中国科学院优秀博士学位文

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博士学位论文

利用双光子光电子能谱和扫描隧道显微镜研究TiO2(110)表面醇类光化学反应

作者姓名:马志博

指导教师:杨学明院士

中国科学院大连化学物理研究所

学位类别:理学博士

学科专业:物理化学

培养单位:中国科学院大连化学物理研究所

二0一二年十月

Studiesonalcohol/TiO2(110)systembytwo-photonphotoemissionspectroscopyandlow-temperaturescanningtunnelingmicroscope

By

ZhiboMa

ADissertationSubmittedto

GraduateUniversityofChineseAcademyofSciences

Inpartialfulfillmentoftherequirement

Forthedegreeof

DoctorofScience

StateKeyLaboratoryofMolecularReactionDynamics

DalianInstituteofChemicalPhysics,ChineseAcademyofSciences

October,2016

书脊

究表面醇类光化学反应

马志博

中科院大学 致谢

博士的六年,是我人生中最重要的一段时光,是青春岁月里最无悔的片段.在这六年里,我遇到了名师,结交了挚友,学习了知识,磨练了性格,相比当年那个初出校门的懵懂少年,回首这些年的收获,与身边的人对我的帮助是分不开的.

...

(签名位置)

2016年10月 摘 要

在表面科学中,常应用多种实验手段从不同角度对体系进行研究,其中光电子能谱和扫描隧道显微镜就是很重要的两种探测方式.本文作者在博士研究期间搭建了一台时间分辨的飞秒双光子光电子能谱装置(Two-PhotonPhotoemission,2PPE)以及一套低温扫描隧道显微镜装置(Low-TemperatureScanningTunnelingMicroscope),主要研究开展在醇类,水等小分子在金红石型二氧化钛(110)面的光化学动力学方面.

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关 键 词:xxx,xxx,xxx,xxx,xxx

ABSTRACT

Photoemissionspectroscopy(PES)andscanningtunnelingmicroscope(STM)aretwopowerfultechniqueorresearchingreactionsinsurfacescience.Inthisthesis,Webuiltatwo-photonphotoemissionspectroscopy(2PPE)andalow-temperaturescanningtunnelingmicroscope(LT-STM)forresearchingalcoholandwateronrutileTiO2(110).


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Keywords:xxx,xxx,xxx,xxx,xxx 目录

摘 要I

ABSTRACTII

1.引言1

1.1表面化学和表面分析技术的发展1

1.2TiO2表面光化学的研究背景3

2.时间分辨双光子光电子能谱装置7

2.1飞秒激光光源7

2.1.1Ti:Sapphire飞秒激光振荡器8

2.1.2倍频装置8

2.1.3Mach-Zehnder干涉仪10

2.1.4色散补偿13

2.1.5飞秒激光器放大器系统15

2.2超高真空腔体15

2.2.1超高真空的获得15

2.2.2真空腔体部件介绍17

2.3电子能量分析装置18

2.3.1角分辨双光子光电子能谱原理18

2.3.2半球能量分析器21

3.金红石型二氧化钛23

3.1金红石晶体的晶体结构23

3.2金红石晶体(110)晶面的电子谱能带结构24

3.3金红石TiO2(110)表面的STM结构26

3.4金红石TiO2(110)的制备和表征27

4.ROH/TiO2(110)体系的光催化解离研究30

4.1体系研究背景30

4.2实验方法介绍35

4.3CH3OH/TiO2(110)体系的双光子光电子能谱结果38

4.3.1CH3OH/TiO2(110)体系光电子能谱随光照时间的变化38

4.3.2CH3OH/TiO2(110)体系中的同位素效应44

4.3.3CH3OH/TiO2(110)体系中表面激发态的本质45

4.3.4CH3OH/TiO2(110)体系光解离效率与表面还原性的相关性50

4.3.5CH3OH/TiO2(110)体系光解离效率与激发光波长的相关性52

4.4不同激发光源下的光解离过程57

4.4.1飞秒激光放大器简介57

4.4.2放大器400nm,266nm光源激发下的反应性58

4.5乙醇在TiO2(110)表面的光化学研究62

5.扫描隧道显微学简介68

5.1扫描隧道显微镜68

5.1.1扫描隧道显微镜的发明,发展68

5.1.2扫描隧道显微镜的工作原理和实验方法69

5.2扫描隧道显微学基本原理70

5.2.1电子隧穿与一维隧穿模型70

5.2.2Bardeen微扰理论73

5.2.3Tersoff-Hamann近似75

6.低温扫描隧道显微镜实验装置78

6.1实验装置介绍79

6.1.1真空系统79

6.1.2扫描隧道显微镜腔体(LT腔体)79

6.1.3表面制备腔体83

6.1.4气体吸附装置84

6.2实验装置配套基础建设85

6.2.1防振土建85

6.2.2防振动电磁屏蔽间86

6.2.3设备接地及配电87

6.3实验数据87

7.总结和展望90

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作者简介及在学期间发表的学术论文与研究成果

作者简历:

xxx

已发表(或正式接受)的学术论文如下:

Xxx(本人姓名不加粗,加上下划线即可以)

致谢

摘 要

I

目录

利用双光子光电子能谱和扫描隧道显微镜研究TiO2(110)表面醇类光化学反应

IV

II

利用双光子光电子能谱和扫描隧道显微镜研究TiO2(110)表面醇类光化学反应

目录

III

利用双光子光电子能谱和扫描隧道显微镜研究TiO2(110)表面醇类光化学反应

1.引言

2

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