High-sensitivity stark spectroscopy obtained by surface plasmon resonance measurement.
High-sensitivity stark spectroscopy obtained by surface plasmon resonance measurement.
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DOI：
10.1021/ac000504f
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发表时间：
2000-09
影响因子：
7.4
通讯作者：
S. Wang;S. Boussaad;S. Wong;N. Tao
中科院分区：
文献类型：
--
作者：
S. Wang;S. Boussaad;S. Wong;N. Tao
通过测量表面等离子体共振（SPR）随激发SPR的入射光波长的变化，研究了外加电场对分子吸附物电子态的影响（斯塔克效应）。使用Kramers-Kronig关系，斯塔克光谱与传统方法获得的那些相比，提取电场诱导的SPR角位移的几个有机吸附物。由于这种方法依赖于检测可以精确测量的SPR角位移，因此可以实现高灵敏度的斯塔克光谱。此外，吸附物覆盖信息可以从分子吸附时的SPR角位移确定。
The effect (Stark effect) of an applied electric field on the electronic states of molecular adsorbates was studied by measuring surface plasmon resonance (SPR) as a function of the wavelength of the incident light that excites the SPR. Using the Kramers-Kronig relation, Stark spectra comparable to those obtained with conventional methods were extracted from the electric field-induced SPR angular shift for several organic adsorbates. Because this method relies on detecting the SPR angular shift that can be measured precisely, high-sensitivity Stark spectroscopy can be achieved. In addition, the adsorbate coverage information can be determined from the SPR angular shift upon molecular adsorption.