Electro-osmotic diode based on colloidal nano-valves between double membranes
The rectification of electro-osmotic flows is important in micro- and nano-fluidics applications such as micropumps and energy conversion devices. Here, we propose a simple electro-osmotic diode in which colloidal particles are contained between two parallel membranes with different pore densities....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.033289 |
| _version_ | 1797210949611945984 |
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| author | Shihori Koyama Daisuke Inoue Akihisa Okada Hiroaki Yoshida |
| author_facet | Shihori Koyama Daisuke Inoue Akihisa Okada Hiroaki Yoshida |
| author_sort | Shihori Koyama |
| collection | DOAJ |
| description | The rectification of electro-osmotic flows is important in micro- and nano-fluidics applications such as micropumps and energy conversion devices. Here, we propose a simple electro-osmotic diode in which colloidal particles are contained between two parallel membranes with different pore densities. While the flow in the forward direction just pushes the colloidal particles toward the high-pore-density membrane, the backward flow is blocked by the particles near the low-pore-density membrane, which clog the pores. Nonequilibrium molecular dynamics simulations show a strong nonlinear dependence on the electric field for both the electric current and electro-osmotic flow, indicating diode characteristics. A mathematical model to reproduce the electro-osmotic diode behavior is constructed, introducing an effective pore diameter as a model for pores clogged by the colloidal particles. Good agreement is obtained between the proposed model with estimated parameter values and the results of direct molecular dynamics simulations. The proposed electro-osmotic diode has potential application in downsized microfluidic pumps, e.g., the pump induced under AC electric fields. |
| first_indexed | 2024-04-24T10:18:43Z |
| format | Article |
| id | doaj.art-bae6138ff524495bba67d486346b798f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:18:43Z |
| publishDate | 2021-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-bae6138ff524495bba67d486346b798f2024-04-12T17:14:29ZengAmerican Physical SocietyPhysical Review Research2643-15642021-09-013303328910.1103/PhysRevResearch.3.033289Electro-osmotic diode based on colloidal nano-valves between double membranesShihori KoyamaDaisuke InoueAkihisa OkadaHiroaki YoshidaThe rectification of electro-osmotic flows is important in micro- and nano-fluidics applications such as micropumps and energy conversion devices. Here, we propose a simple electro-osmotic diode in which colloidal particles are contained between two parallel membranes with different pore densities. While the flow in the forward direction just pushes the colloidal particles toward the high-pore-density membrane, the backward flow is blocked by the particles near the low-pore-density membrane, which clog the pores. Nonequilibrium molecular dynamics simulations show a strong nonlinear dependence on the electric field for both the electric current and electro-osmotic flow, indicating diode characteristics. A mathematical model to reproduce the electro-osmotic diode behavior is constructed, introducing an effective pore diameter as a model for pores clogged by the colloidal particles. Good agreement is obtained between the proposed model with estimated parameter values and the results of direct molecular dynamics simulations. The proposed electro-osmotic diode has potential application in downsized microfluidic pumps, e.g., the pump induced under AC electric fields.http://doi.org/10.1103/PhysRevResearch.3.033289 |
| spellingShingle | Shihori Koyama Daisuke Inoue Akihisa Okada Hiroaki Yoshida Electro-osmotic diode based on colloidal nano-valves between double membranes Physical Review Research |
| title | Electro-osmotic diode based on colloidal nano-valves between double membranes |
| title_full | Electro-osmotic diode based on colloidal nano-valves between double membranes |
| title_fullStr | Electro-osmotic diode based on colloidal nano-valves between double membranes |
| title_full_unstemmed | Electro-osmotic diode based on colloidal nano-valves between double membranes |
| title_short | Electro-osmotic diode based on colloidal nano-valves between double membranes |
| title_sort | electro osmotic diode based on colloidal nano valves between double membranes |
| url | http://doi.org/10.1103/PhysRevResearch.3.033289 |
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