TY - JOUR
T1 - Layer-by-layer self-assembled tubular films containing polyoxometalate on electrospun nanofibers
AU - Ding, Bin
AU - Li, Chunrong
AU - Fujita, Shiro
AU - Shiratori, Seimei
N1 - Funding Information:
This work was partly supported by Keio Life-Conjugated Chemistry (LCC), Program of Center of Excellence (COE), Research Project in the 21st century sponsored by Japanese Ministry of Education, Science, Culture, and Sports.
PY - 2006/8/15
Y1 - 2006/8/15
N2 - Self-assembled polyoxometalate (H3PMo12O40) ultrathin tubular films were fabricated on electrospun cellulose acetate (CA) nanofibers via the electrostatic layer-by-layer (LBL) adsorption of oppositely charged polyethylenimine (PEI) and H3PMo12O40. The films coated fibers were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and wide-angle X-ray diffraction (WAXD). The morphology of LBL films coated CA nanofibers was studied by regulating the pH value and ionic strength of PEI solutions, the number of PEI/H3PMo12O40 bilayers, and the concentration of H3PMo12O40. The results indicated that the growth of LBL films fabricated at a PEI pH of 2.5 and a H3PMo12O40 pH of 2.5 (PEI2.5/H3PMo12O402.5) was much quicker than that of films of PEI and H3PMo12O40 adsorbed at pH 9 and 2.5 (PEI9/H3PMo12O402.5), respectively. Moreover, the concentration of H3PMo12O40, the number of coating bilayers, and the ionic strength of PEI solutions also showed strong influence to the growth of LBL films on nanofibers. Additionally, the high porous LBL films coated fibers were found after the deposition of PEI/H3PMo12O40 films from a high ionic strength of PEI solutions.
AB - Self-assembled polyoxometalate (H3PMo12O40) ultrathin tubular films were fabricated on electrospun cellulose acetate (CA) nanofibers via the electrostatic layer-by-layer (LBL) adsorption of oppositely charged polyethylenimine (PEI) and H3PMo12O40. The films coated fibers were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and wide-angle X-ray diffraction (WAXD). The morphology of LBL films coated CA nanofibers was studied by regulating the pH value and ionic strength of PEI solutions, the number of PEI/H3PMo12O40 bilayers, and the concentration of H3PMo12O40. The results indicated that the growth of LBL films fabricated at a PEI pH of 2.5 and a H3PMo12O40 pH of 2.5 (PEI2.5/H3PMo12O402.5) was much quicker than that of films of PEI and H3PMo12O40 adsorbed at pH 9 and 2.5 (PEI9/H3PMo12O402.5), respectively. Moreover, the concentration of H3PMo12O40, the number of coating bilayers, and the ionic strength of PEI solutions also showed strong influence to the growth of LBL films on nanofibers. Additionally, the high porous LBL films coated fibers were found after the deposition of PEI/H3PMo12O40 films from a high ionic strength of PEI solutions.
KW - Electrospun nanofibers
KW - HPMoO
KW - Layer-by-layer (LBL) self-assembly
KW - Morphology
KW - Polyoxometalate
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U2 - 10.1016/j.colsurfa.2005.10.085
DO - 10.1016/j.colsurfa.2005.10.085
M3 - Article
AN - SCOPUS:33744925943
SN - 0927-7757
VL - 284-285
SP - 257
EP - 262
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -