Influence of the roughness of metal templates on surface enhanced Raman scattering

Manuel R. Gonçalves; Othmar Marti

doi:10.1117/12.854283

10 May 2010 Influence of the roughness of metal templates on surface enhanced Raman scattering

Manuel R. Gonçalves, Othmar Marti

Proceedings Volume 7712, Nanophotonics III; 77120L (2010) https://doi.org/10.1117/12.854283
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Surface enhanced Raman scattering (SERS) has been extensively investigated for rough metal surfaces fabricated by chemical etching and particles fabricated by different methods of nanolithography. Surface roughness is assumed to be necessary for SERS. Sharp edges of nanoparticles are desired for near-field enhancements and, consequently, contribute to the enhanced Raman effect. However, high porosity and roughness decreases the optical near-field strength due to losses by radiation. Arrays of nanoparticles fabricated by nanosphere lithography, are able to generate strong near-fields and do not have reduced roughness. Despite its advantages this fabrication method has an undesired effect: contaminant carbonaceous species attached to the nanoparticles generate strong Raman spectra and prevent their use for other molecules. We have investigated the effect of the particle roughness and preparation method on the characteristics of SERS spectra and how the contamination can be avoided. Samples were prepared by nanosphere lithography and using silver and gold nanoparticles in solution. Dye molecules and alkanethiols were used to decorate the nanoparticles in order to obtain enhanced Raman scattering. SERS spectra were acquired using a scanning confocal Raman microscope. Concentrated solution of alkanethiols reduce or remove completely the SERS spectra typical of the contaminants.

Citation Download Citation

Manuel R. Gonçalves and Othmar Marti "Influence of the roughness of metal templates on surface enhanced Raman scattering", Proc. SPIE 7712, Nanophotonics III, 77120L (10 May 2010); https://doi.org/10.1117/12.854283

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Particles

Raman spectroscopy

Silver

Molecules

Surface enhanced Raman spectroscopy

Optical spheres

Gold

Show All Keywords

Keywords/Phrases

Search In:

Publication Years