Title of article
Large two-photon absorbance of chitosan–ZnS quantum dots nanocomposite film
Author/Authors
Xiaohui Wang ، نويسنده , , Yumin Du، نويسنده , , Sha Ding، نويسنده , , Lihong Fan، نويسنده , , Xiaowen Shi، نويسنده , , Ququan Wang، نويسنده , , Guiguang Xiong، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2005
Pages
5
From page
96
To page
100
Abstract
ZnS semiconductor nanoparticles with average size of 3.4 nm were prepared in situ in chitosan film. TEM, UV–vis spectra and PL spectra show the ZnS nanoparticles in chitosan template were monodispersed and well passivated. The two-photon absorption coefficient (β) of the chitosan–ZnS quantum dots (QDs) nanocomposite film was obtained to be 2.29×102 cm/Gw from a standard Z-scan setup with femtosecond laser pusles at 790 nm wavelength. Results show the novel biomacromolecule/QDs nanocomposite film has large third-order optical nonlinear absorption, the mechanism responsible for which was discussed.
Keywords
z-scan , Chitosan , Two-photon absorption , ZnS quantum dots
Journal title
Physica E Low-dimensional Systems and Nanostructures
Serial Year
2005
Journal title
Physica E Low-dimensional Systems and Nanostructures
Record number
1051762
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