Please use this identifier to cite or link to this item: http://13.232.72.61:8080/jspui/handle/123456789/1980
Title: Superstructures of doped yttrium aluminates for luminescent and advanced forensic investigations
Authors: Darshan, G. P.
Premkumar, H. B.
Nagabhushana, H.
Sharma, S. C.
Daruka Prasad, B.
Prashantha, S. C.
Basavaraj, R. B.
Keywords: Bio mediated synthesis
Morphology
Photoluminescence
Judd-Ofelt analysis
Latent fingerprint
Issue Date: 2016
Publisher: ELSEVIER
Citation: Darshan, G. P., Premkumar, H. B., Nagabhushana, H., Sharma, S. C., Prasad, B. D., Prashantha, S. C., & Basavaraj, R. B. (2016). Superstructures of doped yttrium aluminates for luminescent and advanced forensic investigations. Journal of Alloys and Compounds, 686, 577-587.
Abstract: Nanocrystalline Tb3+ (1–11mol %) doped YAlO3 phosphors were prepared by biocompatible combustion route using Aloe Vera gel as a fuel. The average crystallite sizes were estimated using XRD and TEM found to be ~27 nm. Scanning electron micrographs showed mcirolayered superstructurs of various shapes of uniform particles. Upon 341 nm excitation, the photoemission profile of YAlO3: Tb3+ exhibit a narrow green emission peak at 545 nm due to 5D4 7F5 transition. Optical parameters such as Judd–Ofelt parameters, radiative transition probabilities, radiative lifetimes, branching ratio, stimulated emission cross-section and optical gain were estimated by Judd–Ofelt theory. CIE coordinate for the optimized phosphor was (x=0.308, y=0.435) which is very close to NTSC standard value for green emission. Further, the correlated color temperature was estimated and found to be ~ 6178 K. A simple, fast, highly sensitive and ecofriendly method for the detection and enhancement of fingermarks in various forensic relevant materials was presented
URI: http://13.232.72.61:8080/jspui/handle/123456789/1980
ISSN: 0925-8388
Appears in Collections:Faculty of Science

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