A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals
Bismuth selenide‐based nanomaterials are promising candidates for the use as thermoelectrics, and, in addition to this, are currently studied with respect to their topological insulating behavior. Herein, it is reported on the facile synthesis of composition‐tunable colloidal Bi2Sex nanocrystals by...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-05-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400271 |
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| author | Christoph Bauer Felix Anger Philipp Wollmann Karl Hiekel René Hübner Vladimir Lesnyak Alexander Eychmüller |
| author_facet | Christoph Bauer Felix Anger Philipp Wollmann Karl Hiekel René Hübner Vladimir Lesnyak Alexander Eychmüller |
| author_sort | Christoph Bauer |
| collection | DOAJ |
| description | Bismuth selenide‐based nanomaterials are promising candidates for the use as thermoelectrics, and, in addition to this, are currently studied with respect to their topological insulating behavior. Herein, it is reported on the facile synthesis of composition‐tunable colloidal Bi2Sex nanocrystals by reacting selenium precursor in dodecanethiol and oleylamine with presynthesized Bi nanoparticles. To the best of our knowledge, this is the first time that such a wide Bi‐to‐Se ratio‐tunability with simultaneous control over morphology has been achieved in the nanocrystalline Bi2Sex system with an average crystal size below 40 nm. This method is proved to be successful in producing Bi2Se3 compared to employing the coordinating ligand n‐trioctylphosphine (TOP). It is observed that Se can be extracted from Bi2Se3 using TOP, which can result in an approach to induce a holey structuring into sheet‐like Bi2Se3. The final products are characterized with respect to their crystal structure, morphology, and composition. Furthermore, their optical characterization reveals a broad absorption in the visible‐near‐infrared range attributed to a localized surface plasmon resonance. |
| format | Article |
| id | doaj-art-c62fc9bb718b4a35a0e8dffad30e25b5 |
| institution | Kabale University |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-c62fc9bb718b4a35a0e8dffad30e25b52025-08-20T03:52:29ZengWiley-VCHSmall Structures2688-40622025-05-0165n/an/a10.1002/sstr.202400271A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex NanocrystalsChristoph Bauer0Felix Anger1Philipp Wollmann2Karl Hiekel3René Hübner4Vladimir Lesnyak5Alexander Eychmüller6Physical Chemistry TU Dresden Zellescher Weg 19 01069 Dresden GermanyLeibniz Institute for Solid State and Materials Research Dresden Institute for Solid State Research Helmholtzstraße 20 01069 Dresden GermanyElectrochemistry TU Dresden Zellescher Weg 19 01069 Dresden GermanyPhysical Chemistry TU Dresden Zellescher Weg 19 01069 Dresden GermanyHelmholtz‐Zentrum Dresden‐Rossendorf Institute of Ion Beam Physics and Materials Research Bautzner Landstrasse 400 01328 Dresden GermanyPhysical Chemistry TU Dresden Zellescher Weg 19 01069 Dresden GermanyPhysical Chemistry TU Dresden Zellescher Weg 19 01069 Dresden GermanyBismuth selenide‐based nanomaterials are promising candidates for the use as thermoelectrics, and, in addition to this, are currently studied with respect to their topological insulating behavior. Herein, it is reported on the facile synthesis of composition‐tunable colloidal Bi2Sex nanocrystals by reacting selenium precursor in dodecanethiol and oleylamine with presynthesized Bi nanoparticles. To the best of our knowledge, this is the first time that such a wide Bi‐to‐Se ratio‐tunability with simultaneous control over morphology has been achieved in the nanocrystalline Bi2Sex system with an average crystal size below 40 nm. This method is proved to be successful in producing Bi2Se3 compared to employing the coordinating ligand n‐trioctylphosphine (TOP). It is observed that Se can be extracted from Bi2Se3 using TOP, which can result in an approach to induce a holey structuring into sheet‐like Bi2Se3. The final products are characterized with respect to their crystal structure, morphology, and composition. Furthermore, their optical characterization reveals a broad absorption in the visible‐near‐infrared range attributed to a localized surface plasmon resonance.https://doi.org/10.1002/sstr.202400271bismuth selenide nanocrystalschemical conversion of bismuth nanoparticlescolloidal synthesisstructural and optical propertiestunable composition |
| spellingShingle | Christoph Bauer Felix Anger Philipp Wollmann Karl Hiekel René Hübner Vladimir Lesnyak Alexander Eychmüller A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals Small Structures bismuth selenide nanocrystals chemical conversion of bismuth nanoparticles colloidal synthesis structural and optical properties tunable composition |
| title | A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals |
| title_full | A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals |
| title_fullStr | A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals |
| title_full_unstemmed | A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals |
| title_short | A Template‐Based Colloidal Synthesis of Composition‐Tunable Bi2Sex Nanocrystals |
| title_sort | template based colloidal synthesis of composition tunable bi2sex nanocrystals |
| topic | bismuth selenide nanocrystals chemical conversion of bismuth nanoparticles colloidal synthesis structural and optical properties tunable composition |
| url | https://doi.org/10.1002/sstr.202400271 |
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