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Materials

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Displaying 451 - 475 of 2328

Graph Neural Network Predictions of Metal Organic Framework CO2 Adsorption Properties

July 1, 2022
Author(s)
Kamal Choudhary, Taner N. Yildirim, Daniel Siderius, A. Gilad Kusne, Austin McDannald, Diana Ortiz-Montalvo
The increasing CO$_2$ level is a critical concern and suitable materials are needed to directly capture such gases from the environment. While experimental and conventional computational methods are useful in finding such materials, they are usually slow

Growth and Decomposition of Pt Surface Oxides

June 28, 2022
Author(s)
Feng Yi, Shane Arlington, Justin Gorham, William Alexander Osborn, Slavomir Nemsak, Ethan Crumlin, David A. LaVan
The formation and thermal stability of Pt surface oxides on Pt thin film were studied in situ using ambient pressure x-ray photoelectron spectroscopy (AP-XPS). AP-XPS allows us to monitor the chemical states of both adsorbed reactants and underlying

Broadband Dielectric Spectroscopic Detection of Ethanol: A Side-by-Side Comparison of ZnO and HKUST-1 MOFs as Sensing Media

June 25, 2022
Author(s)
Papa Amoah, Pentao Lin, Zeinab Mohammed Hassan, Rhonda Franklin, Engelbert Redel, Helmut Baumgart, Yaw S. Obeng
Changes in the chemo-electrical intrinsic properties of metal-oxide materials (MO) are commonly used as the basis of gas sensors. The most common gas sensors are based on chemically induced changes in electrical resistivity which necessarily involve making

Properties of Refrigerants

June 22, 2022
Author(s)
Marcia L. Huber, Mark O. McLinden
This table gives physical properties, safe exposure limits, GWP and ODP for compounds that have been used as working fluids in traditional refrigeration systems or are under consideration as replacements in newer systems. Some are also used as solvents

Major to Trace Element Imaging and Analysis of Iron Age Glasses Using Stage Scanning in The Analytical Dual Beam Microscope (Tandem)

June 16, 2022
Author(s)
Edward P. Vicenzi, Thomas Lam, Jamie Weaver, Andrew Herzing, John McCloy, Rolf Sjoblom, Carolyn Pearce
Dark and clear silicate glasses formed during an iron age vitrification event ≈ 1500 years ago at the Broborg hillfort near Uppsala, Sweden have been analyzed using a scanning electron microscope equipped with a micro-X-ray fluorescence (μXRF) spectrometer

Engineering 3D Printed Scaffolds with Tunable Hydroxyapatite

June 15, 2022
Author(s)
Yoontae Kim, Eun Jin Lee, Anthony Kotula, Shozo Takagi, Laurence C. Chow, Styliani Alimperti
Bone grafting is a surgical procedure to bone repair due to trauma or diseases in the craniofacial and dental area. Current limitations of autogenous and allogeneic grafts are often associated with reduced host-graft integration due to geometrical confor

Turning Molecular Springs into Nano-Shock Absorbers: The Effect of Macroscopic Morphology and Crystal Size on the Dynamic Hysteresis of Water Intrusion-Extrusion into-from Hydrophobic Nanopores

June 15, 2022
Author(s)
Pawel Zajdel, David Madden, Robin Babu, Diego Mirani, Nikolay Tsyrin, Luis Bartolome, Eder Amayuelas, David Fairen-Jimenez, Alexander Lowe, Miroslaw Chorazewski, Juscelino Leao, Craig Brown, Markus Bleuel, Victor Stoudenets, Maria Echeverria, Francisco Bonilla, Giulia Grancini, Simone Meloni, Yaroslav Grosu
Controlling the pressure at which liquids intrude (wet) and extrude (dry) into/from nanopore is of paramount importance for a broad range of applications, such as energy conversion, catalysis, chromatography, separation, ionic channels, and many more. To

Evidence that gecko setae are coated with an ordered nanometer-thin lipid film

June 9, 2022
Author(s)
Cherno Jaye, Daniel A. Fischer, Mette Rasmussen, Katinka Holler, Joe Baio, Stanislav Gorb, Tobias Weidner
Motivated by the fascination of gecko adhesion based on the fibrous setae at the tips of their toe pads and their potential for biomimetic applications, the adhesion mechanism has been studied in detail. While the mechanism has been shown to be based on

High Energy X-Ray Diffraction and Small-Angle Scattering Measurements of Hydrogen Fatigue Damage in AISI 4130 Steel

June 4, 2022
Author(s)
Matthew Connolly, May Ling Martin, Peter Bradley, Damian Lauria, Andrew Slifka, Jun-Sang Park, Robert Amaro, Jonathan Almer
Accurate lifetime predictions are critical for repurposing existing pipelines for hydrogen transmission as well as for developing novel steels which are minimally susceptible to lifetime degradation by hydrogen. Ultimately, lifetime prediction models

Assessment of intra-build variations in tensile strength in electron beam powder-bed fusion Ti-6Al-4V part 1: Effects of build height

June 2, 2022
Author(s)
Nicholas Derimow, Alejandro Romero, Aldo Rubio, Cesar Terrazas, Newell Moser, Orion Kafka, Jake Benzing, Francisco Medina, Ryan Wicker, Nik Hrabe
In this work, rectangular blocks of electron beam powder-bed fusion (PBF-EB) additively manufactured (AM) Ti-6Al-4V were built, such that a total of 68 mini-tensile test coupons could be extracted for mechanical testing over a range of build height and

On-the-Fly Autonomous Control of Neutron Diffraction via Physics-Informed Bayesian Active Learning

June 1, 2022
Author(s)
Austin McDannald, Matthias Frontzek, Andrew Savici, Mathieu Doucet, Efrain Rodriguez, Kate Meuse, Jessica Opsahl-Ong, Daniel Samarov, Ichiro Takeuchi, William Ratcliff, A. Gilad Kusne
We demonstrate the first live, autonomous control over neutron diffraction experiments by developing and deploying ANDiE: the autonomous neutron diffraction explorer. Neutron scattering is a unique and versatile characterization technique for probing the

STEM-in-SEM: A Re-Emerging Material Measurement Approach

June 1, 2022
Author(s)
Bob R. Keller, Benjamin Caplins, Jason Holm
Scanning transmission electron microscopy performed in a scanning electron microscope (STEM-in-SEM) is undergoing a striking resurgence, with continuing developments in methodology and hardware, as well as applications to a wide range of materials in

Assessment of intra-build variations in tensile strength in electron beam powder-bed fusion Ti-6Al-4V part 2: Effects of powder mixing

May 31, 2022
Author(s)
Nicholas Derimow, Jake Benzing, Orion Kafka, Newell Moser, Priya Pathare, Michael Walker, Frank DelRio, Nik Hrabe
In Part 2 of this paper series, high-throughput tensile testing and characterization of porosity, microstructure, and oxygen content was carried out on Ti-6Al-4V samples that were fabricated via electron beam powder-bed fusion (PBF-EB) to test our
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