Compact ultrahigh vacuum/high-pressure system for broadband infrared sum frequency generation vibrational spectroscopy studies

被引：11

作者：

Liu, Shuo

Liu, An-an

Zhang, Ruidan

Ren, Zefeng ^{[1
]}

机构：

[1] Peking Univ, ICQM, Beijing 100871, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2016年 / 87卷 / 04期

基金：

中国国家自然科学基金;

关键词：

METHANOL PHOTOCHEMISTRY; SURFACE-STRUCTURE; CO ADSORPTION; TIO2(110); PT(111); WATER; TIO2; POLARIZATION; DISSOCIATION; NANOPARTICLES;

D O I：

10.1063/1.4945113

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have designed a compact ultrahigh vacuum/high-pressure system for in situ broadband infrared (IR) sum frequency generation vibrational spectroscopy (SFG-VS) studies. In this system, we have achieved a significant reduction in the distance between the sample and the optical window (<5 mm), which in turn considerably reduces the IR absorption from the gas phase under high pressure conditions. Moreover, with this new system, the IR transmission under high pressure conditions can be measured in situ for calibrating the SFG spectra. Therefore, this modified technique can allow us to study the vibrational spectra of adsorbates on single crystals or polycrystalline foils under high pressure. The preliminary results from SFG measurements of a model CH3OH/TiO2(110) system under both ultrahigh vacuum and high pressure conditions are reported here. These results suggest that this newly developed system is potentially a powerful tool for investigating adsorbate structures and surface reactions under both ultrahigh vacuum and real conditions. (C) 2016 AIP Publishing LLC.

引用

页数：5