ZnO growth by chemically assisted sublimation

Ntep, J

doi:10.1016/s0022-0248(97)00763-x

Cited by 20 publications

(2 citation statements)

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“…Ntep et al [12,13] have developed a chemically assisted sublimation method based on H 2 , H 2 O or Cl 2 species. Experiments were conducted in closed silica tubes, and crystals reaching the cm 3 size were obtained after 40 days around 1000 1C.…”

Section: Introductionmentioning

confidence: 99%

Chemically assisted vapour transport for bulk ZnO crystal growth

Santailler

Audoin

Chichignoud

et al. 2010

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

Chemically assisted vapour transport for bulk ZnO crystal growth

Santailler

Audoin

Chichignoud

et al. 2010

Journal of Crystal Growth

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“…A wide range of ZnO nanostructures including nanocombs, nanorings, nanobelts, and nanorods can be synthesized using solvothermal, chemical vapor deposition, and solid–vapor thermal sublimation approaches. ,,, Nanorods are typically elongated in the [0001] direction, hexagonal in cross-section, and expose {101̅0} and {112̅0} surfaces along their length. ,,, Nanorods can be arranged into different hierarchical structures offering opportunities to tailor for specific applications. ZnO tetrapods (nanosized rod-shaped ZnO crystals joined to form a tetrahedron) are particularly well studied and have been used as a support for Au NPs for catalytic applications (discussed below).…”

Section: Introductionmentioning

confidence: 99%

First-Principles Investigation of the Structure and Properties of Au Nanoparticles Supported on ZnO

Hung

McKenna

2019

J. Phys. Chem. C

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We present a first-principles investigation of the structure, stability, and reactivity of Au nanoparticles (NPs) supported on ZnO. The morphologies of supported Au NPs are predicted using the formation energy of Au surfaces and the adhesion energy between Au and the dominant ZnO surfaces exposed on ZnO tetrapods. We show how Zn interstitials (a stable intrinsic defect in ZnO) are attracted toward the Au/ZnO interface and in the presence of oxygen can lead to the encapsulation of Au by ZnO, an effect that is observed experimentally. We find that O 2 molecules absorb preferentially at the perimeter of the NP in contact with the ZnO support. These results provide atomistic insight into the structure of ZnO-supported Au NPs with relevance to CO oxidation.

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Growth of ZnO crystals by vapour transport: Some ways to act on physical properties

Tena‐Zaera

Martı́nez-Tomás

Gómez‐García

et al. 2006

Cryst. Res. Technol.

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Nowadays, the growth of ZnO by vapor transport in silica ampoules is generally made in presence of graphite. As it has been already shown, this means that the growth process is carried out in presence of a Zn excess. In order to control that and act, as a consequence, on the physical properties of crystals we have performed a systematic study of the growth process in a wide range of Zn excess compositions using well defined experimental conditions. As a preliminary characterization, optical absorption and electrical properties have been analyzed at room temperature. The results show how some physical properties of asgrown ZnO crystals can be changed in a controlled way by an adequate combination of different growth conditions such as graphite covering of inner ampoule walls, thermal difference between source material and crystallization zone and additional gas (composition and pressure). In this frame some post-growth annealing processes can be avoided reducing the time and cost of processes.

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ZnO growth by chemically assisted sublimation

Cited by 20 publications

References 0 publications

Chemically assisted vapour transport for bulk ZnO crystal growth

Chemically assisted vapour transport for bulk ZnO crystal growth

First-Principles Investigation of the Structure and Properties of Au Nanoparticles Supported on ZnO

Growth of ZnO crystals by vapour transport: Some ways to act on physical properties

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