报告人:Prof.Hua Zhang, City University of Hong Kong
会议ID：913 725 259，
Abstract:In this talk, I will summarize the recent researches on phase engineering of nanomaterials (PEN) in my group. In particular, we focus on the rational design and synthesis of novel nanomaterials with unconventional phases for various promising applications. For example, by using wet-chemical methods, for the first time, we have successfully prepared novel Au nanostructures (e.g., the hexagonal-close packed (hcp) Au nanosheets, 4H hexagonal Au nanoribbons, and crystal-phase heterostructured 4H/fccandfcc/2H/fccAu nanorods), epitaxially grown metal nanostructures with unconventional crystal phases on the aforementioned Au nanostructures, and amorphous/crystalline hetero-phase Pd and PdCu nanosheets. In addition, by using gas-solid reactions, metastable 1T'-phase group VI transition metal dichalcogenides (TMDs),e.g., WS2, WSe2, MoS2, MoSe2, WS2xSe2(1-x)and MoS2xSe2(1-x), have been prepared. Moreover, the phase transformation of TMDs during our developed electrochemical Li-intercalation process has also be observed. Impressively, the lithiation-induced amorphization of Pd3P2S8has been achieved. Currently, my group focuses on the investigation of phase-dependent physicochemical properties and applications in catalysis,(opto-)electronic devices,clean energy, chemical and biosensing, surface enhanced Raman scattering, waveguide, photothermal therapy,etc., which we believe is quite unique and very important not only in fundamental studies, but also in future practical applications. Importantly, the concepts of phase engineering of nanomaterials (PEN), crystal-phase heterostructures, and hetero-phase nanomaterials are proposed.
Prof. Hua Zhang obtained his BS and MS degrees at Nanjing University in 1992 and 1995, respectively, and completed his Ph.D. with Prof. Zhongfan Liu at Peking University in 1998. As a Postdoctoral Fellow, he joined Prof. Frans C. De Schryver’s group at Katholieke Universiteit Leuven (Belgium) in 1999, and then moved to Prof. Chad A. Mirkin’s group at Northwestern University in 2001. After working at NanoInk Inc. (USA) and the Institute of Bioengineering and Nanotechnology (Singapore), he joined Nanyang Technological University in July 2006. His current research interests focus on the synthesis of ultrathin 2D nanomaterials (e.g. metal nanosheets, graphene, metal dichalcogenides, metal–organic frame-works, covalent organic frameworks, etc.) and their hybrid composites for applications in nano- and biosensors, clean energy, (opto-) electronic devices, catalysis, and water remediation; as well as controlled synthesis, characteriza-tion, and application of novel metallic and semiconducting nanomaterials, and epitaxial growth of heterostructures. In recent years, Hua Zhang have published more than 420 papers in Science, Nat. Chem., Nat. Rev. Mater., Nat. Commun., Sci. Adv., Nat. Protocols, Chem. Rev., and many other top journals (cited more than 41,300 times).