Observation and control of ultrafast surface photochemistry

超快表面光化学的观测与控制

• 批准号: EP/D068673/1
• 负责人: Wendy Brown
• 金额: $ 80.96万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD068673%2F1
• 关键词: Observation; control; ultrafast; surface; photochemistry

The ultimate goal of any branch of Chemistry, including surface Chemistry, is to understand reactions at a fundamental level. In order to achieve this, it is necessary to both observe the reaction on an atomic length scale, and also to monitor the reaction on the same time scale as bond breaking and making - the femtosecond timescale (1 fs = 10-15 s). With the advent of scanning probe microscopy, the observation of surface reactions at the atomic length scale has become almost routine. However, observing the dynamics of surface reactions with femtosecond accuracy still remains a considerable challenge. This proposal will address this issue. It aims to establish the foundations for understanding the detailed dynamics of surface processes, by using state-of-the-art femtosecond pump-probe techniques to monitor reactions in real time. It will also investigate the possibility, long discussed theoretically but not yet achieved experimentally, of using shaped femtosecond laser pulses to control surface photochemistry. If this control technique is successful it will have a huge impact and will contribute greatly to our understanding of surface reaction processes. The programme of research will be made possible by bringing together two independent well-established research groups within the UCL Chemistry department to form a unique team with the necessary experimental expertise in both surface science and ultrafast laser technology.

化学的任何分支的最终目标，包括表面化学，是了解反应的基本水平。为了实现这一点，有必要既在原子长度尺度上观察反应，又在与键断裂和键形成相同的时间尺度上监测反应-飞秒时间尺度（1 fs = 10-15 s）。随着扫描探针显微镜的出现，在原子长度尺度上观察表面反应几乎已成为常规。然而，以飞秒精度观察表面反应的动力学仍然是一个相当大的挑战。该提案将解决这个问题。它的目的是建立基础，了解详细的表面过程的动力学，通过使用国家的最先进的飞秒泵浦探测技术，以监测反应在真实的时间。它也将调查的可能性，长期讨论的理论上，但尚未实现的实验，使用成形飞秒激光脉冲来控制表面光化学。如果这种控制技术成功，它将产生巨大的影响，并将大大有助于我们对表面反应过程的理解。该研究计划将通过将UCL化学系内两个独立的成熟研究小组聚集在一起，形成一个独特的团队，在表面科学和超快激光技术方面具有必要的实验专业知识。

项目成果

A RAIRS, TPD and femtosecond laser-induced desorption study of CO, NO and coadsorbed CO + NO on Pd(111)

• DOI: 10.1039/c6ra13722a
• 发表时间: 2016-07
• 期刊: RSC Advances
• 影响因子: 3.9
• 作者: J. Butorac;Emma Wilson;H. Fielding;W. A. Brown;R. Minns

State Selective Dynamics of TiO2 Charge Carrier Trapping and Recombination

TiO2 载流子捕获和复合的态选择动力学

• DOI: 10.26434/chemrxiv.8574416
• 发表时间: 2019
• 作者: Thornton G

Coverage-dependent two-photon photoexcitation at the H2O/TiO2 interface

• DOI: 10.1016/j.susc.2016.02.018
• 发表时间: 2016-10-01
• 期刊: SURFACE SCIENCE
• 影响因子: 1.9
• 作者: Payne, D. T.;Zhang, Y.;Thornton, G.
• 通讯作者: Thornton, G.

Zero Threshold for Water Adsorption on MAPbBr3.

• DOI: 10.1002/smll.202301014
• 发表时间: 2023-06
• 期刊: Small
• 影响因子: 13.3
• 作者: Robert McDougall Kerr;Thomas J. Macdonald;Alex J. Tanner;Jiangdong Yu;Julia A Davies;H. Fielding;G. Thornton