Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Reexamination Certificate
2006-09-14
2010-06-08
Hendrickson, Stuart (Department: 1793)
Chemistry of inorganic compounds
Silicon or compound thereof
Binary compound
C427S492000, C427S493000, C427S503000, C427S903000, C977S892000
Reexamination Certificate
active
07731927
ABSTRACT:
A method by which ceramic nanowires with diameters ranging from several to several tens of nanometers can be synthesized with improvements in the shape retention of the nanowires and the yield of conversion to ceramic, which method comprises the steps of forming a thin film of a silicon-containing polymer usable as a ceramic precursor, irradiating the thin film with ion beams to form cylindrical crosslinked portions, extracting the un-crosslinked portions with a solvent to produce nanowires of the silicon-containing polymer, irradiating the nanowires with an ionizing radiation so that they are crosslinked again, and firing the re-crosslinked nanowires.
REFERENCES:
Meng, et al., β-SiC Nanorods With Uniform Amorphous SiO2 Wrappers On The Outside Surface, Materials Research Bulletin 1999; 34(5): 783-790.
Gundiah, et al., Synthesis and characterization of silicon carbide, silicon oxynitride and silicon nitride nanowires, Journal of Materials Chemistry 2002; 12: 1606-1611.
Seki, et al., 3-D Structure Control of Nanowires Formed by Single Ion Hitting to Si-Based Polymers, Nippon Genshiryoku Kenkyujo Jaeri, Review pp. 147-149 (2003).
Shu Seki, et al., “Formation of Nanowires along Ion Trajectories in Si Backbone Polymers”, Advanced Materials, Nov. 16, 2001, pp. 1663-1665, vol. 13, No. 22.
G.W. Meng, et al., “62 -SiC Nanorods with Uniform Amorphous SiO2Wrappers on the Outside Surface”, Materials Research Bulletin, 1999, pp. 783-790, vol. 34, No. 5.
T. Taguchi, et al., “Synthesis of Silicon Carbide Nanotubes”, J. Am. Ceram. Soc., 2005, pp. 459-461, vol. 88, No. 2.
Seki Shuhei
Sugimoto Masaki
Tagawa Seiichi
Tsukuda Satoshi
Yoshikawa Masahito
Hendrickson Stuart
Japan Atomic Energy Research Institute
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