Photocatalytic Reduction of an Azide-Terminated Self-Assembled
Monolayer Using CdS Quantum Dots
Chander Radhakrishnan
Michael K. F. Lo
Manoj V. Warrier
Miguel A. Garcia-Garibay
Harold G. Monbouquette
10.1021/la060035y.s001
https://acs.figshare.com/articles/journal_contribution/Photocatalytic_Reduction_of_an_Azide_Terminated_Self_Assembled_Monolayer_Using_CdS_Quantum_Dots/3221344
Ordered, tightly packed aryl-azide-terminated, self-assembled monolayers (SAMs) were created on gold substrates
from a new disulfide precursor. These monolayers were reduced at least partially in an aqueous environment using
∼2 nm CdS quantum dots (Qdots) as photocatalysts to give mixed monolayers of arylamine- and aryl azide-terminated
species. The CdS photocatalysts were made available for the reaction by exposure of the azide-terminated SAM to
Qdots initially in solution or by preadsorption of the CdS nanoparticles on the SAM. In either case, X-ray photoelectron
spectroscopy (XPS), grazing angle Fourier transform infrared spectroscopy (FTIR), and contact angle measurements
were used to show the occurrence of the photocatalytic reduction. As further evidence for the presence of arylamine-terminated thiolate in the reduced SAM, these arylamine groups were successfully tagged with fluorescein isothiocyanate
(FITC). The use of Qdot photocatalysts to functionalize surfaces may lead to a means to pattern surfaces at the
nanoscale.
2006-05-23 00:00:00
Qdot photocatalysts
Photocatalytic Reduction
FTIR
functionalize surfaces
gold substrates
spectroscopy
arylamine groups
CdS photocatalysts
SAM
angle Fourier
CdS nanoparticles
FITC
CdS Quantum Dots
contact angle measurements
photocatalytic reduction
XPS
fluorescein isothiocyanate
monolayer
pattern surfaces
disulfide precursor