Re-dispersion and film formation of GdVO 4: Ln 3+ (Ln 3+ = Dy 3+, Eu 3+, Sm 3+, Tm 3+) nanoparticles: Particle size and luminescence studies
Date
2012
Authors
Singh, N.S.
Ningthoujam, R.S.
Phaomei, G.
Singh, S.D.
Vinu, A.
Vatsa, R.K.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Dalton Transactions, 2012; 41(15):4404-4412
Statement of Responsibility
Conference Name
Abstract
GdVO 4:Ln 3+ (Ln 3+ = Dy 3+, Eu 3+, Sm 3+, Tm 3+) nanoparticles are prepared by a simple chemical route at 140 °C. The crystallite size can be tuned by varying the pH of the reaction medium. Interestingly, the crystallite size is found to increase significantly when pH increases from 6 to 12. This is related to slower nucleation of the GdVO 4 formation with increase of VO 4 3- present in solution. The luminescence study shows an efficient energy transfer from vanadate absorption of GdVO 4 to Ln 3+ and thereby enhanced emissions are obtained. A possible reaction mechanism at different pH values is suggested in this study. As-prepared samples are well dispersed in ethanol, methanol and water, and can be incorporated into polymer films. Luminescence and its decay lifetime studies confirm the decrease in non-radiative transition probability with the increase of heat treatment temperature. Re-dispersed particles will be useful in potential applications of life science and the film will be useful in display devices.
School/Discipline
Dissertation Note
Provenance
Description
Data source: Supplementary information, http://www.rsc.org/suppdata/dt/c2/c2dt12190e/c2dt12190e.pdf
Link to a related website: https://espace.library.uq.edu.au/view/UQ:283441/UQ283441_OA.pdf, Open Access via Unpaywall
Access Status
Rights
Copyright 2012 Royal Society of Chemistry