纳米颗粒
表面电荷
库尔特计数器
电动现象
碳纳米管
分散性
纳米技术
材料科学
Zeta电位
滴定法
电泳
表征(材料科学)
分析化学(期刊)
化学
色谱法
无机化学
高分子化学
物理化学
分子生物学
生物
作者
Takashi Ito,Lei Sun,Ronald R. Henriquez,Richard M. Crooks
摘要
This Account reports on the properties and applications of carbon nanotube-based Coulter counters (CNCCs). CNCCs provide a means for determining the diameter and electrophoretic mobility (or electrokinetic surface charge) of individual nanoparticles dispersed in aqueous solutions, as well as the nanoparticle concentration. Such measurements do not require CNCC calibration or sample labeling. Because CNCCs measure the characteristics of individual particles, they provide the true average and polydispersity distribution of nanoparticle properties. CNCCs can differentiate between individual nanoparticles based on their surface charge and size, and CNCCs can be used to determine the apparent surface pK(a) of polymeric nanoparticles. Nanoparticle characterization by CNCC, electron microscopy, conductometric titration, and light scattering are compared.
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