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Well aligned ZnO nanorods growth on the gold coated glass substrate by aqueous chemical growth method using seed layer of Fe3O4 and Co3O4 nanoparticles
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Ytors Fysik och Kemi. Linköpings universitet, Tekniska högskolan.
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2013 (Engelska)Ingår i: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 368, s. 39-46Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this study, Fe3O4 and Co3O4 nanoparticles were prepared by co-precipitation method and sol-gel method respectively. The synthesised nanoparticles were characterised by X-ray diffraction [XRD] and Raman spectroscopy techniques. The obtained results have shown the nanocrystalline phase of obtained Fe3O4 and Co3O4 nanoparticles. Furthermore, the Fe3O4 and Co3O4 nanoparticles were used as seed layer for the fabrication of well-aligned ZnO nanorods on the gold coated glass substrate by aqueous chemical growth method. Scanning electron microscopy (SEM), high resolution transmission electron microscopy [HRTEM], as well as XRD and energy dispersive X-ray techniques were used for the structural characterisation of synthesised ZnO nanorods. This study has explored highly dense, uniform, well-aligned growth pattern along 0001 direction and good crystal quality of the prepared ZnO nanorods. ZnO nanorods are only composed of Zn and O atoms. Moreover, X-ray photoelectron spectroscopy was used for the chemical analysis of fabricated ZnO nanorods. In addition, the structural characterisation and the chemical composition study and the optical investigation were carried out for the fabricated ZnO nanorods and the photoluminescence [PL] spectrum have shown strong ultraviolet (UV) peak at 381 nm for Fe3O4 nanoparticles seeded ZnO nanorods and the PL spectrum for ZnO nanorods grown with the seed layer of Co3O4 nanoparticles has shown a UV peak at 382 nm. The green emission and orange/red peaks were also observed for ZnO nanorods grown with both the seed layers. This study has indicated the fabrication of well aligned ZnO nanorods using the one inorganic nanomaterial on other inorganic nanomaterial due to their similar chemistry.

Ort, förlag, år, upplaga, sidor
Elsevier , 2013. Vol. 368, s. 39-46
Nyckelord [en]
Characterisation, Crystal structure, Hydrothermal crystal growth, Seed crystals, Nanomaterials, Oxides, Semiconducting II-VI materials
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:liu:diva-90667DOI: 10.1016/j.jcrysgro.2013.01.009ISI: 000315574700007OAI: oai:DiVA.org:liu-90667DiVA, id: diva2:614210
Anmärkning

Funding Agencies|King Saud University|RGP-VPP-023|

Tillgänglig från: 2013-04-03 Skapad: 2013-04-03 Senast uppdaterad: 2017-12-06
Ingår i avhandling
1. Synthesis of metal oxide nanostructures, their characterization and chemical sensing applications
Öppna denna publikation i ny flik eller fönster >>Synthesis of metal oxide nanostructures, their characterization and chemical sensing applications
2014 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2014. s. 56
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1577
Nyckelord
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
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-104422 (URN)978-91-7519-394-6 (ISBN)
Disputation
2014-03-20, K 3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2014-02-17 Skapad: 2014-02-17 Senast uppdaterad: 2014-02-17Bibliografiskt granskad

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