Volume 84, Number 4, November 2008
Article Number 47001
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 22 October 2008
EPL, 84 (2008) 47001
DOI: 10.1209/0295-5075/84/47001

CdSe nanoparticles synthesized by laser ablation

N. 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 II$\hbox{--}$VI semiconductor CdSe were synthesized by laser ablation (387 nm, 180 fs, 1 kHz, pulse energy = 4 $\mu$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 $\approx$ 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.

© EPLA 2008