Anisotropy of Hydrogen Diffusivity in ZnO

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10190357" target="_blank" >RIV/00216208:11320/13:10190357 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.scientific.net/DDF.333.39" target="_blank" >http://www.scientific.net/DDF.333.39</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.333.39" target="_blank" >10.4028/www.scientific.net/DDF.333.39</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anisotropy of Hydrogen Diffusivity in ZnO

Popis výsledku v původním jazyce

Hydrogen absorption and diffusivity in high quality ZnO crystals were investigated in this work by X-ray diffraction combined with slow positron implantation spectroscopy and electrical resistometry. ZnO crystals were covered by a thin Pd over-layer andelectrochemically charged with hydrogen. It was found that absorbed hydrogen causes plastic deformation in a subsurface region. The depth profile of hydrogen concentration introduced into the crystal was determined by nuclear reaction analysis. Enhancedhydrogen concentration was found in the subsurface region due to excess hydrogen atoms trapped at defects introduced by plastic deformation. Hydrogen diffusion in ZnO crystals with various orientations was studied by in-situ electrical resistometry. It was found that hydrogen diffusion in the c-direction is faster than hydrogen diffusion in the a-direction most probably due to open channels existing in the wurtzite structure along the c-axis.

Název v anglickém jazyce

Anisotropy of Hydrogen Diffusivity in ZnO

Popis výsledku anglicky

Hydrogen absorption and diffusivity in high quality ZnO crystals were investigated in this work by X-ray diffraction combined with slow positron implantation spectroscopy and electrical resistometry. ZnO crystals were covered by a thin Pd over-layer andelectrochemically charged with hydrogen. It was found that absorbed hydrogen causes plastic deformation in a subsurface region. The depth profile of hydrogen concentration introduced into the crystal was determined by nuclear reaction analysis. Enhancedhydrogen concentration was found in the subsurface region due to excess hydrogen atoms trapped at defects introduced by plastic deformation. Hydrogen diffusion in ZnO crystals with various orientations was studied by in-situ electrical resistometry. It was found that hydrogen diffusion in the c-direction is faster than hydrogen diffusion in the a-direction most probably due to open channels existing in the wurtzite structure along the c-axis.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Defect and Diffusion Forum

ISSN

1012-0386

e-ISSN

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Svazek periodika

333

Číslo periodika v rámci svazku

25 Jan 2013

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

39-49

Kód UT WoS článku

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EID výsledku v databázi Scopus

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