Shape change as an indicator of mechanism in the high-pressure structural transformations of CdSe nanocrystals
X-ray diffraction was used to monitor the structure of 45 A diameter CdSe nanocrystals as they transformed repeatedly between fourfold and sixfold coordinated crystal structures. Simulations of the diffraction patterns reveal that a shape change occurs as the crystals transform. They also show that...
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| Veröffentlicht in: | Physical review letters 2000-01, Vol.84 (5), p.923-926 |
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| container_title | Physical review letters |
| container_volume | 84 |
| creator | Wickham, JN Herhold, AB Alivisatos, AP |
| description | X-ray diffraction was used to monitor the structure of 45 A diameter CdSe nanocrystals as they transformed repeatedly between fourfold and sixfold coordinated crystal structures. Simulations of the diffraction patterns reveal that a shape change occurs as the crystals transform. They also show that stacking faults are generated in the transition from the high- to the low-pressure phase. The shape change and stacking fault generation place significant constraints on the possible microscopic mechanism of the phase transition. |
| doi_str_mv | 10.1103/physrevlett.84.923 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2000-01, Vol.84 (5), p.923-926 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_osti_scitechconnect_20215358 |
| source | American Physical Society Journals |
| subjects | CADMIUM SELENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CRYSTAL STRUCTURE EXPERIMENTAL DATA MATERIALS SCIENCE PHASE TRANSFORMATIONS PRESSURE DEPENDENCE SIMULATION STACKING FAULTS SYNCHROTRON RADIATION X-RAY DIFFRACTION |
| title | Shape change as an indicator of mechanism in the high-pressure structural transformations of CdSe nanocrystals |
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