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Research News

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.

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.

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.

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.

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.

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.

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).

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].

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.

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.

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