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The study presents a unifying methodology for characterizing micromixers, integrating both experimental and simulation techniques. Focusing on Dean mixer designs, it employs an optical evaluation for experiments and a modified Sobolev norm for simulations, yielding a unified dimensionless characteristic parameter for the whole mixer at a given Reynolds number. The results demonstrate consistent mixing performance trends across both methods for various operation points. This paper also proposes enhancements in the evaluation process to improve accuracy and reduce noise impact. This approach provides a valuable framework for optimizing micromixer designs, essential in advancing microfluidic technologies. [ABSTRACT FROM AUTHOR]

We are presenting an easy synthetic access to the aqueous synthesis of truncated trigonal silver nanobipyramids with tunable width and height in a facile two step synthesis. We modified a synthesis that employs seed particles with twinning faults on which silver is deposited laterally along the twinning fault, leading to flat particles. The ratio of lateral and vertical growth is adjusted by the co-titration of further noble metal salts at nanomolar concentrations alongside the silver precursor. Thus, besides the edge lengths, the thickness and related aspect ratio of metal bipyramids can be tuned. By tracking the growth of the particles via their localized surface plasmon resonance position during the reaction using optical transmission spectroscopy, we present insights into the modification of the growth mechanism for truncated silver nanobipyramids., (© 2024 The Authors. ChemPhysChem published by Wiley-VCH GmbH.)