Growth of Single-sided ZnO nanocombs/ML graphene Heterostructures

Majid S. Al-Ruqeishi, Tariq Mohiuddin

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report catalyst-free growth of high-density single-sided ZnO nanocombs for the first time on a multi-layer graphene (MLG). Structural analysis based on scanning electron microscope reveals the nanocomb ribbon average diameter and length are about 90-600. nm and 5-60. μm, respectively, while the diameter and length of the comb tooth are about 30-100. nm and 100-700. nm respectively. In general, the length of the teeth decreases gradually from one end of the nanocomb ribbon to another. ZnO crystal growth seems to involve two steps which are the formation of Zn buffer layer/graphene, which works as growth nucleation sites and long nanowires ends with nanocombs structure. Raman and PL optical transitions prove the well-faceted hexagonal structure of ZnO nanocombs as well as the existence of defects such as O vacancies and Zn interstitials. Graphene-based inorganic hybrid nanostructures provide several potential applications in optoelectronics and nanoscale electronics such as nanogenerators, photovoltaic devices, optical devices, and photodetectors.

Original languageEnglish
JournalArabian Journal of Chemistry
DOIs
Publication statusAccepted/In press - Mar 3 2015

Fingerprint

Graphite
Graphene
Heterojunctions
Optical transitions
Buffer layers
Optical devices
Photodetectors
Crystallization
Crystal growth
Structural analysis
Optoelectronic devices
Nanowires
Vacancies
Nanostructures
Nucleation
Electronic equipment
Electron microscopes
Scanning
Defects
Catalysts

Keywords

  • Chemical vapor deposition
  • Graphene-semiconductor hybrid
  • Photoluminescence
  • ZnO nanocombs

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Growth of Single-sided ZnO nanocombs/ML graphene Heterostructures. / Al-Ruqeishi, Majid S.; Mohiuddin, Tariq.

In: Arabian Journal of Chemistry, 03.03.2015.

Research output: Contribution to journalArticle

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N2 - We report catalyst-free growth of high-density single-sided ZnO nanocombs for the first time on a multi-layer graphene (MLG). Structural analysis based on scanning electron microscope reveals the nanocomb ribbon average diameter and length are about 90-600. nm and 5-60. μm, respectively, while the diameter and length of the comb tooth are about 30-100. nm and 100-700. nm respectively. In general, the length of the teeth decreases gradually from one end of the nanocomb ribbon to another. ZnO crystal growth seems to involve two steps which are the formation of Zn buffer layer/graphene, which works as growth nucleation sites and long nanowires ends with nanocombs structure. Raman and PL optical transitions prove the well-faceted hexagonal structure of ZnO nanocombs as well as the existence of defects such as O vacancies and Zn interstitials. Graphene-based inorganic hybrid nanostructures provide several potential applications in optoelectronics and nanoscale electronics such as nanogenerators, photovoltaic devices, optical devices, and photodetectors.

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