Collective behavior of thermally active colloids.
Colloids with patchy metal coating under laser irradiation could act as local heat sources and generate temperature gradients that could induce self-propulsion and interactions between them. The collective behavior of a dilute solution of such thermally active particles is studied using a stochastic...
| Main Author: | |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2012
|
| _version_ | 1797055259320778752 |
|---|---|
| author | Golestanian, R |
| author_facet | Golestanian, R |
| author_sort | Golestanian, R |
| collection | OXFORD |
| description | Colloids with patchy metal coating under laser irradiation could act as local heat sources and generate temperature gradients that could induce self-propulsion and interactions between them. The collective behavior of a dilute solution of such thermally active particles is studied using a stochastic formulation. It is found that when the Soret coefficient is positive, the system could be described in a stationary state by the nonlinear Poisson-Boltzmann equation and could adopt density profiles with significant depletion in the middle region when confined. For colloids with a negative Soret coefficient, the system can be described as a dissipative equivalent of a gravitational system. It is shown that in this case the thermally active colloidal solution could undergo an instability at a critical laser intensity, which has similarities to a supernova explosion. |
| first_indexed | 2024-03-06T19:08:08Z |
| format | Journal article |
| id | oxford-uuid:15d9af0b-83ee-4fbe-9379-b747e66f76ca |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:08:08Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:15d9af0b-83ee-4fbe-9379-b747e66f76ca2022-03-26T10:27:52ZCollective behavior of thermally active colloids.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:15d9af0b-83ee-4fbe-9379-b747e66f76caEnglishSymplectic Elements at Oxford2012Golestanian, RColloids with patchy metal coating under laser irradiation could act as local heat sources and generate temperature gradients that could induce self-propulsion and interactions between them. The collective behavior of a dilute solution of such thermally active particles is studied using a stochastic formulation. It is found that when the Soret coefficient is positive, the system could be described in a stationary state by the nonlinear Poisson-Boltzmann equation and could adopt density profiles with significant depletion in the middle region when confined. For colloids with a negative Soret coefficient, the system can be described as a dissipative equivalent of a gravitational system. It is shown that in this case the thermally active colloidal solution could undergo an instability at a critical laser intensity, which has similarities to a supernova explosion. |
| spellingShingle | Golestanian, R Collective behavior of thermally active colloids. |
| title | Collective behavior of thermally active colloids. |
| title_full | Collective behavior of thermally active colloids. |
| title_fullStr | Collective behavior of thermally active colloids. |
| title_full_unstemmed | Collective behavior of thermally active colloids. |
| title_short | Collective behavior of thermally active colloids. |
| title_sort | collective behavior of thermally active colloids |
| work_keys_str_mv | AT golestanianr collectivebehaviorofthermallyactivecolloids |