Fabrication of Luminescent, Magnetic Hollow Core Nanospheres and Nanotubes of Cr-Doped ZnO by Inclusive Coprecipitation Method
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Fabrication of Luminescent, Magnetic Hollow Core Nanospheres and Nanotubes of Cr-Doped ZnO by Inclusive Coprecipitation Method
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| Creator |
K. , Jayanthi
Chawla, Santa Joshi, Amish G. Khan, Zahid H. Kotnala, R. K. |
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| Subject |
Chemistry
Materials Science |
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| Description |
Incorporation of Cr into ZnO lattice as a dopant in hollow core nanostructures has been achieved by coprecipitation in highly alkaline medium near room temperature. Energy dispersive spectroscopy and X-ray diffraction studies confirm the presence of Cr in the ZnO lattice and X-ray photoelectron spectroscopy (XPS)identified the dopant state to be Cr3+. Room temperature ferromagnetism in ZnO:Cr3+ along with structural investigations suggest an intrinsic nature of ferromagnetism in hollow core nanospheres. Unpaired spin in Cr3+ in zinc substitutional sites could create spin ordering and long-range ferromagnetic coupling. Higher Cr3+ concentration leads to the formation of hollow parallelepipeds and superparamagnetism. Photoluminescence
studies reveal a sharp blue emission explicitly arising due to Cr doping. Such blue emitting magnetic nanocapsules can have immense potential as biocarriers and also in spintronics.
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| Publisher |
American Chemical Society
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| Date |
2010-09
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/157/1/130.pdf
K. , Jayanthi and Chawla, Santa and Joshi, Amish G. and Khan, Zahid H. and Kotnala, R. K. (2010) Fabrication of Luminescent, Magnetic Hollow Core Nanospheres and Nanotubes of Cr-Doped ZnO by Inclusive Coprecipitation Method. Journal of Physical Chemistry C, 114 (43). pp. 18429-18434. ISSN 1932-7455 |
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| Relation |
http://npl.csircentral.net/157/
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