Сибирский федеральный университет

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: European Conference on Diamond, Diamond-like Materials, Nitrides and Silicon Carbide (Diamond 1998)

Год издания: 1999

Ключевые слова: energy band diagram, nanodiamond, Raman spectroscopy, surface characterization

Аннотация: The surface properties of diamond nanoparticles (40-50 Angstrom in diameter) have been investigated by X-ray photoelectron spectroscopy (XPS), UV photoelectron spectroscopy (UPS) and Raman spectroscopy. The diamond nanoparticles have been deposited on flat Si(100) substrates by electrophoresis/dielectrophoresis. The as-deposited films are strongly oxidized and present a 1-2% nitrogen content. After treatment at 850 degrees C in H(2) plasma for 60 min, the oxygen is removed, and the position of the C 1s core-level peak indicates a n-type electronic comportment of the diamond nanoparticles. Raman spectroscopy of the as-deposited film shows a sp(3) contribution at 1321 cm(-1) and a sp(2) contribution around 1620 cm(-1). The 12 cm(-1) shift of the sp(3) contribution with respect to the bulk diamond peak at 1333 cm(-1) is attributed to a phonon confinement effect due to the size of the diamond particles. The H(2) plasma treatment induces a size decrease of the nanocrystallites confirmed by Raman and scanning electron microscopy (SEM) measurements. UPS spectroscopy shows a negative electron affinity of -0.2 eV of the hydrogenated nanodiamond film. (C) 1999 Elsevier Science S.A. All rights reserved.

Журнал: Diamond and related materials

Выпуск журнала: Т. 8, вып. 2-5

Номера страниц: 805-808

ISSN журнала: 09259635

Место издания: Lausanne, Switzerland

Издатель: Elsevier science sa

• Maillard-Schaller E.
• Kuettel O.M.
• Diederich L.
• Schlapbach L.
• Zhirnov V.V.
• Belobrov P.I. (KRASNOYARSK STATE UNIV)

• Web of Science Core Collection
• РИНЦ (eLIBRARY.RU)