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dc.contributor.authorZhang, Hui
dc.contributor.authorYu, Junlai
dc.contributor.authorSun, Caixia
dc.contributor.authorXu, Wenhao
dc.contributor.authorChen, Jie
dc.contributor.authorSun, Hui
dc.contributor.authorZong, Chen
dc.contributor.authorLiu, Zhen
dc.contributor.authorTang, Yun
dc.contributor.authorZhao, Dongyuan
dc.date.accessioned2020-12-22T00:05:41Z
dc.date.available2020-12-22T00:05:41Z
dc.date.issued2020
dc.identifier.issn0002-7863
dc.identifier.doi10.1021/jacs.0c07274
dc.identifier.urihttp://hdl.handle.net/10072/400476
dc.description.abstractWater-soluble doped quantum dots have unique photophysical properties and functionalities as optical labels for bioimaging and chemo-/biosensing. However, doping in quantum dots is not easy due to the dopant-ion size mismatch and "self-purification"effect. Here, we demonstrate a successful preparation of Mn-, Cu-, and Ni-doped CdS quantum dots with bimetallic clusters instead of ions as building blocks under mild aqueous conditions up to gram scale. The representative Mn-doped quantum dots have uniform size, about 3.2 ± 0.5 nm, and emit at 620 nm. The doping concentration can be adjusted in the range 6.4%-25.7%. On the premise of good water solubility, they are stable and nontoxic so as to be directly used for cell imaging. Copper and nickel doping have similar results. Because of the close sizes of bimetallic clusters and the low reaction temperature, the challenges posed by dopant size mismatch and ion diffusion are ignored. X-ray absorption fine structure analysis proves that dopants are inside the quantum dots rather than on the surface, indicating that the "self-purification"effect can be effectively overcome. Furthermore, codoped ZnS quantum dots with adjustable emission are achieved, which validates the versatility of our new approach.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS Publications)
dc.relation.ispartofpagefrom16177
dc.relation.ispartofpageto16181
dc.relation.ispartofissue38
dc.relation.ispartofjournalJournal of the American Chemical Society
dc.relation.ispartofvolume142
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchcode34
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsChemistry, Multidisciplinary
dc.subject.keywordsChemistry
dc.subject.keywordsCOLLOIDAL NANOCRYSTALS
dc.titleAn Aqueous Route Synthesis of Transition-Metal-Ions-Doped Quantum Dots by Bimetallic Cluster Building Blocks
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZhang, H; Yu, J; Sun, C; Xu, W; Chen, J; Sun, H; Zong, C; Liu, Z; Tang, Y; Zhao, D, An Aqueous Route Synthesis of Transition-Metal-Ions-Doped Quantum Dots by Bimetallic Cluster Building Blocks, Journal of the American Chemical Society, 2020, 142 (38), pp. 16177-16181
dc.date.updated2020-12-22T00:03:56Z
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Dongyuan


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