Center for Biomedical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, HN 410082, China.
J Biomed Nanotechnol. 2009 Oct;5(5):573-8. doi: 10.1166/jbn.2009.1063.
The control and monitoring of gold nanorod growth are critical for maintaining the quality of gold nanorods. Through in situ spectroscopic determination of gold nanorod growth in cuvettes, we found that this growth correlates with the evolution of extinction spectra and solution colors. This spectroscopy provides a universal method for in situ observation of the chemical evolution of nano-materials using cuvettes as small reactors at ambient temperature. Synthesis of gold nanorods with high concentrations and high yields is scaled up by simply increasing the solute concentration of the growth solution. Under optimal synthetic conditions, a yield of up to 0.1 g of gold nanorods is obtained, and spectrum monitoring indicates the formation of few spherical gold nanoparticles.
金纳米棒生长的控制和监测对于保持金纳米棒的质量至关重要。通过在比色皿中对金纳米棒生长进行原位光谱测定，我们发现这种生长与消光谱和溶液颜色的演变有关。这种光谱学为在环境温度下使用比色皿作为小型反应器原位观察纳米材料的化学演变提供了一种通用方法。通过简单地增加生长溶液中溶质的浓度，就可以将高浓度和高产率的金纳米棒的合成放大。在最佳合成条件下，可获得高达 0.1 克的金纳米棒产量，光谱监测表明形成了少量球形金纳米颗粒。
