报告人：王中林 教授（美国佐治亚理工学院）
报告题目：From Maxwell’s displacement current to nanogenerator driven self-poweredsystems and blue energy
报告时间：2017年9月20日（星期三）上午10点
报告地点：909楼一楼B厅
摘要
Self-powered system isa system that can sustainably operate without an external power supply forsensing, detection, data processing and data transmission. Nanogenerators (NG)were first developed for self-powered systems based on piezoelectric effect andtriboelectrification effect for converting tiny mechanical energy intoelectricity, which have applications in internet of things,environmental/infrastructural monitoring, medical science, environmentalscience and security. Here, we first present the fundamental theory of the NGsstarting from the Maxwell equations. In the Maxwell’s displacement current, theterm ε(∂E/∂t) gives the birth of electromagnetic wave, which is the foundationof wireless communication, radar and later the information technology. Ourstudy indicates that, owing to the presence of surface polarization chargespresent on the surfaces of the dielectric media in NG, an additional term (∂Ps)/∂tshould be added in the Maxwell’s displacement current, which is the outputelectric current of the NG. Therefore, our NGs are the applications of Maxwell’sdisplacement current in energy and sensors. NGs have three major applicationfields: micro/nano-power source, self-powered sensors and blue energy. We willpresent the applications of the NGs for harvesting all kind mechanical energythat is available but wasted in our daily life, such as human motion, walking,vibration, mechanical triggering, rotating tire, wind, flowing water and more.Then, we will illustrate the networks based on triboelectric NGs for harvestingocean water wave energy, for exploring its possibility as a sustainablelarge-scale power supply. Lastly, we will show that NGs as self-powered sensorsfor actively detecting the static and dynamic processes arising from mechanicalagitation using the voltage and current output signals.
简介
Dr. Zhong Lin (ZL)Wang is the Hightower Chair in Materials Science and Engineering and Regents'Professor at Georgia Tech, and Founding Director and Chief Scientist at BeijingInstitute of Nanoenergy and Nanosystems, Chinese Academy of Sciences. Dr. Wang hasmade original and innovative contributions to the synthesis, discovery,characterization and understanding of fundamental physical properties of oxidenanobelts and nanowires, as well as applications of nanowires in energysciences, electronics, optoelectronics and biological science. His discoveryand breakthroughs in developing nanogenerators establish the principle andtechnological road map for harvesting mechanical energy from environment andbiological systems for powering a personal electronics. His research onself-powered nanosystems has inspired the worldwide effort in academia andindustry for studying energy for micro-nano-systems, which is now a distinctdisciplinary in energy research and future sensor networks. He coined andpioneered the field of piezotronics and piezo-phototronics by introducingpiezoelectric potential gated charge transport process in fabricating newelectronic and optoelectronic devices. This breakthrough by redesign CMOStransistor has important applications in smart MEMS/NEMS, nanorobotics,human-electronics interface and sensors. Dr. Wang was elected as a foreignmember of the Chinese Academy of Sciences in 2009, member of European Academyof Sciences in 2002, fellow of American Physical Society in 2005, fellow of AAASin 2006, fellow of Materials Research Society in 2008, fellow of MicroscopySociety of America in 2010, fellow of Royal Society of Chemistry, and fellow ofthe World Innovation Foundation in 2002. He received 2016 DistinguishedScientist Award from (US) Southeastern Universities Research Association, 2015Thomas Routers Citation Laureate award, 2014 World Technology Prize inMaterials; 2014 the James C. McGroddy Prize for New Materials from America PhysicalSociety, 2013 ACS Nano Lectureship award, 2012 Edward Orton Memorial LectureAward and 2009 Purdy Award from American Ceramic Society, 2011 MRS Medal fromthe Materials Research Society, 1999 Burton Medal from Microscopy Society ofAmerica. He has authored and co-authored 6 scientific reference and textbooksand over 1300 peer reviewed journal articles (16 in Nature and Science, 25 inNature and Science sister journals), edited and co-edited 14 volumes of bookson nanotechnology, and held over 100 US and foreign patents. From SCI database, his entire publications have been cited for over 116,000 times with anh-index of 168; Google scholar gives a citation of 157,000 with an h-index of197. He has delivered over 900 plenary, keynote, invited and seminar talks atinternational and national conferences as well as universities and researchinstitutes worldwide.
联系人：孙旭辉 教授
责任编辑：杨娟
