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Insights into Nucle...
Insights into Nucleation and Growth of Colloidal Quaternary Nanocrystals by Multimodal X-ray Analysis
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- Just, Justus (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Coughlan, Claudia (författare)
- University of Limerick
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- Singh, Shalini (författare)
- University of Limerick
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- Ren, Huan (författare)
- University of Limerick
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- Müller, Oliver (författare)
- Stanford Linear Accelerator Center (SLAC)
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- Becker, Pascal (författare)
- Helmholtz Association of German Research Centers
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- Unold, Thomas (författare)
- Helmholtz Association of German Research Centers
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- Ryan, Kevin M. (författare)
- University of Limerick
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(creator_code:org_t)
- 2021-03-26
- 2021
- Engelska.
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Ingår i: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 15:4, s. 6439-6447
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://pubs.acs.org...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Copper chalcogenide nanocrystals find applications in photovoltaic inks, bio labels, and thermoelectric materials. We reveal insights in the nucleation and growth during synthesis of anisotropic Cu2ZnSnS4 nanocrystals by simultaneously performing in situ X-ray absorption spectroscopy (XAS) and small-angle X-ray scattering (SAXS). Real-time XAFS reveals that upon thiol injection into the reaction flask, a key copper thiolate intermediate species is formed within fractions of seconds, which decomposes further within a narrow temperature and time window to form copper sulfide nanocrystals. These nanocrystals convert into Cu2ZnSnS4 nanorods by sequentially incorporating Sn and Zn. Real-time SAXS and ex situ TEM of aliquots corroborate these findings. Our work demonstrates how combined in situ X-ray absorption and small-angle X-ray scattering enables the understanding of mechanistic pathways in colloidal nanocrystal formation.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- colloidal nanocrystals
- CZTS
- in situ EXAFS/XANES/SAXS
- nucleation and growth
- quick-EXAFS
- wurtzite
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