33results about How to "Excellent electrochemical response" patented technology

The divisional application discloses a flexible glucose electrochemical sensor, belonging to the technical field of electrochemical sensors. A flexible electrode substrate is polydimethylsiloxane (PDMS), and a dendritic structure nano-silver conducting layer is arranged on the PDMS substrate. The preparation method comprises the steps of carrying out self-assembly of indium tin oxide (ITO) glass,carrying out electrochemical deposition of a dendritic structure nano-silver film layer on the ITO glass, putting the ITO glass with the nano-silver conducting layer into a PDMS solution for curing, and then removing the PDMS film from the ITO glass to obtain the flexible glucose electrochemical sensor based on a dendritic nano-silver structure. The flexible glucose electrochemical sensor providedby the invention has a good response to glucose, is simple in preparation method and is easy to mass production, thus being expected to be widely applied to industrial and agricultural production aswell as life science research, especially wearable medical equipment field.

The invention relates to a preparation method of an optical composite nano-fiber material. The method comprises the steps of 1) preparing a nano gold-multi-wall carbon nano tube compound Au-MCNT; 2) preparing a spinning solution; 3) preparing the optical composite nano-fiber material in an electrostatic spinning way. In the electrostatic spinning, the prepared uniform and transparent precursor electrostatic spinning solution is arranged in an injector, a positive electrode of a high-voltage electrostatic generator is connected with a needle, a negative electrode is connected onto a clean bare electrode, the liquid is supplied by adopting a trace injection pump and directly applied to the injector needle through the high-voltage electrostatic power generated by the high-voltage electrostatic generator, and the optical composite nano-fiber is collected onto the bare electrode. The nano gold-multi-wall carbon nano tube compound with good conductivity and large specific surface area and capable of stably and firmly loading a great amount of trisruthenium Ru(bpy)3<2+> is doped with the spinnable macromolecular nylon 6 with good stability to obtain the precursor electrostatic spinning solution, and the optical composite nano fiber is obtained through the one-step electrostatic spinning method.

The invention belongs to the technical field of electrochemical and nanometer materials, and relates to a DNA sensing electrode preparation method, wherein a DNA sensing electrode based on anionic porphyrin-carbon nano-tube modification is prepared by using the pi-pi interaction between anionic porphyrin and carbon nano-tubes. The modification steps comprise: ultrasonically dispersing carbon nano-tubes (CNTs) in a Tris-HCl buffer liquid, adding ssDNA and complementary paired ssDNA thereof (are hybridized to form dsDNA), adding an anionic porphyrin (TSPP) solution, and carrying out drop coatingto obtain the TSPP / dsDNA / CNTs / GCE modified electrode. According to the present invention, the preparation method has characteristics of simple process and short preparation time; the prepared electrode is the good detection electrode; and the prepared DNA biological sensing electrode combines the specificity of DNA complementary pairing and the high sensitivity of electrochemical detection, and is expected to provide the new way for the early diagnosis of cancer cells.

The invention discloses a preparation method and application of a graphene-amphiphilic column[5]arene-gold nanoparticle ternary nanocomposite. The preparation method of the nanocomposite comprises preparation of a graphene-column[5]arene nanocomposite and preparation of graphene-column[5]arene-gold nanoparticles. The synthetic method provided by the invention is simple and quick; experiments prove that an electrode modified by the graphene-column[5]arene-gold nanoparticle ternary nanocomposite is capable of synergistically promoting the electrochemical reaction of dopamine, and has a wide linear range to electrochemical detection of dopamine, namely 1.2*10<-8>-2.5*10<-5> mol.L<-1>, and also an extremely limit of detection, namely 9*10<-9> mol.L<-1>.