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Reduced Graphene Oxide-Silver Nanocomposite Films For Temperature Sensor Application The present invention relates to nanocomposite comprising reduced Graphene oxide and silver nanoparticles; a method of synthesis of nanocomposite and fabrication of nanocomposite film on a substrate for sensor applications based on the principle of negative temperature coefficient (NTC) of piezoresistive temperature sensing elements. |
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n-Si/Cu2O hole-selective heterojunction with a highly improved open-circuit voltage compared to state-of-the-art, by reducing the defect density at the Si/Cu2O interface by 1000 times Silicon p-n homojunction technology dominates the commercial photovoltaics industry. Notwithstanding the great strides in reducing the cost, high-efficiency p-n junction cells still require high temperatures and ultraclean processes for doping and passivation, which limit throughput. One way to reduce cost further is to replace the p-n homojunction by carrier-selective contacts, such as Si/Cu2O heterojunction. |
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Reduced Graphene Oxide Nanomaterial Coated Cotton fabric as a heating device and method therefore The invention relates to a heating device comprising a fabric integrated with reduced graphene oxide nanosheets films and method of fabrication thereof. The RGO coated cotton cloth based electro thermal film (figure 3(a)) showed a good heating performance. When 40V is applied, the saturated temperature were attained 52º C, 56º C and 62º C for 1 min, 5 min and 5 min under vacuum respectively. It has been observed that, the power drawn by the device at 40 V was 476 mW. |
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Novel wafer scale technique for exact placement of two arrays of Nanoparticles A novel wafer scale technique for exact placement of two arrays of nanoparticles, with graphene as a spacer, has been developed. Placing two nanoparticles at such proximity gives rise to an extremely high field concentration in the gap between the two particles, which has enabled an extremely large near field enhancement, (E/EO) ~ 103. This has resulted in a huge photovoltage (in the order of A/W) and enhancement of the Raman signal (approx. |
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Simple and low-cost liquid phase epitaxy (LPE) technique to grow high quality epitaxial films of germanium on silicon (100) Germanium has significantly high electron and hole mobility compared to silicon, which makes it a promising material for CMOS technology. Ge is used in photonics both as an absorber in near IR as well as a waveguide for mid-IR. Ge is also lattice matched to III-V semiconductors, so good quality III-V films can be grown on Ge substrates. |
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Reduced Graphene Oxide Nanosheets based strain sensor for pressure transducers and method therefore The present invention is in relation to strain gauge based on reduced graphene oxide nanosheets embedded on to cellulose material and integrated on to a stainless steel diaphragm. The invention is also in relation to transducer comprising the aforementioned sensor and method of fabrication thereof. The developed sensors (figure 4(a)) shows the sensitivity of about 1.19 Ω/ bar. |
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Bright-field Nanoscopy Optical wide-field imaging of sub-diffraction limit nanostructures is of interest in a wide array of applications. In applications where the nanostructures to be visualized are well isolated, a high enough optical contrast is sufficient to detect these. We developed a technique called the Bright-field Nanoscopy which allowed the visualisation of Graphene Grain Boundaries (GGBs), nanoparticles, single isolated Carbon Nanotubes (CNTs). |
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Integrating Conformal Ferrite Coatings with Magnetic Nanoswimmers Integrating conformal ferrite coatings with magnetic nanoswimmers has been described, which can provide a promising combination of functionalities such as motion in biological fluids, chemical stability, cytocompatibility etc. The ferrite coatings on the magnetic nanoswimmers makes them stable in biofluids such as blood, facilitating the first successful voyage of artificial nanomotors in human blood at such negligible dilutions as demonstrated in the paper [1]. |
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Graphene Oxide-Platinum Nanocomposite for Sensor Applications The present invention is in relation to fabricated Graphene Oxide (GO) – Platinum (Pt) nanocomposite films for temperature sensor applications based on the principle of negative temperature coefficient (NTC) resistive element. The invention also discloses a process of synthesis of the nanocomposite and method of fabrication of the nanocomposite film on a flexible substrate. |
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Investigations of Two-Dimensional Electron Systems (2DES) Investigations of two-dimensional electron systems (2DES) have been achieved with two model experimental systems, covering two distinct, non-overlapping regimes of the 2DES phase diagram, namely the quantum liquid phase in semiconducting heterostructures and the classical phases observed in electrons confined above the surface of liquid helium. |
NEMS Lab / Micro and Nano Sensors Lab
The Micro and Nano Sensors Lab focuses on physics and applications of Nanoelectromechanical Systems (NEMS). Activities of this lab include fabrication of resonant NEMS devices with frequencies in VHF and UHF ranges, novel actuation and detection schemes at these frequencies and nano-dimensions, study of noise processes that govern the frequency stability of these ultra-sensitive devices and their utility in various applications including NEMS mass spectrometery and gas sensing. Facilities include a NEMS-based mass spectrometery system, two closed cycle cryostats capable of reaching below 10K, an ultra-high vacuum system to probe frequency noise in NEMS devices and electrical characterization equipment including spectrum analyzers and microwave signal sources.
Bio Sensors Lab
Focuses on developing low-cost biosensors for various bioanalytes of interest. Involves study of various surface modification methodologies. Facilities include electrochemical workstation, chemical synthesis equipment, equipment for processing biomolecules.
MEMS/MOEMS Lab
Design and development of MEMS inertial sensors, MEMS microphones, capacitive and peizoelectric ultrasound transducers (CMUTs and PMUTs), suspended gate FET-coupled MEMS sensors, all-optical actuation and sensing MEMS, study of energy dissipation in micro and nanoscale structural vibrations, study of microscale biosensors in insects, haltere dynamics, and cell dynamics. Facilities include experimental measurement tools for subnanoscale vibrations, angular rate measurements, ultrasound transmitters and receivers, and optical imaging, including high speed videography.
Biophotonics and Bioengineering
Our work follows two themes. One is the development of sensors to sense various molecules (molecular sensors) for bio/chemical applications and the other is to understand the molecular sensing process in terms of robustness to interference or perturbation. The robustness often emerges as a consequence of complexity in sensor design and/or in sensory signal processing. Examples of complexity in sensor design could be our olfactory receptors which enable our sense of smell or the signalling cascades employed by immune cells in our body to identify infective pathogens. We are interested in understanding the performance limits of molecular sensing, i.e. limits of sensitivity, accuracy, tolerance to interference and so on.
Optics, Nanostructures and Quantum Fluids
Study of optical and hydrodynamic properties of nanostructured particles and films, with emphasis on developing nanoscale drug delivery vehicles and nanoplasmonic sensors for biological applications. Facilities include nanostructured thin film fabrication system, optical microscope, and various optical characterization tools.
Gas Sensors Lab
The Lab has facilities to characterize sensors employing different concentrations of gases – both inorganic and volatile organics – from ppb (~1) to ppm (>10,000); an IR camera to study the thermal morphology of microheaters; a microdispenser to dispense a desired amount of an analyte (solution) with a 20 μm spatial resolution. The lab also has the facility to fabricate sputtering targets of sensor materials.
Functional Thin Films Lab
The lab conducts investigations on influence of process parameters on the structure and properties of functional thin films, leading to the development of micro and nano sensors and actuators. Faciltiies include evaporation, sputtering and ion beam systems, designed and fabricated for specific requirements.
Photovoltaics and Energy Lab
The lab is primarily designed to fabricate various types of photovoltaic devices. The lab also shares the workload of the National Nano Fabrication Facility.
Polymer Process Lab
The lab specializes in microwavebased chemical synthesis, wet-etching, chemical processing, electrochemical characterization, organic electronics, and thin-film batteries.
Non-linear Photonics and High Power Lasers Lab
This laboratory focuses on development of novel optical sources and processing technologies for varied applications from optical communications, sensing and biomedical imaging to high power industrial and defense lasers. Fundamental research on non-linear optics in guided-wave devices, an enabler for many of the novel laser technologies, is also undertaken.
Neuro-Electronics Lab
The research emphasis is on interfacing neurons of the brain with electronic devices. The broad aim is to understand how learning takes place in biological neuronal networks using electrical and optical recording and stimulation, and to utilize it for robotic control. Facilities available are: nanofabrication of multi-electrode arrays, tissue culture laboratory for neuronal culture, electrophysiology rigs for multi-electrode array recording with feedback control, an electronics lab bench, high-end microscopes with fast fluorescence imaging and optical stimulation of neurons using a femto-second laser.
Heterojunction Lab
This laboratory conducts research in design, fabrication and characterization of novel electronic devices. The focus is on integrating different semiconductor materials with each other, e.g. silicon with metal-oxides or germanium to silicon. Such heterogenous integration introduces novel functionality and improves performance for the next generation of electronic devices.
Photonics
Photonics Research Laboratory is a dedicated characterization facility for integrated photonic devices and circuits. The primary focus of the lab is to develop high-speed integrated photonic devices for next-generation computing and communication. The lab houses a comprehensive high-speed electro-optic testbed for characterizing bandwidth of discrete devices such as Wavelength filters, light modulators, photodetectors, and amplifiers in the O, C, and L bands. The device and circuits developed are tested using a custom developed vertical and horizontal optical probe station. Research in the lab is also aimed at exploiting the photonic circuit for on-chip gas and biosensors. Spectrometers spanning from visible to Near-IR are used to develop such on-chip sensors.
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CeNSE works with several hazardous materials and equipment. We operate with considerable autonomy, so it our responsibility to maintain the highest levels of safety. Furthermore, safety is an important part of any training in nanoelectronics. Potential job givers, be it industry or academia, expect a certain awareness about safety. This is especially true for leadership positions where project managers are responsible for the safety of their whole group. Remember, at CeNSE, it is always Safety First.
The four essential principles of safety are:
FOLLOW RULES
Safety may mean different things to different people. To prevent confusion, we institute policies that clearly define standards for safe work practices. These rules need to be followed in letter and spirit, even if they appear burdensome or pointless. Trust us, there is a reason for everything. DO THINGS THE RIGHT WAY, NOT THE QUICK WAY.
BE ACCOUNTABLE
Everyone is personally responsible for safety. Be a good citizen. Highlight hazards using labels, notices and signage, so that other are adequately warned. Act responsibly in the event of an accident. Confront unsafe behaviour, even if it is uncomfortable to do so. SAFETY IS EVERYONE’S RESPONSIBLITY.
TRUST STRUCTURES MORE THAN PEOPLE
No matter how careful they are, people make mistakes. An effective safety policy does not rely on people to be “careful” but relies on systems to reduce the probability of accidents. Prior to beginning any project, think about all the things that can go wrong. Focus should be on reducing the probability of hazards, even the improbable ones, by intelligently designed precautions. Seek solutions that are “idiot-proof”.
RESPOND TO EMERGENCIES
In case of an emergency, everyone must respond quickly and effectively. Be familiar with fire exits, assembly points, fire alarms, fire extinguishers, eyewash stations, safety showers, spill kits, and first aid boxes. Just a few moments of preparation could save a life during an emergency.
In case of confusion please refer to the CENSE safety manual. For any clarification, feel free to drop an email to safety.cense@iisc.ac.in. Be safe.
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