Terahertz spectroscopy is broadly applicable for the study of a wide variety of materials, but spectroelectrochemistry has not been performed in the THz range because of the lack of a THz-transparent electrochemical cell. While THz-transparent electrodes do exist, they have never been utilized in a complete three-electrode cell, which is the configuration required for accurate potential control in aqueous media. We have designed and constructed a THz-transparent three-electrode electrochemical cell and have performed THz spectroelectrochemistry of a SnO₂ thin film. The cell utilizes a custom-made reference electrode and tubing which allows the composition of electrolyte to be changed during an experiment. THz spectroelectrochemical measurements show a decrease in THz transmission at potentials where SnO₂ conduction band states are potentiostatically filled. We also describe a simple method for measuring the uncompensated resistance and RC time constant.

中文翻译：

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用于原位太赫兹光谱电化学的太赫兹透明电化学电池

太赫兹光谱法广泛适用于各种材料的研究，但是由于缺乏太赫兹透明的电化学电池，因此未在太赫兹范围内进行光谱电化学。尽管确实存在THz透明电极，但它们从未在完整的三电极电池中使用过，这是在水性介质中进行精确电势控制所需的配置。我们设计并构建了THz透明的三电极电化学电池，并对SnO ₂薄膜进行了THz光谱电化学。该电池利用定制的参比电极和管道，可以在实验过程中改变电解质的成分。太赫兹光谱电化学测量显示在SnO电位下太赫兹透射率降低_2个导带状态被恒电位填充。我们还描述了一种用于测量未补偿电阻和RC时间常数的简单方法。