Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 38, Pages 20574-20578Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp305806v
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Funding
- U.S. Department of Energy [DE-AC02-98CH10886]
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Using transmission electron microscopy, we study the size-dependent room-temperature oxidation of indium nanoparticles. From the investigation of arrays of In nanoparticles with broad size distribution, we evaluate, under identical conditions, the In2O3 thickness as a function of size at a given time. The results of our measurements are in excellent agreement with predictions for a Mott-Cabrera model corrected for a spherically symmetric electric field and directly demonstrate the accelerated oxidation kinetics of nanoscale particles with high curvature. We show that the size-dependent oxidation kinetics of nanoparticles can be probed by considering polydisperse arrays of nanoparticles as snapshots of the oxidation kinetics of differently sized particles.
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