Generation of ultra-small InN nanocrystals by pulsed laser ablation of suspension in organic solution
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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 nanocrystals (InN-NCs) to reveal the characteristic features, which gain interest in the literature. Here, we proposed a new approach for the synthesis of ultra-small hexagonal InN-NCs by using suspension of micron-sized InN powder in ethanol with pulsed laser ablation method. The liquid environment, laser energy and ablation time were optimized and a post-synthesis treatment, centrifugation, was performed to achieve InN-NCs with the smallest size. Besides, the micron-sized InN powder suspension, as a starting material, enabled us to obtain InN-NCs having diameters smaller than 5 nm. We also presented a detailed characterization of InN-NCs and demonstrated that the formation mechanism mainly depends on the fragmentation due to laser irradiation of the suspension.
KeywordsLaser Energy In2O3 Pulse Laser Ablation Ablation Time Nanoparticle Production
This research was partially supported by TÜBA-GEBİP. We thank Hüseyin Avni Vural for his assistance with RAMAN investigation. We would also like to show our gratitude to Dr. Tolga Bağcı for reading and making comments that improved the manuscript.