Abhay Kumar Singh - Chalcogenide: Carbon Nanotubes and Graphene Composites

Abhay Kumar Singh

Department of Mechanical Engineering Science,
University of Johannesburg, South Africa

Tien-Chien Jen

Department of Mechanical Engineering Science,
University of Johannesburg, South Africa

This book is intended for students, researchers and scientists working in the field of chalcogenide nanocomposites or nanocomposite science from broad subjects such as physics, chemistry and nanotechnology and materials science. It would be mainly helpful for researchers, scientists, doctoral students as well as master and graduate levels university/college students, who wish to build a career in the area of chalcogenide-carbon nanotubes composites, chalcogenide-graphene composites, composite nanoscience and nanotechnology.

The prime goal of the book is to provide a clear idea on newly established chalcogenide-carbon nanotubes and chalcogenide-graphene composite materials in the glassy system and provide interpretations on their physio-chemical mechanisms as well as possible future applications in the area of nanoelectronics, optoelectronics, biomedical etc.

An effort has been made to present the topics in the book in a very simple manner. This current research book contains seven chapters, whose topics broadly deal in the beginning with an introduction of chalcogenide glasses to chalcogenide-carbon nanotubes, chalcogenidegraphene composites as well as their potential applications, including an interpretation of their deep physiochemical mechanism at the nanoscale level.

The main features of the book are:

To review the scenarios of nanocomposite science for their wide range of applications in the distinct field of nanotechnology devices and developments.

To illustrate the scenarios of novel chalcogenidecarbon nanotubes and chalcogenide graphene composite science for the glassy system and the vast potential utilities in the various technical areas for device fabrications and developments.

The detailed physio-chemical interpretations are addressed for various kinds of the chalcogenide glassy systems including preparation methods for the fabrication of the advanced nanomaterials functionalization ability to fabricate different kinds of composite materials.

To apprise the consequences of chalcogenide-carbon nanotubes composites materials for their prospective applications. It also points out the established concept of thermal quantum tunneling with a demonstration of highly stiff multi-walled carbon nanotubes, which can disperse and diffuse (partially) in a low dimension chalcogenide glassy system.

To establish the consequences of chalcogenide-graphene composites for their wide range of future applications in various fields. It also acknowledges the concept of thermal quantum tunneling effect with the first successful diffusion (partial) and dispersion of the bilayer graphene in a low dimension chalcogenide alloy scheme.

To enlighten on the contradictory experimental findings of chalcogenide-carbon nanotubes and chalcogenide-graphene composites, in view of predictions of the theoretical concepts on these kinds of possible composites systems.

To notify on subjected composite systems breakthrough experimental findings as well as their interpretations for the possible wide range of applications in various fields in the future.

It discusses the imminent projections and tasks to demonstrate the newly established composite field and their potential nanoscale devices for the safety of the health of society and advanced technology.

This chapter deals with chalcogenide glassy materials and their potential applications in several scientific and technological areas. Chalcogenide materials have attracted great attention due to their importance in nanoscience and nanotechnology. Their scientific and technological advances and adequate flexibility to make composites with the organic compounds were considered. it also briefly demonstrates the fundamentals of chalcogenide materials and their classifications as well as the emergent nano form of the materials. Therefore, crystalline structures of sulfur, selenium and tellurium are interpreted. The technologically significant polycrystalline chalcogenides such as polysulfides, polyselenides and polytellurides structures are also addressed. Since amorphous chalcogenide materials (or amorphous semiconductors) can have many technical applications, therefore, structural properties of these materials are also interpreted. Chalcogenides technical uses are always productive with their alloys along with other periodic table elements in the form of binary, ternary and multi-components alloys, hence a brief note on such compositions are also provided. Technologically sound chalcogenide glasses or amorphous semiconductors structures, types of bonding and related various theoretical models are addressed. These materials band structures are interpreted with the help of various models, while, the principles of defects are demonstrated from different models. A brief interpretation of the photoinduced effects in these materials is given. Moreover, ionic and electrical conductivities are also considered, and their basic concepts are discussed with the help of different theoretical models descriptions. Subsequently, these materials electrical switching is one of the key properties, therefore, threshold switching and memory switching as well as various switching parameters are also addressed. A brief description on the potential utility of chalcogenide glasses (or amorphous semiconducting materials) is provided.