The National Institute of Standards and Technology (NIST) uses electromagnetic waves (100 Hz to 1 THz frequencies) to characterize material properties, including composition and reactivity. Our electromagnetic measurements can be used to screen candidate materials and monitor various electrical, chemical, and mechanical processes. In fluid systems, these measurements can be combined with theory to quantify intermolecular interactions including ion-pairing and hydration. To advance the state-of-the-art in electrical property measurement, NIST developed a suite of tools for measuring materials<sup>1</sup>, which includes new techniques for fluids<sup>2</sup>, nonlinear dielectrics, and composites. Here, I will preset our microwave microfluidic method to perform broadband dielectric spectroscopy of fluids from 70 kHz to 110 GHz. I will provide a detailed summary of our calibrations, devices, and measurements. I will close by discussing our measurements of DNA tweezers and how microwave measurements detected open and closed confirmations.

Microwave measurements for fluids

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.