An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes
Arrays of microscale interfaces between two immiscible electrolyte solutions (µITIES) were formed using glass membranes perforated with microscale pores by laser ablation. Square arrays of 100 micropores in 130 µm thick borosilicate glass coverslips were functionalized with trichloro(1H,1H,2H,2H-per...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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American Chemical Society
2016
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| Online Access: | http://purl.org/au-research/grants/arc/LE120100026 http://hdl.handle.net/20.500.11937/45849 |
| _version_ | 1848757399303749632 |
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| author | Alvarez De Eulate, Eva Strutwolf, J. Liu, Yang O'Donnell, Kane Arrigan, Damien |
| author_facet | Alvarez De Eulate, Eva Strutwolf, J. Liu, Yang O'Donnell, Kane Arrigan, Damien |
| author_sort | Alvarez De Eulate, Eva |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Arrays of microscale interfaces between two immiscible electrolyte solutions (µITIES) were formed using glass membranes perforated with microscale pores by laser ablation. Square arrays of 100 micropores in 130 µm thick borosilicate glass coverslips were functionalized with trichloro(1H,1H,2H,2H-perfluorooctyl)silane on one side, to render the surface hydrophobic and support the formation of aqueous-organic liquid-liquid microinterfaces. The pores show a conical shape, with larger radii at the laser entry side (26.5 µm) than at the laser exit side (11.5 µm). The modified surfaces were characterized by contact angle measurements and X-ray photoelectron spectroscopy. The organic phase was placed on the hydrophobic side of the membrane, enabling the array of µITIES to be located at either the wider or narrower pore mouth. The electrochemical behavior of the µITIES arrays were investigated by tetrapropylammonium ion transfer across water-1,6-dichlorohexane interfaces together with finite element computational simulations. The data suggest that the smallest microinterfaces (formed on the laser exit side) were located at the mouth of the pore in hemispherical geometry, while the larger microinterfaces (formed on the laser entry side) were flatter in shape but exhibited more instability due to the significant roughness of the glass around the pore mouths. The glass membrane-supported µITIES arrays presented here provide a new platform for chemical and biochemical sensing systems. © 2016 American Chemical Society. |
| first_indexed | 2025-11-14T09:27:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-45849 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:27:28Z |
| publishDate | 2016 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-458492019-02-19T05:35:17Z An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes Alvarez De Eulate, Eva Strutwolf, J. Liu, Yang O'Donnell, Kane Arrigan, Damien Arrays of microscale interfaces between two immiscible electrolyte solutions (µITIES) were formed using glass membranes perforated with microscale pores by laser ablation. Square arrays of 100 micropores in 130 µm thick borosilicate glass coverslips were functionalized with trichloro(1H,1H,2H,2H-perfluorooctyl)silane on one side, to render the surface hydrophobic and support the formation of aqueous-organic liquid-liquid microinterfaces. The pores show a conical shape, with larger radii at the laser entry side (26.5 µm) than at the laser exit side (11.5 µm). The modified surfaces were characterized by contact angle measurements and X-ray photoelectron spectroscopy. The organic phase was placed on the hydrophobic side of the membrane, enabling the array of µITIES to be located at either the wider or narrower pore mouth. The electrochemical behavior of the µITIES arrays were investigated by tetrapropylammonium ion transfer across water-1,6-dichlorohexane interfaces together with finite element computational simulations. The data suggest that the smallest microinterfaces (formed on the laser exit side) were located at the mouth of the pore in hemispherical geometry, while the larger microinterfaces (formed on the laser entry side) were flatter in shape but exhibited more instability due to the significant roughness of the glass around the pore mouths. The glass membrane-supported µITIES arrays presented here provide a new platform for chemical and biochemical sensing systems. © 2016 American Chemical Society. 2016 Journal Article http://hdl.handle.net/20.500.11937/45849 10.1021/acs.analchem.5b03091 http://purl.org/au-research/grants/arc/LE120100026 http://purl.org/au-research/grants/arc/DP130102040 American Chemical Society fulltext |
| spellingShingle | Alvarez De Eulate, Eva Strutwolf, J. Liu, Yang O'Donnell, Kane Arrigan, Damien An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title | An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title_full | An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title_fullStr | An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title_full_unstemmed | An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title_short | An Electrochemical Sensing Platform Based on Liquid-Liquid Microinterface Arrays Formed in Laser-Ablated Glass Membranes |
| title_sort | electrochemical sensing platform based on liquid-liquid microinterface arrays formed in laser-ablated glass membranes |
| url | http://purl.org/au-research/grants/arc/LE120100026 http://purl.org/au-research/grants/arc/LE120100026 http://hdl.handle.net/20.500.11937/45849 |