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  Enhanced Quantum Confined Stark Effect in a mesoporous hybrid multifunctional system

Gogoi, M., Deb, P., Sen, D., Mazumder, S. M., & Kostka, A. (2014). Enhanced Quantum Confined Stark Effect in a mesoporous hybrid multifunctional system. Solid State Communications; Pergamon, New York, 187, 48-52. doi:10.1016/j.ssc.2014.02.011.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-C10A-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-C10B-9
Genre: Journal Article

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 Creators:
Gogoi, Madhulekha1, Author              
Deb, Pritam1, Author              
Sen, Debasis2, Author              
Mazumder, Subhasish Mitra2, Author              
Kostka, Aleksander3, Author              
Affiliations:
1Department of Physics, Tezpur University (Central University), Tezpur 784028, Assam, India, persistent22              
2Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India, persistent22              
3Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              

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Free keywords: Biomedical imaging applications; C. Multifunctional; D. QCSE; Mesoporous hybrids; Multifunctional systems; Quantum confined stark effect; Superparamagnetic iron oxide nanoparticles; Superparamagnetic nanoparticles, Electric fields; Hybrid systems; Medical imaging; Superparamagnetism, Mesoporous materials
 Abstract: Quantum Confined Stark Effect in hybrid of CdTe quantum dot with superparamagnetic iron oxide nanoparticles in both nonporous and mesoporous silica matrix has been realized. The observed QCSE is due to the local electric field induced by charge dispersion at SiO2/polar solvent interface. Enhanced Stark shift of 89.5 meV is observed in case of mesoporous hybrid structure and the corresponding local electric field has been evaluated as 4.38×104 V/cm. The enhancement is assumed to be caused by greater density of charge in the mesoporous hybrid. The conjugation of superparamagnetic nanoparticles in this tailored hybrid microstructure has not imparted any alteration to the Stark shift, but has added multifunctional attribute. The present study on the local electric field induced enhanced QCSE with wavelength modulation towards red end paves the way of developing magneto-fluorescent hybrid systems for biomedical imaging application. © 2014 Elsevier Ltd.

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Language(s): eng - English
 Dates: 2014-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.ssc.2014.02.011
BibTex Citekey: Gogoi201448
 Degree: -

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Title: Solid State Communications; Pergamon, New York
Source Genre: Journal
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Pages: - Volume / Issue: 187 Sequence Number: - Start / End Page: 48 - 52 Identifier: ISSN: 00381098