Integration of Quartz Crystal Microbalance with Vibrational Sum Frequency Spectroscopy-Quantification of the Initial Oxidation of Alkanethiol-Covered Copper
Artikel i vetenskaplig tidskrift, 2012

We report the first integration of the interface sensitive technique vibrational sum frequency spectroscopy (VSFS) and the mass sensitive technique quartz crystal microbalance (QCM). VSFS-QCM has been applied in-situ to follow the formation of a thin Cu2O-like oxide on octadecanethiol-covered copper in dry air at ambient pressure conditions. We observed significant changes and an evolution of the VSF spectra caused by alterations in the electronic properties of the metal surface, and simultaneous shifts in the QCM resonance frequency due to a mass change during the formation of the oxide. QCM and VSFS exhibit a resolution corresponding to the formation of around 2% and 5% of an ideal monolayer of Cu2O, respectively. The successful integration of QCM increases the versatility of VSFS in numerous applications, where simultaneous in situ mass and spectroscopic information is desirable.

in-situ

interfaces

self-assembled monolayers

acid

adsorption

atmospheric corrosion

n-alkanethiols

ir

metal-surfaces

optical 2nd-harmonic generation

Författare

S. Hosseinpour

Kungliga Tekniska Högskolan (KTH)

Markus Schwind

Chalmers, Teknisk fysik, Kemisk fysik

Bengt Herbert Kasemo

Chalmers, Teknisk fysik, Kemisk fysik

C. Leygraf

Kungliga Tekniska Högskolan (KTH)

C. M. Johnson

Kungliga Tekniska Högskolan (KTH)

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 116 24549-24557

Ämneskategorier

Fysik

DOI

10.1021/jp3066426