Nano particles and application thereof
A nanoparticle and particle technology that is applied in the fields of analysis, measurement devices, and material analysis by optical means through chemical reactions of materials
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[0031] The embodiment of the present invention discloses a method for preparing nanoparticles, comprising:
[0032] Mixing Ag / Au bimetallic nanoparticles, buffer solution, positively charged polymer and glucose oxidase solution, and standing still to obtain nanoparticles.
[0033] The present invention selects hollow Ag / Au bimetallic nanoparticles (Ag / AuNSs) as a base material for immobilizing glucose oxidase (GOx), and successfully combines the enzyme-catalyzed reaction with the plasmonic processing of the Ag / Au bimetallic nanostructure.
[0034] The preparation process of the nanoparticles of the present application, that is, the enzyme hybrid Ag / Au-GOxNSs is as follows:
[0035] Disperse the Ag / Au bimetallic nanoparticles (Ag / AuNSs) in the buffer solution, and adjust the pH value of the solution to 6-7, then add a positively charged polymer, add glucose oxidase after standing, let stand, Ag / Au-GOxNSs were obtained.
[0036]In the above process, the positively charged poly...
Embodiment
[0052] 1. Synthesis of Ag / Au bimetallic nanoparticles
[0053] First, the template colloidal silver nanoparticles protected by sodium citrate were synthesized, showing grayish yellow, and its surface plasmon resonance absorption peak was located at ~430nm; then the prepared nano-silver sol (nanoparticle concentration was ~1.5×10 11 / mL, 10mL) as the seed solution, add an equal volume (10mL) of deionized water and heat to boiling, then add NH 2 OH·HCl (0.02M, 0.1 mL) with 0.1% HAuCl in different volumes 4 , and stir. After the solution was heated to reflux for several minutes, it was cooled to room temperature and stored at 4°C until use.
[0054] figure 2 In order to add different amounts of 0.1% HAuCl to the AgNPs solution system during the synthesis process 4 Typical LSPR absorption spectra of three different Ag / AuNSs samples (Sample1-75 μl, Sample2-150 μl and Sample3-300 μl) (total size 50-60 nm) synthesized in aqueous solution and the amount of H 2 o 2 TEM images be...
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