Self-Assembled UV Photodetector Made by Direct Epitaxial GaN Growth on Graphene.

Hybrid systems based on the combination of crystalline bulk semiconductors with 2D crystals are identified as promising heterogeneous structures for new optoelectronic applications. The direct integration of III-V semiconductors on 2D materials is very attractive to make practical devices but the preservation of the intrinsic properties of the underlying 2D materials remains a challenge. In this work, we study the direct epitaxy of self-organized GaN crystals on graphene.

No cytotoxicity or genotoxicity of graphene and graphene oxide in murine lung epithelial FE1 cells in vitro.

Graphene and graphene oxide receive much attention these years, because they add attractive properties to a wide range of applications and products. Several studies have shown toxicological effects of other carbon-based nanomaterials such as carbon black nanoparticles and carbon nanotubes in vitro and in vivo. Here, we report in-depth physicochemical characterization of three commercial graphene materials, one graphene oxide (GO) and two reduced graphene oxides (rGO) and assess cytotoxicity and genotoxicity in the murine lung epithelial cell line FE1.

Doping characteristics of iodine on as-grown chemical vapor deposited graphene on Pt.

Using laboratory X-ray photoelectron emission microscopy (XPEEM), we investigated the doping efficiency and thermal stability of iodine on as-grown graphene on Pt. After iodine adsorption of graphene in saturated vapor of I2, monolayer and bilayer graphene exhibited work function of 4.93 eV and 4.

Effective supergrowth of vertical aligned carbon nanotubes at low temperature and pressure.

We present the generalised supergrowth of single and double walled carbon nanotubes like "water assisted supergrowth" at low temperature (630 degrees C) and pressure (1 Torr) by chemical vapour deposition using various thicknesses of iron supported alumina substrate as a catalyst. Reduced temperature and low pressure synthesis of single walled (SW) and double walled (DW) carbon nanotubes is of interest for their efficient growth into device architectures. Pure SW with 2.