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nagisan金蟲 (小有名氣)
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[求助]
求助:檸檬酸三鈉法制備15nm左右的銀納米顆粒
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想用檸檬酸三鈉發(fā)制備得到15nm左右的銀納米顆粒,不知道各位有沒有意見,求賜教,必有重賞的。。。多謝啊~~~~~ [ Last edited by congqin312 on 2013-10-22 at 14:42 ] |
拉曼 測試 增強(qiáng) 應(yīng)用 |
金蟲 (小有名氣)
專家顧問 (著名寫手)
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專家經(jīng)驗(yàn): +208 |
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可以看看最近的這篇工作,利用種子法獲得檸檬酸鈉穩(wěn)定的單分散的膠體銀,所有合成步驟都是基于水相的,無需特殊設(shè)備或是pH的額外控制。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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