Exchange Kinetics of Alkanethiol Self-Assembled Monolayers Probed by Attenuated Total Reflection with Enhancement of Surface Plasmon Resonance
Exchange Kinetics of Alkanethiol Self-Assembled Monolayers Probed by Attenuated Total Reflection with Enhancement of Surface Plasmon Resonance
复制标题
通过衰减全反射和增强表面等离子共振探测烷硫醇自组装单分子层的交换动力学
DOI：
10.1143/jjap.36.l1116
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发表时间：
1997
影响因子：
1.5
通讯作者：
Wolfgang Knoll Wolfgang Knoll
中科院分区：
文献类型：
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作者：
K. Kajikawa;M. Hara;Hiroyuki Sasabe Hiroyuki Sasabe;Wolfgang Knoll Wolfgang Knoll
采用表面等离子体共振（SPR）增强的衰减全反射（ATR）技术，研究了十八烷基正辛烷（C18 H37 SH）与C8 H17 SH自组装膜（SAMs）的交换动力学.虽然发现通过暴露于乙醇溶液1天制备的辛乙撑SAM具有快速交换动力学，但通过暴露30分钟制备的辛乙撑SAM仅表现出缓慢的交换动力学。这一事实可能源于不同的吸附状态，这是由于辛烷硫醇单体在暴露于溶液期间逐渐二聚化，二聚体的吸附强度低于单体。
Exchange kinetics for octanethiol ( C8H17SH) self-assembled monolayers (SAMs) by octadecanethiol ( C18H37SH) in solution are studied by in situ measurements of reflectivity in the attenuated total reflection (ATR) geometry with surface plasmon resonance (SPR) enhancement. While rapid exchange kinetics are found for the octanethiol SAM prepared by 1-day exposure to the ethanol solution, the octanethiol SAM prepared by 30-minute exposure exhibits only slow exchange kinetics. This fact may originate from different adsorption states, due to the gradual dimerization of the octanethiol monomers during their exposure to the solution, with dimers being less strongly adsorbed than the monomers.