Optical properties of SnO2 quantum dots synthesized by laser ablation in liquid

Figure shows the synthesis of SnO2 quantum dots by LAL [Display omitted] ► SnO2 quantum dots (QDs) were controllably synthesized by laser ablation in liquid (LAL). ► The photoluminescence (PL) spectrum of such SnO2 QDs exhibits a stronger blue and green emission peak. ► The estimated band gap energy...

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Bibliographic Details
Published in:Chemical physics letters 2012-05, Vol.536, p.87-91
Main Authors: Singh, Manish Kumar, Mathpal, Mohan Chandra, Agarwal, Arvind
Format: Article
Language:English
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Summary:Figure shows the synthesis of SnO2 quantum dots by LAL [Display omitted] ► SnO2 quantum dots (QDs) were controllably synthesized by laser ablation in liquid (LAL). ► The photoluminescence (PL) spectrum of such SnO2 QDs exhibits a stronger blue and green emission peak. ► The estimated band gap energy is 4.37eV for SnO2 QDs. ► SnO2 QDs have potential applications such as optoelectronics, biosensor and other modern technologies. SnO2 quantum dots (QDs) were controllably synthesized by laser ablation in liquid (LAL). The HRTEM image shows that the diameters of the SnO2 nanoparticles fall into a small range of 1–5nm, with the majority being less than the exciton Bohr radius of SnO2 (∼2.7nm). The Selected Area Electron Diffraction (SAED) pattern of SnO2 QDs shows tetragonal crystalline structure. The photoluminescence (PL) spectrum of such SnO2 QDs exhibits blue and green emission peaks at 445nm and 540nm respectively. These QDs have potential future applications in optoelectronics, biosensor and other modern technologies.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2012.03.084