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Hydrothermal Growth of Vertically Aligned ZnO Nanorods Using a Biocomposite Seed Layer of ZnO Nanoparticles
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
King Saud University, Riyadh, Saudi Arabia .
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2013 (English)In: Materials, ISSN 1996-1944, Vol. 6, no 8, 3584-3597 p.Article in journal (Refereed) Published
Abstract [en]

Well aligned ZnO nanorods have been prepared by a low temperature aqueous chemical growth method, using a biocomposite seed layer of ZnO nanoparticles prepared in starch and cellulose bio polymers. The effect of different concentrations of biocomposite seed layer on the alignment of ZnO nanorods has been investigated. ZnO nanorods grown on a gold-coated glass substrate have been characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) techniques. These techniques have shown that the ZnO nanorods are well aligned and perpendicular to the substrate, and grown with a high density and uniformity on the substrate. Moreover, ZnO nanorods can be grown with an orientation along the c-axis of the substrate and exhibit a wurtzite crystal structure with a dominant (002) peak in an XRD spectrum and possessed a high crystal quality. A photoluminescence (PL) spectroscopy study of the ZnO nanorods has revealed a conventional near band edge ultraviolet emission, along with emission in the visible part of the electromagnetic spectrum due to defect emission. This study provides an alternative method for the fabrication of well aligned ZnO nanorods. This method can be helpful in improving the performance of devices where alignment plays a significant role.

Place, publisher, year, edition, pages
MDPI , 2013. Vol. 6, no 8, 3584-3597 p.
Keyword [en]
biocomposite seed layer; ZnO nanorods; hydrothermal growth method; starch; cellulose
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-103818DOI: 10.3390/ma6083584ISI: 000330293100034OAI: diva2:691713
Available from: 2014-01-28 Created: 2014-01-28 Last updated: 2014-02-20Bibliographically approved
In thesis
1. Synthesis of metal oxide nanostructures, their characterization and chemical sensing applications
Open this publication in new window or tab >>Synthesis of metal oxide nanostructures, their characterization and chemical sensing applications
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The existence of nanomaterials is a revolutionizing step towards the fabrication of nanodevices and it enhances the enthusiasm of the researchers for the development of new devices with improved performance relative to that of bulk material based devices. Among the nanomaterials, the metal oxide nanostructures have drawn the attention of scientific community in the development of different biochemical and biomedical nanodevices in the recent time. Today, the nanotechnology based applications of several materials particularly biosensing, molecular imaging, biological separation, biomarkers and photodynamic therapy have given wide spectrum of the fabrication of novel and sensitive nanodevices. The attraction of nanomaterials based devices is hidden in the fact of their desirable and unique properties such as high surface to volume ratio, biocompatibility, fast electron transfer rate, and nontoxic in many cases. The biocompatibility is the most favourable property of several nanomaterials such as ZnO, TiO2 etc. which provide the solid platform for the synthesis of nanomedicine. In the sensor technology, the uses of nanomaterials have shown the drastic and bombastic realization of high sensitivity for a particular sensor and the possible detection of specific analytes from their small volumes. The metal oxide nanostructures show a fast electron communication, and high degree of adsorption of biosensitive material which further enhances the sensitivity of nanosensor device. The metal oxides nanostructures  exhibit tuneable size; morphology based chemical and physical properties which are easily to combine with biosensitive material in the fabrication of sensitive chemical and biosensors. The metal oxide nanostructures experienced attractive surface chemistry, high surface  to volume ratio, valuable thermal and electrical properties, therefore the development of nanosensors is accompanied by high sensitivity, low limit of detection and a fast response time.

In this dissertation, several metal oxide nanostructures have been presented such as ZnO, CuO, NiO, Co3O4, Fe2O3, Mn3O4, NiCo2O4 and TiO2. By exploiting the favourable properties of these metal oxides for the sensing, thus have been used potentially in the fabrication of chemical nanosensors.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2014. 56 p.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1577
Hydrothermal method, seed layer, ZnO nanorods, ZnO nanotubes, immunosensor, iron ferrite, glucose sensor, well aligned ZnO nanorods, CuO nanoleaves, CuO nanosheets, CuO bundle of nanowires
National Category
Natural Sciences
urn:nbn:se:liu:diva-104422 (URN)978-91-7519-394-6 (print) (ISBN)
Public defence
2014-03-20, K 3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:00 (English)
Available from: 2014-02-17 Created: 2014-02-17 Last updated: 2014-02-17Bibliographically approved

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