NDLI: Urchin-like polypyrrole nanoparticles for highly sensitive and selective chemiresistive sensor application

Content Provider	Royal Society of Chemistry (RSC)
Author	Lee, Jun Seop Jun, Jaemoon Shin, Dong Hoon Jang, Jyongsik
Copyright Year	2014
Abstract	Urchin-like polypyrrole (U_PPy) nanoparticles with various diameters were fabricated using a dual-nozzle electrospray and vapor deposition polymerization (VDP). Metal oxide nanoneedle-decorated PPy (FePPy) particles were fabricated as starting materials for deposition of a PPy layer on the metal oxide surface. The FePPy particles were prepared by heating and stirring an aqueous solution of the metal precursor and electrosprayed PPy (E_PPy) particles with nucleated sites on the surface. U_PPys with a maximized surface area were then formed by soaking in an initiator solution followed by VPD. The U_PPy particles were evaluated in various hazardous chemical gas sensors at room temperature. Because of their larger surface area, U_PPy based chemiresistive sensors exhibited greater sensitivity and ca. 10–100 times higher minimum detectable levels (MDLs) of common analytes than pristine PPy particle-based sensors. For example, the MDL of NH3 was approximately 0.01 ppm, which is better than that observed for other conducting polymer nanostructures. Our new fabrication methodology promises to be an effective approach for fabrication of hybrid nanostructures for future sensing technologies.
Starting Page	4188
Ending Page	4194
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	8
Journal	Nanoscale
DOI	10.1039/c3nr05864f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ammonia Electrospray ionization Polymerization Conductive polymer Polypyrrole
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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