Multi-functional analytical and sensing devices based on graphene encapsulated noble metal nanoparticles and their nanowire-based heterostructures

University Of Alabama Tuscaloosa, Tuscaloosa AL

Investigators

Abstract

Multi-functional analytical and sensing devices based on graphene encapsulated noble metal nanoparticles and their nanowire-based heterostructures PI: Nitin Chopra, Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa. This research endeavor focuses on novel multi-functional and multi-component analytical and detection devices based on graphene encapsulated noble metal nanoparticles (GE-NMPs). Fabrication of a continuous and non-porous graphene shell offers a unique way to stabilize noble metal nanoparticles (NMPs) lending multi-functionality and unique properties to these hybrid nanomaterials. Such nanomaterials are of enormous importance for homeland and border security, sensor industry, and analytical device technology. The research involves studies on the growth of GE-NMPs and their nanowire-based heterostructures using a chemical vapor deposition (CVD) process. The information will be broadly applicable to many materials systems that have an ability to catalyze carbon growth and will be a notable advancement in the area of novel graphene-based nanomaterials and devices. These materials are highly robust and can be readily functionalized for further applications. The approach is to fully utilize the functions of the individual components (graphene and noble metal nanoparticle) to locate, detect, separate, and assemble chemical species with enhanced signals. In addition, hybrid nanomaterials will be vital in realizing advanced engineering applications, including, chemical and biological sensors and novel spectroscopy substrates that integrate a uniquely heterostructured nano-electromechanical system (NEMS). These devices will have high resolution, chemical selectivity, improved sensitivity and detection limits, reversibility, and robustness. The research program is multidisciplinary and has strong fundamental and technological components allowing students to work and gain experience in cutting edge nanotechnology research.