We report a simple one pot aqueous chemical synthesis route to fabricate very small and highly stable HgTe nanoparticles (NPs) capped with L-cysteine ethyl ester hydrochloride (LEEH). The LEEH concentration has found to be critical for desired size NP synthesis. Structural analyses by grazing angle x-ray diffraction and high resolution electron microscopy studies indicate HgTe NPs to exhibit a fcc phase with prominent reflection having monodispersed NP size of around 2.0 nm. A strong size quantization effect marked by a prominent excitonic absorption at 4.436 eV blueshifted by 4.586 eV from the bulk band gap value has been observed in their optical absorption studies. A strong and narrow Gaussian fluorescence emission at 3.3 eV has been observed for 2.0 nm NP size whose width is being narrowed down with increasing LEEH concentration. The strong UV range absorption and emission have been observed for the first time in HgTe NPs.
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1 November 2009
Research Article|
November 09 2009
Size quantization effect in highly stable UV emitting HgTe nanoparticles: Structure and optical properties
A. M. P. Hussain;
A. M. P. Hussain
Institute of Physics
, Sachivalaya Marg, Bhubaneswar, Orissa 751005, India
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S. N. Sarangi;
S. N. Sarangi
Institute of Physics
, Sachivalaya Marg, Bhubaneswar, Orissa 751005, India
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S. N. Sahu
S. N. Sahu
a)
Institute of Physics
, Sachivalaya Marg, Bhubaneswar, Orissa 751005, India
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a)
Author to whom correspondence should be addressed. electronic mail: [email protected].
J. Appl. Phys. 106, 094306 (2009)
Article history
Received:
July 17 2009
Accepted:
September 22 2009
Citation
A. M. P. Hussain, S. N. Sarangi, S. N. Sahu; Size quantization effect in highly stable UV emitting HgTe nanoparticles: Structure and optical properties. J. Appl. Phys. 1 November 2009; 106 (9): 094306. https://doi.org/10.1063/1.3253331
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