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Moisture-Induced Degradation of Quantum-Sized Semiconductor Nanocrystals through Amorphous Intermediates

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Title
Moisture-Induced Degradation of Quantum-Sized Semiconductor Nanocrystals through Amorphous Intermediates
Author(s)
Ma, Hyeonjong; Sungsu Kang; Lee, Seunghan; Park, Gisang; Yuna Bae; Park, Gyuri; Jihoon Kim; Li, Shi; Hayeon Baek; Kim, Hyeongseung; Yu, Jong-Sung; Lee, Hoonkyung; Jungwon Park; Yang, Jiwoong
Publication Date
2023-07
Journal
ACS NANO, v.17, no.14, pp.13734 - 13745
Publisher
AMER CHEMICAL SOC
Abstract
Elucidating the water-induced degradation mechanism ofquantum-sizedsemiconductor nanocrystals is an important prerequisite for theirpractical application because they are vulnerable to moisture comparedto their bulk counterparts. In-situ liquid-phasetransmission electron microscopy is a desired method for studyingnanocrystal degradation, and it has recently gained technical advancement.Herein, the moisture-induced degradation of semiconductor nanocrystalsis investigated using graphene double-liquid-layer cells that cancontrol the initiation of reactions. Crystalline and noncrystallinedomains of quantum-sized CdS nanorods are clearly distinguished duringtheir decomposition with atomic-scale imaging capability of the developedliquid cells. The results reveal that the decomposition process ismediated by the involvement of the amorphous-phase formation, whichis different from conventional nanocrystal etching. The reaction canproceed without the electron beam, suggesting that the amorphous-phase-mediateddecomposition is induced by water. Our study discloses unexploredaspects of moisture-induced deformation pathways of semiconductornanocrystals, involving amorphous intermediates.
URI
https://pr.ibs.re.kr/handle/8788114/14402
DOI
10.1021/acsnano.3c03103
ISSN
1936-0851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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