کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6469673 | 1423976 | 2017 | 5 صفحه PDF | دانلود رایگان |
- A facile double template-assisted procedure to fabricate porous magnetic structures
- Well-defined porosity and interconnectivity inside their architecture
- Stimulus-responsive hydrogels were loaded into the porous structures.
- Magnetic actuation of the microstructures was achieved.
We describe a double template-assisted electrodeposition of porous metal microstructures. The method combines two-dimensional photolithography and electrophoretic assembly of polystyrene beads, in order to confine the electrochemical growth of a porous magnetic cobalt-nickel alloy within well-defined microscale boundaries. Polystyrene beads are electrophoretically deposited onto a sulfonate derivatized gold substrate where a patterned photoresist layer (first template) is applied. The polystyrene beads trapped in the first template act as the second template, and cobalt-nickel alloy is electrochemically grown through the voids between the beads. After removal of both templates, magnetic microstructures with well-defined shapes and porosity are successfully obtained. Additionally, we demonstrate the capabilities of these magnetic microstructures as wireless cargo microtransporters by loading their pores with a stimulus-responsive hydrogel. Magnetic manipulation experiments are also demonstrated.
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Journal: Electrochemistry Communications - Volume 81, August 2017, Pages 97-101