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[交流] CTAB和油酸钠合成高长径比金纳米棒

最近在用13年发表在nano letters 上的Using Binary Surfactant Mixtures To Simultaneously Improve the Dimensional Tunability and Monodispersity in the Seeded Growth of Gold Nanorods这篇文献做高长径比的金纳米棒，就是用CTAB和油酸钠做双表面活性剂，具体方法如下：种子合成方法和传统方法一致，To prepare the growth solution, 7.0 g (0.037 M in the final growth solution) or 9.0 g (0.047 M
in the final growth solution) of CTAB and a certain quantity of NaOL were dissolved in 250 mL
of warm water (~50 °C) in a 1L Erlenmeyer flask (Tables S2-S5). The solution was allowed to
cool down to 30 °C and 4 mM AgNO3 solution, as detailed in Tables S2-S5, was added. The
mixture was kept undisturbed at 30 °C for 15 min after which 250 mL of 1 mM HAuCl4 solution
3 was added. The solution became colorless after 90 min of stirring (700 rpm) and a certain
volume of HCl (37 wt. % in water, 12.1 M) was then introduced to adjust the pH (Tables S2-S5).
After another 15 min of slow stirring at 400 rpm, 1.25 mL of 0.064 M ascorbic acid (AA) was
added and the solution was vigorously stirred for 30 s. Finally, a small amount of seed solution
was injected into the growth solution (Tables S2-S5). The resultant mixture was stirred for 30 s
and left undisturbed at 30°C for 12 h for NR growth. The final products were isolated by
centrifugation at 7,000 rpm for 30 min followed by removal of the supernatant. No size and/or
shape-selective fractionation was performed.
合成出来的棒是红棕色，紫外图在下面，看紫外图小峰应该是没什么球杂质的，SEM图显示还是有挺多的球杂质，不知道有哪位大佬做过这个方法，望不吝赐教，多谢

金纳米棒紫外图。png

1.jpg

2.jpg

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31楼2018-09-29 16:27:26