Role of Capping Agent in Wet Synthesis of Nanoparticles
© 2017 American Chemical Society. Aqueous-based synthesis is one of the most popular methods to prepare nanoparticles. In these procedures, surfactants are needed to regulate the growth and final particle size. While there are numerous evidence on the decisive role of surfactants, a quantitative des...
| Main Authors: | , |
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| Format: | Journal Article |
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American Chemical Society
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/58419 |
| _version_ | 1848760255353192448 |
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| author | Phan, Chi Nguyen, H. |
| author_facet | Phan, Chi Nguyen, H. |
| author_sort | Phan, Chi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 American Chemical Society. Aqueous-based synthesis is one of the most popular methods to prepare nanoparticles. In these procedures, surfactants are needed to regulate the growth and final particle size. While there are numerous evidence on the decisive role of surfactants, a quantitative description remains elusive. This study develops a theoretical model to correlate the surfactant activities to particle growth. In the model, the "penetrability" of ions within surfactant layer is used to combine surface reaction and adsorption/desorption processes. The penetrability was then directly correlated to surfactant size. The theory was verified by synthesis of iron oxide nanoparticles with series of cationic surfactants. Eight surfactants, with same headgroup and increasing hydrocarbon tail, were employed. The experimental data showed a deterministic correlation between surfactant tails and particle size. The experimental correlation between surfactant length and particle size was predicted by the model. The modeling results verify the role of surfactant as capping agent during particle growth. More importantly, it provides a theoretical framework to control particle size in wet synthesis. |
| first_indexed | 2025-11-14T10:12:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-58419 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:12:52Z |
| publishDate | 2017 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-584192017-11-24T05:45:54Z Role of Capping Agent in Wet Synthesis of Nanoparticles Phan, Chi Nguyen, H. © 2017 American Chemical Society. Aqueous-based synthesis is one of the most popular methods to prepare nanoparticles. In these procedures, surfactants are needed to regulate the growth and final particle size. While there are numerous evidence on the decisive role of surfactants, a quantitative description remains elusive. This study develops a theoretical model to correlate the surfactant activities to particle growth. In the model, the "penetrability" of ions within surfactant layer is used to combine surface reaction and adsorption/desorption processes. The penetrability was then directly correlated to surfactant size. The theory was verified by synthesis of iron oxide nanoparticles with series of cationic surfactants. Eight surfactants, with same headgroup and increasing hydrocarbon tail, were employed. The experimental data showed a deterministic correlation between surfactant tails and particle size. The experimental correlation between surfactant length and particle size was predicted by the model. The modeling results verify the role of surfactant as capping agent during particle growth. More importantly, it provides a theoretical framework to control particle size in wet synthesis. 2017 Journal Article http://hdl.handle.net/20.500.11937/58419 10.1021/acs.jpca.7b02186 American Chemical Society restricted |
| spellingShingle | Phan, Chi Nguyen, H. Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title | Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title_full | Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title_fullStr | Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title_full_unstemmed | Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title_short | Role of Capping Agent in Wet Synthesis of Nanoparticles |
| title_sort | role of capping agent in wet synthesis of nanoparticles |
| url | http://hdl.handle.net/20.500.11937/58419 |