Synthesis of blue-shifted luminescent colloidal GaN nanocrystals through femtosecond pulsed laser ablation in organic solution
Date
2016-05Source Title
Journal of Nanoparticle Research
Print ISSN
1388-0764
Publisher
Springer Netherlands
Volume
18
Issue
128
Pages
1 - 10
Language
English
Type
ArticleItem Usage Stats
238
views
views
173
downloads
downloads
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 solutionGallium 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/11693/36904Published Version (Please cite this version)
https://doi.org/10.1007/s11051-016-3440-zCollections
Related items
Showing items related by title, author, creator and subject.
-
Generation of InN nanocrystals in organic solution through laser ablation of high pressure chemical vapor deposition-grown InN thin film
Alkis, S.; Alevli, M.; Burzhuev, S.; Vural, H. A.; Okyay, Ali Kemal; Ortaç, B. (Springer, 2012-07-27)We report the synthesis of colloidal InN nanocrystals (InN-NCs) in organic solution through nanosecond pulsed laser ablation of high pressure chemical vapor deposition-grown InN thin film on GaN/sapphire template substrate. ... -
A plasmonic enhanced photodetector based on silicon nanocrystals obtained through laser ablation
Alkis, S.; Oruç, F. B.; Ortaç, B.; Koşger, A. C.; Okyay, Ali Kemal (Institute of Physics Publishing, 2012-10-18)We present a proof-of-concept photodetector which is sensitive in the visible spectrum. Silicon nanocrystals (Si-NCs) obtained by laser ablation are used as the active absorption region. Si-NC films are formed from a ... -
Generation of ultra-small InN nanocrystals by pulsed laser ablation of suspension in organic solution
Kurşungöz, C.; U. Şimşek, E.; Tuzaklı, R.; Ortaç, B. (Springer Verlag, 2017-03)Nanostructures of InN have been extensively investigated since nano-size provides a number of advantages allowing applications in nanoscale electronic and optoelectronic devices. It is quite important to obtain pure InN ...