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The characterization of AlGaN nanowires prepared via chemical vapor deposition

  • Renjie Jiang
  • Xianquan MengEmail author
Article
  • 16 Downloads

Abstract

AlGaN ternary alloys exhibit some superior properties due to their tunable direct band gap and make them widely used in the fabrication of electronic and optoelectronic devices. Here, we successfully synthesized AlGaN nanowires by chemical vapor deposition using Al powder, Ga droplet and ammonia as starting materials with Pd as catalyst under a moderate growth temperature. The role of Pd catalyst during the growth has been systematically studied. We found that not only the Pd catalyst is the key to the growth of AlGaN nanowires in large scale, but also the sizes of catalyst nanoparticles have an important effect on diameter distribution of nanowires. XRD and HRTEM measurements confirmed that the synthesized AlGaN nanowires are the wurtzite structure and grown along [001] direction. The growth time and ammonia flow have important influence on the morphology of the AlGaN nanostructures. Based on the evolution of the nanostructures, we verified that the growth of the AlGaN nanostructures are affected by both VLS and VS mechanism and explained the growth process.

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China under Grant (No. U1631110).

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Physics and Technology, and Center for Nanoscience and Nanotechnology School of Physics and TechnologyWuhan UniversityWuhanPeople’s Republic of China
  2. 2.Hubei Nuclear Solid Physics Key LaboratoryHubeiPeople’s Republic of China

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