Gupta Research Group
Experimental Condensed-Matter Materials Physics & Nano-Biophysics
Our current research involves synthesis, processing, characterization and fabrication of nanoengineered electrodes for a range of electrochemical energy conversion and storage systems and developing biological platforms for direct electron transfer kinetics and FRET biosensing. We exploit exotic frontier carbons such as graphene-family nanomaterials (GFN), graphene-related-related materials (GRM), activated graphene (AG), carbon nanotubes (CNTs), graphene quantum dots (GQD) and carbon-dots, besides conducting polymers (CPs), transition metal oxides (TMO) and mesorporous nanoSi (po-nSi). We are also exploiting GFNs and nanodiamond for biocatalytic sensors platforms. The current activities are motivated by the demand for improved or entirely new functional materials. Graphene, the two-dimensional system notoriously hard-to-handle turned out to be a millennium nanomaterial. It holds great promise either by itself or as derivatives to drive down the economy of electrochemical energy devices. We exploit a range of electrochemical and light scattering techniques to answer key questions pertaining to the performance of these tailored design electrodes surfaces and to probe the nature of dynamical electrochemical processes occurring at the electrode/electrolyte interfaces as well as structural and morphological changes associated with charge-discharge cyclability in supercapacitor, psuedocapacitors and batteries and others. We continued to explore other advanced characterization tools including scanning electrochemical microscopy (SECM) providing greater insights on electrodes surface and heterogeneous electron transfer kinetics at local level with mapping capabilities. A major focus of our research is on improving the performance of these electrochemical electrodes by a. strategic designing of tailored graphene-nanomaterial interfaces b. merging structural chemistries c. incorporating novel growth approaches and d. complementing with computational materials science thereby guiding in materials design. Recently, we carried out Raman spectroscopy of van der Waals solids i.e. 2-diemnsional layers of dichalcogenides (MoS2, WS2), h-BN forming heterostructures with graphene to develop new electronic and photovoltaic devices. In summary, our research involves science and engineering aspects of advanced low-dimensional (0-D, 1-D, 2-D) carbons. To achieve our goals, we use a range of complementary analytical characterization techniques either in-house or through external collaboration, to establish microscopic structure-processing-property-function (traditional materials science tetrahedron) correlations. We occasionally participate in technology transition to benefit society, such as through intellectual property.
For more details, please see our research page – UNDER CONSTRUCTION!
Ongoing Research Activities
· Graphene-family and graphene-related nanomaterials
· Multifunctional graphene-based hybrids – novel synthetic approaches
· Electrochemical electrodes as supercapacitors and batteries
· Dynamic and direct electron transfer (DET) processes in metalloproteins (interfacial aspects)
· Graphene quantum-dots, Carbon-dots, FRET biosensing
· Conducting polymer nanostructures and nanocomposites with carbon nanotubes and graphene
· Physics and chemistry of carbon-based materials
· Nanocomposites and hybrids (multifunctional / structural)
· Topology and geometry aspects in materials science
Note: We are always looking for motivated, hard-working undergrads and grad students who want to dive into the world of nanoscience, energy and biophysics. Our research students, with backgrounds ranging from physics, chemistry biology, and engineering, are working in addressing fundamental and applied problems of modern nanoscience.
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