Shape-Controlled Synthesis of Gold Nanoplates and Their Self-Assembly by Repulsive Electrostatic Interactions
This study focuses on understanding the growth and control of the gold nanoplates by seed-mediated growthapproach. These monodispersive size-controlled gold nanoplates have the average thickness of 8-10 nm andaverage size tunable from 70 to 150 nm, exhibiting strong surface plasmon absorption in the near infrared (NIR)region. For the gold nanoplates formation, the seeds serve as nucleation sites, ascorbic acid (AA) serves as anew reductant to reduce hydrogen tetrachloroaurate (HAuCl4), surface activity systemcetyltrimethylammonium bromide (CTAB) and potassium iodide (KI) are critical factors. X-ray diffraction(XRD) and selected-area electron diffraction (SAED) analyses reveal that gold nanoplates with the (111) latticeplane as the basal plane are single crystals. CTAB are absorbed on the surface of the (111) lattice plane of thesingle crystals, accounting for self-assembled monolayer and head-to-head arrays. The two arrays have beenshown to serve as effective surface-enhanced Raman scattering substrates using Niel blue A (NBA) sulfate asRaman report molecule.
Gold nanoplates, Surface plasmon resonance, Surface-enhanced Raman spectroscopy, Repulsiveelectrostatic interactions, Self-assembly.
Liyan Bi Yanying Rao Qian Sun Danyang Li Yuan Cheng Jian Dong Weiping Qian
State Key Laboratory of Bioelectronics,School of Biological Science and Medical Engineering,Southeast University,Nanjing 210096,China
国内会议
2012上海市研究生学术论坛暨第三届上海交通大学医(理)工研究生学术论坛
上海
英文
1-21
2012-08-15（万方平台首次上网日期，不代表论文的发表时间）