Jie TangNational Institute of Materials Research, Japan
Jie Tang is Group Leader of the One-Dimensional Nanomaterials Research Group and Senior Research Scientist at the National Institute for Materials Science (NIMS) in Tsukuba, Japan. Her recent research focuses on the synthesis, processing, characterization, and applications of low-dimensional nanomaterials including graphene for supercapacitor applications and rare-earth boride nanowires for point electron emission as well as their materials properties under high pressure. She received her B.S. degree from Tsinghua University, China, and Ph.D. degree in physics from Osaka University, Japan. She is also an Adjunct Professor of Physics in the University of North Carolina at Chapel Hill, USA. She has published more than 100 research papers and filed more than 50 patent applications.
Title:Graphene and Carbon Nanotube Composite with 3D Structure: Processing and Structure for Sensing and Energy Storage
SymposiumB04 Others Sensors
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Abstract
Due to its extraordinary properties including structural simplicity and stability, electrochemical activity, large specific surface area, high electrical and thermal conductivity, and ease of functionalization, graphene offers a new opportunity to boost the performance of carbon-based sensors and energy storge devices. The specific capacitance of graphene and graphene-based composites is very sensitive to the processing parameters as well as the material structure at the nanoscale. We have recently designed, fabricated, and characterized a number of graphene-based nanostructured carbon composites as electrochemical electrodes. In this work, graphene and single-walled carbon nanotube composite aerogel and several different nanostructured metal oxides deposited on graphene nano-sheets have been fabricated for selective detection of biomolecules of asuric acid, dopamine, and glucose. In the composite sensors, graphene promotes electron transfer reactions and enhances the electrical signals drastically for biomolecular detection, which is attributed to the special nano-sheet structure and high electrical conductivity. We also will describe the processing of graphene and graphene-based materials aimed at obtaining higher specific capacitance. The nanoscopic structure of the high performance electrode material is analyzed using high-resolution electron microscopy, electron tomography, x-ray diffraction, and Raman spectroscopy. Electrochemical characterization of the graphene composites, which show high energy density in energy storage, will also be presented.