Label‑free optical sensors

• Development of portable prototype surface plasmon resonance sensor unit.

• Integration of surface plasmon resonance sensor unit with a commercial spectroscopic ellipsometer.

• In-situ investigation of sensor response towards detection of chemical and biological analytes.

• Deployment of SPR sensing unit for on-site detection of chemical and biological molecules.

Biosensor and Bioelectronics, 25, 2633–2638 (2010); Sensors and Actuators B: Chemical, 231, 203–210 (2016); Sensors and Actuators B: Chemical, 301, 127070 (2019). Plasmonics 16 (5), 1677-1683 (2021).

Active whispering gallery mode microresonators

• Preparation of Zinc oxide microspheres using the hydrothermal technique.

• Preparation of fluorescent protein microspheres using emulsion technique.

• Investigation of whispering gallery modes in individual microspheres using micro-PL.

• Analysis of whispering gallery modes using the Mie-theory and Finite‑element method.

• Developing label-free & ultra‑sensitive whispering gallery mode optical sensing.

Applied Physics Letters, 03, 051108 (2013); Optics Express, 21(3), 3010-3020 (2013); Journal of Applied Physics, 125 (17), 026917 (2019); Journal of Physics D: Applied Physics 55 (5), 055101 (2022).

Fabrication of periodic nanostructures

• In-housed developed magnetic force-assisted nanoimprint lithography tool.

• Fabricated one-& two-dimensional periodic nanostructures over a large area using sequential NIL.

• Investigation of plasmonic sensing properties using periodic nanostructures for developing biosensors.

• Fabrication of anti-reflective and self-cleaning surfaces.

Nano Express, 1, 010039 (2020); Materials Research Express, 4, 025008 (2017).

Fabrication of flexible SERS sensing platform

• Synthesis of core-shell gold and silver nanoparticles.

• Fabrication plasmonic nanopyramids arrays on a flexible substrate.

• Analysis of optical field confinement using numerical simulation.

• Detection of hazardous dye molecules and protein biomarkers.

ACS Appl. Nano Mater. 4 (11) 12278–12288 (2021); Nanomedicine, 16 (11), 909–923 (2021); Nano Res. (2022), https://doi.org/10.1007/s12274-022-4745-0

Photocatalysis & Wastewater treatment

• Synthesis metal nanoparticles decorated semiconductor nanostructures using both Physical and chemical techniques.

• Synthesis of core-shell metal-semiconductor nanostructures using the chemical technique.

• Implemented as photocatalyst for degradation of toxic organic and industrial dyes.

New Journal of Chemistry, 42, 13689-13701 (2018); Colloids and Surfaces A: Physicochemical and Engineering Aspects, 630, 127555 (2021); Nanotechnology, 33, 335702 (2022).