DataVXAdvanced Optical MaterialsPaper
journal article·2016-01Open access

Surface‐Energy‐Driven Growth of ZnO Hexagonal Microtube Optical Resonators

Jinxin Zhan, Hongxing Dong, Shulin Sun, Xiaodong Ren, Jianjun Liu, Zhanghai Chen, Christoph Lienau, Long Zhang

Advanced Optical Materials· Volume 4· Issue 1
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Source abstract

Abstract

A distinct “split and recoalescence” growth mechanism of tubular ZnO micro/nanostructures is observed for the first time. On the basis of experimental growth studies and first‐principles calculations, it is proposed that H2/H2O vapor, added to the traditional carbothermal reduction process, changes the intrinsic surface energy of ZnO crystal, which affects the ZnO crystal growth mode and subsequently controls the geometry of ZnO micro/nanotubes. It is shown that these tubular ZnO micro/nanostructures exhibit regular hexagonal cross sections and smooth outer and inner surfaces. Optical studies of ZnO micro/nanotubes reveal characteristic coherent intensity modulations of their emission spectra which reflect the excitation of either whispering gallery modes or wave‐guided modes. The specific type of mode can be selected by controlling the microtube geometry, specifically by its wall thickness to diameter ratio, as demonstrated both experimentally by photoluminescence spectroscopy, and theoretically by finite‐element‐method simulations.
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Research context

Nanomaterials

OpenAlex topics: ZnO doping and properties · Advanced Materials and Mechanics · Acoustic Wave Resonator Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Materials for High‐Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Science Shanghai 201800 China

Department of Optical Science and Engineering and Shanghai Engineering Research Center of Ultra‐Precision Optical Manufacturing Fudan University Shanghai 200433 China

State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200083 China

Institute of Physics and Center of Interface Science Carl von Ossietzky Universität Oldenburg Oldenburg D‐26129 Germany

IFSA Collaborative Innovation Center Shanghai Jiao Tong University Shanghai 200240 China

Funding

NSFC · Shanghai Rising-Star Program

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