Strong quantum-confinement effects in the conduction band of germanium nanocrystals

Bostedt, C.; van Buuren, T.; Willey, T.M.; Franco, N.; Terminello, L.J.; Heske, C.; Möller, T.
May 2004
Applied Physics Letters;5/17/2004, Vol. 84 Issue 20, p4056
Academic Journal
Quantum-confinement effects in the conduction band of deposited germanium nanocrystals are measured to be greater than in similar-sized silicon nanocrystals. The germanium particles are condensed out of the gas phase and their electronic properties are determined with x-ray absorption spectroscopy. The conduction band edge shifts range from 0.2 eV for 2.7 nm particles up to 1.1 eV for 1.2 nm particles.


Related Articles

  • Vibrational Properties of Ge Nanocrystals Determined by EXAFS. Araujo, L. L.; Kluth, P.; Azevedo, G. de M.; Ridgway, M. C. // AIP Conference Proceedings;2007, Vol. 882 Issue 1, p392 

    The vibrational properties of Ge nanocrystals (NCs) produced by ion implantation in SiO2 followed by thermal annealing were determined from temperature dependent Extended X-Ray Absorption Fine Structure (EXAFS) spectroscopy measurements. Using a correlated anharmonic Einstein model and...

  • Phase separation and nanocrystal formation in GeO. Sahle, Christoph J.; Sternemann, Christian; Conrad, Heiko; Herdt, Alexej; Feroughi, Omid M.; Tolan, Metin; Hohl, Achim; Wagner, Ralph; Lützenkirchen-Hecht, Dirk; Frahm, Ronald; Sakko, Arto; Hämäläinen, Keijo // Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p021910 

    The temperature-induced phase separation (disproportionation) and Ge nanocrystal formation in bulk amorphous germanium monoxide (a-GeOx,x≈1) are studied both in situ and ex situ by measurements of the x-ray absorption near edge structure at the Ge K-edge and x-ray diffraction. The...

  • Theoretical study of band edges in porous silicon. Yorikawa, H.; Sato, T.; Muramatsu, S. // Journal of Applied Physics;4/1/2004, Vol. 95 Issue 7, p3569 

    The shift of band edges in porous silicon is studied by simulation based on tight-binding band calculations for model structures mimicking porous silicon. The results are compared with recent measurements of band edge shifts, and the greater shift of the valence band edge compared to the...

  • Electronic structure of copper halides CuI and CuCl: A comparative X-Ray photoelectron and absorption spectroscopy study. Generalov, A.; Vinogradov, A. // Physics of the Solid State;Jun2013, Vol. 55 Issue 6, p1136 

    The energy distributions of the occupied and unoccupied electronic states for copper halides CuCl and CuI have been investigated using X-ray photoemission and absorption spectroscopy with a highenergy resolution on the equipment of the Russian-German beamline for outlet and monochromatization of...

  • Size correlated long and short range order of ternary Co2FeGa Heusler nanoparticles. Wang, C. H.; Guo, Y. Z.; Casper, F.; Balke, B.; Fecher, G. H.; Felser, C.; Hwu, Y. // Applied Physics Letters;9/6/2010, Vol. 97 Issue 10, p103106 

    The long and short range order of chemically prepared Co2FeGa Heusler nanoparticles with various sizes are determined by x-ray diffraction (XRD) and extended x-ray absorption fine structure (EXAFS) spectroscopy. Specifically, EXAFS fittings reveal the size dependent crystal structure and short...

  • Orbital structure of FeTiO3 ilmenite investigated with polarization-dependent X-ray absorption spectroscopy and band structure calculations. Chen, S. W.; Huang, M. J.; Lin, P. A.; Jeng, H. T.; Lee, J. M.; Haw, S. C.; Chen, S. A.; Lin, H. J.; Lu, K. T.; Chen, D. P.; Dou, S. X.; Wang, X. L.; Chen, J. M. // Applied Physics Letters;1/28/2013, Vol. 102 Issue 4, p042107 

    We explored the orbital structure of FeTiO3 with polarization-dependent x-ray absorption spectra complemented with electronic structure calculations. The electronic structure, near the bottom of conduction band, is composed of O 2p and Ti 3d orbitals. Ti 3d/4p hybridization dominantly lies on...

  • Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure. Li, Zhong-Rui; Yan, Wensheng; Wei, Shiqiang // AIP Conference Proceedings;2007, Vol. 882 Issue 1, p767 

    The electronic properties of gold nanoparticles supported on different supports were studied with X-ray absorption fine structure (XAFS). It was found that the tunability of the d-electron distribution in the nano-sized Au clusters can be realized by selective supporting. The Au atoms in the...

  • Theory of polarization dependent intersubband transitions in p-type SiGe/Si self-assembled quantum dots. Yih-Yin Lin; Singh, Jasprit // Journal of Applied Physics;7/15/2004, Vol. 96 Issue 2, p1059 

    Electronic and optoelectronic properties of SiGe/Si self-assembled quantum dots are calculated by the eight-band k-p method with a revised set of parameters. The model confirms that the Si1-xGex transforms to a type-II structure when x is greater than 0.25 and given accurate effective masses for...

  • Structural properties of Ge nanocrystals synthesized by a PVD nanocluster source. Parola, S.; Quesnel, E.; Muffato, V.; Guetaz, L.; Szambolics, H.; Bartringer, J.; Slaoui, A. // Journal of Nanoparticle Research;Sep2012, Vol. 14 Issue 9, p1 

    In this study, the synthesis of Ge nanoparticles by a physical vapour deposition (PVD) nanocluster source has been investigated. We typically obtain Ge nanoparticles with a mean diameter between 4 and 9 nm. The microstructure of Ge nanoparticles was widely studied by high resolution transmission...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics