Surface graphitization of ozone-treated detonation nanodiamonds

被引：8

作者：

Arnault, Jean-Charles ^{[1
]}

Petit, Tristan ^{[1
,2
]}

Girard, Hugues A. ^{[1
]}

Gesset, Celine ^{[1
]}

Combis-Schlumberger, Mathilde ^{[1
]}

Sennour, Mohammed ^{[3
]}

Koscheev, Alex ^{[4
]}

Khomich, Andrei A. ^{[5
]}

Vlasov, Igor ^{[5
]}

Shenderova, Olga ^{[6
]}

机构：

[1] CEA, LIST, Diamond Sensors Lab, Gif Sur Yvette, France

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, Berlin, Germany

[3] Paristech, Mines Paris, Paris, France

[4] LY Karpov Phys Chem Res Inst, Moscow 103064, Russia

[5] RAS, Inst Gen Phys, Moscow 117901, Russia

[6] Int Technol Ctr, Raleigh, NC USA

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2014年 / 211卷 / 12期

关键词：

diamond; graphitization; nanocrystals; ozone; reconstruction; surfaces; GRAPHENE;

D O I：

10.1002/pssa.201431397

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bifunctional detonation nanodiamonds (NDs) were obtained by vacuum annealing at 750 degrees C of NDs previously oxidized in ozone (ND-ozone). Raman investigations demonstrate a significantly higher amount of sp(2) carbon compared to ND with polyfunctional surface (ND-NRI) annealed in vacuum under the same conditions. In addition to sp(2) carbon caps, thermal desorption mass spectroscopy analysis revealed a higher oxygen concentration at the ND-ozone surface with abundant carbonyl and carboxylic acid anhydride groups. The supernatant of ND-ozone annealed in vacuum exhibits a positive zeta potential (+50mV at pH 6.5), while the starting sample has a high negative zeta potential (-60mV). This supports the oxygen hole-doping model previously proposed to explain the positive zeta potential of NDs after vacuum annealing. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2739 / 2743

页数：5

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