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A Study of $Mn^{2+}$ Doping in CdS Nanocrystals

Nag, Angshuman and Sapra, Sameer and Nagamani, C and Sharma, Ajay and Pradhan, N and Bhat, SV and Sarma, DD (2007) A Study of $Mn^{2+}$ Doping in CdS Nanocrystals. In: Chemistry of Materials, 19 (13). pp. 3252-3259.

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We report here the synthesis of water soluble $Mn^{2+}$-doped CdS nanocrystals in which it has been possible for the first time to obtain a distinct $Mn^{2+}$ d-related emission well-separated from the defect state emissions. By varying the reaction temperature systematically, we establish 55 °C as the optimum temperature to maximize the $Mn^{2+}$ d emission, the existence of this optimum synthesis temperature being shown as the result of two opposing influences of the temperature. Most interestingly, present results establish that $Mn^{2+}$ favors preferential doping of larger-sized particles even within the narrow size distribution achieved in the present synthesis, rendering the relatively smaller-sized nanocrystals depleted of $Mn^{2+}$ for any given synthesis. One important aspect of the present approach is that the synthesized nanocrystals readily dissolve in water without any deleterious effect on the $Mn^{2+}$ d-related emission intensity.

Item Type: Journal Article
Publication: Chemistry of Materials
Publisher: American Chemical Society(ACS)
Additional Information: Copyright of this article belongs to American Chemical Society(ACS).
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Sep 2007
Last Modified: 19 Sep 2010 04:39
URI: http://eprints.iisc.ac.in/id/eprint/11873

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