Electronic Supplementary Information (ESI) for:
A study of aminothiophenol and aminothiophenol-C60 self-assembled
monolayers by SERS
G. Delafossea,c,d, A. Merlena,b*, S. Claira,c, L. Patronea,c,d,,
a
CNRS, IM2NP (UMR 7334)
b
Université du Sud Toulon-Var, IM2NP, Bâtiment R, BP 132, F-83957 La Garde Cedex,
France
Aix-Marseille Université, IM2NP, Campus de Saint-Jérôme – Case 142, F-13397 Marseille
Cedex 20, France
c
Institut Supérieur de l’Electronique et du Numérique, IM2NP, Maison des Technologies,
Place Georges Pompidou, F-83000 Toulon, France
d
* Electronic address: merlen@univ-tln.fr
Figure S1: AFM picture of a nanostructured gold surface prepared for SERS measurements.
Roughness is 7.3 nm RMS, grains are 20-25 nm high and 50-60 nm wide.
Figure S2: SERS spectra of the ATP layer before (red) and after (black) C60 adsorption. Both
spectra were recorded in the same experimental conditions.
Figure S3: SERS spectra of the ATP layer before (red) and after (black) high temperature
treatment in an incubator. Both spectra were recorded in the same experimental conditions.
Figure S4: UV-Visible optical absorption (1-Transmission) in the 200 - 300 nm (left) and
400 – 800 nm (right) range of the bare gold evaporated substrate (Gold substrate), the
ATP layer (ATP SAM), the ATP layer annealed in toluene (ATP SAM heated in toluene)
and the ATP and C60 layers (ATP+C60 SAM). All those samples were prepared on a fused
silica substrate. The presence of metallic nanostructures is evidenced by a broad band
centred at around 700 nm, associated to localised surface plasmon resonance. After C60
adsorption, an additional absorption band is observed at 220 nm. It can be associated to
C60 molecules, which usually show strong absorption in the UV region. The precise
position of these bands may depend on the interaction between this molecule and its
chemical environment (solvent, surface…), i.e., mainly the ATP SAM in our case. An
additional absorption band is also observed at 270 nm, probably associated to gold
transition.