题  目: Semiconducting Nano-heterostructures: from Artificial Photosynthesis to Artificial Retina

讲座人: 郑耿锋 教授

复旦大学

中国化学会青年化学奖获得者

国家基金委优秀青年科学基金获得者

时  间: 2015年5月15日(星期五) 16:00

地  点: 厦门大学卢嘉锡楼二楼报告厅（202）

The solar energy-driven photoelectrochemical (PEC) water splitting and artificial photosynthesis have been continuing to drive substantial developments in new materials and methods for optimizing the energy conversion and utilization efficiency. Meanwhile, these studies have been inspiring research efforts in utilizing the PEC conversion platform to investigate the chemical/biological targets in life sciences. Here, we would like to present our recent works in designing and fabrication of semiconductor nano-heterostructures that are capable of being tailored during synthesis for enhanced solar energy-driven PEC energy conversion and utilization, including efficient photoabsorption, charge separation, and charge transfer. In addition, attributed to their suitable band alignment and excellent photoactivity, these nanowire-based structures are capable of post surface functionalization for molecular recognition and PEC catalysis, leading to solar energy-driven, real-time, sensitive detection of a variety of biologically important molecules for cellular signaling and enzymatic functions. Moreover, the chemical stability and biological benignity of these nanowire arrays further enable direct interfacing with primary neuron networks and in-situ photoelectrochemical neuron stimulation for artificial retinas. These hybrid nanowire photoelectrodes suggest new structures with enhanced photoactivity and sensitivity, which may allow for new exciting studies of interfacing of nanomaterials and biomaterials.

Biography:
Prof. Gengfeng Zheng obtained his B.S. degree (2000) at Fudan University in China, and Master (2004) and PhD (2006) degrees in Chemistry at Harvard University in USA, under the guidance of Prof. Charles Lieber. He was a postdoctoral fellow working with Prof. Chad Mirkin at Northwestern University in USA (2007−2009). He became a full professor at Department of Chemistry and Laboratory of Advanced Materials at Fudan University in 2010. He was a recipient of the Chinese Chemical Society Youth Award (2014), NSFC Excellent Young Scholar Grant (2013), the Shanghai Eastern Scholar Professorship (2012), the Chinese Ministry of Education New Century Excellent Talent (2011), the Shanghai Pujiang Talents (2010), the Northwestern University Outstanding Researcher Award (2009), the American Academy of Nanomedicine Young Investigator Award (2006), and the Materials Research Society Graduate Student Gold Award (2006). His research interests include low-dimensional semiconducting nanomaterial-based synthesis and surface chemistry, biosensing, interfacing with cells, photoelectrochemical conversion, photocatalysis and energy storage.