Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles
A thin film containing silica encapsulated face-centered tetragonal FePt nanoparticles was synthesized by using sequential nanochemistry preparation techniques. The silica coating offered the alloy particles a physical barrier against sintering by modifying their diffusion rates and surface energies...
| Główni autorzy: | , , , , |
|---|---|
| Format: | Journal article |
| Język: | English |
| Wydane: |
2006
|
| _version_ | 1826261101896007680 |
|---|---|
| author | Yu, C Caiulo, N Lo, C Tam, K Tsang, S |
| author_facet | Yu, C Caiulo, N Lo, C Tam, K Tsang, S |
| author_sort | Yu, C |
| collection | OXFORD |
| description | A thin film containing silica encapsulated face-centered tetragonal FePt nanoparticles was synthesized by using sequential nanochemistry preparation techniques. The silica coating offered the alloy particles a physical barrier against sintering by modifying their diffusion rates and surface energies during the high-temperature annealing required for the fct phase transition. It was found that each quasi-spherical silica particle embracing the FePt can undergo self-assembly into a closely packed, ordered 2D array structure with identical interparticle spacing on a thin supporting film. A strong chemical attachment of the silica nanosphere to the oxide film was evident through a surface dehydroxylation reaction. A Langmuir-Blodgett (LB) deposition technique to control the arrangement of the silica encapsulated FePt on a substrate was carried out, followed by a high-temperature heat treatment and the heat-treated, silica-encapsulated sample displays magnetic hysteresis. |
| first_indexed | 2024-03-06T19:16:17Z |
| format | Journal article |
| id | oxford-uuid:187cda0c-7d0c-4e96-9a8c-7db40d6eb421 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:16:17Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:187cda0c-7d0c-4e96-9a8c-7db40d6eb4212022-03-26T10:43:35ZSynthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticlesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:187cda0c-7d0c-4e96-9a8c-7db40d6eb421EnglishSymplectic Elements at Oxford2006Yu, CCaiulo, NLo, CTam, KTsang, SA thin film containing silica encapsulated face-centered tetragonal FePt nanoparticles was synthesized by using sequential nanochemistry preparation techniques. The silica coating offered the alloy particles a physical barrier against sintering by modifying their diffusion rates and surface energies during the high-temperature annealing required for the fct phase transition. It was found that each quasi-spherical silica particle embracing the FePt can undergo self-assembly into a closely packed, ordered 2D array structure with identical interparticle spacing on a thin supporting film. A strong chemical attachment of the silica nanosphere to the oxide film was evident through a surface dehydroxylation reaction. A Langmuir-Blodgett (LB) deposition technique to control the arrangement of the silica encapsulated FePt on a substrate was carried out, followed by a high-temperature heat treatment and the heat-treated, silica-encapsulated sample displays magnetic hysteresis. |
| spellingShingle | Yu, C Caiulo, N Lo, C Tam, K Tsang, S Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title | Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title_full | Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title_fullStr | Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title_full_unstemmed | Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title_short | Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles |
| title_sort | synthesis and fabrication of a thin film containing silica encapsulated face centered tetragonal fept nanoparticles |
| work_keys_str_mv | AT yuc synthesisandfabricationofathinfilmcontainingsilicaencapsulatedfacecenteredtetragonalfeptnanoparticles AT caiulon synthesisandfabricationofathinfilmcontainingsilicaencapsulatedfacecenteredtetragonalfeptnanoparticles AT loc synthesisandfabricationofathinfilmcontainingsilicaencapsulatedfacecenteredtetragonalfeptnanoparticles AT tamk synthesisandfabricationofathinfilmcontainingsilicaencapsulatedfacecenteredtetragonalfeptnanoparticles AT tsangs synthesisandfabricationofathinfilmcontainingsilicaencapsulatedfacecenteredtetragonalfeptnanoparticles |