Metal sulfide coated multiwalled carbon nanotubes synthesized by an in situ method and their optical limiting properties.
A metal sulfide such as ZnS, CdS, Ag(2)S or PbS was coated on the sidewall of multiwalled carbon nanotubes (MWCNTs) by an in situ wet chemical synthesis approach via noncovalent functionalization of MWCNTs with a polyelectrolyte (polyethylenimine or poly(diallyldimethylammonium chloride)) without causing significant electronic and structural modification of the carbon nanotubes. Extensive characterizations of the fabricated nanocomposites have been performed using x-ray diffraction, transmission electron microscopy (TEM), high resolution TEM, energy dispersive x-ray spectroscopy, selected area electron diffraction, thermal gravimetric analysis, Fourier transform IR spectra, UV-vis spectra and x-ray photoelectron spectroscopy. The coating layers were composed of metal sulfide nanoparticles with a mean size of less than 10 nm. The optical limiting property measurements for some metal sulfide coated MWCNTs were carried out by the open-aperture z-scan technique. The results demonstrate that the samples suspended in water showed optical limiting behavior better than that of purified MWCNTs.
Wu
Hui-Xia
HX
Department of Chemistry, Shanghai Normal University, Shanghai, People's Republic of China.
Cao
Wei-Man
WM
Chen
Qiang
Q
Liu
Miao-Miao
MM
Qian
Shi-Xiong
SX
Jia
Neng-Qin
NQ
Yang
Hong
H
Yang
Shi-Ping
SP
D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012031:Refractometry; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties
D046911:Macromolecular Substances; D008670:Metals; D037742:Nanotubes, Carbon; D013440:Sulfides