A5088080696- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- 2D Materials and Applications
- Advanced Memory and Neural Computing
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Chemical Sensor Technologies
- Semiconductor Quantum Structures and Devices
- Ferroelectric and Negative Capacitance Devices
- Transition Metal Oxide Nanomaterials
- Advanced Semiconductor Detectors and Materials
- Graphene research and applications
- Electrochemical sensors and biosensors
- MXene and MAX Phase Materials
- ZnO doping and properties
- Advanced MEMS and NEMS Technologies
- Quantum and electron transport phenomena
- Advanced biosensing and bioanalysis techniques
- Nanowire Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and interfaces
- Advanced Glycation End Products research
- Neuroscience and Neural Engineering
- Integrated Circuits and Semiconductor Failure Analysis
- Mechanical and Optical Resonators
Indian Institute of Science Bangalore
2016-2025
Samatvam Endocrinology Diabetes Centre
2023
Ida Darwin hospital
2022
University of Cambridge
2022
Institut für Mikroelektronik Stuttgart
2021-2022
Polytechnic University of Turin
2021-2022
Institute of Electrical and Electronics Engineers
2019-2021
Massachusetts Institute of Technology
2019-2021
Nagoya Institute of Technology
2019-2021
National Yang Ming Chiao Tung University
2021
Diabetes leads to chronic microvascular complications for the heart, kidney, and eyes due uncontrolled glycemic fluctuations. Self-monitoring blood glucose meters can only provide a snapshot of level are incapable capturing granular fluctuations over 24 h in day. The clinical research has indicated that random lead organ damage. In pursuit better management, Continuous Glucose Monitoring (CGM) is emerging as popular alternative owing its ability detect instantaneous changes levels alert...
Flexible pressure sensors have gained considerable attention for their potential applications in wearable electronics and human–machine interfacing. However, two major bottlenecks widespread usage (i) achieving high sensitivity over a wide working range (ii) constituent material platform manufacturability environmental safety still limits its utility. Herein, we suggest low-cost hierarchical construction strategy, which enhances the of paper-based piezoresistive sensor range. This strategy...
Abstract Chalcogens are oxygen family elements with having distinct properties than the other group members like sulfur, selenium, and tellurium. Tungsten molybdenum chalcogenides that include mainly metal oxides (MO 3 ; M = Mo, W) dichalcogenides (MX 2 X S, Se, Te) most exciting class of inorganic materials. They have been widely investigated in various applications including lithium sodium ion storage, supercapacitors, gas sensors, biosensors etc. due to their fascinating surface ease...
A new substrate (~30-nm HfO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /Si) is developed for high-performance back-gated molybdenum disulfide (MoS ) transistors. Record drain current I xmlns:xlink="http://www.w3.org/1999/xlink">ds</sub> ~180 μA/μm and transconductance value g xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> ~75 μS/μm at V = 1V have been achieved 1-μm channel length multilayer MoS transistors on /Si substrate. The...
A chemiresistive, 1T-TiS2 nanosheet (TNS) based gas sensor has been developed, and its ultrahigh sensitivity toward hydrogen sulfide (H2S) oxygen (O2) at room temperature experimentally demonstrated. The displayed room-temperature detection with a maximum response of 395% to 4 ppm H2S (reducing gas) in dry air 234% 100% (oxidizing ambient conditions. O2 sensing humid environment (40% 80%) also demonstrated so as ensure the reliable operation real-time applications. ultrasensitive nature...
CuO is a multifunctional metal oxide excellent for chemiresistive gas sensors. In this work, we report CuO-based NO2 sensors fabricated via chemical vapor deposition (CVD). CVD allows great control on composition, stoichiometry, impurity, roughness, and grain size of films. This endows with high selectivity, responsivity, sensitivity, repeatability, low hysteresis, quick recovery. All these are achieved without the need expensive unscalable nanostructures, or heterojunctions, technologically...
The design of nanostructures with unique morphologies and enhanced functionalities is a cornerstone modern materials science. Ion exchange reactions in inorganic crystals offer versatile approach for precisely controlling the composition, morphology, properties through stepwise transformations. In this study, we report anion-exchange-mediated conversion 2D layered material SnS2 into SnSe2, SnS2–SnSe2 lateral heterostructures as intermediates. This transformation, driven by disparate...
Variability and lack of control in the nature contacts between metal/MoS2 interface is a major bottleneck realisation high-performance devices based on layered materials for several applications. In this letter, we report reduction Schottky barrier height at by engineering surface states through sulphur treatment. Electrical characteristics back-gated MoS2 field effect transistor structures were investigated two high work-function metal Ni Pd. Contacts treated with exhibited significant...
In this study, we have investigated the thickness-dependent nitrogen dioxide (NO2) sensing characteristics of a reactive-ion magnetron sputtered tungsten trioxide (WO3) film, followed by morphological and electrical characterizations. Subsequently, material was integrated with an MEMS platform to develop sensor chip integrate electronics for portable applications. Sputtered films are studied their performance under different operating conditions discover optimum thickness film integrating it...
MoS2 monolayers exhibit excellent light absorption and large thermoelectric power, which are, however, accompanied by a very strong exciton binding energy - resulting in complex photoresponse characteristics. We study the electrical response to scanning photo-excitation on monolayer (1L) bilayer (2L) devices, also monolayer/bilayer (1L/2L) planar heterojunction monolayer/few-layer/multi-layer (1L/FL/ML) double devices unveil intrinsic mechanisms responsible for photocurrent generation these...
The inability to scale supply voltage and hence reduce power consumption remains a serious challenge in modern nanotransistors. This arises primarily because the Sub-threshold Swing (SS) of thermionic MOSFET, measure its switching efficiency, is restricted by Boltzmann limit (kBT/q = 60 mV/dec at 300 K). Tunneling FETs, most promising candidates circumvent this limit, employ band-to-band tunneling, yielding very low OFF currents steep SS but expense severely degraded ON currents. In...
A 2D/0D heteronanostructure (HNS) employing WSe2 as 2D nanosheets and Fe3O4 0D nanoparticles has been facilely synthesized at room temperature using a simple wet chemical route. The process involved liquid-phase exfoliation of nanosheets, followed by coprecipitation method for the subsequent nucleation on former. hence-formed hybrid along with its pristine counterparts investigated ammonia-sensing properties. Herein, behaves p-type semiconductor an n-type per trends observed in modulation...
A scalable and CMOS-compatible fabrication of a transition-metal dichalcogenide–oxide heterostructure based chemiresistive sensor for the selective detection hydrogen sulfide (H2S) gas is detailed here. WS2 nanosheets, obtained by liquid exfoliation technique, were used as seed 2D material fabricating nano heterostructures. Using microwave-irradiation-assisted solvothermal (MAS) process, ZnO nanorods (1D) grown in situ on these resulting 2D/1D heterostructure. The processing an alcohol-rich...
We have developed a smart, Internet of Things (IoT)-enabled, intelligent, and flexible humidity sensor for human respiration rate monitoring by using heterostructure two-dimensional (2D) germanium(II) sulfide (GeS) zero-dimensional (0D) gold nanoparticles (Au NPs). The 2D GeS was synthesized facile liquid-phase exfoliation process, followed the post-functionalization Au NPs. Furthermore, chemical structural integrities were corroborated microscopic spectroscopic techniques. as-prepared...
Biological neurons are electro-mechanical systems, where the generation and propagation of an action potential coupled to transmission acoustic wave. Neuristors, such as VO2, characterized by insulator-metal transition (IMT) negative differential resistance, can be engineered self-oscillators, which good approximations biological in domain electrical signals. In this study, we show that these self-oscillators electro-opto-mechanical with better energy conversion coefficients than...
Cys34 albumin redox modifications (reversible "cysteinylation" and irreversible "di/trioxidation"), besides being just oxidative stress biomarkers, may have primary pathogenetic roles to initiate and/or aggravate cell, tissue, vascular damage in diabetes. In an exploratory "proof-of-concept" pilot study, we examined longitudinal changes oxidation during diabetes therapy.
In this work, for the first time, different techniques to strengthen atomic orbital overlap are proposed engineer metal - graphene contact, while highlighting relevance of sp-hybridized carbon atoms in contact region. The fundamental understanding contact's quantum chemistry has resulted record low resistance CVD when compared with best reported till date as well epitaxial contacts. Role engineering terms reaching FET's intrinsic limits scalability is presented detail. Finally, high...