Nanoplasmonic sensing and QCM-D as ultrasensitive complementary techniques for kinetic corrosion studies of aluminum nanoparticles
Artikel i vetenskaplig tidskrift, 2011

Corrosion (oxidation) kinetics of Al nanodisks, 262nm in diameter and 20nm in height, was measured in degassed Milli-Q water at 23 degrees C and neutral pH by quartz crystal microbalance with dissipation monitoring (QCM-D) and nanoplasmonic sensing. The former detects the changes of the resonance frequency and the damping of the oscillation of a piezoelectric quartz crystal resonator. The latter detects the changes of the localized surface plasmon resonance (LSPR) in the metallic part of the Al nanoparticle, caused both by the shrinking metallic core and the changes in the dielectric environment as the oxide grows. Highly resolved kinetic data were obtained which show different corrosion stages. The two techniques yield complementary information not obtainable with one technique alone. Two main corrosion mechanisms, namely homogeneous oxide growth and nanoparticle fragmentation and roughening, are distinguished. The time dependence of the corrosion kinetics, determined using QCM-D, is in agreement with weight gain studies of bulk Al found in literature. The nanoplasmonic sensing measurements are compared to analytical model calculations of LSPR shifts which yield an estimate for the increase of oxide thickness during homogeneous oxide growth. (C) 2011 Elsevier B. V. All rights reserved.

hydrogen

microbalance with dissipation monitoring

generation

Localized

Aluminum nanoparticles

Nanoplasmonic sensing

film

in-situ

solar-cells

combustion

surface-plasmon resonance

Corrosion

liquid water

surface plasmon resonances

quartz-crystal microbalance

spectroscopy

Quartz crystal

Metal oxidation in water

oxidation

Författare

Markus Schwind

Chalmers, Teknisk fysik, Kemisk fysik

Christoph Langhammer

Chalmers, Teknisk fysik, Kemisk fysik

Bengt Herbert Kasemo

Chalmers, Teknisk fysik, Kemisk fysik

Igor Zoric

Chalmers, Teknisk fysik, Kemisk fysik

Applied Surface Science

0169-4332 (ISSN)

Vol. 257 13 5679-5687

Ämneskategorier

Annan teknik

Fysik

DOI

10.1016/j.apsusc.2011.01.073