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Cobalt oxide-based logic gates with tunable logic functions

A logic function and logic gate technology, applied in the new application field of transformable logic gates

Active Publication Date: 2020-10-09
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cobalt tetroxide also has imitation catalase activity, yet take BSA as the template synthesis of cobalt tetroxide used in electrochemistry has not been reported, based on the logic gate of tricobalt tetroxide and the research on the function of logic gate with pH adjustment has not been reported

Method used

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  • Cobalt oxide-based logic gates with tunable logic functions
  • Cobalt oxide-based logic gates with tunable logic functions
  • Cobalt oxide-based logic gates with tunable logic functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Construction of switchable logic gate electrochemical system of cobalt oxide nanospheres based on bovine serum albumin template:

[0021] (1) Preparation of cobalt oxide nanomaterial signal probes: mix bovine serum albumin (0.2 mg / ml) with an aqueous solution containing divalent cobalt ions (5 mM), incubate for 1 hour, add etc. volume of sodium borohydride (10mM) and mix well, shake the reaction for several hours and centrifuge to collect the product, and store it at 4°C for later use;

[0022] (2) Construction of electrodes based on cobalt oxide nanomaterials: 10 μL of 1 mg / ml cobalt oxide nanomaterial suspensions were added dropwise to the inverted electrode, and after drying, a certain amount of 0.05% Nafion solution, dry for later use;

[0023] (3) Construction of an electrochemical three-electrode system: use the electrode modified in step (2) as the working electrode to test by chronoamperometry or constant potential scanning or cyclic voltammetry, use Pt wire as...

Embodiment 2

[0025] Different concentrations of H 2 o 2 The cyclic voltammetry analysis of:

[0026] In the electrolyte solution (pH=7) among the embodiment 1, add the H of different concentration successively 2 o 2 (0mM, 1mM), the cyclic voltammetry test was carried out under the condition of a voltage of 0-1V, and the obtained results were as follows figure 1 As shown, with H 2 o 2 As the concentration increases, the current will gradually increase.

[0027]Another set of experiments was done, adding different concentrations of H in sequence to the electrolyte solution (pH=10) in Example 1 2 o 2 (0mM, 1mM), the cyclic voltammetry test was carried out under the condition of a voltage of 0-1V, and the obtained results were as follows figure 2 As shown, with H 2 o 2 As the concentration increases, the current will gradually increase.

[0028] In summary, the cyclic voltammetry curves at the two pHs are basically the same, indicating that the electrocatalytic activity of the prep...

Embodiment 3

[0030] Construction of OR and INHIBIT variable logic gates:

[0031] To construct the INHIBIT logic gate, the specific method is: use the above-mentioned three-electrode system to contain H 2 o 2 (3mM) Tris-HCl buffer solution of pH=7 was used as electrolyte solution, and chronoamperometry was carried out at a voltage of -0.8V; after the current was stable, Hg was added to three identical three-electrode systems. 2+ (final concentration 1mM), Fe 3+ (final concentration 1mM), Hg 2+ (final concentration 1mM) and Fe 3+ (final concentration 1mM) mixed solution, the test is ended after the current is stable. Experimental results such as image 3 As shown in A and B, when only 1mM Fe 3+ When the current response decreases, the output signal is 0; and only 1mM Hg is added 2+ When the current response increases, the output signal is 1; at the same time, add 1mM Hg 2+ and Fe 3+ When the current response decreases slightly, the output signal is 0. Thus, the INHIBIT logic gate ...

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Abstract

The invention relates to the technical fields of nanomaterials, catalysis, analytical chemistry and molecular computer, and in particular, relates to a new variable logic gate application of CoOx nanospheres based on a bovine serum protein template. The prepared CoOx nanospheres not only maintain a stable activity of electrocatalytic reduction of H2O2 in a wide pH range, but also have different influence on the activity under different pH by different metal ions. With use of the characteristic, and with metal ions as input signals, the electrochemical method is applied, the electrochemical response of the CoOx nanosphere activity of electrocatalytic reduction of H2O2 is used as an electrochemical signal, an electrochemical logic gate is constructed and the function of the logic gate is changed by adjusting pH.

Description

technical field [0001] The invention relates to the technical fields of nanometer material, catalysis, analytical chemistry and molecular computer, specifically including the new application of switchable logic gate of cobalt oxide nanosphere based on bovine serum albumin template. Background technique [0002] Recently, inorganic nanomaterials have attracted more and more attention because of their good enzyme-mimicking properties. Compared with natural enzymes, inorganic nanomaterials are more stable under acid-base conditions. So far, most of the reported inorganic nanomaterials are mainly artificial enzyme peroxidase mimics, and they have been successfully applied to various analytical problems. Among them, electrochemistry is an important application field of inorganic nanomaterials to simulate enzyme performance. Bibhutosh Adhikary et al. in "Synthesis of FeSand FeSe nanoparticles from a single source precursor: a study of their photocatalytic activity, peroxidase-lik...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/10G01N27/26G01N27/30
CPCG01N27/26G01N27/30G01N31/10
Inventor 韩磊张海姣
Owner QINGDAO AGRI UNIV
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