<br/>Combining the spatial resolution of Scanning probe methods with the chemical specificity of Raman spectroscopy, Tip Enhaced Raman Spectroscopy (TERS) is a powerful method to map and unambiguously observe molecular changes at single molecule levels. Previously restricted to UHV conditions, the restraints on TERS have been progressively loosened, leading to ambient TERS imaging and, more recently, the combination of TERS with electrochemistry. Indeed, control over the potential of the sample and the tip provide a convenient way to trigger reactions to be observed by TERS.<br/><br/>Previously, our group has demonstrated that the electrochemistry of molecules both on the sample and on the tip can be accessed independently. Now, we focus on the possibility of manipulating and observing molecules individually. By tuning the bias between the sample and the tip, we show that Cobalt Phthalocyanine (Co-Pc) molecules can be controllably transferred from a gold monocrystal to the tip, sometimes reversibly. Owing to the unique sensitiveness of Tip- and Surface Enhanced Raman Spectroscopies, we monitor the whole process in operando, using a combination of EC-TERS and Tip Voltammetry.

Electrochemical tip enhanced Raman spectroscopy (EC-TERS): An asset for observation of molecular-scale manipulation

2019 Spring National Meeting

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