TY - JOUR
T1 - Novel synthesis and characterization of yellow inorganic/organic composite spheres for electrophoretic display
AU - Duan, Jihai
AU - Feng, Yaqing
AU - Yang, Guang
AU - Xu, Wenliang
AU - Li, Xianggao
AU - Liu, Ying
AU - Zhao, Jing
PY - 2009/2/4
Y1 - 2009/2/4
N2 - Yellow CdS/wax nanocomposite spheres were fabricated in an aqueous solution by an emulsion method, in which the CdS nanoparticles were adsorbed on the surface of a wax core with positive charge by electrostatic self-assembly. A thin shell of SiO2 was then coated to the yellow CdS/wax spheres by the hydrolysis of Na2SiO3 in the same aqueous solution to enhance the optical and mechanical properties and the charge load of the composite spheres. The product was characterized by transmission electron microscopy, scanning electron microscope, atomic force microscopy, thermogravimetric analysis, and X-ray powder diffraction, which showed that the SiO2 walls of spheres were compact and part of CdS crystals dispersed inside, the density of composite spheres being about 1.3 g/cm3, which match most of the suspensions. Fourier transform infrared spectroscopy, and energy dispersive X-ray spectrometry showed the component of composite spheres. Dynamic light scattering showed the diameter distribution of composite spheres was between 100-400 nm. Zeta-potential measurement proved that the SiO2/CdS/wax spheres had a higher charge load, and Ultraviolet-visible spectra showed that the SiO2/CdS/wax spheres had a better optical property. Therefore, this type of composite spheres had the merits of low density and strong durability in environments. The response behavior of the microencapsulated electronic ink of the composite spheres has been measured. This novel method is expected to produce various inorganic/organic nanocomposite spheres with potential application in the fields of electronic paper and other material science.
AB - Yellow CdS/wax nanocomposite spheres were fabricated in an aqueous solution by an emulsion method, in which the CdS nanoparticles were adsorbed on the surface of a wax core with positive charge by electrostatic self-assembly. A thin shell of SiO2 was then coated to the yellow CdS/wax spheres by the hydrolysis of Na2SiO3 in the same aqueous solution to enhance the optical and mechanical properties and the charge load of the composite spheres. The product was characterized by transmission electron microscopy, scanning electron microscope, atomic force microscopy, thermogravimetric analysis, and X-ray powder diffraction, which showed that the SiO2 walls of spheres were compact and part of CdS crystals dispersed inside, the density of composite spheres being about 1.3 g/cm3, which match most of the suspensions. Fourier transform infrared spectroscopy, and energy dispersive X-ray spectrometry showed the component of composite spheres. Dynamic light scattering showed the diameter distribution of composite spheres was between 100-400 nm. Zeta-potential measurement proved that the SiO2/CdS/wax spheres had a higher charge load, and Ultraviolet-visible spectra showed that the SiO2/CdS/wax spheres had a better optical property. Therefore, this type of composite spheres had the merits of low density and strong durability in environments. The response behavior of the microencapsulated electronic ink of the composite spheres has been measured. This novel method is expected to produce various inorganic/organic nanocomposite spheres with potential application in the fields of electronic paper and other material science.
UR - http://www.scopus.com/inward/record.url?scp=61549095462&partnerID=8YFLogxK
U2 - 10.1021/ie800416w
DO - 10.1021/ie800416w
M3 - 文章
AN - SCOPUS:61549095462
SN - 0888-5885
VL - 48
SP - 1468
EP - 1475
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 3
ER -