Angela C. Stelson
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View article: Detecting ion pairing in sodium fluoride solutions with dielectric spectroscopy
Detecting ion pairing in sodium fluoride solutions with dielectric spectroscopy Open
The dielectric response of an ionic solution includes ionic diffusion, solvent molecule reorientation, and the intermolecular interactions between solvent, cations, and anions. While ionic diffusion and solvent reorientation produce large …
View article: Glass Microwave Microfluidic Devices for Broadband Characterization of Diverse Fluids
Glass Microwave Microfluidic Devices for Broadband Characterization of Diverse Fluids Open
We demonstrate a glass microwave microfluidic device for determining the permittivity of a wide range of liquid chemicals from 100 MHz to 30 GHz with associated uncertainties. Conventional microwave microfluidic devices use polymer-based m…
View article: A Distributed Theory for Contactless Interconnects at Terahertz Frequencies
A Distributed Theory for Contactless Interconnects at Terahertz Frequencies Open
We test a multimodal analytical model for distributed contactless interconnects by comparing it to 3-D full-wave simulations. In comparison to 3-D simulations, the model offers insight into how the interconnect works and reduces the comput…
View article: Solid-liquid interfaces: Atomic-scale structure and dynamics
Solid-liquid interfaces: Atomic-scale structure and dynamics Open
International audience
View article: Quantifying the Effect of Guest Binding on Host Environment
Quantifying the Effect of Guest Binding on Host Environment Open
The environment around a host-guest complex is defined by intermolecular interactions between the complex, solvent molecules, and counterions. These interactions govern both the solubility of these complexes and the rates of reactions occu…
View article: Broadband Electromagnetic Properties of Engineered Flexible Absorber Materials
Broadband Electromagnetic Properties of Engineered Flexible Absorber Materials Open
Flexible and stretchable materials have attracted significant interest in wearable electronics and bioengineering fields. Recent developments also incorporate embedded microwave circuits and systems with engineered flexible materials that …
View article: Measuring the anisotropic permittivity tensor of DyScO3 to 110 GHz
Measuring the anisotropic permittivity tensor of DyScO3 to 110 GHz Open
DyScO3 (DSO) is an attractive substrate on which to grow epitaxial thin films with extraordinary materials physics. However, its highly anisotropic permittivity makes some measurements exceedingly difficult: For instance, its permittivity …
View article: Physical models and dimensional traceability of 2.4 mm coaxial airline standards for determining systematic uncertainties of calibrated scattering-parameters
Physical models and dimensional traceability of 2.4 mm coaxial airline standards for determining systematic uncertainties of calibrated scattering-parameters Open
In this report, we document the models and dimensional traceability of our 2.4 mm coaxial airline standards for performing multiline thru-reflect-line calibrations up to 50 GHz using vector network analyzers. We identify the equations used…
View article: Simulating dielectric spectra: A demonstration of the direct electric field method and a new model for the nonlinear dielectric response
Simulating dielectric spectra: A demonstration of the direct electric field method and a new model for the nonlinear dielectric response Open
We demonstrate a method to compute the dielectric spectra of fluids in molecular dynamics (MD) by directly applying electric fields to the simulation. We obtain spectra from MD simulations with low magnitude electric fields (≈0.01 V/Å) in …
View article: Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters
Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters Open
In this report, we document the models and dimensional traceability of our WR15 rectangular waveguide standards for performing multiline thru-reflect-line calibrations from 50 GHz to 75 GHz using vector network analyzers.We identify the eq…
View article: Theoretical basis of the direct-comparison system for power calibration including equivalent source mismatch
Theoretical basis of the direct-comparison system for power calibration including equivalent source mismatch Open
In this report, we provide derivations for two equations that serve as the basis for the directcomparison system, a transfer apparatus for comparing microwave power sensors.The system consists of a synthesizer that provides a signal to the…
View article: Measuring ion-pairing and hydration in variable charge supramolecular cages with microwave microfluidics
Measuring ion-pairing and hydration in variable charge supramolecular cages with microwave microfluidics Open
Metal-organic supramolecular cages can act as charged molecular containers that mediate reactions, mimic enzymatic catalysis, and selectively sequester chemicals. The hydration of these cages plays a crucial role in their interactions with…
View article: Label-free detection of conformational changes in switchable DNA nanostructures with microwave microfluidics
Label-free detection of conformational changes in switchable DNA nanostructures with microwave microfluidics Open
Detection of conformational changes in biomolecular assemblies provides critical information into biological and self-assembly processes. State-of-the-art in situ biomolecular conformation detection techniques rely on fluorescent labels or…
View article: SELF-ASSEMBLED ANISOTROPIC COLLOID SYSTEMS FOR PHOTONIC APPLICATIONS
SELF-ASSEMBLED ANISOTROPIC COLLOID SYSTEMS FOR PHOTONIC APPLICATIONS Open
Photonic crystals are optical structures periodic on the length scale of light, and support useful attributes including photonic bandgaps (ranges of frequencies forbidden from propagating in the material), negative refraction and slow ligh…