11 September 2008 The patterning of sub-500 nm inorganic oxide and semiconducting polymeric structures
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The Pattern Replication In Non-wetting Templates (PRINT) technique has been extended to patterning of isolated features as well as embossed films of sub-500 nm "hard" inorganic oxides and nanocrystalline semiconductors and "soft" semiconducting polymers including TiO2, SnO2, ZnO, ITO, BaTiO3, CdSe, poly(3-hexylthiophene) (P3HT), Poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV), and other polythiophene derivatives. The low surface energy, chemically resistant, air permeable elastomeric perflouropolyether (PFPE) based molds allow for numerous materials to be patterned on a variety of substrates including glass, transparent conductive oxides, and thin films of conducting polymer for a wide range of electronic and optical applications. Additionally, PRINT has been employed to pattern features with aspect ratios greater than 1, deposit a second layer of features on top of an initial layer without pattern destruction, and replicate sub-100 nm sized features for photovoltaics applications. Materials and patterns generated in this work were characterized using a variety of techniques including: Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD).
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Meredith J. Hampton, Meredith J. Hampton, Stuart S. Williams, Stuart S. Williams, Zhilian Zhou, Zhilian Zhou, Janine Nunes, Janine Nunes, Doo-Hyun Ko, Doo-Hyun Ko, Joseph L. Templeton, Joseph L. Templeton, Joseph M. DeSimone, Joseph M. DeSimone, Edward T. Samulski, Edward T. Samulski, } "The patterning of sub-500 nm inorganic oxide and semiconducting polymeric structures", Proc. SPIE 7047, Nanoscale Photonic and Cell Technologies for Photovoltaics, 70470T (11 September 2008); doi: 10.1117/12.794890; https://doi.org/10.1117/12.794890

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