CAJ | 학술논문

采用硝酸诱导的晶种法制备金单晶纳米带,利用TEM、HRTEM和UV-vis技术对产物进行形貌、结构表征和吸收性能分析.发现产物的形态有纳米带、纳米片和纳米颗粒,但以纳米带为主.纳米带为面心立方结构金单晶.UV-vis显示,产物的微弱吸收峰位于550 nm和强吸收峰位于975 nm,分别起源于纳米带横轴直径与长度方向的表面等离子体共振.金纳米带的生长机制进是,小尺寸纳米片在硝酸诱导作用下通过表面偶极作用进行自组装.
채용초산유도적정충법제비금단정납미대,이용TEM、HRTEM화UV-vis기술대산물진행형모、결구표정화흡수성능분석.발현산물적형태유납미대、납미편화납미과립,단이납미대위주.납미대위면심립방결구금단정.UV-vis현시,산물적미약흡수봉위우550 nm화강흡수봉위우975 nm,분별기원우납미대횡축직경여장도방향적표면등리자체공진.금납미대적생장궤제진시,소척촌납미편재초산유도작용하통과표면우겁작용진행자조장.
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～75 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.