Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058, Erlangen, Germany.
Mathematical Optimization, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 11, 91058, Erlangen, Germany.
Nat Commun. 2018 Nov 21;9(1):4898. doi: 10.1038/s41467-018-07366-9.
Properties of nanoparticles are influenced by various parameters like size, shape or composition. Comprehensive high throughput characterization techniques are urgently needed to improve synthesis, scale up to production and make way for new applications of multidimensional particulate systems. In this study, we present a method for measuring two-dimensional size distributions of plasmonic nanorods in a single experiment. Analytical ultracentrifuge equipped with a multiwavelength extinction detector is used to record the optical and sedimentation properties of gold nanorods simultaneously. A combination of sedimentation and extinction properties, both depending on diameter and length of the dispersed nanorods, is used to measure two-dimensional distributions of gold nanorod samples. The length, diameter, aspect ratio, volume, surface and cross-sectional distributions can be readily obtained from these results. As the technique can be extended to other non-spherical plasmonic particles and can be used for determining relative amounts of particles of different shapes it provides complete and quantitative insights into particulate systems.
纳米粒子的性质受多种参数的影响，如尺寸、形状或组成。综合高通量的表征技术是迫切需要的，以改善合成、放大到生产，并为多维颗粒系统的新应用开辟道路。在本研究中，我们提出了一种在单次实验中测量等离子体纳米棒二维尺寸分布的方法。配备多波长消光检测器的分析超速离心机用于同时记录金纳米棒的光学和沉降性质。沉降和消光性质的组合，都取决于分散纳米棒的直径和长度，用于测量金纳米棒样品的二维分布。从这些结果中可以很容易地得到长度、直径、纵横比、体积、表面和横截面分布。由于该技术可以扩展到其他非球形等离子体颗粒，并可用于确定不同形状颗粒的相对数量，因此它为颗粒系统提供了完整和定量的见解。
