.net/lab/Krishnacharya-Khare-Lab

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