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Lithium ion as growth-controlling agent of ZnO nanoparticles prepared by organometallic synthesis

Glaria, Arnaud and Kahn, Myrtil L. and Cardinal, Thierry and Senocq, François and Jubera, Véronique and Chaudret, Bruno Lithium ion as growth-controlling agent of ZnO nanoparticles prepared by organometallic synthesis. (2008) New Journal of Chemistry, vol. 32 . pp. 662-669. ISSN 1144-0546

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Official URL: http://dx.doi.org/10.1039/b715583b

Abstract

ZnO nanoparticles were synthesized by adding solid Zn(c-C6H11)2 to a THF solution of the lithium (sodium) precursor and octylamine (OA) as stabilizer. The proportion of Li (Na) was varied from 1 to 10 mol% compared to Zn. Two different lithium precursors namely Li[N(CH3)2] (series 1) and Li[N(Si(CH3)3)2] (series 2) and one sodium precursor namely Na[N(Si(CH3)3)2] (series 3) were used. Interestingly, Li precursors induce a modification of the growth of the particles while, no effect is observed when Na precursors is used. Indeed, isotropic nanoparticles were obtained when Li precursors were used while nanorods were formed with Na precursor as already observed in the same experimental conditions without alkali-metal precursor. Observations by TEM show that as the Li/Zn molar ratio increases, the mean diameters of the nanoparticles vary from 3.7 ± 0.7 nm to 2.5 ± 0.4 nm, and from 4.3 ± 1.0 nm to 3.1 ± 0.8 nm for series 1 and series 2, respectively, while the length and the diameter of the nanorods are ca. 11 × 4 nm, for series 3. Interestingly, the consequence of the lithium induced size variation leads to a shift of the emission band in the visible range, from yellow to blue through white as a function of increasing concentration of lithium precursor. The intensity of this emission is strong enough to be clearly seen by the human eye.

Item Type:Article
Additional Information:Thanks to Royal Society of Chemistry editor. The definitive version is available at http://www.rsc.org The original PDF of the article can be found at New Journal of Chemistry website : http://www.rsc.org/publishing/journals/NJ/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux - ENSCPB (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université de Bordeaux 1 (FRANCE)
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Deposited By: Celine Cabaup

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