The role of alkane chain in primary amine capped CdSe and CdS quantum dots from first-principles
© 2021 IOP Publishing Ltd..
In this study, we performab initiocalculations, using density functional theory, to provide more insights about the role of alkane chain in primary amine capped (CdSe)33and (CdS)33quantum dots (QDs). We passivate the QDs surfaces with seven primary amines of different carbon chain lengths starting from NH3to hexylamine. The primary amine ligands induce a blue shift in the band gap of the ligated QDs, in agreement with experimental studies, but the alkane chain itself show negligible changes in the band gap. By increasing the chain length the binding energy between ligands and the QDs increases but its rate decreases due to the increase of steric hindrance between the ligands. The role of van der Waals forces in such behavior is found to be notable which is done by performing geometry optimization through adding and neglecting the dispersion correction effects for each system. The results of this study can provide helpful information for ligand selectivity in controlling the size and properties of the QDs using primary amines.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:32 |
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| Enthalten in: |
Nanotechnology - 32(2021), 47 vom: 01. Sept. |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Shakiba, Mohammad [VerfasserIn] |
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| Links: |
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| Themen: |
Alkane chain |
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| Anmerkungen: |
Date Revised 02.09.2021 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1088/1361-6528/abed76 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM322484006 |
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| 245 | 1 | 4 | |a The role of alkane chain in primary amine capped CdSe and CdS quantum dots from first-principles |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2021 IOP Publishing Ltd. | ||
| 520 | |a In this study, we performab initiocalculations, using density functional theory, to provide more insights about the role of alkane chain in primary amine capped (CdSe)33and (CdS)33quantum dots (QDs). We passivate the QDs surfaces with seven primary amines of different carbon chain lengths starting from NH3to hexylamine. The primary amine ligands induce a blue shift in the band gap of the ligated QDs, in agreement with experimental studies, but the alkane chain itself show negligible changes in the band gap. By increasing the chain length the binding energy between ligands and the QDs increases but its rate decreases due to the increase of steric hindrance between the ligands. The role of van der Waals forces in such behavior is found to be notable which is done by performing geometry optimization through adding and neglecting the dispersion correction effects for each system. The results of this study can provide helpful information for ligand selectivity in controlling the size and properties of the QDs using primary amines | ||
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| 700 | 1 | |a Sharafi, Shahriar |e verfasserin |4 aut | |
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