@article { ISI:000316238400025,
	title = {One pot synthesis, growth mechanism and optical properties of Zn1-xCdxSe graded core/shell and alloy nanocrystals},
	journal = {Journal of Luminescence},
	volume = {135},
	year = {2013},
	month = {MAR},
	pages = {154-159},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Comparatively higher photoluminescence yield along with robustness of core/shell semiconductor nanocrystals make them attractive candidates for studying intricate quantum size effects. Here, we report, one pot synthesis of Zn1-xCdxSe graded core/shell structures by exploiting change in the reactivity of precursors. Optical and structural measurements indicate formation of graded structure. Growth mechanism probed by inductively coupled plasma atomic emission spectroscopy shows formation of graded core/shell structure, with CdSe rich core and ZnSe rich shell. Annealing these nanocrystals, in chemical bath, leads to diffusion of Cd from core to shell region. Formation of Zn1-xCdxSe alloy is also observed in X-ray photoelectron spectroscopic measurements, confirming the diffusion of Cd from core to shell region. Substantially high photoluminescence quantum efficiency of 60\% with narrow line width of about 27 nm, was observed and is attributable to the reduced strain due to graded core/shell structure. (C) 2012 Elsevier B.V. All rights reserved.</p>},
	keywords = {Graded core/shell, II-VI Semiconductor, Luminescence, Optical properties, Semiconductor alloy},
	issn = {0022-2313},
	doi = {10.1016/j.jlumin.2012.10.042},
	author = {Sonawane, Kiran G. and Patil, K. R. and Mahamuni, Shailaja}
}
@article { ISI:000338820600009,
	title = {Synthesis and luminescence of graphene-nano calcium sulphide composite},
	journal = {Materials Chemistry and Physics},
	volume = {147},
	number = {1-2},
	year = {2014},
	month = {SEP},
	pages = {57-64},
	publisher = {ELSEVIER SCIENCE SA},
	address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND},
	abstract = {<p>Graphene-nanocrystalline calcium sulphide has been synthesized using in-situ reduction of calcium salt and graphene oxide. Graphene oxide was prepared using Hummer{\textquoteright}s method. Surface morphology and crystal structure of samples were observed by transmission electron microscopy (TEM) and X-Ray diffraction (XRD). Ultra thin graphene and graphene oxide sheets with size ranging between tens to several hundreds of square nanometers are observed in TEM images. The TEM micrographs of G-CaS show that CaS particles are embedded in graphene sheets and the average particle size of CaS particles in the composite is less than 50 nm. The reduction in the intensity of various functional groups in FTIR spectrum also confirms the formation of graphene. The UV-Visible spectra of CaS shows absorption peak at 220 nm with a small shoulder at 250 nm whereas in G-CaS 220 nm absorption peak has reduced intensity and the shoulder at 250 nm has now shifted to 270 nm due to modification in the defect structure of CaS by graphene. CaS and G-CaS shows photoluminescence emission at 470 nm (lambda(exc.) = 375 nm) and 440 nm (lambda(exc.) = 350 nm) respectively, however emission intensity of G-CaS is relatively lower than CaS. Although the emission intensity is found to be lower than CaS, addition of CaS to graphene in G-CaS complex has made graphene luminescent. XPS spectra also indicate reduction of various oxygen containing functional groups in highly reduced graphene oxide and G-CaS. (C) 2014 Elsevier B.V. All rights reserved.</p>},
	keywords = {Luminescence, Nanostructures, powder diffraction, Precipitation},
	issn = {0254-0584},
	doi = {10.1016/j.matchemphys.2014.04.006},
	author = {Sharma, Geeta and Patil, K. R. and Gosavi, S. W.}
}
