Fabrication And Characterization Of Copper Phthalocyanine Oligomers Nanoparticles

The copper phthalocyanine oligomer (O-CuPc) was a new class of organic semiconductor material and exhibited extraordinary high dielectric property. Currently, high dielectric permittivity O-CuPc as soft organic fillers have been dispersed into the ferroelectric polymer matrix to prepare the two or three components entirely organic composite with good mechanical and dielectric response. Although the dielectric property of the composites was found to depend on the dimensions of the O-CuPc grains because the exchange coupling of the nano-scaled filler and matrix can enhance the electromechanical and dielectric responses of composites, the fabrication of O-CuPc nanoparticles is at present little reported.In this work, preparation and characterization of O-CuPc bulk and nano-particles were studied. Firstly, the O-CuPc bulk-particles were successfully synthesized by the solution method with a minor modification. The experimental data indicated that the O-CuPc obtained possessed the theoretical sheet molecular structure.Subsequently, extensive studies had focused on the fabrication of O-CuPc nanoparticles. Firstly, Liquid Phase Direct Precipitation (LPDP) method was employed to fabricate the O-CuPc nanoparticles. The influential factors of the diameters of O-CuPc nanoparticles during the fabrication procedure were also studied. The type of the surfactants played an important role in controlling the size and shape of O-CuPc nanoparticles, nonionic surfactants were found to allow the growth of O-CuPc nanoparticles with a smaller size without aggregation. In addition, O-CuPc nanoparticles were also fabricated via a new method of acid-alkali titration in the presence of nonionic surfactants. The results showed that this method, which will bear potential application because of the simple process, short periods and low cost, is much more adapted to the fabrication of O-CuPc nanoparticles with peripheral carboxyl groups. Meanwhile, the optimal conditions for fabrication of O-CuPc nanoparticles through the above-mentioned two methods were also referred in this paper.Moreover, XRD patterns, FT-IR and UV-visible spectra were employed to characterize O-CuPc nanoparticles. We found that the O-CuPc nano-colloidal solution with good stability and optical property was expected to be used in photoelectrical materials and electron industry. The micelle models of different kinds of surfactants were also showed in the end, which provided a powerful tool to explain the advantage of nonionic surfactants.