Synthesis of scheelite-type nanocolloidal particles by pulsed laser ablation in liquid and their size distribution analysis

Jung-Il Lee (이정일); Kwang Bo Shim (심광보); Jeong-ho Ryu (류정호)

doi:10.6111/JKCGCT.2014.24.3.111

Synthesis of scheelite-type nanocolloidal particles by pulsed laser ablation in liquid and their size distribution analysis

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2014, 24(3), pp.111-119
DOI : 10.6111/JKCGCT.2014.24.3.111
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Jung-Il Lee ¹, Kwang Bo Shim ², Jeong-ho Ryu ¹

¹한국교통대학교
²한양대학교

Accredited

ABSTRACT

A novel pulsed laser ablation process in liquid was investigated to prepare scheelite-type ceramic [calciumtungstate (CaWO4) and calcium molybdate (CaMoO4)] nanocolloidal particles. The crystalline phase, particle morphology,particle size distribution, absorbance and optical band-gap were investigated. Stable colloidal suspensions consisting of welldispersedCaWO4 and CaMoO4 nanoparticles with narrow size distribution could be obtained without any surfactant. Particle tracking analysis using optical microscope combined with image analysis was applied for a fast determination ofparticle size distribution in the prepared nanocolloidal suspensions. The mean nanoparticle size of CaWO4 and CaMoO4colloidal nanoparticles were 16 nm and 30 nm, with the standard deviations of 2.1 and 5.2 nm, respectively. The opticalabsorption edges showed blue-shifted values about 60~70 nm than those of reported in bulk crystals. And also, theestimated optical energy band-gaps of CaWO4 and CaMoO4 colloidal particles were 5.2 and 4.7 eV. The observed band-gapwidening and blue-shift of the optical absorbance could be ascribed to the quantum confinement effect due to the verysmall size of the CaWO4 and CaMoO4 nanocolloidal particles prepared by pulsed laser ablation in liquid.

KEYWORDS

Pulsed laser ablation, Nanocolloidal suspensions, CaWO4 and CaMoO4, Size distribution, Particle tracking analysis, Blue-shift

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Synthesis of scheelite-type nanocolloidal particles by pulsed laser ablation in liquid and their size distribution analysis

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* References for papers published after 2023 are currently being built.

Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Synthesis of scheelite-type nanocolloidal particles by pulsed laser ablation in liquid and their size distribution analysis

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