Cui, Xudong; Erni, Daniel; Zhang, Weihua; Zenobi, Renato:
Highly efficient nano-tips with metal-dielectric coatings for tip-enhanced spectroscopy applications
In: Chemical Physics Letters, Jg. 453 (2008), Heft 4/6, S. 262 - 265
2008Artikel/Aufsatz in Zeitschrift
Elektrotechnik
Damit verbunden: 1 Publikation(en)
Titel:
Highly efficient nano-tips with metal-dielectric coatings for tip-enhanced spectroscopy applications
Autor*in:
Cui, XudongUDE
LSF ID
49135
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Erni, DanielUDE
GND
1175897205
LSF ID
47126
ORCID
0000-0002-1467-6373ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Zhang, Weihua;Zenobi, Renato
Erscheinungsjahr:
2008

Abstract:

We studied how a protection layer influences the performance of an Ag-coated dielectric tip in tip-enhanced Raman spectroscopy using 3D simulations. Two typical chemically inert materials, Au and SiO2 were considered in this work. Neither of them introduces a significant shift of the resonance frequency; the field enhancement as well as the spatial resolution can also be preserved with a thin protective layer. Surprisingly, a 5 nm layer of SiO2 can even improve the field enhancement of the tip. This provides a new method to prevent Ag tips from undesired physical and chemical damages without losing their original performance for TERS.