Vishnu Chundi

Solution-based methods for graphene synthesis, such as chemical reduction of graphene oxide, electrochemical exfoliation, and liquid-phase exfoliation are suitable for printing applications. This chapter discusses dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPVs) and the improvements brought about by the introduction of graphene. Lithium-ion batteries are widely regarded as the current main energy storage technology for mobile devices, laptops, and hybrid electric vehicles. An… Show more

Solution-based methods for graphene synthesis, such as chemical reduction of graphene oxide, electrochemical exfoliation, and liquid-phase exfoliation are suitable for printing applications. This chapter discusses dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPVs) and the improvements brought about by the introduction of graphene. Lithium-ion batteries are widely regarded as the current main energy storage technology for mobile devices, laptops, and hybrid electric vehicles. An application of graphene at the positive electrode is with next-generation energy storage devices. Lithium–oxygen and lithium–sulfur are perhaps the most representative technologies in this respect. Electric double-layer capacitors (EDLCs), also found in literature as ultracapacitors or, more commonly, supercapacitors, constitute an interesting family of devices that are well suited for short-/medium-term energy storage. The global printed electronics market is expected to grow rapidly in the future. Graphene-based conductive inks have the potential to play a key role in specific parts of the overall market. Show less

Graphene-based materials are intriguing from the perspective of fundamental science and technology because they are non-toxic, chemically and thermally tolerant, and mechanically robust. Graphene exhibits superior electrical conductivity, high surface area and a broad electrochemical window that may be particularly advantageous for their applications in energy storage devices. In addition, graphene can be prepared in the form of a colloidal suspension with adjustable solubility and thus is… Show more

Graphene-based materials are intriguing from the perspective of fundamental science and technology because they are non-toxic, chemically and thermally tolerant, and mechanically robust. Graphene exhibits superior electrical conductivity, high surface area and a broad electrochemical window that may be particularly advantageous for their applications in energy storage devices. In addition, graphene can be prepared in the form of a colloidal suspension with adjustable solubility and thus is suitable for printing applications and offers both transparency and good conductivity at the same time. In this review, applications of graphene in solar cells, batteries, supercapacitors and fuel cells are summarized with the latest developments. Furthermore, graphene as a conductive ink for printed electronics is also discussed. Show less

Graphite was electrochemically exfoliated in mixtures of room temperature ionic liquids and deionized water containing lithium salts to produce functionalized graphenes and such an electrochemical exfoliation technique can be directly used in making primary battery electrodes with significantly enhanced specific energy capacity.

With quantum computing, we are witnessing an exciting and very promising merging of three of the deepest and most successful scientific and technological developments of modern era: quantum physics, computer science, and nanotechnology. Quantum computers have the potential to perform certain calculations billions of times faster than any silicon-based computer. A functional quantum computer will be invaluable in factoring large numbers, and therefore extremely useful for decoding and encoding… Show more

With quantum computing, we are witnessing an exciting and very promising merging of three of the deepest and most successful scientific and technological developments of modern era: quantum physics, computer science, and nanotechnology. Quantum computers have the potential to perform certain calculations billions of times faster than any silicon-based computer. A functional quantum computer will be invaluable in factoring large numbers, and therefore extremely useful for decoding and encoding secret information. In this paper we have discussed contemporary cryptographic systems and their strengths and drawbacks. Two of the most common quantum key distribution protocols have been explained. This is followed by a note on the experimental realizations of quantum key distribution and the associated technological challenges. A few novel extensions of this concept in the future have also been dealt with. This paper aims at familiarizing the reader with the field of quantum cryptography and gives an insight about the latest developments. Show less

In this work, we make use of a new computing paradigm quantum cellular automata (QCA) to describe the design and layout of arithmetic and logical function generator (ALFG). ALFG is made up of several blocks whose outputs are multiplexed for an intended functionality. The design of ALFG was made using the basic elements of technology such as inverter and majority voter. The layout and simulation results are presented using QCADesigner tool. A total of 16 arithmetic and logical operations can be… Show more

In this work, we make use of a new computing paradigm quantum cellular automata (QCA) to describe the design and layout of arithmetic and logical function generator (ALFG). ALFG is made up of several blocks whose outputs are multiplexed for an intended functionality. The design of ALFG was made using the basic elements of technology such as inverter and majority voter. The layout and simulation results are presented using QCADesigner tool. A total of 16 arithmetic and logical operations can be performed on a pair of 4bit vectors. The ALFG presented, offers functions beyond a normal ALU such as shift, parity, XOR, rotate and multiplication along with basic operations. The total area consumed by ALFG is 11.37 mum2 with aid of 9 clocks to give the final output from the generator. The building blocks of ALFG can be added into a 4bit processor in order to make it feasible for additional applications. Show less

Presented this work at the International Conference on 'Emerging Mechanical Technology-Macro to Nano' held at the Birla Institute of Technology and Science-Pilani, India