Phys. Rev. Lett. 82, 5377–5380 (1999)

Quantum Confinement Effect in Diamond Nanocrystals Studied by X-Ray-Absorption Spectroscopy

Abstract

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Y. K. Chang¹, H. H. Hsieh¹, W. F. Pong^1,*, M.-H. Tsai², F. Z. Chien¹, P. K. Tseng¹, L. C. Chen³, T. Y. Wang³, K. H. Chen⁴, D. M. Bhusari⁴, J. R. Yang⁵, and S. T. Lin⁵
¹Department of Physics, Tamkang University, Tamsui 251, Taiwan
²Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
³Center for Condensed Matter Sciences, National Taiwan University, Taipei 107, Taiwan
⁴Institute of Atomic and Molecular Science, Academia Sinica, Taipei 107, Taiwan
⁵Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 107, Taiwan

Received 11 December 1998; published in the issue dated 28 June 1999

This study measures the x-ray-absorption spectra of a series of nanodiamond thin films with grain diameters ranging from 3.5 nm to 5μm at the C K-edge using the sample drain current mode at room temperature. Resonance peaks resembling the C 1s core exciton are observed. The exciton state and conduction band edge are found to shift to higher energies with the decrease of the grain size indicative of the presence of the quantum confinement effect.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.82.5377

DOI:

10.1103/PhysRevLett.82.5377

PACS:

78.70.Dm, 61.10.Ht, 71.24.+q, 71.35.-y

^*Author to whom all correspondence should be addressed.

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Phys. Rev. Lett. 82, 5377–5380 (1999)

Quantum Confinement Effect in Diamond Nanocrystals Studied by X-Ray-Absorption Spectroscopy

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