Method for improving photothermal performance and photothermal stability of gold nanorod
A gold nanorod and stability technology, which is applied in the field of improving the photothermal stability of gold nanorods, and can solve problems such as stability and poor photothermal performance
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Embodiment 1
[0061] Prepare a gold nanocluster (GNC) solution coated with bovine serum albumin (BSA):
[0062] 5 mL of 10 mM HAuCl 4 Mix well with 5mL of BSA with a concentration of 50mg / mL, and fully stir at 37°C. After 2min, quickly add 0.5mL of freshly prepared NaOH with a concentration of 1M, and continue to stir at 37°C. After 12h of reaction, the solution is orange-red. Put it in a dark box and irradiate it with 365nm light to see the red fluorescence, that is, the synthesis of GNC is completed.
Embodiment 2
[0064] Ascorbic acid (AA)-reduced gold nanorods (GNRs) solutions were prepared by seed growth method:
[0065] (1) Preparation of gold seeds: Add 5 mL of 0.5 mM chloroauric acid (HAuCl) to 5 mL of 0.1 M CTAB solution 4 ) aqueous solution, then mix well, and then add 14mL of ultrapure water; quickly add 0.5mL of 0.1M ice-cold sodium borohydride (NaBH 4 ) solution, the solution turned deep purple, continued to stir vigorously for 2 minutes, and then placed it in water at 28°C for 3 hours, and the NaBH that did not participate in the reaction 4 All were hydrolyzed to obtain a gold seed solution for subsequent use;
[0066] (2) Preparation of gold nanorod solution: 5mL of 1mM chloroauric acid (HAuCl 4 ) and 5mL of 0.2M cetyl ammonium bromide (CTAB) were thoroughly mixed, followed by adding 200uL of 4mM silver nitrate (AgNO 3 ) solution, 70uL of 100mM ascorbic acid (AA), stirred vigorously, the solution changed from yellow to colorless, and finally, added 120uL of the gold seed ...
Embodiment 3
[0068] Preparation of bovine serum albumin-coated gold nanorods (BSA-GNRs): Take 500uL of the gold nanorod solution prepared in Example 2 in a 1.5mL centrifuge tube, place it on a metal bath and control the temperature at 37°C, inject 20mg / mL of 250ul of BSA solution, mix well; add water to bring the total volume of the solution to 1mL, stand still for 30min, so that BSA and gold nanorods can fully react; centrifuge the solution at 2000rpm for 10min, twice; disperse the precipitate into 1mL of pure Store in water at 4°C, protected from light;
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