Abstract

Self-assembled monolayers (SAMs) derived of 4-methoxy-terphenyl-300,500-dimethanethiol (TPDMT) and 4-methoxyterphenyl-400-methanethiol (TPMT) have been prepared by chemisorption from solution onto gold thin films andnanoparticles. The SAMs have been characterized by spectroscopic ellipsometry, Raman spectroscopy and atomic forcemicroscopy to determine their optical properties, namely the refractive index and extinction coefficient, in an extendedspectral range of 0.75-6.5 eV. From the analysis of the optical data, information on SAMs structural organization hasbeen inferred. Comparison of SAMs generated from the above aromatic thiols to well-known SAMs generated from thealkanethiol dodecanethiol revealed that the former aromatic SAMs are densely packed and highly vertically oriented,with a slightly higher packing density and a absence of molecular inclination in TPMT/Au. The thermal behaviorof SAMs has also been monitored using ellipsometry in the temperature range 25-500
C. Gold nanoparticlesfunctionalized by the same aromatic thiols have also been discussed for surface enhanced Raman spectroscopyapplications. This study represents a step forward tailoring the optical and thermal behavior of surfaces as well asnanoparticles.

Autore Pugliese

• Hassan Omar Omar , Bianco Giuseppe Valerio

Tutti gli autori

• Bruno G.; Babudri F.; Operamolla A.; Bianco G. V.; Losurdo M.; Giangregorio M. M.; Hassan Omar O.; Mavelli F.; Farinola G. M.; Capezzuto P.; Naso F.

Titolo volume/Rivista

Langmuir

Anno di pubblicazione

2010

ISSN

0743-7463

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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