Reversible Temperature Dependence in Surface-Enhanced Raman Scattering of 1-Propanethiol Adsorbed on a Silver Island Film
Reversible Temperature Dependence in Surface-Enhanced Raman Scattering of 1-Propanethiol Adsorbed on a Silver Island Film
复制标题
银岛膜上吸附的 1-丙硫醇表面增强拉曼散射的可逆温度依赖性
DOI：
10.1021/jp981820p
复制
发表时间：
1998
影响因子：
3.3
通讯作者：
M. Kim
中科院分区：
文献类型：
--
作者：
Yoonsoo Pang;H. Hwang;M. Kim
在15−300K温度范围内，测量了1-丙硫醇吸附在银膜上的表面增强拉曼散射强度。观察到表面增强拉曼散射强度随温度的可逆变化，15K时的强度比300K时的强度大∼3倍。影响表面增强拉曼散射强度的各种因素，如激光诱导的表面形貌变化、吸附和脱附以及吸附原子的破坏等，都可以作为观察到的温度依赖性的可能原因而被消除。基于Gersten和Nitzan提出的SERS电磁(EM)模型，计算了实验温度范围内的拉曼强度增强。结果表明，用EM模型计算可以定性地解释观测到的温度依赖关系。
Intensity of the surface-enhanced Raman scattering (SERS) of 1-propanethiol adsorbed on a silver film prepared chemically has been measured over the 15−300 K surface temperature range. A reversible change in the SERS intensity with the temperature has been observed, with the intensity at 15 K being larger than that at 300 K by a factor of ∼3. Various factors that can affect the SERS intensity such as the laser-induced change in surface morphology, adsorption and desorption, and destruction of adatoms could be eliminated as a possible cause for the observed temperature dependence. Enhancement of the Raman intensity has been calculated over the experimental temperature range based on the electromagnetic (EM) model for SERS proposed by Gersten and Nitzan. It has been found that the observed temperature dependence can be explained qualitatively with the EM model calculation.