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Modeling Electrical Double-Layer Effects for Microfluidic Impedance Spectroscopy to 110 GHz

June 30, 2017

Author(s)

Charles A. Little, Nathan D. Orloff, Christian J. Long, James C. Booth

Complex impedance measurements of fluids provide unique electrical information with important applications for chemical and pharmacological synthesis, and medical diagnostics. Many relevant fluids are ionic. During electrical measurement, ions in the fluid

Jetting of a shear banding fluid in a rectangular duct

March 14, 2017

Author(s)

Paul NMN Salipante, Charles A. Little, Steven D Hudson

We report on a jetting flow instability of shear banding worm-like micelle (WLM) solutions in microfluidic channels with rectangular cross-sections over an intermediate volumetric flow regime. Particle tracking methods are used to measure the three

A scoring metric for multivariate data for reproducibility analysis using chemometric methods

December 23, 2016

Author(s)

David A. Sheen, Werickson Fortunato de Carvalho Rocha, Katrice A. Lippa, Dan Bearden

Process quality control and reproducibility in emerging measurement fields such as metabolomics is normally assured by interlaboratory comparison testing. As a part of this testing process, spectral features from a spectroscopic method such as nuclear

Communication-Comparison of Nanoscale Focused Ion Beam and Electrochemical Lithiation in beta-Sn Microspheres

December 5, 2016

Author(s)

Saya Takeuchi, William R. McGehee, Jennifer L. Schaefer, Truman M. Wilson, Kevin A. Twedt, Christopher L. Soles, Vladimir P. Oleshko, Eddie H. Chang, Jabez J. McClelland

The development of Li focused ion beams (Li-FIB) enables controlled Li ion insertion into materials with nanoscale resolution. We take the first step toward establishing the relevance of the Li-FIB for studies of ion dynamics in electrochemically active

FINE-TUNING ELECTRICAL FLOW RATE SENSING IN DEFORMABLE CHANNELS

October 9, 2016

Author(s)

Pengfei Niu, Brian J. Nablo, Kiran Bhadriraju, Darwin Reyes-Hernandez

Here we present conclusive proof that when using electrical impedance to measure volumetric flow rate in polydimethylsiloxane (PDMS) microchannels a considerable fraction of the change in impedance, due to change in flow rate, is caused by the variation in

Classification of biodegradable materials using QSAR modeling with uncertainty estimation

October 6, 2016

Author(s)

Werickson Fortunato de Carvalho Rocha, David Sheen

The ability to determine the biodegradability of chemicals without resorting to expensive tests is ecologically and economically desirable. Models based on quantitative structure-activity relations (QSAR) provide some promise in this direction. However

Application of the advanced distillation curve method for the characterization of two alternative transportation fuels prepared from the pyrolysis of polyethylene bags*

September 15, 2016

Author(s)

Thomas J. Bruno, Megan E. Harries, B. K. Sharma, Bidhya Kunwar

The properties of alternative fuels must be evaluated to determine their suitability for use in existing engines, either as blends with conventional petroleum products or as stand-alone substitutions (that is, drop in replacements). Alternative fuels made

Computer-Aided Molecular Design and Selection of CO2 Capture Solvents Based on Thermodynamics, Reactivity and Sustainability

August 10, 2016

Author(s)

Alexandros Chremos, Athanasios Papadopoulos, Sara Badr, Esther Forte, Theodoros Zarogiannis, Panos Seferlis, Stavros Papadokonstantakis, Amparo Galindo, George Jackson, Claire Adjiman

The identification of improved carbon dioxide (CO2) capture solvents remains a challenge due to the vast number of potentially-suitable molecules. We propose an optimization-based computer- aided molecular design (CAMD) method to identify and select, from

Psychrometric Properties of Humid Air from Multi-Fluid Helmholtz-Free-Energy-Explicit Models

July 11, 2016

Author(s)

Ian H. Bell, Eric W. Lemmon, Allan H. Harvey

Psychrometric properties of humid air are widely used in the analysis and modeling of thermal systems. In this work we present a method for obtaining these properties from the multi-fluid mixture formulation forming the so-called GERG mixture model. This

Optofluidic Temperature and Pressure Measurements with Fiber Bragg Gratings Embedded in Microfluidic Devices

May 21, 2016

Author(s)

Gregory A. Cooksey, Zeeshan Ahmed

The integration of photonic sensors into microfluidic devices provides opportunities for dynamic measurement of chemical and physical properties of fluids in very small volumes. We previously reported on the use of commercially available Fiber Bragg

From Microgalaxies to Micro-oceans to Warhols Cellular Images: The Art in Science of MicroTAS 2015

March 31, 2016

Author(s)

Darwin R. Reyes-Hernandez

Acoustic and microwave tests in a cylindrical cavity for acoustic gas thermometry at high temperature

February 22, 2016

Author(s)

K. Zhang, X.J. Feng, Keith A. Gillis, Michael R. Moldover, Jintao Zhang, Hong Lin, Jifeng Qu

Relative primary acoustic gas thermometry determines the ratios of thermodynamic temperatures from measured ratios of acoustic and microwave resonance frequencies in a gas-filled metal cavity on isotherms of interest. When measured in a cavity with known

Impact of and correction for instrument sensitivity drift on nanoparticle size measurements by single-particle ICP-MS

February 8, 2016

Author(s)

Hind El Hadri, Elijah Petersen, Michael R. Winchester

Engineered nanomaterials (ENMs) are already incorporated into numerous consumer products, and increasing product applications are expected in future years. To enable an understanding of potential risks associated with these products, it is important to