Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, People's Republic of China.
Nanotechnology. 2011 Jan 14;22(2):025602. doi: 10.1088/0957-4484/22/2/025602. Epub 2010 Dec 7.
Stable gold nanoparticle (AuNP) colloids were synthesized in a class of quaternary ammonium-based room-temperature ionic liquids (QAILs), Me(3)NC(2)H(4)OHZn(n)Cl(2n + 1) (n = 1 or 2), by heating in air at 135-145 °C. The QAIL was employed as a solvent, a reducing agent, and as a stabilizer. The size of the QAIL-AuNPs can be varied between 20 and 40 nm by changing the reaction temperature. A symproportionation reaction was employed to further decrease the size of the AuNPs by the addition of Au(3+) ions. The surface covering of QAIL on the AuNPs had a significant impact on their surface plasmon resonance (SPR), which was red-shifted. The AuNPs synthesized by this simple and environmentally friendly reaction can be realized in several minutes and also exhibit high stability and good reproducibility, providing a new facile approach to metal nanoparticle preparation.
稳定的金纳米粒子（AuNP）胶体在一类季铵基室温离子液体（QAIL）中合成，[Me（3）NC（2）H（4）OH]（+）[Zn（n）Cl（2n + 1）]（-）（n = 1 或 2），在空气中加热至 135-145°C。QAIL 用作溶剂、还原剂和稳定剂。通过改变反应温度，QAIL-AuNPs 的尺寸可以在 20nm 到 40nm 之间变化。通过添加 Au（3+）离子，采用 symproportionation 反应进一步减小 AuNPs 的尺寸。QAIL 在 AuNPs 表面的覆盖对其表面等离子体共振（SPR）有显著影响，导致红移。通过这种简单且环保的反应合成的 AuNPs 可以在几分钟内实现，并且还表现出高稳定性和良好的重现性，为金属纳米粒子的制备提供了一种新的简便方法。
