CW laser generation of titanium oxide nanoparticles in liquid: Characterisation and phase investigation

Sohaib Khan (Lead / Corresponding author), Yudie Yuan, A. Abdolvand, P. Crouse, M. Schmidt, L. Li, Z. Liu

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Compared with laser ablation in the gas phase, requiring a vacuum tight chamber and precise control of pressure and gas flow, the generation of nanoparticles via laser ablation in liquid (LAL) offers significant advantages. LAL facilitates the production of crystalline nanoparticles in a single-step procedure without subsequent heat-treatment. The entire product can be collected in solution, which simplifies handling. Up to now, most research activities have concentrated on the use of pulsed lasers, with pulse width in the range of ns to fs. In this work, we report on the generation of TiO2 spherical nanoparticles using continuous wave (CW) fiber laser by ablating pure Ti submerged both in water and in 0.01M sodium dodecyl sulphate (SDS) solution. The wavelength of the fiber laser used was 1070 nm with an irradiance of 20 MW/cm2, at a power level of 250 W using an exposure time of 1s. Characterization of the nanoparticles, in terms of morphology, chemical analysis and phase structure, was carried out by the means of transmission electron microscopy (TEM), high resolution TEM and X-ray diffractometry (XRD). Results showed the mean size of TiO2 nanoparticles generated in water to be 23 nm with only anatase being detected, while the mean size of the TiO 2 nanoparticles generated in 0.01M SDS solution was 28 nm, consisting of both rutile and anatase phases.

    Original languageEnglish
    Title of host publication26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings
    PublisherLaser Institute of America
    PagesN205
    Number of pages1
    ISBN (Electronic)9780912035888, 0912035889
    Publication statusPublished - 2007
    Event26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Orlando, FL, United States
    Duration: 29 Oct 20071 Nov 2007

    Conference

    Conference26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007
    CountryUnited States
    CityOrlando, FL
    Period29/10/071/11/07

    Keywords

    • Laser microprocessing
    • LIA
    • Materials processing
    • Microprocessing
    • Nanomanufacturing

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