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纳米小闺女

铜虫 (小有名气)

[交流] 【求助】有合成金纳米溶胶的虫子么? 已有5人参与

谁合成过金纳米溶胶,粒子半径在12~15个纳米左右。

现在急需交流 178119426,谢谢
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sunjh298

银虫 (小有名气)


小木虫(金币+0.5):给个红包,谢谢回帖交流
Preparation of 2.5 x 10-4 M Gold Colloids (Sodium Citrate Reduction Method)

Make a solution of ~5.0 x 10-3M HAuCl4 in water. (0.1699 g HAuCl4 in 100 mL deionized H2O)
Take 1 mL of that solution and add it to another 18 mL of H2O.
Make a solution of 0.5% sodium citrate (0.25g in 50 mL of H2O).
Heat the 19 mL solution of HAuCl4 until it begins to boil.
Add 1 mL of 0.5% sodium citrate solution, as soon as boiling commences.
Continue heating until colour change is evident (pale purple).
Remove the solution from the heating element and continue to stir until it has cooled to room temperature.
Top the solution up to 20 mL to account for boiling.
15楼2010-04-22 08:19:30
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