Combined in Situ Quartz Crystal Microbalance with Dissipation Monitoring, Indirect Nanoplasmonic Sensing, and Vibrational Sum Frequency Spectroscopic Monitoring of Alkanethiol-Protected Copper Corrosion
Artikel i vetenskaplig tidskrift, 2013

In this study, we have applied three techniques to simultaneously and in situ study the initial stage of corrosion of copper protected by a self-assembled monolayer of octadecanethiol (ODT). We combined quartz crystal microbalance with dissipation monitoring (QCM-D), indirect nanoplasmonic sensing (INPS), and vibrational sum frequency spectroscopy (VSFS) and obtained complementary information about mass uptake and optical and spectroscopic changes taking place during the initial corrosion phase. All three techniques are very sensitive to the formation of a corrosion film (thickness in the range 0-0.41 nm) under mildly corrosive conditions (dry air, <0.5% relative humidity). The three techniques yield information about the viscoelasticity of the corrosion film (QCM-D), the homogeneity of the corrosion reaction on the surface (INPS), and the stability of the ODT. protection layer (VSFS). Furthermore, by also studying the corrosion process in humid air (ca. 70% relative humidity), we illustrate how the combination of these techniques can be used to differentiate between simultaneously occurring processes, such as water adsorption and corrosion product formation.

Författare

Markus Schwind

Chalmers, Teknisk fysik, Kemisk fysik

S. Hosseinpour

Kungliga Tekniska Högskolan (KTH)

C. M. Johnson

Kungliga Tekniska Högskolan (KTH)

Christoph Langhammer

Chalmers, Teknisk fysik, Kemisk fysik

Igor Zoric

Chalmers, Teknisk fysik, Kemisk fysik

C. Leygraf

Kungliga Tekniska Högskolan (KTH)

Bengt Herbert Kasemo

Chalmers, Teknisk fysik, Kemisk fysik

Langmuir

0743-7463 (ISSN) 1520-5827 (eISSN)

Vol. 29 23 7151-7161

Ämneskategorier

Annan teknik

DOI

10.1021/la4009224

Mer information

Senast uppdaterat

2018-02-26