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nagisan金虫 (小有名气)
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[求助]
求助：柠檬酸三钠法制备15nm左右的银纳米颗粒
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想用柠檬酸三钠发制备得到15nm左右的银纳米颗粒，不知道各位有没有意见，求赐教，必有重赏的。。。多谢啊~~~~~ [ Last edited by congqin312 on 2013-10-22 at 14:42 ] |
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nanofellow
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【答案】应助回帖
感谢参与，应助指数 +1
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可以看看最近的这篇工作，利用种子法获得柠檬酸钠稳定的单分散的胶体银，所有合成步骤都是基于水相的，无需特殊设备或是pH的额外控制。文章我放在附件里面了。 Wan Y, Guo Z, Jiang X, Fang K, Lu X, Zhang Y, Gu N: Quasi-spherical silver nanoparticles: Aqueous synthesis and size control by the seed-mediated Lee-Meisel method. J Colloid Interface Sci 2013, 394:263-268. ABSTRACT Silver nanoparticles (AgNPs) are attracting tremendous attention in biomedicine, and their related performances are shape and size-dependent. For biomedical applications, water-soluble AgNPs are necessary. However, aqueous syntheses of AgNPs with controlled shape and size are relatively difficult as the balance between nucleation and growth is hard to regulate. This paper describes a robust method for controllable synthesis of quasi-spherical AgNPs based on the combination of the seed-mediated growth and the Lee–Meisel method by thermal reduction of AgNO3with citrate. In the presented method, citrate-stabilized AgNPs with tunable sizes up to 80 nm were achieved through one-step or stepwise growth process using qualified spherical 4 nm AgNPs as starter seeds. Specially, the two main difficulties (formation of nanorods and secondary nucleation during the growth stage) in the previous studies have been effectively overcome by tailoring the experimental parameters such as the reaction temperature and the seed amount, without extra additives, pH adjustment, and laser treatment. The crucial factors that affect the uniformity of the resulting AgNPs are discussed. |
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2013-10-22 15:01:14, 1.4 M
2楼2013-10-22 15:01:22
nagisan
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3楼2013-10-22 15:22:14
