Optimization of electrospinning an SU‐8 negative photoresist to create patterned carbon nanofibers and nanobeads

Abstract

The optimization of electrospinning SU-8 2100 negative photoresist was performed to create carbon micro/nanofibers and beads that can be patterned after electrospinning by using UV radiation. The fiber diameters had a range of 300 nm to 1 lm, based upon the selected electrospinning parameters. Low concentrations of the SU-8 2100 resulted in beads while specific higher concentrations produced well-defined fibers. Fibers and beads were converted to carbon through pyrolysis and retained their three dimensional structure. By utilizing the photosensitive properties of the SU-8 negative photoresist, the electrospun fibers were patterned by UV photolithography. The fibers and beads were characterized by SEM and Raman microscopy, respectively. V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: [405][406][407][408][409][410][411][412] 2010

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