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[求助]
制作Ag纳米颗粒的问题
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我根据赵东元老师的文献 Core-shell Ag@SiO2@mSiO2 mesoporous nanocarriers for metal-enhanced fluorescence 来合成Ag纳米粒子，具体步骤是： Ag nanoparticles with diameter about 50 nm were synthesized in large scale via a modified method reported by Xia et al.1 2.5 g of PVP (Mw = 55000) was dissolved in 200 mL of ethylene glycol before 0.5 g of AgNO3 was added. After the three-neck flask was settled in an oil bath, the mixture was then heated to ~ 130 °C within 25 min under vigorous stirring and maintained at 130 °C for 1 h to obtain the Ag nanoparticles. The nanoparticles were isolated by precipitating the solution with acetone (800 mL), followed by centrifugation at 10000 rpm for 3 min, and re-dispersed in 4 mL of ethanol to obtain the 0.05 g (Ag nanoparticles)/mL solution. 请问，按照它的步骤，最后的产物溶入4ml的乙醇中，得到0.05g/ml的Ag溶胶。这个浓度是怎么计算的，是否应该是溶入10ml的乙醇中才得到这一浓度？搞不懂~望大侠指教~ 万分感谢。  |
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cedar3031
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16楼2012-05-09 15:14:18
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