Sedimentation Dynamics of Colloidal Formulations through Direct Visualization: Implications for Fuel Cell Catalyst Inks,ACS Applied Nano Materials

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Sedimentation Dynamics of Colloidal Formulations through Direct Visualization: Implications for Fuel Cell Catalyst Inks
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-07-10 , DOI: 10.1021/acsanm.0c01467
Shalmali Bapat ₁ , Doris Segets _{1,

2}

Affiliation

Quantitative appraisal of real-world colloidal systems in their native state is key for knowledge-based nanoparticle formulations. Analytical centrifugation (AC) is touted as a quantitative methodology examining settling and creaming of dispersions, but an understanding of the main transmission readout is often nonintuitive and complex. Herein, we introduce a new visualization technique, called transmittograms, that readily depicts the time-resolved settling behavior of solid–liquid dispersions, measured by AC. We validate the utility of transmittogram analysis using silica particles. Further, we demonstrate the strength of the approach to study the nanoscale dynamics in complex fuel cell inks.

中文翻译：

通过直接可视化的胶体配方沉淀动力学：对燃料电池催化剂油墨的影响

定量评估真实状态下胶体系统的原始状态是基于知识的纳米粒子配方的关键。分析离心（AC）被认为是一种定量方法，用于检查分散体的沉降和乳化，但是对主要透射率读数的理解通常是不直观且复杂的。在这里，我们介绍了一种称为透射图的新可视化技术，该技术可以轻松描述通过AC测量的固液分散体的时间分辨沉降行为。我们验证了使用二氧化硅颗粒进行透射图分析的实用性。此外，我们证明了研究复杂燃料电池墨水中纳米级动力学的方法的优势。

更新日期：2020-08-28

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