Structural and morphological evolution of ZnO nanostructures promoted by porous SWCNT and highlighting its field emission property

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-03-17 DOI:10.1016/j.diamond.2025.112221

Chandrasekar Perumalveeramalai , Sreenivasulu Kummari V , Thanikaikarasan Sethuramachandran

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Abstract

Carbon nanotubes (SWCNT) have been regarded as one of the ideal substrates for making functional nano- and micro-structures. Zinc oxide nanostructures were grown on porous carbon nanotube substrates selectively via molecular beam epitaxy using solid zinc metal source and molecular oxygen without using any metal catalyst. It is found that the growth of ZnO nanowires on CNT follows the Vapour-Solid (VS) mechanism. ZnO nanowires in the heterostructures have a perfect crystalline structure, while the crystalline structures of the CNTs remain unchanged. The ZnO nanowires that were synthesized demonstrated favorable crystalline and optical characteristics. The field emission properties of as-prepared ZnO/p-SWCNT nanohybrid structures were analyzed in the diode configuration and results indicate that ZnO/p-SWCNT shows the excellent field emission characteristics with low turn-on field of 0.75 V/μm which is comparatively lower than pristine p-SWCNT~0.9 V/μm and pristine ZnO NRs ~1.2 V/μm. These findings demonstrate the viability of ZnO/p-SWCNT as the vacuum electronic applications.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.