Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles
Physical vapour deposition (PVD) is used to grow millimetre-long Bi2 Te3 sub-micron belts catalysed by TiO2 nanoparticles. The catalytic efficiency of TiO2 nanoparticles for the nanostructure growth is compared with the catalyst-free growth employing scanning electron microscopy. The catalyst-coated...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
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SpringerOpen
2016
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| _version_ | 1797069176605507584 |
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| author | Schoenherr, P Zhang, F Kojda, D Mitdank, R Albrecht, M Fischer, S Hesjedal, T |
| author_facet | Schoenherr, P Zhang, F Kojda, D Mitdank, R Albrecht, M Fischer, S Hesjedal, T |
| author_sort | Schoenherr, P |
| collection | OXFORD |
| description | Physical vapour deposition (PVD) is used to grow millimetre-long Bi2 Te3 sub-micron belts catalysed by TiO2 nanoparticles. The catalytic efficiency of TiO2 nanoparticles for the nanostructure growth is compared with the catalyst-free growth employing scanning electron microscopy. The catalyst-coated and catalyst-free substrates are arranged side-by-side, and overgrown at the same time, to assure identical growth conditions in the PVD furnace. It is found that the catalyst enhances the yield of the belts. Very long belts were achieved with a growth rate of 28 nm/min. A ∼1-mm-long belt with a rectangular cross-section was obtained after 8 h of growth. The thickness and width were determined by atomic force microscopy, and their ratio is ∼1:10. The chemical composition was determined to be stoichiometric Bi2Te3 using energy-dispersive X-ray spectroscopy. Temperature-dependent conductivity measurements show a characteristic increase of the conductivity at low temperatures. The room temperature conductivity of 0.20×1^5 S⋅m^−1 indicates an excellent sample quality. |
| first_indexed | 2024-03-06T22:20:35Z |
| format | Journal article |
| id | oxford-uuid:54ec18be-857b-48df-ae4c-8bd2dd145e8d |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:20:35Z |
| publishDate | 2016 |
| publisher | SpringerOpen |
| record_format | dspace |
| spelling | oxford-uuid:54ec18be-857b-48df-ae4c-8bd2dd145e8d2022-03-26T16:40:44ZFree-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticlesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:54ec18be-857b-48df-ae4c-8bd2dd145e8dSymplectic Elements at OxfordSpringerOpen2016Schoenherr, PZhang, FKojda, DMitdank, RAlbrecht, MFischer, SHesjedal, TPhysical vapour deposition (PVD) is used to grow millimetre-long Bi2 Te3 sub-micron belts catalysed by TiO2 nanoparticles. The catalytic efficiency of TiO2 nanoparticles for the nanostructure growth is compared with the catalyst-free growth employing scanning electron microscopy. The catalyst-coated and catalyst-free substrates are arranged side-by-side, and overgrown at the same time, to assure identical growth conditions in the PVD furnace. It is found that the catalyst enhances the yield of the belts. Very long belts were achieved with a growth rate of 28 nm/min. A ∼1-mm-long belt with a rectangular cross-section was obtained after 8 h of growth. The thickness and width were determined by atomic force microscopy, and their ratio is ∼1:10. The chemical composition was determined to be stoichiometric Bi2Te3 using energy-dispersive X-ray spectroscopy. Temperature-dependent conductivity measurements show a characteristic increase of the conductivity at low temperatures. The room temperature conductivity of 0.20×1^5 S⋅m^−1 indicates an excellent sample quality. |
| spellingShingle | Schoenherr, P Zhang, F Kojda, D Mitdank, R Albrecht, M Fischer, S Hesjedal, T Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title | Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title_full | Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title_fullStr | Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title_full_unstemmed | Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title_short | Free-standing millimetre-long Bi2Te3 sub-micron belts catalyzed by TiO2 nanoparticles |
| title_sort | free standing millimetre long bi2te3 sub micron belts catalyzed by tio2 nanoparticles |
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