Size-controlled synthesis of machinable single crystalline gold nanoplates
Size-controlled synthesis of machinable single crystalline gold nanoplates
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DOI：
10.1021/cm051225h
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发表时间：
2005-11-01
影响因子：
8.6
通讯作者：
Yun, WS
中科院分区：
文献类型：
--
作者：
Ah, CS;Yun, YJ;Yun, WS
在聚乙烯吡咯烷酮(PVP)存在下，通过还原反应动力学控制的柠檬酸钠还原四氯金酸氢制备了高纯度的单分散尺寸可控金纳米片。在还原剂加入量不足的情况下，柠檬酸钠和PVP与四氯金酸氢的摩尔比对产物的几何形状和尺寸有重要影响。这些纳米板为单晶，平面宽度为80-500 nm，厚度为10-40 nm，在700-2000 nm的近红外(NIR)区域表现出较强的表面等离子体吸收。利用金纳米板作为人工合成的纳米块来制备单晶纳米元件，如纳米级齿轮或纳米级字母。
Monodispersive size-controlled gold nanoplates were synthesized with high purity from the reduction of hydrogen tetrachloroaurate by reduced amount of sodium citrate, which kinetically controls the reaction pathway, in the presence of poly(vinyl pyrrolidone) (PVP). With the insufficient addition of the reductant, the molar ratio of sodium citrate and PVP relative to hydrogen tetrachloroaurate played an important role in determining the geometric shape and size of the product. These nanoplates were single crystals with planar width of 80-500 nm and thickness of 10-40 nm, exhibiting strong surface plasmon absorption in the near-infrared (NIR) region of 700-2000 nm. The gold nanoplates were used as the synthetically provided nanoblocks to fabricate single-crystalline nanocomponents, such as a nanoscaled gear or a nanoscaled letter.