Photoresist derived electrospun carbon nanofibers with tunable morphology and surface properties

Sharma, Chandra S. ; Vasita, Rajesh ; Upadhyay, Devendra K. ; Sharma, Ashutosh ; Katti, Dhirendra S. ; Venkataraghavan, R. (2010) Photoresist derived electrospun carbon nanofibers with tunable morphology and surface properties Industrial & Engineering Chemistry Research, 49 (6). pp. 2731-2739. ISSN 0888-5885

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ie901312j

Related URL: http://dx.doi.org/10.1021/ie901312j

Abstract

A new precursor, SU-8, which is a negative photoresist, was electrospun to produce ultrafine polymeric fibers with a wide range of morphology and wettability characteristics. Electrospun nanofibers of SU-8 were pyrolyzed at 1173 K in an inert atmosphere to give carbon nanofibers. A set of parameters, including electric potential, distance between source and collector, polymer flow rate, and polymer concentration, was optimized for high-viscosity SU-8 photoresist to synthesize long continuous carbon fibers having diameters in the range of 120-600 nm. However, for the same conditions, medium- and lower-viscosity SU-8 yielded beaded fibers and isolated beads, respectively. The wettability of the carbon web was significantly influenced by its surface morphology, as shown by water contact angle measurements. These SU-8-derived carbon nanostructures with tunable surface properties and morphologies could be especially suitable for integration with photoresist-based carbon-MEMS to produce multiscale hierarchal assemblies and could be of potential use in a broad range of applications.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:47002
Deposited On:06 Jul 2011 11:11
Last Modified:06 Jul 2011 11:11

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