Growth model of tetrapod zinc oxide particles

Iwanaga, Hiroshi; Fujii, M.; Takeuchi, Shin

doi:10.1016/0022-0248(93)90136-k

Cited by 109 publications

(59 citation statements)

References 11 publications

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“…Various models have been proposed for the growth process of the tetrahedral ZnO particles. [18][19][20] Among these models, however, only the so-called octa-twin model by Iwanaga et al can successfully explain the prototype angle relationship of the tetrapods. [19,20] According to this model, the center nucleus is an octahedral multiple-inversion twin consisting of eight trigonal pyramidal crystals with a {0001} basal plane and three {112 2} twin planes (see Supporting Information, Fig.…”

Section: Full Papermentioning

confidence: 99%

ZnO Nanotetrapods: Controlled Vapor‐Phase Synthesis and Application for Humidity Sensing

Qiu

Yang

2007

Adv Funct Materials

235

168

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A systematic study on controlled synthesis of ZnO nanotetrapods by combining metal‐vapor transport, oxidative nucleation/growth, fast‐flow quenching, and water‐assisted cleaning is reported. The technique developed in this work makes possible the fabrication of ZnO nanotetrapods with different morphologies, with arm diameters down to 17 nm, and with arm lengths ranging from 50 nm up to a few micrometers. The octa‐twin model is verified for the growth of the ZnO nanotetrapods. Photoluminescence (PL) studies indicate a higher level of surface and subsurface oxygen vacancies for smaller ZnO nanotetrapods. The ZnO nanotetrapods are first used for the fabrication of resistor‐type humidity sensors, which show high sensitivity, quick response/recovery, long lifetime, and a wide range of humidity response. These favorite characteristics of the humidity sensors are ascribed to the unique morphology of the nanotetrapods, which can create a film with faceted pores and large internal surfaces.

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Section: Full Papermentioning

confidence: 99%

ZnO Nanotetrapods: Controlled Vapor‐Phase Synthesis and Application for Humidity Sensing

Qiu

Yang

2007

Adv Funct Materials

235

168

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“…The formation of the multipod flower-like ZnO nanowires crystals is attributed to the difference in the growth rate of the various crystal facets. According to the lowest surface energy principle, the ZnO nuclei will be exposed at the crystal surfaces with the lowest energy [38]. Then the ZnO nanowires sprouted from these nuclei surfaces and grew along the [0001] direction because the surface energy of the (0002) facet is the lowest.…”

Section: Discussion Of Growth Mechanismmentioning

confidence: 99%

Fabrication, Structural Characterization and Optical Properties of the Flower-Like ZnO Nanowires

Feng

Liu

et al. 2010

Acta Phys. Pol. A

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Multipod flower-like zinc oxide (ZnO) nanowires have been successfully synthesized on Si(111) substrates using a pulsed laser deposition prepared Zn film as "self-catalyst" by the simple thermal evaporation oxidation of the metallic zinc powder at 850• C without any other catalysts or additives. The pre-deposited Zn films by pulsed laser deposition on the substrates can promote the formation of the ZnO nuclei effectively. Also it can further advance the growth of the flower-like ZnO nanowires accordingly. X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, Fourier transform infrared spectrum, and photoluminescence were used to analyze the structure, morphology, composition and optical properties of the as-synthesized products. The results demonstrate that the nanowires were single crystalline with hexagonal wurzite structure, grown along the [0001] in the c-axis direction. Room temperature photoluminescence spectrum of the ZnO nanowires shows a nearband-edge ultraviolet emission (peak at ≈ 384 nm) and a deep-level green emission (peak at ≈ 513 nm). In addition, the growth mechanism of the flower-like ZnO nanowires is discussed in detail.

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“…Further away from the boat, smokes are micro-prisms of hexagonal wurtzite structure elongated along the c axis, most of them are twinned as tetrapods with four legs connected to a common octahedral nucleus. According to the different authors, the structure of this nucleus is of blende type [14,15] or wurtzite type [16,17]. Our HRTEM images give further arguments to determine this structure.…”

Section: Introductionmentioning

confidence: 87%

“…ZnO smokes have been widely studied for their interesting growth mechanism and twinnings [14][15][16][17]. They were produced by oxidation of the Zn metal heated at high temperature in a boat under Oxygen pressure.…”

Section: Introductionmentioning

confidence: 99%

HRTEM Studies of the Epitaxial Growth of Pd Particles (1-6 nm) on ZnO Micro-Prisms

Giorgio

Henry

Chapon

1995

Microsc. Microanal. Microstruct.

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Growth model of tetrapod zinc oxide particles

Cited by 109 publications

References 11 publications

ZnO Nanotetrapods: Controlled Vapor‐Phase Synthesis and Application for Humidity Sensing

ZnO Nanotetrapods: Controlled Vapor‐Phase Synthesis and Application for Humidity Sensing

Fabrication, Structural Characterization and Optical Properties of the Flower-Like ZnO Nanowires

HRTEM Studies of the Epitaxial Growth of Pd Particles (1-6 nm) on ZnO Micro-Prisms

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