Abstract:
Novel photochromic diarylethenes substituted with an isoxazole group and the method of preparation are disclosed. Also disclosed are compositions made with the photochromic diarylethenes. The preparation of thin films with the photochromic diarylethenes or compositions thereof are disclosed. The photochromic diarylethenes or compositions thereof may be used, for example in recording materials, photochromic windows, indicating elements, plastic mirrors, photochromic filters, photo switches, photosensitive drums, recording elements, solar cells, lens, fibers and optical elements.
Abstract:
A microorganism detecting sensor is provided to estimate existence and concentration of E. coli in a sample simply without requiring any complicated laboratory facilities or equipments or any necessary conditions for culturing. A sensor for detecting microorganism comprises: a carbon nano-tube transistor array including a channel region consisting of a metal source electrode(12), a metal drain electrode(14), a gate(16) and a carbon nano-tube(18); an aptamer(20) which is absorption-modified into the carbon nano-tube, thereby being specifically bonded to microorganism(24); and a fixation material which fixates the aptamer on the carbon nanotube. A method for detecting microorganism comprises the steps of: (a) preparing a plurality of diluted solutions of the microorganisms having different diluted concentrations; (b) precipitating the aptamer of the microorganism detecting sensor having the carbon nanotube transistor in the microorganism diluted solutions; (c) measuring electroconductivity of the carbon nanotube transistor; and (d) after providing 0(on) or 1(off) in accordance with change of the electroconductivity value, estimating the microorganism concentration through an MPN table. Further, the channel region consisting of the carbon nano-tube consists of single wall nano-tube or multi wall nano-tube.
Abstract:
PURPOSE: Provided is a novel photochromic diarylethene substituted with isoxazol group. Therefore, the photochromic diarylethene is excellent in dispersion with fluoro diacrylate monomer capable of being photopolymerized and a thin film manufactured therefrom has excellent photochromic property when irradiating UV and mechanical strength. CONSTITUTION: The novel photochromic diarylethene substituted with isoxazol group is represented by the formula(1) and manufactured by the steps of: formylating diarylethene compound of the formula(2); adding NH2OH·HCl and basic solution sequentially then adding N-chlorosuccin imide(NSC); and adding R2 substituted acetylene compound and basic catalyst.