期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3133240
关键词
annealing; dissolving; electric field effects; gold; nanoparticles; nanotechnology; sputtering
资金
- Foundation of Nature Science of Heilongjiang Province [A0303]
- Foundation of Harbin Institute of Technology (Weihai) [IMJQ10000076, IMJQ10070000, IMSQ29080001]
Spherical gold (Au) nanoparticles are formed onto glass surface by sputtering of Au foil and the following annealing process. By employing electric field assisted annealing of above as-prepared samples, the original spherical Au nanoparticles are dissolved to lunar-eclipselike structure and even fully dissolved. When applied voltages are increased in steplike feature, spikelike sharp current increase is observed at every voltage step, and it is followed by a rather long current decaying process. The spikelike current increase indicates the onset of electronic transport, leading to Au nanoparticles polarization and ionization. Long current decaying process is assigned to the electronic conduction from cathode to recombine with as-ionized positive charges, along with Au cationic transport resulting in dissolution of Au atoms from the nanoparticles. Our current study provides straightforward evidence of electric field assisted dissolution of Au nanoparticles on glass surface.
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