Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media
Aggregation and self-assembly are influenced by molecular interactions. With precise control of molecular interactions, in this study, a wide range of nanostructures ranging from zero-dimensional nanospheres to hierarchical nanoplates and spindles have been successfully synthesized at ambient temper...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2017-02-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.8.53 |
| _version_ | 1819103053901463552 |
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| author | Ruchi Deshmukh Anurag Mehra Rochish Thaokar |
| author_facet | Ruchi Deshmukh Anurag Mehra Rochish Thaokar |
| author_sort | Ruchi Deshmukh |
| collection | DOAJ |
| description | Aggregation and self-assembly are influenced by molecular interactions. With precise control of molecular interactions, in this study, a wide range of nanostructures ranging from zero-dimensional nanospheres to hierarchical nanoplates and spindles have been successfully synthesized at ambient temperature in aqueous solution. The nanostructures reported here are formed by aggregation of spherical seed particles (monomers) in presence of quaternary ammonium salts. Hydroxide ions and a magnetic moment of the monomers are essential to induce shape anisotropy in the nanostructures. The cobalt nanoplates are studied in detail, and a growth mechanism based on collision, aggregation, and crystal consolidation is proposed based on a electron microscopy studies. The growth mechanism is generalized for rods, spindles, and nearly spherical nanostructures, obtained by varying the cation group in the quaternary ammonium hydroxides. Electron diffraction shows different predominant lattice planes on the edge and on the surface of a nanoplate. The study explains, hereto unaddressed, the temporal evolution of complex magnetic nanostructures. These ferromagnetic nanostructures represent an interesting combination of shape anisotropy and magnetic characteristics. |
| first_indexed | 2024-12-22T01:44:21Z |
| format | Article |
| id | doaj.art-a2c92bd010104ef9b32d1ffc93990e7b |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-22T01:44:21Z |
| publishDate | 2017-02-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-a2c92bd010104ef9b32d1ffc93990e7b2022-12-21T18:43:07ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862017-02-018149450510.3762/bjnano.8.532190-4286-8-53Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous mediaRuchi Deshmukh0Anurag Mehra1Rochish Thaokar2Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, IndiaDepartment of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, IndiaDepartment of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, IndiaAggregation and self-assembly are influenced by molecular interactions. With precise control of molecular interactions, in this study, a wide range of nanostructures ranging from zero-dimensional nanospheres to hierarchical nanoplates and spindles have been successfully synthesized at ambient temperature in aqueous solution. The nanostructures reported here are formed by aggregation of spherical seed particles (monomers) in presence of quaternary ammonium salts. Hydroxide ions and a magnetic moment of the monomers are essential to induce shape anisotropy in the nanostructures. The cobalt nanoplates are studied in detail, and a growth mechanism based on collision, aggregation, and crystal consolidation is proposed based on a electron microscopy studies. The growth mechanism is generalized for rods, spindles, and nearly spherical nanostructures, obtained by varying the cation group in the quaternary ammonium hydroxides. Electron diffraction shows different predominant lattice planes on the edge and on the surface of a nanoplate. The study explains, hereto unaddressed, the temporal evolution of complex magnetic nanostructures. These ferromagnetic nanostructures represent an interesting combination of shape anisotropy and magnetic characteristics.https://doi.org/10.3762/bjnano.8.53Brownian motioncobalt nanoplateselectron microscopyhierarchical nanostructuresmagnetic momenttetramethylazanium hydroxide (TMAH) |
| spellingShingle | Ruchi Deshmukh Anurag Mehra Rochish Thaokar Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media Beilstein Journal of Nanotechnology Brownian motion cobalt nanoplates electron microscopy hierarchical nanostructures magnetic moment tetramethylazanium hydroxide (TMAH) |
| title | Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| title_full | Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| title_fullStr | Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| title_full_unstemmed | Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| title_short | Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| title_sort | formation and shape control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media |
| topic | Brownian motion cobalt nanoplates electron microscopy hierarchical nanostructures magnetic moment tetramethylazanium hydroxide (TMAH) |
| url | https://doi.org/10.3762/bjnano.8.53 |
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