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 5679-5687Ämneskategorier
Annan teknik
Fysik
DOI
10.1016/j.apsusc.2011.01.073