Centre for Nanoscience and Nanotechnology
Bharathidasan University, Tiruchirappalli, India

Research

III -Nitrides
III-Nitride semiconductors (GaN, InN and AlN) are technologically important wide bandgap semiconductors widely used for the commercial production of light emitting diodes in the visible region, particularly high brightness Blue and Ultra-violet for the primary applications in cell phone back lighting, traffic signals, outdoor displays, projection television, white light source and other high-end consumer products. The unique intrinsic properties of nitride system with polarisation charges make them suitable for the high temperature and high power electronic devices, which are widely used in wireless communication and high speed defence radar communications and also there is a widespread interest in automobiles and power transmissions. We can acquire the technologically to fabricate the well ordered defect free nitride nanowires and basic understanding of driving mechanism for self-catalytic approach. As these are the technology important materials, nitride NWs can be explored for varieties of above described applications ranging from nanoelectronics to life sciences.

Organic-inorganic hybrid ferroelectric perovskite solid solution materials for optoelectronic devices
Currently, the organic halide and non-halide inorganic Ruddlesden-Popper perovskites materials have attracted in solar cell applications. Inorganic and organic hybrid solid solution materials have fascinating semiconducting properties and tunable band gap than well known silicon and gallium arsenide semiconductor. The promising molecular engineered distorted improper hybrid ferroelectric perovskite semiconductor materials offer prominent chemical and electrical properties for employing optoelectronic devices such as highly stable planar solar cells and white light-emitting diodes.

2D materials
2D materials, are ideal quantum well structures having monolayer thickness, such as graphene, TMDs, BN, BP and etc, are rapidly rising star on the perspective of materials science and condensed matter physics that promises to transform the future. 2D materials is intrinsically gifted with an atomically thin nature, electrostatic integrity, and tunable wide band gaps, ambipolar tuning of conduction, high mobility and gate tunable superconductivity which has dramatically revolutionized and triggered the scientific community to develop new nanoscale devices with exceptional transport properties as it the most promising substitution for Si in the next-generation semiconductor industry. As the charge carriers are strongly confined in atomically thin layers that are extremely influenced by gate voltage, thereby widening the range of applications toward high energy efficient devices such as field effect transistors (FETs), tunnelling diodes and FETs, photodetectors, Phototransistors and etc. In particular, a surge of interest is devoted towards developing a new architecture by coupling two 2D materials via vdW interaction. The ability to couple two atomically thin materials inherits a lot of merits in its architecture itself as it can create atomically sharp interface with desired band alignment and without any dangling bonds and native oxides, which is highly desirable for attaining high performance devices. Toward the goal, we are extensively involved in the fabrication perfect 2D materials and their heterostructure by chemical vapor deposition approach for high performance electronic and optoelectronic device applications.

Multifunctional nanomaterials for drug targeting and therapeutic dynamics response detection at single cell level
Nanoscale drug delivery systems have been designed to improve the efficacy and reduce the systemic toxicity of a wide range of conventional therapeutics. The clinically approved nanoparticle have not shown better clinical outcomes and long term clinical success, which has led to the development of new startegies to improve the efficacy of nanoparticle through the addition of active target elements and contrast agents, termed as multifunctional nanoparticles. Tailoring nanomaterials with multiple functionalities provide a multimodal approach in the fight against cancer, and expected to integrate several clinical paradigms. Our group is involved in the fabrication of different polymeric hybrid conjugates as a therapeutic and thernostic carrier for drug targeting and multimodal imaging application both in vitro and in vivo model. Further, we progressed a step forward to understand the therapeutic efficacy by Surface enhanced Raman scattering technique.

Since its discovery, SERS has been emerged as an identical tool to sense the molecular events, monitoring the cellular process, identifying cellular senescence, and early diagnose of diseases at single cell level. There are many plasmonics based hybrid materials are developed for label-free Raman imaging platform for the visualization of intracellular components and real-time tracking of drugs based on fingerprint of internalized molecules. In our group, we aim at understanding how the drug accommodated nanocarrier systems interact with cellular compartments. For this, we design and implement high efficient SERS substrate with plasmonics hybrid architecture's that quantitatively report interactions of cells in in vivo condition. We seek to grasp the interaction of drugs with cellular components and it's to be validating with the fingerprint of molecular components. We aim to provide an ultra-sensitive technique for single cell detection for molecular diagnostic.