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vwangvhaov

木虫 (小有名气)

[求助] 二氧化硅包覆纳米粒子求助

做介孔二氧化硅包覆纳米粒子反应,参考一篇文献,可是怎么也重复不出来得到很好的结构,求有经验的朋友帮忙看下,小弟不胜感激。
In a typical procedure, 0.5 mL of the Fe3O4 nanocrystals in chloroform was poured into 5 mL of 0.55M aqueous cethyltrimethylammonium bromide (CTAB) solution and the resulting solution was stirred vigorously for 30 min. The formation of an  oil-in-water microemulsion resulted in a turbid brown solution. Then, the mixture was heated up to 60 degree and aged at that temperature for 10 min under stirring to evaporate the chloroform , resulting in a transparent black Fe3O4/CTAB solution. The resulting solution was added to a mixture of 45 mL of water and 0.3 mL of 2M NaOH solution and the mixture was heated up to 70oC under stirring. Then, 0.5 mL of  tetraethylorthosilicate (TEOS), 50  μL of RITC-APTES solution, and 3 mL of ethylacetate was added to the reaction solution in sequence.
    以上是文献上的方法,请做过的朋友给予帮助!万分感激~~~
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awen9817

新虫 (初入文坛)

你现在做出来了吗? 我也是刚做,不太明白乙酸乙酯和NaOH的作用
2楼2013-10-21 11:31:31
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