A kind of sugar-sensitive smart hydrogel based on gold surface and its synthesis method
A synthesis method and hydrogel technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high cost, invasion of the human body, complicated steps, etc., and achieve high selectivity, improved specificity, and low exchange resistance. Effect
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Embodiment 1
[0023] Example 1: (1) Surface pretreatment of gold flakes: place the gold metal flakes in the prepared Piranha reagent (Piranha), ultrasonically clean them for 15 minutes, then ultrasonically clean them with acetone, ethanol, and twice distilled water for 10 minutes, and dry them with N2; Among them, the configuration of Peel's reagent is concentrated H2SO4: H2O2=5:3 (V:V); (2) Amination: Dissolve 3-aminopropyltrimethoxysilane in toluene, and place the treated gold sheet in In the above solution, under N2 atmosphere, after reacting at 110°C for 12 hours, rinse the gold sheet with absolute ethanol and double distilled water successively, and blow dry with N2; the concentration of silane coupling agent is 3mmol / L; (3) double Bonding: Dissolve a certain amount of maleic anhydride in dimethyl sulfoxide, place the gold flakes described in step (2) in the above solution, react at 25°C for 10 hours, then wash with absolute ethanol Rinse the gold flakes with double distilled water, bl...
Embodiment 2
[0026] Example 2: (1) Surface pretreatment of gold wafers: place gold-plated silicon wafers in prepared Piranha reagent, ultrasonically clean for 30 minutes, then ultrasonically clean with acetone, ethanol, and double distilled water for 10 minutes, and blow dry with N2; Among them, the configuration of Peel's reagent is concentrated H2SO4: H2O2=7:3 (V:V); (2) Amination: Dissolve a certain amount of 3-aminopropyl triethoxysilane in ethanol, and the treated Place the gold flakes in the above solution under N2 atmosphere. After reacting at 78°C for 5 hours, rinse the gold flakes with absolute ethanol and double distilled water in sequence, and dry them with N2. The concentration of the silane coupling agent is 5 mmol / L; (3) Double bond: Dissolve a certain amount of succinic anhydride in N,N'-dimethylformamide, place the gold flakes described in step (2) in the above solution, and react at 25°C for 12h Finally, rinse the gold sheet with absolute ethanol and double distilled water...
Embodiment 3
[0027] Example 3: (1) Surface pretreatment of gold flakes: place the gold-plated silicon flakes in prepared Piranha reagent, ultrasonicate for 60 minutes, then ultrasonically clean with acetone, ethanol, and twice-distilled water for 10 minutes, and blow dry with N2; Among them, the configuration of Peel's reagent is concentrated H2SO4:H2O2=4:3 (V:V); (2) Amination: Dissolve a certain amount of γ-aminopropylmethyldiethoxysilane in a volume ratio of 1: 1 of ethanol and distilled water, place the treated gold flakes in the above solution, N2 atmosphere, after reacting at 50°C for 12h, rinse the gold flakes with absolute ethanol and double distilled water successively, and dry them with N2; wherein, Concentration of γ-aminopropylmethyldiethoxysilane = 4mmol / L; (3) Double bond: Dissolve a certain amount of phthalic anhydride in dichloromethane, and dissolve the Place the gold flakes in the above solution, react at 35°C for 12 hours, rinse the gold flakes with absolute ethanol and ...
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