Silver nanorod synthesis and surface enhanced Raman spectrum base prepared based on silver nanorod
A surface-enhanced Raman, silver nanorod technology, applied in nanotechnology, nanotechnology, Raman scattering, etc., can solve the problems of overnight duty, restricting in-depth research and exploration of silver nanorods, harsh reaction conditions, etc.
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Embodiment 1
[0030] Preparation of quintuplet twinned gold nanoseeds:
[0031] (1) 75μl, 20mM chloroauric acid solution, 10μl, 100mM silver nitrate solution, 140μl ultrapure water were added to 3ml of PVP dimethylformamide (DMF) solution, and the PVP concentration was 200mg / ml. The above system was heated at 120°C The reaction was heated in an oil bath for 1 hour.
[0032] (2) 500 μl and 375 μl of 20 mM chloroauric acid solution and 600 μl ultrapure water were added to the DMF solution of PVP (100 mg / ml) for the above-mentioned synthesized product, and heated and reacted in an oil bath at 120° C. for 1 hour.
[0033] (3) Add 1 ml of the above seeds, 90 μl of 20 mM chloroauric acid solution and 720 μl of water into 3 ml of 80 mg / ml PVPDMF solution, and react at 120° C. for 30 minutes. After the reaction system was cooled, it was centrifuged twice at 10,000 rpm, and the obtained five-twinned gold nanoseeds were stored in 1 ml of ultrapure water.
[0034] Silver Nanorod Growth:
[0035] Ad...
Embodiment 2
[0044] Preparation of quintuplet twinned gold nanoseeds:
[0045] (1) 75μl, 20mM chloroauric acid solution, 15μl, 100mM silver nitrate solution, 140μl ultrapure water were added to 3ml of PVP dimethylformamide (DMF) solution, the PVP concentration was 200mg / ml, and the above system was heated at 120°C The reaction was heated in an oil bath for 1 hour.
[0046] (2) Take 500μl and 375μl of the above-mentioned synthesized product, 20mM chloroauric acid solution, 600μl ultrapure water and add them together to the DMF solution of PVP (100mg / ml), heat and react in an oil bath at 120°C for 1 hour.
[0047] (3) Add 1 ml of the above seeds, 90 μl of 20 mM chloroauric acid solution and 720 μl of water into 3 ml of 80 mg / ml PVPDMF solution, and react at 120° C. for 30 minutes. After the reaction system was cooled, it was centrifuged twice at 10,000 rpm, and the obtained five-twinned gold nanoseeds were stored in 1 ml of ultrapure water.
[0048] Growth of silver nanorods:
[0049] Add...
Embodiment 3
[0057] Preparation of quintuplet twinned gold nanoseeds:
[0058] (1) 75μl, 20mM chloroauric acid solution, 7.5μl, 100mM silver nitrate solution, 140μl ultrapure water were added to 3ml of PVP dimethylacetamide (DMAC) solution, the PVP concentration was 200mg / ml. The above system was heated at 120°C heated in an oil bath for 1 hour.
[0059] (2) 500 μl and 375 μl of 20 mM chloroauric acid solution and 600 μl ultrapure water were added to the DMAC solution of PVP (100 mg / ml) for the above-mentioned synthesized product, and heated in an oil bath at 120° C. for 1 hour.
[0060] (3) Add 1 ml of the above seeds, 90 μl of 20 mM chloroauric acid solution and 720 μl of water into 3 ml of 80 mg / ml PVPDMAC solution, and react at 120° C. for 30 minutes. After the reaction system was cooled, it was centrifuged twice at 10,000 rpm, and the obtained five-twinned gold nanoseeds were stored in 1 ml of ultrapure water. Silver Nanorod Growth:
[0061] Add 0.2ml of the five-twinned gold nano-...
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