Download Magic Sized Nano-Clusters of CdSe, Potential White Light Material.

Magic Sized Nano-Clusters of CdSe, Potential White Light Material.
Aditi Jadhav, P. K. Khanna*
Nanochemistry Laboratory, Department of Applied Chemistry,
Defence institutes of Advanced Technology, Girinagar, Pune, 411025
*HOD Applied Chemistry, Email: [email protected]
Abstract Quantum dots via formation of early stage nano-crystals leading to stable
Magic sized nano-clusters of metal selenides can be effectively prepared by the current
approach. MSNCs can be identified by absorption spectroscopy which shows a doublet
mainly below 400 nm and they are slightly elongated when compared with regular QDs.
MSNCs have been the source of inspiration for us and we continue to explore this
chemistry for high end nanotechnology for device application e.g. Solar cells and LEDs.
Early stage nano clusters can alter the face of nanotechnology as these have potential
applications in white light emitting devices. Selenadiazoles are normally thermally &
photochemically labile particularly where there is a direct –N=N- involved and therefore
can undergo decomposition to extrude nitrogen and selenium easily. Due to this these
are proven to be excellent precursors for ligand chemistry, medicinal chemistry, material
chemistry and nanotechnology. In nanotechnology selenadiazoles are useful for the
synthesis of quantum dots and magic sized nano-clusters.
2.8
2.6
2.4
Density distribution q3*
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.6 0.8 1.0
2
4
6 8 10
particle size / nm
20
40
60
80 100
References:
1. P. K. Khanna, Journal of Nanoscience and Nanotechnology, 11, 1, 2011.
2. P. K. Khanna, R. M. Gorte, R. Gokhale, Material Letters 58, 966, 2004.
3. P. K. Khanna, Priyesh More, Rahul Shewate, R. K. Beri, A. Kasi Viswanath, Vidyanand
Singh, Bodh R. Mehta, Chemistry Letters, 38, 7, 2009.
4. Chacogenadiazoles-chemistryand Applications. Taylor & Francis Group, LLC, 215,
2012.
5. Shanmurgam Muthusubramanian et al, J. chem. Sci. 124, 2, 463,2012.
6. F. Cervantes-Le and et al, J. Organomet. Chem., 562, 29,1998.
7. G. D. Jonathan, S. A. Michael and et al, Proc. of SPIE 6337, 63370A, 2006