Bulletin of Materials Science

, Volume 33, Issue 3, pp 221–226

Self-assembled flower-like nanostructures of InN and GaN grown by plasma-assisted molecular beam epitaxy

Authors

  • Mahesh Kumar
    • Materials Research CentreIndian Institute of Science
    • Central Research LaboratoryBharat Electronics
  • T. N. Bhat
    • Materials Research CentreIndian Institute of Science
  • M. K. Rajpalke
    • Materials Research CentreIndian Institute of Science
  • B. Roul
    • Materials Research CentreIndian Institute of Science
    • Central Research LaboratoryBharat Electronics
  • P. Misra
    • Laser Materials Processing DivisionRaja Ramanna Centre for Advanced Technology
  • L. M. Kukreja
    • Laser Materials Processing DivisionRaja Ramanna Centre for Advanced Technology
  • Neeraj Sinha
    • Office of Principal Scientific AdvisorGovernment of India
  • A. T. Kalghatgi
    • Central Research LaboratoryBharat Electronics
    • Materials Research CentreIndian Institute of Science
Article

DOI: 10.1007/s12034-010-0034-8

Cite this article as:
Kumar, M., Bhat, T.N., Rajpalke, M.K. et al. Bull Mater Sci (2010) 33: 221. doi:10.1007/s12034-010-0034-8

Abstract

Nanosized hexagonal InN flower-like structures were fabricated by droplet epitaxy on GaN/Si(111) and GaN flower-like nanostructure fabricated directly on Si(111) substrate using radio frequency plasma-assisted molecular beam epitaxy. Powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study the crystallinity and morphology of the nanostructures. Moreover, X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) were used to investigate the chemical compositions and optical properties of nano-flowers, respectively. Activation energy of free exciton transitions in GaN nano-flowers was derived to be ∼28.5 meV from the temperature dependent PL studies. The formation process of nano-flowers is investigated and a qualitative mechanism is proposed.

Keywords

Nitridesnano-flowersphotoluminescenceRF-MBE

Copyright information

© Indian Academy of Sciences 2010