云斯宁 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Journal of Colloid and Interface Science

Key Words:

中文关键字：纳米阵列，英文关键字：AZO nanofibers; Electrospinning; Morphologies; Cry

Abstract:

Electrospun ZnO precursor nanofibers of average diameters 122 ± 64 nm, 117 ± 44 nm and 110 ± 39 nm were fabricated by controlling the Al concentration of a polymeric solution. The resulting nanofibers were characterized by the XRD, SEM, EDS, TEM, XPS and PL. The electrospun Al-doped ZnO nanofiber films were polycrystalline and composed of densely packed grains, with crystallite size ranging from 28.7 nm, 25.7 nm, 25.4 nm to 20.4 nm corresponding to the atomic concentration of aluminum from 0, 1.6, 2.5 to 5.8 at.%. The incorporation of aluminum resulted in a decrease trend in the grain size and lattice parameter of the ZnO nanofiber films. The room temperature PL spectra of all samples show three different emissions, including UV (ultraviolet) emission with an obvious blue shift, Vis (visible) emission and NIR (near infrared) emission, the intensity of which decreases monotonically as the doping concentration is increased except for the highest doping level. The impurity content correlates with changes in the PL spectra, and the appropriate Al doping can improve the optical properties of ZnO nanofibers. The small size effect and Al-doping or the impurity incorporation should be responsible for the blue shift observation in Al-doped ZnO nanofiber films.

Note:

云斯宁

Co-author:

SangwooLim

First Author:

yunsining

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：360

Page Number:

页：430–439

Translation or Not:

no

Date of Publication:

2011-06-01