Nanoporous characteristics of sol-gel-derived ZnO thin film

Sol-gel-derived nanoporous ZnO film has been successfully deposited on glass substrate at 200 °C and subsequently annealed at different temperatures of 300, 400 and 600 °C. Atomic force micrographs demonstrated that the film was crack-free, and that granular nanoparticles were homogenously distribut...

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Bibliographic Details
Published in:Journal of semiconductors 2012-04, Vol.33 (4), p.7-12
Main Authors: Ansari, Anees A., Khan, M.A.M., Alhoshan, M., Alrokayan, S.A., Alsalhi, M.S.
Format: Article
Language:English
Subjects:
Enzymes
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Porosity
Semiconductors
Thin films
Zinc oxide
ZnO薄膜
凝胶
原子力显微镜
多孔
溶胶
特征
纳米粒子
衍生
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Summary:Sol-gel-derived nanoporous ZnO film has been successfully deposited on glass substrate at 200 °C and subsequently annealed at different temperatures of 300, 400 and 600 °C. Atomic force micrographs demonstrated that the film was crack-free, and that granular nanoparticles were homogenously distributed on the film surface. The average grain size of the nanoparticles and RMS roughness of the scanned surface area was 10 nm and 13.6 nm, respectively, which is due to the high porosity of the film. Photoluminescence （PL） spectra of the nanoporous ZnO film at room temperature show a diffused band, which might be due to an increased amount of oxygen va- cancies on the lattice surface. The observed results of the nanoporous ZnO film indicates a promising application in the development of electrochemical biosensors due to the porosity of film enhancing the higher loading of biomacromolecules （enzyme and proteins）.
ISSN:1674-4926
DOI:10.1088/1674-4926/33/4/042002