College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Soochow, People's Republic of China.
Langmuir. 2017 Aug 1;33(30):7479-7485. doi: 10.1021/acs.langmuir.7b01635. Epub 2017 Jul 21.
The influence of temperature on the gold nanorod synthesis process and its effect on tailoring the size and aspect ratio have not been fully investigated and understood. A comprehensive study, involving SEM and TEM microscopy, Vis-NIR spectroscopy, quantitative data analysis and theoretical simulation, is performed to understand the effect of growth temperature on size, aspect ratio, and shape uniformity of gold nanorods that are synthesized by a recently developed binary-surfactant seed-mediated AuNR synthesis method. It has been demonstrated that the temperature can be used as a simple processing parameter to viably tailor the size and aspect ratio of AuNRs as well as the corresponding surface plasmon resonance behavior. The temperature coefficients for length, diameter, and aspect ratio have been, respectively, determined to be 3.5 nm/°C, 3.9 nm/°C, and -0.18/°C. With a combination of controlling temperature and formulation, the binary surfactant seed-mediated AuNR synthesis method expects to be a convenient way for producing gold nanorods with a large range of size and aspect ratio suitable for different applications.
温度对金纳米棒合成过程的影响及其对尺寸和纵横比的调控作用尚未得到充分的研究和理解。本研究采用 SEM 和 TEM 显微镜、可见-近红外光谱、定量数据分析和理论模拟等手段，全面研究了生长温度对通过二元表面活性剂种子介导的 AuNR 合成方法制备的金纳米棒的尺寸、纵横比和形状均匀性的影响。结果表明，温度可作为一种简单的处理参数，有效地调控 AuNR 的尺寸和纵横比以及相应的表面等离子体共振行为。长度、直径和纵横比的温度系数分别为 3.5nm/°C、3.9nm/°C 和-0.18/°C。通过控制温度和配方相结合，二元表面活性剂种子介导的 AuNR 合成方法有望成为一种方便的方法，可用于制备适用于不同应用的具有较大尺寸和纵横比范围的金纳米棒。
