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学术信息

学术报告:The Applications of Nanotechnology for Food Safety

发布日期:2017-06-22   浏览次数:

报告人:Dr. Yiping Zhao

报告题目:The Applications of Nanotechnology for Food Safety

时间:2017626 9:30

地点:食品学院224会议室

邀请人:廖小军

联系人:吴晓蒙

欢迎感兴趣的老师和同学参加!

 

报告人简介:

Dr. Yiping Zhao received his B.S. degree in Electronics from Peking University in 1991, and MS degree in condensed matter physics from Institute of Semiconductors, Chinese Academy of Sciences in 1994.  He completed his Ph.D. degree in Physics at Rensselaer Polytechnic Institute in 1999.  He is currently a Distinguished Research Professor of Physics in University of Georgia and a SPIE fellow.  Prof. Zhao is the author or co-author of more than 250 peer reviewed journal papers, 2 books, 6 book chapters, and 12 US patents. His major research interests are nanostructures and thin films fabrication and characterization, plasmonic nanostructures, chemical and biological sensors, nano-photocatalysts, and nanomotors. Among these research activities, two are closely related to food safety: chemical and biological sensors forfood safety detection, and developing new materials for antibacterial coating. 

 

报告简介:

Nanotechnology can play a very important role in food sciences and technology. In this talk, I will summarize our work on applying nanotechnology for food safety, specifically surface enhanced Raman scattering (SERS) based sensors and bactericidal nano-photocatalysis. We demonstrate that the aligned silver nanorod (AgNR) array substrates engineered by the oblique angle deposition method are capable of providing extremely high SERS enhancement factors (>108), and are capable of performing high sensitive chemical and biological sensing and diagnostics. Especially in food safety area, we have shown that SERS based on AgNR substrates can be used to detect foodborne pathogens, toxins, contaminations, and adulteration agents. Our investigation demonstrated that the AgNR based SERS can be used to distinguish different types and serotypes of bacteria from real food samples with high sensitivity. It can also be used to discriminate mycotoxins of similar chemical structures, such as aflatoxins, with the help of chemometric analysis of the SERS spectra. Other food contaminations, such as pesticides, melamine, etc., can also be detected with super high sensitivity. In addition, new visible light driven nano-photocatalyst, such as Fe2O3, Bi2CuO4, and carbon dots, are found to be excellent bactericidal materials to eliminate bacteria growth on their coating and can be served as coating materials for food packaging or coating materials for food processing equipment. All these development has demonstrated that properly engineering and designing nanostructured materials play an important role for food safety.