CONSPECTUS: In the wake of the discovery of the remarkable electronic and physical properties of graphene, a vibrant research area on two-dimensional (2D) layered materials has emerged during the past decade. Transition metal dichalcogenides (TMDs) represent an alternative group of 2D layered materials that differ from the semimetallic character of graphene. They exhibit diverse properties that...

The new carbon age Nanotubes and Graphene a transparent future ahead Graphene is two-dimensional nanomaterial consisting of a single layer of sp 2 network of carbon atoms (Fig. 1a) 1. While the thickness of a graphene sheet is on the order of a single atomic unit, its lateral dimension can approach up to tens of microns. Graphene and its derivatives such as graphene oxide (GO) (Fig. 1b), and re...

Graphene has received much attention as a supercapacitor electrode material due to its chemical inertness in preventing reaction with electrolytes and the large surface area two-dimensional nature. However, when graphene sheets are processed into electrodes, they tend stack together form turbostratic graphite reduced relative total of individual sheets. Separately, electrochemical exfoliation i...

2D crystals, a relatively new type of nanomaterial, have drawn considerable attention over the past 10 years.1 These subnanometer crystals are composed of single layers of atoms or molecules and include carbon (known as graphene), the transition metal dichalcogenides, boron nitride, and many others. They represent a new source of nanomaterials with exotic properties that can vary greatly from t...

Apr i l 20 0 8 Graphene, a newly isolated form of carbon, provides a rich lode of novel fundamental physics and practical applications BY ANDRE K. GEIM AND PHILIP KIM C onsider the humble pencil. It may come as a surprise to learn that the now common writing instrument at one time topped the list of must-have, high-tech gadgets. In fact, the simple pencil was once even banned from export as a s...

The crystal structure of graphene flakes is expected to significantly affect their sensing properties. Here we report an experimental investigation on the crystalline structure of graphene aimed at exploring the effects on the gas sensing properties. The morphology of graphene, prepared via Chemical Vapor Deposition (CVD), Liquid Phase Exfoliation (LPE) and Mechanical Exfoliation (ME), is inspe...

Graphene has shown enormous potential for innovation in various research fields. The current chemical approaches based on exfoliation of graphite via graphite oxide (GO) are potential for large-scale synthesis of graphene but suffer from high cost, great operation difficulties, and serious waste discharge. We report a facile preparation of graphene by rapid reduction and expansion exfoliation o...

A major technological barrier to achieving superior properties of nano-structured composite materials is the difficulty of dispersing fillers uniformly in a host matrix. The existing nanocomposite manufacturing processes achieve property improvements through chemical modifications of filler structures and utilization of chemical interactions between the chemically modified fillers and matrix po...

Owing to the remarkable chemical and physical properties, graphene has been widely investigated by researchers over last 15 years. This review summarizes major synthetic methods such as mechanical exfoliation, liquid phase unzipping of carbon nanotube, oxidation-reduction, arc discharge, vapor deposition, epitaxial growth in silicon carbide. Recent advances application graphene-based lithium io...

Exploratory theoretical predictions in uncharted structural and compositional space are integral to materials discoveries. Inspired by M5SiB2 (T2) phases, the finding of a family laminated quaternary metal borides, M?4M?SiB2, with out-of-plane chemical order is reported here. 11 chemically ordered phases as well 40 solid solutions, introducing four elements previously not observed these borides...