种子生长法合成金纳米棒综述总结.pptx

A Review of Au NanorodsLIU Chang(YNU)October 27th,20182The result of searching“Au nanorods”on Web of Science:Not exact but impressive！NameInstituteSupervisorCatherine J.MurphyUniversity of Illinois at Urbana-Champaign 伊利诺伊大学香槟分校（美国）Nikhil R.JanaHaldia Institute of Technologyia 霍尔迪亚理工学院（印度）Catherine J.MurphyPaul MulvaneyThe University of Melbourne 墨尔本大学（澳大利亚）Jorge Prez-JusteThe University of Melbourne 墨尔本大学（澳大利亚）Paul MulvaneyMostafa A.El-sayedGeorgia Institute of Technology 佐治亚理工学院（美国）Babak NikoobakhtNational Institute of Standards and Technology 美国国家标准与技术研究院Mostafa A.El-sayed341.Au NRs Plasmonics5（郑州大学朱笑天2017年硕士学位论文）LSPR:Local Surface Plasmonic Resonance520 nmHistory:Hard Template Method Soft Template Method Seed Growth Method 2.Synthesis of Au NRs6(100nm100-200m)(12nm60nm)(various)Problems:Energy Intensive Difficult to Scale Hard to ShapeSince 2001 by N.R.Jana7Hard Template Method8Seed Growth Method(3-Step)910113.Machanism of Au NR GrowthFor 3-step seed growth method,(A)CTAB is a capping agent rather than soft template;(B)Au(I)prefers to add at the tips due to a prevailing electric field effect.Adv.Funct.Mater.2004,14,5719 J.Phys.Chem.B.2005,109,138577012For Ag assistant growth method,Contradiction?13In situ characterizingTimeresolved UVvis absorbance spectroscopySmall angle X-ray scattering(SAXS)X-ray absorption spectroscopy(XANES)Liquid cell TEM,cryo-TEM,AFMThe Aun+depletion rate is very sensitive to pH near the pKa of AA;Ag+prevents Au NR from overgrowing;The reduction of Au happens on the surface of Au NR;14Thanks!