@phdthesis{oai:sucra.repo.nii.ac.jp:00018682, author = {YANG, BO}, month = {}, note = {87 p., Chapter 1………………………………………………………………1 General introduction…………………………………………………………………1 1.1 Outline of the thesis…………………………………………………………1 1.2 Au tip……………………………………………………3 1.3 Au(111) substrate……………………………………………………………4 1.4 Dimethyl disulfide………………………………………………………………6 1.5 Interactions at molecular level……………………7 1.5.1 Intermolecular interactions…………………………………7 1.5.2 Intramolecular interactions…………………………………8 1.5.3 Interactions on metal surface…………………………9 1.6 References……………………………………………………9 Chapter 2………………………………………………………………13 Methodologies………………………………………………………………………13 2.1 Electrochemical etching…………………………………………………………13 2.2 Experimental parameters…………………………………………………………17 2.2.1 Applied potential……………………………………………………………17 2.2.2 Electrolyte………………………………………………………………18 2.2.3 Electrode system……………………………………………………………21 2.2.4 Other parameters……………………………………………………………21 2.3 Scanning Tunneling Microscopy (STM)………………………………24 2.3.1 Theory and working principle of STM……………………………24 2.3.2 Instrumentation of STM……………………………………………………30 2.4 References………………………………………………………………………32 Chapter 3………………………………………………………………………………………35 Fabrication of Au tips by three-electrode electrochemical etching method……………35 3.1 Introduction…………………………………………………………………35 3.1.1 Background and motivation……………………………………………….36 3.1.2 Fabrication methods…………………………………………………………37 3.1.3 Problems of conventional electrochemical method…………………………39 3.1.4 Goals………………………………………………………………………41 3.2 Materials and experimental set-up………………………………………………41 3.2.1 Materials…………………………………………………………………41 3.2.2 Experimental set-up………………………………………………………41 3.3 Results and discussion………………………………………………………42 3.3.1 Cyclic voltammetry (CV) measurement…………………………………42 3.3.2 Current-etching time (I-t) measurement……………………………………47 3.3.3 Scanning electron microscope (SEM)……………………………………51 3.3.4 Radius (R) and cone angle (θ)…………………………………………58 3.3.5 Linear sweep voltammetry (LSV) measurement………………………61 3.4 Conclusions……………………………………………………………………65 3.5 References……………………………………………………………………66 Chapter 4………………………………………………………………69 Single molecular STM studies…………………………………………………69 4.1 Introduction………………………………………………………………69 4.2 Experimental……………………………………………………………………74 4.2.1 Plasmon-induced reaction of a single DMDS molecule……………………74 4.2.2 Tunnel electron-induced reaction of a single DMDS molecule……………75 4.3 Results and Discussion…………………………………………………………75 4.4 Conclusions………………………………………………………………………82 4.5 References……………………………………………………………………82 Chapter 5………………………………………………………………85 Conclusion and outlooks………………………………………………………………85 Publication list……………………………………………………………………85 Academic activities……………………………………………………………………86 Acknowledgements………………………………………………………………87, 指導教員 : 金有洙, text, application/pdf}, school = {埼玉大学}, title = {Development of an electrochemical fabrication method of Au tips for STM studies}, year = {2018}, yomi = {ヤン, ボ} }