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Microwave-induced fabrication of copper nanoparticle/carbon nanotubes hybrid material
Leelaviwat, N.,Monchayapisut, S.,Poonjarernsilp, C.,Faungnawakij, K.,Kim, K.S.,Charinpanitkul, T. Elsevier 2012 CURRENT APPLIED PHYSICS Vol.12 No.6
Copper nanoparticle/multi-walled carbon nanotube (MWCNT) hybrid material could be fabricated by microwave irradiation to a suspension of MWCNTs dispersed in copper precursor with the presence of ethylene glycol. Microscopic and spectroscopic analyses could confirm the uniform dispersion of copper oxide nanoparticles hybridized on the outer surface of MWCNTs. Reduction of Cu<SUP>2+</SUP> ions to Cu<SUB>2</SUB>O and Cu nanoparticles was ascribed to functional groups which were generated after the precursor was irradiated by microwave. Sufficient irradiation time of 5 min or longer played an important role to induce the agglomeration of copper oxide nanoparticles on the MWCNT surface.
T. Charinpanitkul,W. Suthabanditpong,H. Watanabe,T. Shirai,K. Faungnawakij,N. Viriya-empikul,M. Fuji 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.4
ZnO nanoparticles suspended in poly(acrylic acid) (PAA) were deposited onto layer-by-layer (LBL)polyelectrolyte (PET) films fabricated from poly(allylamine hydrochloride) (PAH) and PAA by dip coating method. Effect of etching time and concentration of ZnO suspension on hydrophilicity of the LBL-PET films before and after UV irradiation was examined using water contact angle measurement. 2.0 M PAH/PAA solutions with a dipping speed of 3.0 cm/min provided stable LBL-PET films with thickness sufficient for HCl etching. Glass substrates with the etched LBL-PET film dipped into 0.2 wt.% ZnO suspension exhibited the contact angle of 108 after irradiated by UV for 60 min.