凯发

Speaker-Shouwu Guo

Shouwu Guo
Shanghai Jiao Tong University, China
Shouwu Guo is currently a professor at Shanghai Jiao Tong University. He serves also as a scientist-in-chief for Shanghai Tan Yuan Graphene Co., LTD, and the associate director of MOE Key Lab for Thin Film and Ultrafine Technology at Shanghai Jiao Tong University. Shouwu received his doctorate degree from Weizmann Institute of Science, Israel, in 1999, and worked as postdoctoral and research scientist in University of Minnesota and Northwestern University, USA, from 1999 to 2005. His research interests are always focused on the controlled fabrications and applications of low dimensional nanomaterials, energy storage materials and devices based on graphene, and the novel nanoscaled catalytic systems and sensors. He has published more than 70 papers in peer-reviewed journals, holds more than 17 patents, and has been conferred several awards including Pujiang Talents Scholarship of Shanghai (2006), Hundred Talents Program of Chinese Academy of Science (2003), Sanqin Scholarship of Shanxi Province (2011),and Innovation Talents Award of Jiangsu Province (2013).
Title:Insight into the Effect of Lateral Size of Graphene Quantum Dots on Their Properties and Biological Application
SymposiumMedical application
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Abstract

The lateral size of graphene quantum dots (GQDs) is crucial for their biological applications and the construction of nanoscaled optoelectronic and electronic devices. In this work, we showed that different sized GQDs with a narrow size distribution could be obtained via gel electrophoresis of the crude GQDs prepared through a photo-Fenton reaction of graphene oxide (GO). It is illustrated further that the photoluminesce (PL) emissions of the well-defined GQDs originated mainly from the peripheral carboxylic groups and conjugated carbon backbone planes through fluorescence and UV-vis spectroscopies. More importantly, our findings challenge the notion that the excitation wavelength dependent PL property of the as-synthesized GQDs is the intrinsic property of the size-defined GQDs. Additionally, preliminary data at the cellular level indicated that the small sized GQDs exhibit weaker quenching DNA dye ability but higher toxicity to the cells compared to that of the as-synthesized GQDs. 

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Abstract: Minyang Lu

Sponsor: Wenyang Yang

Media: Liping Wang

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