Synthesis of Gold Nanorods

最新推荐文章于 2025-03-06 11:08:06 发布

原创最新推荐文章于 2025-03-06 11:08:06 发布 · 530 阅读

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本文介绍了一种利用银辅助种子生长法制备金纳米棒的方法。通过将四氯金酸还原为硼氢化钠，在十二烷基三甲基溴化铵（CTAB）溶液中形成种子。随后，将这些种子加入到包含CTAB、四氯金酸、抗坏血酸、硝酸银和盐酸的生长溶液中，并在30°C下静置2小时。最终产物经过离心去除过量试剂并重新分散在CTAB溶液中。使用透射电子显微镜（TEM）和紫外可见光谱仪进行了表征。

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Gold nanorods were prepared using Ag-assisted seeded growth.25,26 Seeds were prepared by reduction of HAuCl4 (0.25 mM, 5 mL) with freshly prepared NaBH4 (10 mM, 0.3 mL) in aqueous CTAB solution (100 mM). After 30 min, an aliquot of seed solution (0.55 mL) was added to a growth solution (250 mL) containing CTAB (100 mM), HAuCl4 (0.5 mM), ascorbic acid (0.8 mM), AgNO3 (0.12 mM), and HCl (19 mM). The mixture was left undisturbed at 30 °C for 2 h. The solution was centrifuged twice (8000 rpm, 30 min) to remove excess silver salt, ascorbic acid, CTAB, and HCl and redispersed in CTAB (100 mM).

Characterization. TEM images were obtained with a JEOL JEM-1400PLUS transmission electron microscope operating at an acceleration of 120 kV. UV−vis spectra were measured with an Agilent 8453 UV−vis spectrophotometer.

文献：Blocked Enzymatic Etching of Gold Nanorods: Application to Colorimetric Detection of Acetylcholinesterase Activity and Its Inhibitors