Logic gate having adjustable logic function and based on CoOx
A technology of oxides and logic gates, applied in the fields of electrochemical variables of materials, chemical analysis using catalysis, etc.
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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 (10 mM) 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: Add 10 µL of 1 mg / ml cobalt oxide nanomaterial suspension onto the inverted electrode, and after it dries, add a certain amount of 0.05% nafion solution, dried for later use;
[0023] (3) Construction of the electrochemical three-electrode system: the electrode modified in step (2) was used as the working electrode to test by chronoamperometry or constant potential scanning or cyclic voltammetry, with Pt wire ...
Embodiment 2
[0025] Different concentrations of H 2 o 2 The cyclic voltammetry analysis of:
[0026] To the electrolyte solution (pH = 7) in Example 1, different concentrations of H were sequentially added 2 o 2 (0 mM, 1mM), the cyclic voltammetry test was carried out under the condition of a voltage of 0−1 V, and the obtained results are 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 (0 mM, 1 mM), the cyclic voltammetry test was carried out under the condition of a voltage of 0−1 V, and the obtained results are 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 consistent, indicating that the electrocatalytic activity of the ...
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 (3 mM) Tris-HCl buffer solution with pH = 7 was used as the electrolyte solution, and the chronoamperometry was performed at a voltage of -0.8V; after the current was stable, Hg was added to three identical three-electrode systems 2+ (final concentration 1 mM), Fe 3+ (final concentration 1 mM), Hg 2+ (final concentration 1 mM) and Fe 3+ (final concentration 1 mM), the test was ended after the current became stable. Experimental results such as image 3 (A) and (B), when only 1 mM Fe was added 3+ When the current response decreases, the output signal is 0; while only adding 1 mM Hg 2+ When the current response increases, the output signal is 1; at the same time, add 1 mM Hg 2+ and Fe 3+ When the current response decreases slightly, the output signal is 0. Thus, the INHIBIT lo...
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