1. C. M. Ragisha, N. M. Habeeb, V. L. Grace, and Subramanyan Namboodiri Varanakkottu*, Moving Meniscus-Assisted Template-Free Optothermofluidic Nanoparticle Patterning and Its Application in Optothermoconvective Particle Trapping, Langmuir 40 (23), 12276–12287, 2024. *Corresponding author
2. S. Gupta, Subramanyan Namboodiri Varanakkottu, E. Mani, and D. K. Satapathy, Contact Angle Modulation: In Situ Polymer Deposition during Sessile Drop Evaporation. Langmuir, 40 (24), 12594–12601 (2024)
3. B. S. Lekshmi, A. P. Joseph, and Subramanyan Namboodiri Varanakkottu*, Exploiting droplet impact-driven flows and jetting to guide and extract particles from particle-laden droplets, Physics of Fluids, 36 (1), p. 012014, 2024. *Corresponding author
4. Soorya S. Raja, Romina Marie Mathewa, Deljo Davisa, Varanakkottu S. N., Asha Srinivasan and Vinod T. P., Facile fabrication of stable wettability gradients on elastomeric surfaces for applications in water collection and controlled cell adhesion, Soft Matter 19 (29), 5560-5574, 2023.
5. Farzeena Chalikkara, Vinay TV, BS Lekshmi, Ragisha CM and Subramanyan Namboodiri Varanakkottu*, Innovations in Exploiting Photo-controlled Marangoni Flows for Soft Matter Actuations, Soft Matter, 19, 5223-5243, 2023.  Invited Perspective article, Selected as the Cover Image (*Corresponding author)
6. Lekshmi, Bindhu Sunilkumar and Subramanyan Namboodiri Varanakkottu*, Janus Liquid Marbles - Fabrication Techniques, Recent Developments and Applications, Droplet Wiley, 2, e44, 2023. Invited review article, *Corresponding author
7. Puthiyottil, Nesleena, Ananya Palamparambil, Subin Kaladi Chondath, Subramanyan Namboodiri Varanakkottu, and Mini Mol Menamparambath. "Interfacial Tension-Impelled Self-Assembly and Morphology Tuning of Poly (3, 4-ethylene dioxythiophene)/Tellurium Nanocomposites at Various Liquid/Liquid Interfaces." ACS applied materials & interfaces, 15, 44, 51944-51957, 2023.
8. Hanosh, S, Lekshmi, Bindhu Sunilkumar and Subramanyan Namboodiri Varanakkottu, Sajan D George, Simple fabrication of PDMS grafted hydrophobic iron oxide particles for oil-water separation andstimuli- responsive liquid marbles, ACS Applied Polymer Materials, 5, 3507-3514, 2023.
9. Lekshmi, Bindhu Sunilkumar and Subramanyan Namboodiri Varanakkottu*, Droplet-Impact Driven Formation of Ultralow Volume Liquid Marbles with Enhanced Mechanical Stability and Sensing Ability, Langmuir, 38, 11743-11752, 2022. *Corresponding author
10. Farzeena Chalikkara and Subramanyan Namboodiri Varanakkottu*, Patterning of Metallic Nanoparticles over Solid Surfaces from Sessile Droplets by Thermoplasmonically Controlled Liquid Flow, Langmuir, 38, 2003-2013, 2022. *Corresponding author
11. Subin Kaladi Chondath, Abhishek Pradeep Kumar Sreekala, Chalikkara Farzeena, Subramanyan Namboodiri Varanakkottu and Mini Mol Menamparambath, Interfacial tension driven adsorption of MnO2 nanoparticles at the liquid/liquid interface to tailor ultra-thin polypyrrole sheets, Nanoscale, 14, 11197-11209, 2022.
12. Farzeena Chalikkara and Subramanyan Namboodiri Varanakkottu*, Optofluidic modulator based on thermoplasmonically controlled liquid-liquid interface, Optics Letters, 46, 3993-3996, 2021. *Corresponding author
13. Lekshmi, Bindhu Sunilkumar Ajeet Singh Yadav, Panneerselvam Ranganathan and Subramanyan Nambood- iri Varanakkottu*, Simple and Continuous Fabrication of Janus Liquid Marbles with Tunable Particle Coverage Based on Controlled Droplet Impact, Langmuir, 36, 15396-15402, 2020. *Corresponding author
14. Cunjing Lv, Subramanyan Namboodiri Varanakkottu* and Steffen Hardt, Liquid plug formation from heated binary mixtures in capillary tubes, Journal of Fluid Mechanics, 889, 2020.
15. Thamarasseril Vijayan Vinay and Subramanyan Namboodiri Varanakkottu*, Separation of floating oil drops based on drop-liquid substrate interfacial tension, Langmuir, 35, 10596-10600, 2020. *Corresponding author
16. Pradip Singa, Sreena Swaminathan, Ajeet Yadav and Subramanyan Namboodiri Varanakkottu*, Surfactant-Mediated Collapse of Liquid Marbles and Directed Assembly of Particles at the Liquid Surface, Langmuir, 35, 4566-4576, 2019. *Corresponding author
17. ADP Mozhi, AR Sneha, H Choudhary, Subramanyan Namboodiri Varanakkottu*, SV Dalvi, Predictive Framework for the Spreading of Liquid Drops and the Formation of Liquid Marbles on Hydrophobic Particle Bed, Langmuir, 35, 6657-6668, 2019.
18. Farzeena Chalikkara, Pradip Singa, and Subramanyan Namboodiri Varanakkottu*, Dual functional optofluidic platform based on light-actuated air plug, Sensors and Actuators A: Physical, 285, 659-665, 2019.      *Corresponding author
19. Cunjing Lv, Subramanyan Namboodiri Varanakkottu*, Tobias Bair, Steffen Hardt, Controlling the Trajectories of Nano/Micro Particles Using Light-Actuated Marangoni Flow, Nano Letters, 18 (11), 6924-6930, 2018. *Corresponding author
20. Nimmy John, Subramanyan Namboodiri Varanakkottu and Soney Varghese, Flexible, ferroelectric nanoparticle doped polymer dispersed liquid crystal devices for lower switching voltage and nanoenergy generation, Optical Materials, 80, 233-240, 2018.
21. J. Vialetto, M. Hayakawa, N. Kavokine, M. Takinoue, Subramanyan Namboodiri Varanakkottu, Sergii Rudiuk, M. Anyfantakis, Mathieu Morel and Damien Baigl, Magnetic actuation of liquid drops and liquid marbles with a deformable paramagnetic liquid substrate, Angewandte Chemie Int. Edition, 56(52), 16565-16570, 2017.
22. Emmanouil Anyfantakis+, Subramanyan Namboodiri Varanakkottu+, Sergii Rudiuk, Mathieu Morel and Damien Baigl, Evaporative Optical Marangoni Assembly: Tailoring the Three-Dimensional Morphology of Individual Deposits of Nanoparticles from Sessile Drops, ACS Applied Materials and Interfaces, 9(42), 37435- 37445, 2017. +First authorship shared, contributed equally to this work
23. Banuprasad TN,Vinay TV, Subash CK, S D George, S Varghese and Subramanyan Namboodiri Varanakkottu*(2017), Fast transport of water droplets over a thermoswitchable surface using rewritable wet- tability gradient, ACS Applied Materials and Interfaces, 9(33),28046-28054. *Corresponding author,
24. Vinay TV, Banuprasad TN, Sajan Daniel George, Soney Varghese and Subramanyan Namboodiri Varanakkottu*, Additive-Free Tunable Transport and Assembly of Floating Objects at Water-Air Inter- face Using Bubble-Mediated Capillary Forces, Advanced Materials Interfaces, 4(7), 1601231(1-7), 2017. (Selected as hot paper by Wiley publishers), *Corresponding author
25. Subramanyan Namboodiri Varanakkottu, Emmanouil Anyfantakis, Mathieu Morel, Sergii Rudiuk and Damien Baigl, Light-Directed Particle Patterning by Evaporative Optical Marangoni Assembly, Nano letters, 16(1), 644-650, 2016.
26. Subramanyan Namboodiri Varanakkottu, Henrdryk Engelbart, Sumit Joshi, Martin Still, Wenjia Xiao and Steffen Hardt, Light-controlled tuning of the optical properties of nanoporous glass, Optics Express, 22(21), 25560-25569, 2016.
27. Deepu J Babu,^† Subramanyan Namboodiri Varanakkottu,^† Alexander Eifert,^† Dirk deKoning, Gennady Cherkashinin, Steffen Hardt and Jörg J. Schneider, Inscribing wettability gradient into superhydropho- bic carbon nanotube surfaces, Advanced Materials Interfaces, 1(2), 1300049, 2014. ^†First authorship shared
28. Alexander Eifert, Dorothea Paulssen, Subramanyan Namboodiri Varanakkottu, Tobias Baier, Steffen Hardt, Simple fabrication of robust water repellent surfaces with low hysteresis contact angle based on lubricant impregnated surfaces., Advanced Materials Interfaces, 1(3), 1300138, 2014. (Very Important Paper)
29. Subramanyan Namboodiri Varanakkottu, Sajan Daniel George, Tobias Baier, Steffen Hardt, Martina Ewald and Markus Biesalski, Particle Manipulation based on Optically Controlled Free Surface Hydrodynamics, Angewandte Chemie, 125(28), 7432-7436; Angewandte Chemie Int. Edition, 52(28), 7291-7295, 2013.
30. Pramitha V, Nimmi K P, Subramanyan N V, Rani Joseph, Sreekumar K and Sudha Kartha C, Silver- doped photopolymer media for holographic recording, Applied Optics, 48(12), 2255-2261, 2009. (Hologram re- ported in this paper was the cover image of the journal issue).

Link to my lab website

Dr. Subramanyan NV is an Assistant Professor in the Department of Physics, NIT Calicut. Previously, he was working as INSPIRE faculty in the School of Nano Science and Technology, NIT Calicut. He completed his PhD in Natural Sciences(Physics) from Technical University of Darmstadt, Germany under the guidance of Prof. Steffen Hardt in 2013. He worked as a Post-doctoral scientist at Technical University of Darmstadt, Germany (2013-2015) and Ecole Normale Superieure, CNRS, Paris (2015-2016). He has received prestigious Inspire Faculty award in 2016, Early Career Research Award in 2017 from the Government of India and Kerala State Young Scientist Award in 2020 from the Ministry of Kerala. His research interests include Optofluidics, all-optical systems and light actuated soft matter physics.

Patent granted

1. Subramanyan Namboodiri Varanakkottu, Ragisha CM, Farzeena C, “System for inscribing patterns on metallic nanoparticles layer at Liquid-Liquid Interface and method thereof”; Patent Number: 436763, 2023.

2.  Subramanyan Namboodiri Varanakkottu, Suryasaradhi Balarkan, “An Integrated Beam Chopping and Steering System Using a Linear Optical Chopper and Method Thereof”; Patent Number: 452990, 2023.

Patents filed

1.  Subramanyan Namboodiri Varanakkottu, Lekshmi B S “Method for Simultaneous Fabrication and Collection of Ultra-Low Volume Janus Liquid Marbles and Pristine Liquid Marbles”, application number, 202341027724, 2023.

1. SERB Core Research Grant - Department of Science and Technology (2023-2026), Amount - Rs. 49 Lakhs
2. KSCSTE Young Scientist Award grant (2023-2026), KSCSTE, Kerala, Amount - Rs. 24.25 Lakhs
3. Early Career Research Award - SERB - Department of Science and Technology (2018-2022), Amount - Rs. 47 Lakhs
4. INSPIRE faculty research award - Department of Science and Technology (2016-2022), Amount - Rs. 53 Lakhs
5. DST WISE Kiran Post-doctoral (as mentor) - Department of Science and Technology (2024-2027), Amount - Rs. 35 Lakhs

Link to our lab website: https://oislphysics.wixsite.com/oisl/our-team

Optics, Classical Mechanics, Mechanics and Waves, Waves and Optics, Physics of Nanostructured materials, Physics-first year (Core courses)

Optical Engineering, Fiber Optics, Nanophotonics (Elective courses on Applied Optics)

02.2020         Kerala State Young Scientist Award, Ministry of Kerala, India

06.2017         Early Career Research Award by SERB-Department of Science and Technology, India

06.2017         Young Scientist International Travel Grant by SERB-Department of Science and Technology, India

08.2015         INSPIRE Faculty Award, Department of Science and Technology, India.

03.2015         Post-doctoral fellowship, Ecole Normale Superieure and CNRS, Paris.

09.2009       Ph.D. Scholarship at Center of Smart Interfaces (Cluster of Excellence by DFG), TU Darmstadt, Germany.