Academic Journal
Ionic Polymer Microactuator Activated by Photoresponsive Organic Proton Pumps
| العنوان: | Ionic Polymer Microactuator Activated by Photoresponsive Organic Proton Pumps |
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| المؤلفون: | Khaled M. Al-Aribe, George K. Knopf, Amarjeet S. Bassi |
| المصدر: | Actuators, Vol 4, Iss 4, Pp 237-254 (2015) |
| بيانات النشر: | MDPI AG, 2015. |
| سنة النشر: | 2015 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Production of electric energy or power. Powerplants. Central stations |
| مصطلحات موضوعية: | microfluidics, lab-on-chip, bacteriorhodopsin, proton pumps, molecular self-assembly, micro-actuation, pH-sensitive hydrogels, Materials of engineering and construction. Mechanics of materials, TA401-492, Production of electric energy or power. Powerplants. Central stations, TK1001-1841 |
| الوصف: | An ionic polymer microactuator driven by an organic photoelectric proton pump transducer is described in this paper. The light responsive transducer is fabricated by using molecular self-assembly to immobilize oriented bacteriorhodopsin purple membrane (PM) patches on a bio-functionalized porous anodic alumina (PAA) substrate. When exposed to visible light, the PM proton pumps produce a unidirectional flow of ions through the structure’s nano-pores and alter the pH of the working solution in a microfluidic device. The change in pH is sufficient to generate an osmotic pressure difference across a hydroxyethyl methacrylate-acrylic acid (HEMA-AA) actuator shell and induce volume expansion or contraction. Experiments show that the transducer can generate an ionic gradient of 2.5 μM and ionic potential of 25 mV, producing a pH increase of 0.42 in the working solution. The ΔpH is sufficient to increase the volume of the HEMA-AA microactuator by 80%. The volumetric transformation of the hydrogel can be used as a valve to close a fluid transport micro-channel or apply minute force to a mechanically flexible microcantilever beam. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2076-0825 |
| Relation: | http://www.mdpi.com/2076-0825/4/4/237; https://doaj.org/toc/2076-0825 |
| DOI: | 10.3390/act4040237 |
| URL الوصول: | https://doaj.org/article/a589b2c25a4e49698daec6f062c47cfd |
| رقم الانضمام: | edsdoj.589b2c25a4e49698daec6f062c47cfd |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20760825 |
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| DOI: | 10.3390/act4040237 |