Quantum confinement effect in nanocomposites

Chakravorty, D. ; Banerjee, S. ; Kundu, T. K. (2001) Quantum confinement effect in nanocomposites Applied Surface Science, 182 (3-4). pp. 251-257. ISSN 0169-4332

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01694...

Related URL: http://dx.doi.org/10.1016/S0169-4332(01)00441-X


Composites of nanometer-sized metal particles within a dielectric medium have attracted a lot of attention in recent years because of interesting properties exhibited by them. Quantum confinement effect tend to dominate the properties of carriers within the particles having nanoscale dimensions. Nanocomposites have been prepared by simple chemical methods. Optical absorption data when analyzed with Mie's scattering formula give results which indicate a metal-insulator type transition in the case of silver particles having diameters around 3 nm. Heterostructure quantum dots involving Ag2O nanoparticles with a thin shell of metallic silver show unusual optical absorption spectra again arising due to a confinement effect. Composites consisting of the ferroelectric phase BaTiO3 and nanosized nickel or silver, in a gel medium show a large increase in the value of dielectric permittivity. This is explained as resulting from a quantum size effect.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Nanocomposites; Quantum Confinement; Electrodeposition; Optical Absorption
ID Code:7407
Deposited On:25 Oct 2010 11:39
Last Modified:28 May 2011 04:39

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