Surface enhanced raman scattering of aromatic thiols adsorbed on nanostructured gold surfaces

• Autorzy: Mamdouh Abdelsalam
• Języki publikacji: EN

Abstrakty

EN

In this paper we describe the use of a simple and versatile technique of templated electrodeposition through polystyrene sphere templates to produce nanostructured films of gold with regular submicron spherical holes arranged in a hexagonal close-packed structure. The templates were produced by self assembly of a monodispersed suspension of polystyrene spheres on gold substrates using capillary forces. The self assembly process was modified through the chemical modification of the gold substrate with cysteamine thiol. Films of gold were prepared by electrochemical deposition through the template. The electrochemical deposition charge and the current time curve were used to control the film height with a precision of approximately 10 nm. The colour of the nanostructured films changed as the film thickness was changed. Surface enhanced Raman Scattering spectra were recorded and used to identify very low concentrations of aromatic thiol molecules, 4-Nitrobenzenethiol (4-NBT) and 4-Aminobenzenethiol (4-ABT), adsorbed on the surface of the nanostructured gold substrates. [...]

Słowa kluczowe

EN

Templated electrodeposition; Nanostructured gold; SERS, 4-Nitrobenzenethiol; 4-Aminobenzenethiol

• Czasopismo: Open Chemistry
• Rocznik: 2009
• Tom: 7
• Numer: 3
• Strony: 446-453

Daty

wydano

2009-09-01

online

2009-06-21

Twórcy

autor

Mamdouh Abdelsalam

• Department of Chemistry, Faculty of Science, Tanta University, 31527, Tanta, Egypt,

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Identyfikatory

DOI

10.2478/s11532-009-0032-0