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4Â¥2013-12-05 21:32:05
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6ÄÉÃ××óÓÒ Monodisperse I-IL-Au NPs were prepared by the reduction of HAuCl4 with sodium borohydride (NaBH4) according to the previous work [20¨C22] . 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 (¦Å) of 1.1 ¡Á 107M−1cm−1 for Au NPs of 5.6 ¡À 0.4 nm diameter¡£ |
2Â¥2013-12-04 19:19:13
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3Â¥2013-12-05 21:15:55
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| ¿´¿´ an improved synthesis of high aspect ratio gold nanorod, ÎÒ×ö³öÀ´ÎüÊÕÔÚ504nm×óÓÒ£¬ orange red color |
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