Published January 1, 2014
| Version v1
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Reassembly and Oxidation of a Silver Nanoparticle Bilayer Probed by in Situ X-ray Reciprocal Space Mapping
Creators
- 1. SAS, Inst Phys, Bratislava 84511, Slovakia
- 2. Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
Description
We report on an in situ observation of reassembly and oxidation of a selfassembled silver nanoparticle bilayer due to an UV/ozone treatment and removal of the nanoparticle surfactant molecules. Such arrays of metal oxide nanoparticles are designated for sensor applications. To follow simultaneously the temporal evolution of particular processes taking place at different length scales, we employed the small- and wide-angle X-ray scattering in situ. In this way, all relevant transformation stages were identified: removal of the nanoparticle surfactant shell accompanied by a loss of the nanoparticle position correlations, oxidation of the nanoparticle crystalline core, and final reassembly of the silver oxide nanoparticles into agglomerates. Study of these processes on a common timeline provides a detailed insight into the kinetics of the UV/ozone treatment which represents a simple and effective method for preparation of metal oxide nanopartide arrays for sensors.
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