Völkl A, Klupp Taylor R (2022)
Publication Type: Journal article, Original article
Publication year: 2022
Book Volume: 181
Pages Range: 133-143
DOI: 10.1016/j.cherd.2022.03.016
Patchy particles, which comprise a core particle of one material partially covered by a
thin layer of another, offer great promise for tailored particle-based materials and
devices in the future. This study concerns the investigation and improvement of a
potentially gram-scalable continuous flow process based on a cascade of two T-mixers
for the synthesis of thin, conformal silver patches on colloidal silica particles. The
starting point of the work is the observation that on seemingly random occasions the
process results in patches having undesired spiky protrusions. Through a systematic
study of reagent ageing supported by scanning electron microscopy, optical
spectroscopy and chemical equilibrium calculations it can be ascertained that the
desired product morphology is only obtained through carbon dioxide absorption by the
dilute ammonia solution used in the reaction. It is shown that the ageing process can
be emulated for fresh reagents by addition of ammonium nitrate or nitric acid.
APA:
Völkl, A., & Klupp Taylor, R. (2022). Investigation and mitigation of reagent ageing during the continuous flow synthesis of patchy particles. Chemical Engineering Research & Design, 181, 133-143. https://dx.doi.org/10.1016/j.cherd.2022.03.016
MLA:
Völkl, Andreas, and Robin Klupp Taylor. "Investigation and mitigation of reagent ageing during the continuous flow synthesis of patchy particles." Chemical Engineering Research & Design 181 (2022): 133-143.
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