Size-reduction of nanodiamonds via air oxidation

被引：67

作者：

Gaebel, T. ^{[1
]}

Bradac, C. ^{[1
]}

Chen, J. ^{[2
]}

Say, J. M. ^{[1
,3
]}

Brown, L. ^{[3
]}

Hemmer, P. ^{[2
]}

Rabeau, J. R. ^{[1
]}

机构：

[1] Macquarie Univ, Dept Phys & Astron, ARC Ctr Excellence Engn Quantum Syst EQUS, Sydney, NSW 2109, Australia

[2] Texas A&M Univ, College Stn, TX 77843 USA

[3] Macquarie Univ, Dept Chem & Biomol Sci, Sydney, NSW 2109, Australia

来源：

基金：

澳大利亚研究理事会;

关键词：

Nanodiamonds; Oxidation; Optical properties characterization; NV defects; DIAMOND; SPINS; CENTERS;

D O I：

10.1016/j.diamond.2011.09.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here we report the size reduction and effects on nitrogen-vacancy centres in nanodiamonds by air oxidation using a combined atomic force and confocal microscope. The average height reduction of individual crystals, as measured by atomic force microscopy, was 10 +/- 1 nm/h at 600 degrees C, 4 1 nm/h at 550 degrees C, and less than 1 nm/h at 500 degrees C from air oxidation at atmospheric pressure. The oxidation process modified the surface including removal of non-diamond carbon and organic material which also led to a decrease in background fluorescence. During the course of the nanodiamond size reduction, we observed the annihilation of nitrogen-vacancy centres which provided important insight into the behaviour of colour centres in small crystals. In these unirradiated samples, the smallest nanodiamond still hosting a stable nitrogen-vacancy centre observed was 8 nm. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：28 / 32

页数：5

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