Revisiting the physical processes of vapodeposited thin gold films on chemically modified glass by atomic force and surface plasmon microscopies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Année : 2009

Revisiting the physical processes of vapodeposited thin gold films on chemically modified glass by atomic force and surface plasmon microscopies

T. Roland
  • Fonction : Auteur
A. Khalil
  • Fonction : Auteur
A. Tanenbaum
  • Fonction : Auteur
L. Berguiga
J. Elezgaray
  • Fonction : Auteur
A. Arneodo
Françoise Argoul

Résumé

The preparation of very thin (at the scale of a few tens of nanometers) gold films by thermal evaporation and deposition on a solid substrate (glass) remains a key step for the elaboration of transparent and sensitive optical biosensors. We study the influence of the glass surface treatment and its thermal conductivity on the structure and composition of evaporated gold films. Using a combination of atomic force microscopy (AFM), high resolution surface plasmon resonance (SPR) imaging, and X-ray photoelectrom spectroscopy (XPS), we demonstrate that the grafting of a layer of long chain mercaptant, using 11-mercaptoundecyltrimethoxysilane (S xi Si), prior to gold deposition produces a drastic modification of gold inner and surface textures. A thorough investigation of AFM image topography by 2D wavelet-based segmentation method reveals the flat conical shape of the gold surface grains and their shape invariance with the glass surface chemical treatment. However, this treatment leads to a drastic decrease of the mean size and polydispersity of these grains by a factor of 2, thereby lowering the gold surface roughness. The rationale is that the combination of surface forces and thermal transfer drives the formation of homogeneous and flatter gold films. (C) 2009 Elsevier B.V. All rights reserved

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Dates et versions

hal-00445824 , version 1 (11-01-2010)

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T. Roland, A. Khalil, A. Tanenbaum, L. Berguiga, P. Delichere, et al.. Revisiting the physical processes of vapodeposited thin gold films on chemically modified glass by atomic force and surface plasmon microscopies. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2009, 603 (22), pp.3307-3320. ⟨10.1016/j.susc.2009.09.021⟩. ⟨hal-00445824⟩
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