Microwave growth of zinc oxide single crystal microtubes

Jiping Cheng, Ruyan Guo, Yunjin Zhang, Qing Ming Wang

Research output: Contribution to conferencePaper

Abstract

Single crystal zinc oxide (ZnO) microtubes were prepared with cross-sectional dimensions of 100 to 250 microns, lengths of 1-3 millimeters and wall thickness of 1-2 □m by using a microwave heating process at temperatures ranging from 1300-1350°C. The microwave grown ZnO microtubes have hexagonal hollow tubular texture with well faceted ends and side surfaces. Under optical excitation, a strong near band-edge emission was obtained at a peak wavelength of 377.8 nm with a full-width at half-maximum (FWHM) of 11 nm. The ZnO microtubes exhibited highly selective UV light response with a cut-off wavelength of about 370 nm, and excellent electron field emission properties with an emission current density of 11mA/cm2 at an applied field of 20.15 V/□m. These low-cost and high-quality ZnO single crystal microtubes should find their myriad applications in optoelectronics devices including efficient field emission, UV light emission and detection.

Original languageEnglish (US)
Number of pages1
StatePublished - Dec 1 2004
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: Nov 7 2004Nov 12 2004

Other

Other2004 AIChE Annual Meeting
CountryUnited States
CityAustin, TX
Period11/7/0411/12/04

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Zinc oxide
Microwaves
Single crystals
Ultraviolet radiation
Field emission
Wavelength
Microwave heating
Photoexcitation
Full width at half maximum
Optoelectronic devices
Current density
Textures
Electrons
Costs
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Cheng, J., Guo, R., Zhang, Y., & Wang, Q. M. (2004). Microwave growth of zinc oxide single crystal microtubes. Paper presented at 2004 AIChE Annual Meeting, Austin, TX, United States.
Cheng, Jiping ; Guo, Ruyan ; Zhang, Yunjin ; Wang, Qing Ming. / Microwave growth of zinc oxide single crystal microtubes. Paper presented at 2004 AIChE Annual Meeting, Austin, TX, United States.1 p.
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Cheng, J, Guo, R, Zhang, Y & Wang, QM 2004, 'Microwave growth of zinc oxide single crystal microtubes' Paper presented at 2004 AIChE Annual Meeting, Austin, TX, United States, 11/7/04 - 11/12/04, .

Microwave growth of zinc oxide single crystal microtubes. / Cheng, Jiping; Guo, Ruyan; Zhang, Yunjin; Wang, Qing Ming.

2004. Paper presented at 2004 AIChE Annual Meeting, Austin, TX, United States.

Research output: Contribution to conferencePaper

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AU - Cheng, Jiping

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AU - Zhang, Yunjin

AU - Wang, Qing Ming

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N2 - Single crystal zinc oxide (ZnO) microtubes were prepared with cross-sectional dimensions of 100 to 250 microns, lengths of 1-3 millimeters and wall thickness of 1-2 □m by using a microwave heating process at temperatures ranging from 1300-1350°C. The microwave grown ZnO microtubes have hexagonal hollow tubular texture with well faceted ends and side surfaces. Under optical excitation, a strong near band-edge emission was obtained at a peak wavelength of 377.8 nm with a full-width at half-maximum (FWHM) of 11 nm. The ZnO microtubes exhibited highly selective UV light response with a cut-off wavelength of about 370 nm, and excellent electron field emission properties with an emission current density of 11mA/cm2 at an applied field of 20.15 V/□m. These low-cost and high-quality ZnO single crystal microtubes should find their myriad applications in optoelectronics devices including efficient field emission, UV light emission and detection.

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Cheng J, Guo R, Zhang Y, Wang QM. Microwave growth of zinc oxide single crystal microtubes. 2004. Paper presented at 2004 AIChE Annual Meeting, Austin, TX, United States.