Fabrication Of Ordered Materials And Research Of Electrochemical And Fluorescence Properties

Ordered materials is an important material in electronics, information technology, biotechnology and other new technological developments, such as high-definition, high-resolution displays, semiconductor lasers, high storage elements, miniature circuit boards, bio-chips. Therefore, ordered nanostructured thin films for future information technology, biotechnology and the development of electronic technology have revolutionized the decisive role. Protonic acid doped polyaniline has electrical conductivity, redox, and many excellent features, such as proton exchange is a great prospect of conductive polymer materials. So its layers of self-assembled nanomaterials in electrochemical catalysis, bio-sensors, gas sensors, battery materials development, etc, have important research value and significance. Build a new light, electro-catalytic honeycomb thin film material, help to expand the scope of application of the porous film has important academic significance. Honeycomb thin films not only have unique structural features, also in many areas have potential applications, such as photonic crystals, SERS substrate, super-hydrophobic layer protein patterning, cell culture, fuel-sensitized solar cells, etc., which attracted widespread attention of researchers. The surfactant has a unique amphiphilic structure, and can interact with a variety of substances. By modification of the surface active agent, the surface properties can be controlled to obtain composite materials, and a rich interface aggregate structure can be gained with the synergistic effect of the surfactant in the solution. Using the modification or auxiliary effects of surfactant, a variety of functional materials (such as polyoxometalate molecules, nano metal particles, DNA molecules and the like) is assembled to obtain the functional honeycomb film material, which expands the applications of porous film. As an important class of functional substances, porphyrin and metalloporphyrin have good properties not only catalytic, optical, electrical and biological activity, but also certain chemical and thermal stability. So, porphyrin-based supramolecular self-assembly in chemistry, life science, materials science, medicine and environmental science and other fields have important research value.(1) In this paper, the polyaniline/MnT1239 porphyrin/platinum nanoparticle composite was prepared by cyclic voltammetry electrochemical polymerization of polyaniline/MnT1239 porphyrin composite materials and reduction potentiostatic deposition of platinum nanoparticles. Significant changes in appearance occur in polyaniline/MnT1239 porphyrin material after electrodeposition of platinum, with the average diameter of the rod-like structures from 90 nm to 200 nm and a large specific surface area. Average size of platinum nanoparticles was 20 nm, with homogeneous distribution and great electrical conductivity.(2) In this paper, polyaniline (PANi/PMo12) and polyaniline/multi-walled carbon nano tubes (PANi/PMo12/MWCNTs) have been doped with Keggin-type heteropolyanions by electrochemical polymerization, affording composites with exceptional electrochemical properties. The more even distribution of heteropolyanions in the hybrid structure is obtained due to the addition of multi-walled carbon nanotubes. The PANi/PMo12/MWCNTs composite has showed electrochemical activity superior to the PANi/PMo12 composite material. Further electrocatalytic studies indicated that the PANi/PMo12/MWCNTs composite can reduce IO3- anions in an electrocatalytic manner.(3) In this paper, a novel honeycomb-patterned fluorescent film was fabricated by self-assembly of polystyrene (PS)/poly ethylene glycol (PEG)/meso-tetra (N-methy-4-pyridyl) porphinetetratosylate (TMPyP) blend system, at the assistance of diisooctyl sodium sulfosuccinate (AOT). Ordered microporous PS/PEG/TMPyP/AOT blend films were prepared by the breath figure method. The condensed water droplets acted as the sacrificial templates, which were stabilized by strong hygroscopic PEG and amphiphilic surfactant AOT. Relative humidity and evaporation conditions considered as critical factors were investigated to control the morphologies of the films. The introduction of surfactant AOT greatly promoted the dissolution of the TMPyP in PS/PEG polymer solution according to the UV-vis spectra data, which led to the fluorescence enhancement of ordered porous blend films. The unique "internal ring" structures were formed during phase separation and confirmed by scanning electron microscopy images and fluorescence micrographs.(4) In this paper, by means of the solubilizing effect of the porphyrin and the maintenance of stability of droplets diisooctyl sulfosuccinate (diisooctyl sodium sulfosuccinate, AOT), prepared using polystyrene (polystyrene, PS)/polyethylene glycol{poly (ethylene glycol),PEG}/nucleic acid aptamers (aptamer, S-Apt) mixed system of self-assembled honeycomb pattern of fluorescent film. The film porous structure tightly packed, orderly, aperture at around 10 μm. Incubation of fluorescent probe chain and washing process can be washed off the film surface attached AOT and impurities, while not destroying the structure of the film. We discussed as part of film-forming material in the film during the manufacturing process and the role of incubation AOT. In the mixed system,3’ end portion of S-Apt can interact with negative AOT surfactant molecules. As a functional material, S-Apt is assmbled into honeycomb films, and not embedded portions of S-Apt remains biologically active. Fluorescent probes can be combined with the matching chain in the inner annular portion of the film, which exhibits a fluorescence phenomenon.