Zhao Jun-wu, Wang Yong-chang, Zhu Jian
Institute of Modern Physics, School of Science, Xi'an Jiaotong University, Xi'an 710049, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Dec;24(12):1609-11.
Gold colloid was prepared via electrochemical method. Nanostructured gold thin-films were deposited on glass by using self-assembled technique. UV-visible spectra and fluorescence emission spectra were measured at room temperature. The absorption spectrum features show two peaks and the longer wavelength one at 610 nm corresponds to linear aggregated gold nanochains. The fluorescence emission peaks at about 375 nm and 700 nm are due to the local field enhancement via coupling to the transverse and longitudinal surface plasmon resonance from gold nanochains. Both the intensity and number of the fluorescence emission peaks increase with increasing excited light and the layers number. It is indicated that the nanostructured gold thin-films formed a disordered particles system. Further more, multiple scattering takes place in these self-organized random micro-cavities.
通过电化学方法制备了金胶体。采用自组装技术在玻璃上沉积了纳米结构的金薄膜。在室温下测量了紫外可见光谱和荧光发射光谱。吸收光谱特征显示有两个峰，610nm处较长波长的峰对应于线性聚集的金纳米链。约375nm和700nm处的荧光发射峰是由于与金纳米链的横向和纵向表面等离子体共振耦合导致的局部场增强。荧光发射峰的强度和数量均随着激发光和层数的增加而增加。这表明纳米结构的金薄膜形成了一个无序粒子系统。此外，在这些自组织的随机微腔中发生了多次散射。
