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Article: Electron-Beam Induced Water Removal, Phase Change, and Crystallization of Anodic-Electrodeposited Turbostratic Nickel Hydroxide-Oxyhydroxide

TitleElectron-Beam Induced Water Removal, Phase Change, and Crystallization of Anodic-Electrodeposited Turbostratic Nickel Hydroxide-Oxyhydroxide
Authors
KeywordsIn situ transmission electron microscopy (TEM)
Nickel hydroxide-oxyhydroxide
Phase transformation
Turbostratic structures
Issue Date2018
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1862-6319
Citation
Physica Status Solidi A: Applications and Materials Science, 2018, v. 215 n. 23, article no. 1800623 How to Cite?
AbstractWater removal, phase transformation, and crystallization of turbostratic nickel hydroxide and oxyhydroxide (Ni(OH)2‐NiOOH) are found to be inducible by the electron beam of a transmission electron microscope (TEM). Under 30 s of beam exposure at an accelerating voltage of 200 keV and a beam current density of 500 mA m−2, the original, characteristic turbostratic structure of Ni(OH)2‐NiOOH is observed to disappear, caused by the quick removal of intercalated water molecules by the electron beam. Increasing the current density from a low value of 1.5 mA m−2 to a high value of 500 mA m−2 can transform the Ni(OH)2‐NiOOH into nickel oxide (NiO) in 1 min. In situ heating and preheating experiments suggest that the transformation is caused by a heating effect induced by the electron beam. The results confirm that the mechanism previously discovered light‐induced actuation of Ni(OH)2‐NiOOH is caused by desorption of water molecules.
Persistent Identifierhttp://hdl.handle.net/10722/272228
ISSN
2017 Impact Factor: 1.795
2015 SCImago Journal Rankings: 0.712
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorKwan, KW-
dc.contributor.authorXie, D-
dc.contributor.authorZhang, R-
dc.contributor.authorShan, Z-
dc.contributor.authorNgan, AHW-
dc.date.accessioned2019-07-20T10:38:11Z-
dc.date.available2019-07-20T10:38:11Z-
dc.date.issued2018-
dc.identifier.citationPhysica Status Solidi A: Applications and Materials Science, 2018, v. 215 n. 23, article no. 1800623-
dc.identifier.issn1862-6300-
dc.identifier.urihttp://hdl.handle.net/10722/272228-
dc.description.abstractWater removal, phase transformation, and crystallization of turbostratic nickel hydroxide and oxyhydroxide (Ni(OH)2‐NiOOH) are found to be inducible by the electron beam of a transmission electron microscope (TEM). Under 30 s of beam exposure at an accelerating voltage of 200 keV and a beam current density of 500 mA m−2, the original, characteristic turbostratic structure of Ni(OH)2‐NiOOH is observed to disappear, caused by the quick removal of intercalated water molecules by the electron beam. Increasing the current density from a low value of 1.5 mA m−2 to a high value of 500 mA m−2 can transform the Ni(OH)2‐NiOOH into nickel oxide (NiO) in 1 min. In situ heating and preheating experiments suggest that the transformation is caused by a heating effect induced by the electron beam. The results confirm that the mechanism previously discovered light‐induced actuation of Ni(OH)2‐NiOOH is caused by desorption of water molecules.-
dc.languageeng-
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1862-6319-
dc.relation.ispartofPhysica Status Solidi A: Applications and Materials Science-
dc.subjectIn situ transmission electron microscopy (TEM)-
dc.subjectNickel hydroxide-oxyhydroxide-
dc.subjectPhase transformation-
dc.subjectTurbostratic structures-
dc.titleElectron-Beam Induced Water Removal, Phase Change, and Crystallization of Anodic-Electrodeposited Turbostratic Nickel Hydroxide-Oxyhydroxide-
dc.typeArticle-
dc.identifier.emailKwan, KW: kwan15@hku.hk-
dc.identifier.emailNgan, AHW: hwngan@hku.hk-
dc.identifier.authorityNgan, AHW=rp00225-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/pssa.201800623-
dc.identifier.scopuseid_2-s2.0-85054505043-
dc.identifier.hkuros298846-
dc.identifier.volume215-
dc.identifier.issue23-
dc.identifier.spagearticle no. 1800623-
dc.identifier.epagearticle no. 1800623-
dc.identifier.isiWOS:000452297400020-
dc.publisher.placeGermany-

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