A nanoscale electronic device simulator, Quantumwise Atomistix Toolkit (ATK), has been used to simulate graphene nanosheet and armchair graphene nanoribbon based sensors. In this method, a change in the photocurrent, as well as electric current, have been used as detection signals to improve the sensor accuracy and selectivity for specific target molecules. A novel method for the detection of organic compounds (phenol and methanol) has been introduced in this article. The purpose of the work presented in this article is to demonstrate the ability of graphene derivatives to detect toxic organic compounds like phenol and methanol. This property of graphene makes it a suitable candidate for sensor applications. Graphene is very sensitive to any physical changes in its surrounding environment and, inherently, has very low electronic noise.
Over the last decade graphene based electronic devices have attracted the interest of researchers due to their exceptional chemical, electrical and optical properties. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. The relationship between the strain and stress plays an essential role in graphene mechanics. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications.