Wang Chungang, Chen Ying, Ma Zhanfang, Wang Tingting, Su Zhongmin
Department of Chemistry, Northeast Normal University, Changchun 130024, PR China.
J Nanosci Nanotechnol. 2008 Nov;8(11):5887-95. doi: 10.1166/jnn.2008.222.
A universal and facile approach for the self-assembly of surfactant-coated anisotropic metal nanoparticles on the amino-functionalized planar and spherical surfaces based on electrostatic attraction has been explored. Large-scale and different surface coverage of monolayer film and metallodielectric core-shell nanostructures of anisotropic metal nanoparticles, including Au nanorods, Au(core)Ag(shell) nanorods and Ag nanoprisms, have been fabricated. The optical response in the visible and the near infrared (NIR) of resulting nanostructures can be easily controlled by varying the concentration of the anisotropic nanoparticle, the amount of silica particles, and the immersion time of the substrates. Large-scale anisotropic metal nanoparticle monolayer films with subtle control over the surface coverage and tunable plasmon resonance as surface-enhanced Raman spectroscopy (SERS) substrates for probing 4-aminothiophenol were investigated, which exhibited high SERS activity, stability and reproducibility.
基于静电引力，探索了一种在氨基功能化平面和球形表面上自组装表面活性剂包覆的各向异性金属纳米粒子的通用且简便的方法。已制备出大规模、不同表面覆盖率的单层膜以及各向异性金属纳米粒子的金属介电核壳纳米结构，包括金纳米棒、金（核）银（壳）纳米棒和银纳米棱镜。通过改变各向异性纳米粒子的浓度、二氧化硅粒子的量以及基底的浸泡时间，可以轻松控制所得纳米结构在可见光和近红外（NIR）区域的光学响应。研究了作为用于探测4-氨基硫酚的表面增强拉曼光谱（SERS）基底的、对表面覆盖率有精细控制且具有可调谐等离子体共振的大规模各向异性金属纳米粒子单层膜，其表现出高SERS活性、稳定性和重现性。
