Related Experiment Video
Updated: Mar 21, 2026

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation
Published on: October 30, 2012
Compact ultrahigh vacuum/high-pressure system for broadband infrared sum frequency generation vibrational
Shuo Liu1, An-An Liu1, Ruidan Zhang1
1International Center for Quantum Materials (ICQM) and School of Physics, Peking University, Beijing 100871, People's Republic of China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, People's Republic of China.
Abstract:
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.
Related Concept Videos
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
Atomic Absorption Spectroscopy: Instrumentation
The atomizer used in AAS can be either a flame atomizer or an...
UV–Vis Spectrometers
IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Atomic Absorption Spectroscopy: Atomization Methods
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...

