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IISc Scientists New Discovery Yields a Giant Leap in Graphene Transistor Performance Primary tabs

In a major breakthrough in the field of graphene based electronics, researchers from the Indian Institute of Science, Bangalore, have shown a big jump in understanding the quantum nature of graphene’s interface with outside world. The research team lead by Prof. Mayank Shrivastava (Department of Electronic Systems Engineering), studied how the overlap of atomic orbitals between Carbon and metal atoms affects the graphene-metal interface. The study has enabled them to invent novel techniques to engineer graphene contact that has the lowest recorded resistance to the external world. Their discovery and subsequent invention, while breaking several records – including the one from IBM’s research centre in T. J. Watson, USA – has eventually allowed achieving the highest transistor performance. This work, which is co-authored by PhD student Adil Meersha and co-investigators Prof. Srinivasan Raghavan and Prof. Navakanta Bhat is showcased at International Electron Device Meeting (IEDM), the world’s most competitive platform in the field of electron devices, which mostly showcases technology and fundamental breakthroughs in the field.

Novel Methodology to automatically filter relevant parts from documents

Product designers have the responsibility of ensuring the product they design goes to production without any issues. There are various snippets of “knowledge” available in the form of historic production documents, shop floor records, case studies, etc., both offline and online, that can greatly help get an early insight into potential issues. However, a major drawback is the lack of identifying “knowledge” based on this due to their fragmented distribution. Now, researchers at the Indian Institute of Science, Bangalore, Mr. N. Madhusudanan, Prof. Amaresh Chakrabarti and Prof. B. Gurumoorthy, at the Centre for Product Design and Manufacturinghave developed a method for automatically recovering relevant information from document collections. They validated this methodology in the context of aircraft assembly.

Scientists use Nanotechnology to resist wear

In a recently published study, scientists at the Indian Institute of Science, Bangalore, are addressing one of the biggest challenges faced by many appliances - wear and friction due to usage. Wear and friction affects the lifetime of industrial equipment, which directly correlates with the profitability of the business. The teams of researchers, led by Prof. M.S. Bobji at the Department of Mechanical Engineering are now experimenting with alumina based nanocomposite coating for wear resistance.

Smaller the size, better the functionality - Certain materials can change polarization and magnetization on shrinking, discover scientists

Ferroelectric materials carry a spontaneously polarized charge within their crystalline structure that can be reversed by the application of an electric field. As scientists try to shrink them to nanometre sizes, these materials often lose their polarization. Now, a collaborative research team from India and Germany has observed an unexpected effect in the ferroelectric alloy of bismuth ferrite and lead titanate (BiFeO3-PbTiO3). They have found that mechanically grinding this material to smaller sizes actually leads to a different atomic arrangement - a new structural phase that retains the polarization with slight alteration. This discovery opens up interesting possibilities for using this ferroelectric material in a variety of miniaturised devices - computer memory, RFIDs, sensors and actuators.

Scientists investigate zinc oxide nanostructures for biomedical applications

Nanotechonology, the field of science that manipulates objects at atomic or molecular level, is tout to be the science of the future. Researchers across the globe are working rigorously to tapthe potential this possesses. In a recent multinational collaborative study, researchers from the Indian Institute of Science(IISc), Bangalore, the Heriot-Watt University, Edinburgh, UK, and the Georg-August-Universität, Göttingen, Germany, have tried exploring the biomedical applicability of zinc oxide (ZnO) nanostructures. The results of this study have opened up novel possibilities in nanoscience research, especially pertaining to the field of biomedicine.

Scientists Design Novel Inverters for Harnessing Solar Power

Solar power has the potential to reverse the environmental challenges faced by the world today. With solar panels becoming economically viable and efficient by the day, solar energy may soon become the prime source of electricity. However, there are a few challenges faced in the process of electricity production through solar energy. In a recent study, researchers at the Indian Institute of Science, Bangalore, have addressed one such challenge while converting the Direct Current (DC) output of solar panels into Alternating Current (AC) required to run our appliances. Dr. Abhijit Kulkarni and Prof. Vinod John from the Department of Electrical Engineering have developed a new start-up method for a compact and efficient photovoltaic inverter that works with solar panels to convert DC to AC.

Augmented Reality based App to aid Design Engineers

In a multinational collaborative study, researchers have designed a novel mobile app that can help novice designers in converting existing artifacts or mechanical objects into abstract representations. Prof. Amaresh Chakrabarti from the Centre for Product Design and Manufacturing, Indian Institute of Science, Bangalore and his team, consisting of researchers from Taiwan, have used Augmented Reality to build this tool that can aid design innovation.

Microemulsion Polymerization: Creating clean and green nano-size polymers

Nano-size polymers have made headlines in the recent years for their biological and medical applications. With dimensions of less than 100 nanometers (nm), they can carry drugs and pharmaceuticals in the body due to their subcellular size, sustained release properties and biocompatibility with our tissues and cells. But how are these nano-size polymers synthesized? In a recently written book chapter in the book, ‘Nano-size polymers: preparation, properties, application’, Prof. Manas Chanda, a retired faculty from the Indian Institute of Science, Bangalore and an expert in the field of polymers, has enunciated the direct synthesis of these tiny polymers by a method called microemulsion polymerization.

Towards a Clearer Picture in Biomedical Imaging: An Improved Algorithm for Photo Acoustic Tomography

In a collaborative study between the Indian Institute of Science (IISc), Bangalore, and the University of Twente, The Netherlands, researchers have designed a new algorithm for image recovery in Photoacoustic Tomography (PAT). PAT is an important non-invasive biomedical imaging technique where the optical contrast rendered by laser beams and the superior resolution of ultrasound waves are used to study biological tissues. The new algorithm works better with higher accuracy as compared to the conventional ones in use today.