A synthetic method of chiral nanomaterials using DNA-induced and chiral light-assisted growth
A technology of nanomaterials and synthesis methods, applied in the field of synthesis of chiral nanomaterials, which can solve problems such as hindering the application potential of chiral nanomaterials, cumbersome synthesis process, and low chiral strength of products
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Embodiment 1
[0021] Example 1 Preparation of DNA-bound gold nanotriangles
[0022] (1) Add 8 mL of ultrapure water and 1.5-2 mL of 100 mmol / L CTAC to the reaction flask, and mix well;
[0023] (2) Add 50-75μL 10mmol / L KI solution, 80μL 25.4mmol / L HAuCl 4 solution and 20μL 1mol / L NaOH solution, mix well; add 80-100μL 64mmol / L ascorbic acid solution to reduce Au 3+ ; Quickly add 8-10μL of 0.33mol / L NaOH solution, mix well for 2~3s, and let stand for 10min at room temperature;
[0024] (3) After the reaction was completed, centrifuge at 3.4 x g for 10 min; discard the supernatant, resuspend the pellet in 0.5 mmol / L CTAB, and repeat the same centrifugation operation three times to obtain gold nanotriangles;
[0025] (4) Add 60 μL of gold nano-triangles and 8 μL of 100 nmol / L single-stranded DNA sequence with sulfhydryl groups into a 1.5 mL centrifuge tube, mix well, and incubate at 37°C for 2 h. After the reaction, centrifuge at 1.7 x g for 1-2 min, discard the supernatant, and resuspend t...
Embodiment 2
[0026] Example 2 Preparation of DNA-induced and chiral light-assisted synthesis of chiral nanomaterials
[0027] (1) Add 1mL ultrapure water, 20μL 0.1mol / L CTAB and 20μL 0.02mol / L HAuCl to a 1.5mL centrifuge tube 4 , mix well, and let stand for 10min; add 20μL of 0.05mol / L ascorbic acid, mix well, the solution becomes colorless and then add 30μL of DNA-bound gold nanotriangles;
[0028] (2) The solution was quickly mixed and immediately placed at a wavelength of 594nm, irradiated under different polarization conditions, and the optical power was 20-120mW / cm 2 , the illumination time is 1h; after the reaction is over, centrifuge at 1.7xg for 1-2min, discard the supernatant, and resuspend the pellet in 0.5mmol / L CTAB; the same centrifugation operation is repeated three times to obtain DNA-induced and chiral light-assisted Growing chiral nanomaterials.
[0029] The single-stranded DNA sequence with sulfhydryl group is specifically: SEQ ID No.2: C 5 :-SH-CCCCC; SEQ ID No.3: C ...
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