Tip enhanced Raman spectroscopy on azobenzene thiol self-assembledmonolayers on Au(111)

Gennaro Picardi (1) , Marc Chaigneau (1) , Razvigor Ossikovski (1) , Christophe Licitra (2) , G. Delapierre (3)

1 LPICM - Laboratoire de physique des interfaces et des couches minces [Palaiseau]
2 MINATEC 17
3 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

Tip enhanced Raman spectroscopy (TERS) and imaging experiments in tunnelling (gap) mode were performed on a 2 nm thick azobenzene thiol monolayer grafted on Au(111). A strong dependence on the tunnelling parameters, regulating the gold tip-gold surface gap distance,was observed for the intensity of the enhanced Raman signal. The influence of the incident light polarization is also discussed.

Keywords: tip enhanced Raman spectroscopy; scanning tunnelling microscopy; azobenzene; thiol; polarization

Domains: Chemical Sciences; Theoretical and/or physical chemistry

Gennaro Picardi, Marc Chaigneau, Razvigor Ossikovski, Christophe Licitra, G. Delapierre. Tip enhanced Raman spectroscopy on azobenzene thiol self-assembledmonolayers on Au(111). Journal of Raman Spectroscopy, 2009, 40, pp.1407-1412. ⟨10.1002/jrs.2362⟩. ⟨hal-00838029⟩