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liyanhua123

木虫 (小有名气)

[求助] 如何除去巯基十一酸?

我是做金银纳米颗粒的,请问各位高人在纳米金表面修饰巯基十一酸以后应该如何将多余的巯基十一酸除去????
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加油,为自己。。。
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liyanhua123

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引用回帖:
4楼: Originally posted by sally208 at 2011-08-17 14:20:28:
Then centrifuge at the low rpm for a longer time ...   

what is the size of your gold nanoparticles? -Unless they are extrememly small (less than 10 nm), centrifugation always works.

If the c ...

我的金是2-3纳米,很小。之前没用过透析装置,能否指教一二,谢谢。
加油,为自己。。。
5楼2011-08-19 17:45:54
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sally208

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【答案】应助回帖


yingli09(金币+1): 谢谢应助! 2011-08-15 15:30:15
yingli09: 再次谢谢专家的支持! 2011-08-15 15:30:36
liyanhua123(金币+2): 谢谢啊,我也离心了,但是巯基十一酸可以形成白色的絮状物质,跟着金离心下来呀,怎么办呢 2011-08-16 10:13:14
Centrifugation is the common way to purify Au/Ag nanoparticles.
2楼2011-08-15 15:16:37
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sally208

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金光闪闪2010(金币+1): should have a try 2011-08-16 14:34:19
liyanhua123(金币+3): 我用的10000rpm,巯基十一酸都变成絮状沉淀,离下来了。若转速低,金不能完全离下来呀。 2011-08-17 09:11:45
How about using a lower rpm? Au nanoparticles are much heavier than 巯基十一酸...
3楼2011-08-16 14:22:04
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sally208

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金光闪闪2010(金币+1): 2011-08-17 21:42:09
Then centrifuge at the low rpm for a longer time ...   

what is the size of your gold nanoparticles? -Unless they are extrememly small (less than 10 nm), centrifugation always works.

If the centrifugation really does not work in your case, you can also try dialysis against water to remove small molecules.
4楼2011-08-17 14:20:28
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