γ-Al2O3 nanoparticle production by arc-discharge in water: in situ discharge characterization and nanoparticle investigation

被引：33

作者：

Delaportas, D. ^{[1
]}

Svarnas, P. ^{[1
]}

Alexandrou, I. ^{[1
]}

Siokou, A. ^{[2
]}

Black, K. ^{[3
]}

Bradley, J. W. ^{[1
]}

机构：

[1] Univ Liverpool, Dept Elect Engn & Elect, Technol Plasmas Grp, Brownlow Hill, Liverpool L69 3GJ, Merseyside, England

[2] Fdn Res & Technol Hellas, Inst Chem Engn & High Temp Chem Proc, ICEHT, GR-26504 Patras, Greece

[3] Univ Cambridge, CAPE, Cambridge CB3 0FA, England

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

GAS-PHASE SYNTHESIS; CARBON ONIONS; GOLD NANOPARTICLES; OPTICAL-EMISSION; PLASMA; SPECTRUM; BETA; SPECTROSCOPY; GENERATION; SILVER;

D O I：

10.1088/0022-3727/42/24/245204

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

gamma-Al2O3 crystalline nanoparticles (NPs) are for the first time produced by the arc-discharge in water method. The discharge is studied in situ during the NP formation by simultaneously recording the voltage and current waveforms, emitted light intensity and time-resolved optical emission spectra and snapshots of the discharge. The microstructure of the NPs is investigated by high-resolution transmission electron microscopy, the chemical purity is confirmed by x-ray photoelectron spectroscopy and the crystalline structure by x-ray diffraction. The results experimentally demonstrate the successive phases that lead to the supersaturation condition governing this gas-phase bottom-up process for dielectric NP production.

引用

页数：11

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