Gold particle interaction in regular arrays probed by surface enhanced Raman scattering
Gold particle interaction in regular arrays probed by surface enhanced Raman scattering
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DOI：
10.1063/1.1676152
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发表时间：
2004-04-15
影响因子：
4.4
通讯作者：
Aussenegg, FR
中科院分区：
文献类型：
--
作者：
Félidj, N;Truong, SL;Aussenegg, FR
采用光刻技术在光滑的金膜上沉积金纳米粒子组成的二维阵列作为衬底，研究了反式-1，2-双(4-吡啶)乙烯分子的表面增强拉曼散射效应。这些阵列显示了两个等离子激元带，而不是相同的粒子阵列所观察到的单一等离子激元带，但沉积在镀铟锡氧化物玻璃上。在短波长范围内的激光激发不会产生任何SERS光谱，而在长波长范围内的激发会产生SERS光谱，每个分子的增益最高可达10(8)。同时研究具有不同形貌参数的阵列的消光和拉曼光谱，使我们能够对两个等离子体共振的发生和高拉曼增强提出解释。我们建议将短波长指定为在金玻璃界面上传播的等离子体波，而将长波长指定为空气/金表面等离子体波的粒子-粒子相互作用修正模式。(C)2004年美国物理研究所。
Lithographically designed two-dimensional arrays consisting of gold nanoparticles deposited on a smooth gold film are used as substrate to examine the SERS effect of the trans-1,2-bis (4-pyridyl) ethylene molecule. These arrays display two plasmon bands instead of the single one observed for the same arrays of particles but deposited on indium tin oxide coated glass. Laser excitation within the short wavelength band does not bring about any SERS spectrum, while excitation within the long wavelength band yields SERS spectra with a gain per molecule rising up to 10(8). The simultaneous investigation of extinction and Raman spectra of arrays exhibiting various topography parameters enables us to suggest an interpretation for both the occurrence of the two plasmon resonances and for the high Raman enhancement. We suggest to assign the short wavelength band to a plasmon wave propagating at the gold glass interface and the long wavelength one to an air/gold surface plasmon mode modified by particle-particle interaction. (C) 2004 American Institute of Physics.