Phase Transformation of Titania Domains in the Titania/PDMS Hybrid Particles by Heat Treatment

Nakade, Masato; Ichihashi, Kosuke; Ogawa, Makoto

doi:10.2109/jcersj.113.280

Cited by 1 publication

(2 citation statements)

References 36 publications

(11 reference statements)

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“…PDMS is widely used as a precursor for the silica layer, and the surface of PDMS can be converted to silicon oxide by various techniques such as low-temperature plasma oxidation, 18 UV/ozone treatment, [19][20][21] and pyrolytic degradation. 22,23 Recently, different three-dimensional structures of semiconductor, metal, and polymer have been fabricated using strain-driven self-rolling technique. [24][25][26][27][28][29][30] The strain in the film can arise by unequal thermal expansion of top and bottom layer, 31 different crystal lattice constants of top and bottom layer, [26][27][28][29] or unequal swelling of film in selective solvent.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Approach for the Fabrication of Silica and Silica/Metal Hybrid Microtubes

et al. 2009

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This paper describes a novel and simple method to fabricate silica and silica/metal hybrid microtubes of very high aspect ratio via self-rolling of polymer layers. A trilayer of poly(dimethylsiloxane) (PDMS)/polystyrene (PS)/poly(4-vinylpyridine) (P4 VP) self-rolled into microtubes, when exposed to a solvent selective for P4 VP chains, because of the strain generated by the swelling of P4 VP layer. Oxidative pyrolysis of the polymer tubes at 700 °C removes all the organic part of the tube and converts PDMS into silica. Moreover, by depositing a metallic layer on the tripolymer layer, it was possible to obtain silica/metal hybrid tubes. The metallic layer can form the inner or outer wall of the tube by depositing it over or under the PDMS layer. The fabricated tubes were further characterized by optical microscopy, Fourier transform infrared (FTIR), high-resolution scanning electron microscopy (HRSEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive analysis (EDX), 29Si solid-state nuclear magnetic resonance (29Si NMR), and focused ion beam (FIB). The silica and silica/metal hybrid tubes have potential applications in micro- and nanofluidic devices, optoelectronic devices, and in catalysis.

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Section: Introductionmentioning

confidence: 99%

“…Here, we used poly(dimethylsiloxane) (PDMS) as a precursor of silica. PDMS is widely used as a precursor for the silica layer, and the surface of PDMS can be converted to silicon oxide by various techniques such as low-temperature plasma oxidation, UV/ozone treatment, − and pyrolytic degradation. , …”

Section: Introductionmentioning

confidence: 99%