Abstract

* * * ## Title, Contents and abstract * * * 1 Introduction 6 2 Fundamentals 14 2.1 Raman spectroscopy 14 2.2 Surface enhanced Raman spectroscopy 16 2.3 Tip enhanced Raman spectroscopy 25 2.4 Scanning tunneling microscopy 35 2.5 Light emission from tunneling junctions 37 3 Experimental 46 3.1 The set-up 46 3.2 The optics 48 3.3 Film preparation 49 3.4 Tip preparation 51 3.5 Chemicals and reagents 55 3.6 Optics for STM-emitted light detection 56 4 Tip Enhanced Raman Spectroscopy 60 4.1 Brilliant Cresyl Blue 60 4.2 Cyanide 73 4.3 Overview on literature data concerning TERS 85 4.4 Carbon fluctations 87 5 STM light emission 96 5.1 Gold-gold junctions 96 6 Conclusions 113 References 118 Ringraziamenti 129

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