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dc.contributor.authorWang, Aixiang
dc.contributor.authorWang, Wenjie
dc.contributor.authorChen, Jiayi
dc.contributor.authorMao, Rundong
dc.contributor.authorPang, Yingping
dc.contributor.authorLi, Yunguo
dc.contributor.authorChen, Wei
dc.contributor.authorChen, Dechao
dc.contributor.authorHao, Derek
dc.contributor.authorNi, Bing-Jie
dc.contributor.authorSaunders, Martin
dc.contributor.authorJia, Guohua
dc.description.abstractPolar surfaces of ionic crystals are of growing technological importance, with implications for the efficiency of photocatalysts, gas sensors, and electronic devices. The creation of ionic nanocrystals with high percentages of polar surfaces is an option for improving their efficiency in the aforementioned applications but is hard to accomplish because they are less thermodynamically stable and prone to vanish during the growth process. Herein, we develop a strategy that is capable of producing polar surface-dominated II-VI semiconductor nanocrystals, including ZnS and CdS, from copper sulfide hexagonal nanoplates through cation exchange reactions. The obtained wurtzite ZnS hexagonal nanoplates have dominant {002} polar surfaces, occupying up to 97.8% of all surfaces. Density functional theory calculations reveal the polar surfaces can be stabilized by a charge transfer of 0.25 eV/formula from the anion-terminated surface to the cation-terminated surface, which also explains the presence of polar surfaces in the initial Cu1.75S hexagonal nanoplates with cation deficiency prior to cation exchange reactions. Experimental results showed that the HER activity could be boosted by the surface polarization of polar surface-dominated ZnS hexagonal nanoplates. We anticipate this strategy is general and could be used with other systems to prepare nanocrystals with dominant polar surfaces. Furthermore, the availability of colloidal semiconductor nanocrystals with dominant polar surfaces produced through this strategy opens a new avenue for improving their efficiency in catalysis, photocatalysis, gas sensing, and other applications.en_US
dc.publisherAmerican Chemical Society (ACS Publications)en_US
dc.relation.ispartofjournalThe Journal of Physical Chemistry Lettersen_US
dc.subject.fieldofresearchPhysical Sciencesen_US
dc.subject.fieldofresearchChemical Sciencesen_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsChemistry, Physicalen_US
dc.subject.keywordsNanoscience & Nanotechnologyen_US
dc.titleDominant Polar Surfaces of Colloidal II-VI Wurtzite Semiconductor Nanocrystals Enabled by Cation Exchangeen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationWang, A; Wang, W; Chen, J; Mao, R; Pang, Y; Li, Y; Chen, W; Chen, D; Hao, D; Ni, B-J; Saunders, M; Jia, G, Dominant Polar Surfaces of Colloidal II-VI Wurtzite Semiconductor Nanocrystals Enabled by Cation Exchange,The Journal of Physical Chemistry Letters, 2020, 11 (13), pp. 4990-4997en_US
gro.hasfulltextNo Full Text
gro.griffith.authorChen, Dechao

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