CdSe nanoparticles synthesized by laser ablationN. G. Semaltianos1, S. Logothetidis2, W. Perrie1, S. Romani1, R. J. Potter1, M. Sharp1, P. French1, G. Dearden1 and K. G. Watkins1
1 Department of Engineering, University of Liverpool - Brownlow Hill, Liverpool, L69 3GH, UK, EU
2 Department of Physics, Aristotle University of Thessaloniki - Thessaloniki, GR-54124, Greece, EU
received 10 September 2008; accepted in final form 9 October 2008; published November 2008
published online 22 October 2008
Nanoparticles of the IIVI semiconductor CdSe were synthesized by laser ablation (387 nm, 180 fs, 1 kHz, pulse energy = 4 J (fluence = 1 J/ cm2) of the target material in methanol. The nanoparticles size distribution follows a log-normal function with statistical median diameter in the range of 5 – 6 nm. Their crystalline structure is the same as that of the bulk material and are Se rich (Cd:Se percentage ratio ~ 0.8:1). Strong, spectrally “clean” and relatively narrow photoluminescence emission from the produced nanoparticles was detected in the green (~ 552 nm).
79.20.Ds - Laser-beam impact phenomena.
81.07.Ta - Nanoscale materials and structures: fabrication and characterization: Quantum dots.
78.67.Hc - Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures: Quantum dots.
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