Multiscale Carbon Structures Fabricated by Direct Micropatterning of Electrospun Mats of SU-8 Photoresist Nanofibers
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- Multiscale Carbon Structures Fabricated by Direct Micropatterning of Electrospun Mats of SU-8 Photoresist Nanofibers
- Sharma, Chandra S.; Sharma, Ashutosh; Madou, Marc
- Carbon structures; Electrospuns; Hydrophilic carbons; Micro patterning; Micro-domains; Micropatches; Micropatterned; Multiscales; Nanotextured surface; Negative photoresists; Novel methods; Optimized conditions; Ordered array; Polymeric nanofibers; Silicon substrates; SU-8 photoresist; Water contact angle
- Issue Date
- AMER CHEMICAL SOC
- LANGMUIR, v.26, no.4, pp.2218 - 2222
- A novel method for the direct fabrication of arrays of micropatterned polymeric and carbon nanofiber Structures on my substrate is developed. First SU-8, an epoxy-based negative photoresist, is electrospun under optimized conditions to produce a layer of polymeric nanofibers. Next, this nanofibrous mat is micropattererned using photolithography, and Finally, pyrolysis produces ordered arrays of microdomains containing carbon nanofibers. The nanotextured surfaces Of carbon nanofibers are shown to be very hydrophobic (water contact angle similar to 130 degrees). Micropatterning thus generates a substantial wettability contrast of nanofiber domains with intervening micropatches of very hydrophilic carbon (similar to 20 degrees) or silicon substrates.
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