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Provedor de dados:  ArchiMer
País:  France
Título:  Comparison of adhesion layers of gold on silicate glasses for SERS detection
Autores:  Colas, Florent
Barchiesi, D.
Kessentini, S.
Toury, T.
De La Chapelle, M. Lamy
Data:  2015-11
Ano:  2015
Palavras-chave:  Surface-enhanced raman scattering
Adhesion layer
Discrete dipole approximation
Resumo:  Gold is one of the most widely used metals for building up plasmonic devices. Although slightly less efficient than silver for producing sharp resonance, its chemical properties make it one of the best choices for designing sensors. Sticking gold on a silicate glass substrate requires an adhesion layer, whose effect has to be taken into account. Traditionally, metals (Cr or Ti) or dielectric materials (TiO2 or Cr2O3 ) are deposited between the glass and the nanoparticle. Recently, indium tin oxide and (3-mercaptopropyl)trimethoxysilane (MPTMS) were used as a new adhesion layer. The aim of this work is to compare these six adhesion layers for surface- enhanced Raman scattering sensors by numerical modeling. The near-field and the far-field optical responses of gold nanocylinders on the different adhesion layers are then calculated. It is shown that MPTMS leads to the highest field enhancement, slightly larger than other dielectric materials. We attributed this effect to the lower refractive index of MPTMS compared with the others.
Tipo:  Text
Idioma:  Inglês

Editor:  Iop Publishing Ltd
Formato:  application/pdf
Fonte:  Journal Of Optics (2040-8978) (Iop Publishing Ltd), 2015-11 , Vol. 17 , N. 11 , P. 1-7
Direitos:  2015 IOP Publishing Ltd Printed in the UK


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