【摘要】 采用静电自组装技术制备了金纳米粒子薄膜,研究了薄膜的表面增强拉曼散射(SERS)活性。自组装金纳米粒子薄膜具有明显的SERS效应,其中2双层薄膜的增强效应最强。金纳米粒子相互靠近但又不至于连通的状态具有最强的增强效果。若金纳米粒子通过点、面接触形成连通网络,将导致入射光激发表面等离子体波的机率下低,使增强效果降低。更多还原

【Abstract】 Multilayer films of gold nanoparticles were prepared via electrostatic self-assembly approach and characterized by surface-enhanced Raman scattering (SERS). The self-assembled multilayer films of gold particles exhibited an SERS-effect, and the 2-bilayer films were of the strongest SERS-activity. If the gold particles within the films are close enough but not directly contact, the films will exhibit a strong SERS-effect. However, if the particles contact each other and conducting networks form within the films, the possibility of surface plasmon resonance will be lowed and the SERS-effect of the films will become poor.更多还原