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Nitric Acid Induced Seed-Mediated Growth of Gold Nanobelts and Their Spectroscopic Study

Song Yuzhe1,Dong Jiamin2,Liu Bin1,Wang Yunfu1,Li Xudong2,Liu Guohan1 (1.Institute of Sensor Technology,Gansu Academy of Sciences,Lanzhou 730000,China) (2.Lanzhou University of Technology,Lanzhou 730000,China)  
Gold single-crystal nanobelts were synthesized by a nitric-acid-induced seed-mediated growth method.The morphologies and structures of the products were characterized by TEM and HRTEM;the absorption property was analyzed by UV-vis spectrum.TEM observation shows that nanobelts are dominant morphology with perfect fcc single-crystal structure and there are some nanoplates and nanoparticles.The UV-vis spectra reveal a strong longitudinal surface plasma resonance(SPR) band and a weak transverse SPR band centered at ~975 nm and ~550 nm,respectively.The growth mechanism of the nanobelts is the self-assembly of the adjacent nanoplates through surface dipole-dipole interaction with nitric acid induction.
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