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

Y. K. Chang; H. H. Hsieh; W. F. Pong; M.-H. Tsai; F. Z. Chien; P. K. Tseng; L. C. Chen; T. Y. Wang; K. H. Chen; D. M. Bhusari; J. R. Yang; S. T. Lin

doi:10.1103/PhysRevLett.82.5377

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

Y. K. Chang, H. H. Hsieh, W. F. Pong, M.-H. Tsai, F. Z. Chien, P. K. Tseng, L. C. Chen, T. Y. Wang, K. H. Chen, D. M. Bhusari, J. R. Yang, and S. T. Lin

Phys. Rev. Lett. 82, 5377 – Published 28 June 1999

Abstract

This study measures the x-ray-absorption spectra of a series of nanodiamond thin films with grain diameters ranging from 3.5 nm to $5 μ m$ at the C $K$ -edge using the sample drain current mode at room temperature. Resonance peaks resembling the C $1 s$ 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.

Received 11 December 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.5377

Authors & Affiliations

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