Dissociation and Charge Transfer of H2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy
Dissociation and Charge Transfer of H2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy
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使用离子散射光谱实时探测 Cu(110) 上 H2O 的解离和电荷转移
DOI：
10.1021/acs.langmuir.6b03516
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Xiemng Chen
中科院分区：
文献类型：
--
作者：
Lin Chen;Jianjie Lu;Pinyang Liu;Lei Gao;Yuefeng Liu;Feifei Xiong;Shunli Qiu;Xiyu Qiu;Yanling Guo;Xiemng Chen
水-Cu（110）相互作用在石墨烯基器件的常规使用期间特别重要。在这项工作中，水的吸附，解离和解吸在高温下已经很好地研究了使用飞行时间离子散射技术。结果表明，在室温下，水的吸附符合一级Langmuir吸附模型。测定了表面残余氧氢比随温度的变化规律，深刻揭示了表面组成的动态过程。此外，在表面的电子性质的变化已被探测通过测量负离子分数作为退火温度的函数的快速离子散射。这表明电荷转移是研究真实的电子过程的一种非常灵敏的方法。
Water–Cu(110) interaction is of particular importance during the routine use of graphene-based devices. In this work, water adsorption, dissociation, and desorption at elevated temperatures have been well studied using the time-of-flight ion scattering technique. It is found that water adsorption meets the first-order Langmuir adsorption model at room temperature. The variation of the ratio between residual O and H on the surface with temperature has been well determined, which profoundly reveals the dynamical process of surface composition. Furthermore, the change in the surface electronic properties has been probed by measuring negative-ion fractions as a function of the annealing temperature for fast ion scattering. It suggests that charge transfer is a very sensitive method for studying specific electronic processes in real time.