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Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets

Phase changes in colloidal semiconductor nanocrystals (NCs) are essential in material design and device applications. However, the transition pathways have yet to be sufficiently studied, and a better understanding of the underlying mechanisms is needed. In this work, a complete ligand-assisted phas...

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Autores principales: Kong, Xinke, Ru, Lin, Ge, Junjun, Deng, Yalei, Zhang, Pan-ke, Wang, Yuanyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10664457/
https://www.ncbi.nlm.nih.gov/pubmed/38023525
http://dx.doi.org/10.1039/d3sc04296k
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author Kong, Xinke
Ru, Lin
Ge, Junjun
Deng, Yalei
Zhang, Pan-ke
Wang, Yuanyuan
author_facet Kong, Xinke
Ru, Lin
Ge, Junjun
Deng, Yalei
Zhang, Pan-ke
Wang, Yuanyuan
author_sort Kong, Xinke
collection PubMed
description Phase changes in colloidal semiconductor nanocrystals (NCs) are essential in material design and device applications. However, the transition pathways have yet to be sufficiently studied, and a better understanding of the underlying mechanisms is needed. In this work, a complete ligand-assisted phase transition from zinc blende (ZB) to wurtzite (WZ) is observed in CdSe nanoplatelets (NPLs). By monitoring with in situ absorption spectra along with electrospray ionization mass spectrometry (ESI-MS), we demonstrated that the transition process is a ligand-assisted covalent inorganic complex (CIC)-mediated phase transition pathway, which involves three steps, ligand exchange on ZB CdSe NPLs (Step 1), dissolution of NPLs to form CICs (Step 2), and conversion of CdSe–CIC assemblies to WZ CdSe NPLs (Step 3). In particular, CICs can be directly anisotropically grown to WZ CdSe NPL without other intermediates, following pseudo-first-order kinetics (k(obs) = 9.17 × 10(−5) s(−1)). Furthermore, we demonstrated that CICs are also present and play an essential role in the phase transition of ZnS NPLs from WZ to ZB structure. This study proposes a new crystal transformation pathway and elucidates a general phase-transition mechanism, facilitating precise functional nanomaterial design.
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spelling pubmed-106644572023-11-08 Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets Kong, Xinke Ru, Lin Ge, Junjun Deng, Yalei Zhang, Pan-ke Wang, Yuanyuan Chem Sci Chemistry Phase changes in colloidal semiconductor nanocrystals (NCs) are essential in material design and device applications. However, the transition pathways have yet to be sufficiently studied, and a better understanding of the underlying mechanisms is needed. In this work, a complete ligand-assisted phase transition from zinc blende (ZB) to wurtzite (WZ) is observed in CdSe nanoplatelets (NPLs). By monitoring with in situ absorption spectra along with electrospray ionization mass spectrometry (ESI-MS), we demonstrated that the transition process is a ligand-assisted covalent inorganic complex (CIC)-mediated phase transition pathway, which involves three steps, ligand exchange on ZB CdSe NPLs (Step 1), dissolution of NPLs to form CICs (Step 2), and conversion of CdSe–CIC assemblies to WZ CdSe NPLs (Step 3). In particular, CICs can be directly anisotropically grown to WZ CdSe NPL without other intermediates, following pseudo-first-order kinetics (k(obs) = 9.17 × 10(−5) s(−1)). Furthermore, we demonstrated that CICs are also present and play an essential role in the phase transition of ZnS NPLs from WZ to ZB structure. This study proposes a new crystal transformation pathway and elucidates a general phase-transition mechanism, facilitating precise functional nanomaterial design. The Royal Society of Chemistry 2023-11-08 /pmc/articles/PMC10664457/ /pubmed/38023525 http://dx.doi.org/10.1039/d3sc04296k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Kong, Xinke
Ru, Lin
Ge, Junjun
Deng, Yalei
Zhang, Pan-ke
Wang, Yuanyuan
Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title_full Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title_fullStr Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title_full_unstemmed Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title_short Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets
title_sort covalent inorganic complexes enabled zinc blende to wurtzite phase changes in cdse nanoplatelets
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10664457/
https://www.ncbi.nlm.nih.gov/pubmed/38023525
http://dx.doi.org/10.1039/d3sc04296k
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