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      Synthesis of blue-shifted luminescent colloidal GaN nanocrystals through femtosecond pulsed laser ablation in organic solution

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      Author(s)
      Demirel, A.
      Öztaş T.
      Kurşungöz, C.
      Yılmaz, İ.
      Ortaç, B.
      Date
      2016-05
      Source Title
      Journal of Nanoparticle Research
      Print ISSN
      1388-0764
      Publisher
      Springer Netherlands
      Volume
      18
      Issue
      128
      Pages
      1 - 10
      Language
      English
      Type
      Article
      Item Usage Stats
      238
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      173
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      Abstract
      We demonstrate the synthesis of GaN nanocrystals (NCs) with the sizes of less than the doubled exciton Bohr radius leading quantum confinement effects via a single-step technique. The generation of colloidal GaN nanoparticles (NPs) in organic solution through nanosecond (ns) and femtosecond (fs) pulsed laser ablation (PLA) of GaN powder was carried out. Ns PLA in ethanol and polymer matrix resulted in amorphous GaN-NPs with the size distribution of 12.4 ± 7.0 and 6.4 ± 2.3 nm, respectively, whereas fs PLA in ethanol produced colloidal GaN-NCs with spherical shape within 4.2 ± 1.9 nm particle size distribution. XRD and selected area electron diffraction analysis of the product via fs PLA revealed that GaN-NCs are in wurtzite structure. Moreover, X-ray photoelectron spectroscopy measurements also confirm the presence of GaN nanomaterials. The colloidal GaN-NCs solution exhibits strong blue shift in the absorption spectrum compared to that of the GaN-NPs via ns PLA in ethanol. Furthermore, the photoluminescence emission behavior of fs PLA-generated GaN-NCs in the 295–400 nm wavelength range is observed with a peak position located at 305 nm showing a strong blue shift with respect to the bulk GaN.
      Keywords
      Femtosecond/nanosecond pulsed laser ablation in organic solution
      Gallium nitride nanoparticles
      Photoluminescence
      Ultrasmall nanocrystal generation
      Ablation
      Absorption spectroscopy
      Electron diffraction
      Ethanol
      Gallium nitride
      Laser ablation
      Nanocrystals
      Nanoparticles
      Organic lasers
      Particle size
      Particle size analysis
      Photoluminescence
      Size distribution
      Ultrafast lasers
      X ray photoelectron spectroscopy
      Zinc sulfide
      Exciton Bohr radius
      Femtosecond pulsed laser ablation
      Gallium nitride nanoparticles
      Organic solutions
      Photoluminescence emission
      Quantum confinement effects
      Selected area electron diffraction analysis
      Ultra-small
      Pulsed lasers
      Gallium nitride nanocrystal
      Nanocrystal
      Nanomaterial
      Nanoparticle
      Polymer
      Quantum dot
      Unclassified drug
      Analytic method
      Article
      Chemical modification
      Colloid
      Crystal structure
      Electron diffraction
      Particle size
      Photoluminescence
      Priority journal
      Pulsed laser ablation
      X ray diffraction
      X ray photoelectron spectroscopy
      Permalink
      http://hdl.handle.net/11693/36904
      Published Version (Please cite this version)
      https://doi.org/10.1007/s11051-016-3440-z
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
      • Nanotechnology Research Center (NANOTAM) 1125
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