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Title: Infrared compatible rapid mixer to probe millisecond chemical kinetics

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/5.0121817· OSTI ID:1959867

Fast microfluidic mixers are a valuable tool for studying solution-phase chemical reaction kinetics and molecular processes with spectroscopy. However, microfluidic mixers that are compatible with infrared vibrational spectroscopy have seen only limited development due to the poor infrared transparency of the current microfabrication material. We describe the design, fabrication, and characterization of CaF2-based continuous flow turbulent mixers, which are capable of measuring kinetics in the millisecond time window with infrared spectroscopy, when integrated into an infrared microscope. Kinetics measurements demonstrate the ability to resolve relaxation processes with 1 millisecond time resolution, and straightforward improvements are described that should result in sub-100 µs time-resolution.

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014305; CHE-2155027; CHE-1856684
OSTI ID:
1959867
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Vol. 94 Journal Issue: 3; ISSN 0034-6748
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

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