Energy levels in metal oxide semiconductor quantum dots in water-based colloids

作者: Fanyao Qu , P. C. Morais

DOI: 10.1063/1.480200

关键词:

摘要: The three-dimensional Schrodinger and Poisson’s equations are used to calculate the conduction band profile, energy levels, Fermi of negatively charged semiconductor quantum dots. calculation is carried out self-consistently within frame finite-difference method. Assuming effective mass proton at semiconductor–electrolyte interface, we found profile for spherical ZnO dots dispersed as aqueous colloids very similar symmetric modulation-doped wells. levels obtained a function offset interface. A comparison uncharged an alternative explanation observed reversible blue shift in absorption spectrum under illumination.

参考文章(27)
Masakazu. Anpo, Takahito. Shima, Sukeya. Kodama, Yutaka. Kubokawa, Photocatalytic hydrogenation of propyne with water on small-particle titania: size quantization effects and reaction intermediates The Journal of Physical Chemistry. ,vol. 91, pp. 4305- 4310 ,(1987) , 10.1021/J100300A021
W. David Kingery, Yet-ming Chiang, Dunbar P. Birnie, Physical Ceramics: Principles for Ceramic Science and Engineering ,(1996)
Ernesto Joselevich, Itamar Willner, Photosensitization of Quantum-Size TiO2 Particles in Water-in-Oil Microemulsions The Journal of Physical Chemistry. ,vol. 98, pp. 7628- 7635 ,(1994) , 10.1021/J100082A039
Fanyao Qu, Paulo César de Morais, Hydrogenic Impurity States in n-Doped and Undoped Quantum Wells of GaAs-AlxGa1-xAs Embedded in Intense Laser Fields. Journal of the Physical Society of Japan. ,vol. 67, pp. 513- 518 ,(1998) , 10.1143/JPSJ.67.513
I‐H. Tan, G. L. Snider, L. D. Chang, E. L. Hu, A self‐consistent solution of Schrödinger–Poisson equations using a nonuniform mesh Journal of Applied Physics. ,vol. 68, pp. 4071- 4076 ,(1990) , 10.1063/1.346245
Lin X. Chen, Tijana Rajh, Zhiyu Wang, Marion C. Thurnauer, XAFS Studies of Surface Structures of TiO2 Nanoparticles and Photocatalytic Reduction of Metal Ions Journal of Physical Chemistry B. ,vol. 101, pp. 10688- 10697 ,(1997) , 10.1021/JP971930G
A. J. C. Cardoso, P. C. Morais, H. M. Cox, Investigation of many‐body effects in one‐side modulation‐doped InP‐InGaAs heterostructure Applied Physics Letters. ,vol. 68, pp. 1105- 1107 ,(1996) , 10.1063/1.115727
A. M. Walsh, R. D. Coalson, Lattice field theory for spherical macroions in solution: Calculation of equilibrium pair correlation functions Journal of Chemical Physics. ,vol. 100, pp. 1559- 1566 ,(1994) , 10.1063/1.467255