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[求助]
求助合成4-5nm的金納米顆粒的方法 已有3人參與
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| 請(qǐng)大家?guī)兔,我現(xiàn)在急需要4-5nm的金納米顆粒,由于需要后續(xù)修飾巰基,因此不能用巰基穩(wěn)定劑穩(wěn)定,最好是用檸檬酸三鈉穩(wěn)定,我之前用過(guò)檸檬酸三鈉和單寧酸來(lái)制備,但是粒徑比較大,而且我擔(dān)心單寧酸分子量比較大會(huì)不會(huì)影響后續(xù)修飾?因此想求助用檸檬酸三鈉和硼氫化鈉制備金納米顆粒的方法,請(qǐng)各路大神不吝賜教,感激之至! |
納米材料 | 納米金 |

新蟲(chóng) (正式寫(xiě)手)

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6納米左右 Monodisperse I-IL-Au NPs were prepared by the reduction of HAuCl4 with sodium borohydride (NaBH4) according to the previous work [20–22] . In brief, firstly the fresh sodium borohy-dride solution (NaBH4, 1 mL, 4.5 mg mL−1) was added dropwise to 100 mL aqueous solution of HAuCl4(1 mL, 8.9 mg mL−1) under vigorous stirring at room temperature. About 15 min, a vivid red colored solution was produced. Finally, after added the amino-functionalized ionic liquid, the gold colloidal solution was stirred for another 2 h to ensure self-assembly of the ionic liquid onto the surface of gold nanoparticles. The synthesized I-IL-AuNPs were purified by centrifugation and redispersed in double-distilled,deionized water twice. The final concentration of I-IL-Au NPs were 57.29 nM calculated using Beer’s law with the extinction coefficients (ε) of 1.1 × 107M−1cm−1 for Au NPs of 5.6 ± 0.4 nm diameter。 |

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