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Chemistry

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Displaying 126 - 150 of 1916

Detailed analysis of the synthesis and structure of MAX phase (Mo0.75V0.25)5AlC4 and its MXene (Mo0.75V0.25)5C4

June 27, 2023
Author(s)
Rose Snyder, Mikkel Juelsholt, Curran Kalha, Jason Holm, Elisabeth Mansfield, Tien-Lin Lee, Pardeep Thakur, Aysha Riaz, Benjamin Moss, Anna Regoutz, Christina Birkel
MAX phases with the general formula Mn+1AXn are layered carbides, nitrides and carbonitrides with varying stacking sequence of layers of M6X octahedra and the A-element depending on n. While "211" MAX phases (n = 1) are very common, MAX phases with higher

mDTEB, a new fluorescent label for carbohydrate nano-material in vivo studies

May 27, 2023
Author(s)
Jeremiah Woodcock, Douglas M. Fox, Ilabahen A. Patel, Joy Dunkers, Stephan J. Stranick, Jeffrey W. Gilman
Typical studies of gastral toxicity are conducted using radio labeling. This tends to be quite expensive and difficult owing to the required protocols for working with these materials and the expense of the chemical reagents. A possible alternative is

Reference Isotherms for Water Vapor Sorption on Nanoporous Carbon: Results of an Interlaboratory Study

May 26, 2023
Author(s)
Huong Giang Nguyen, Blaza Toman, Roger D. van Zee, Carsten Prinz, Matthias Thommes, Riaz Ahmad, David Kiska, Jamie Salinger, Ian Walton, Krista Walton, Darren Broom, Mike Benham, Humera Ansari, Ronny Pini, Camille Petit, Jurgen Adolphs, Andreas Schreiber, Toshihiro Shigeoka, Yuko Konishi, Kazuyuki Nakai, Matthias Henninger, Thomas Petrzik, Can Kececi, Vladimir Martis, Thomas Pasche, Enzo Mangano, Stefano Brandani

Determination of 24,25-dihydroxyvitamin D3 in Vitamin D External Quality Assessment Scheme samples using a reference measurement procedure

May 9, 2023
Author(s)
Stephen Wise, Grace Hahm, Carolyn Burdette, Susan Tai, Johanna Camara, Adam Kuszak, Emma Williams
Ninety archived human serum samples from the Vitamin D External Quality Assessment Scheme (DEQAS) were analyzed using a reference measurement procedure (RMP) based on isotope dilution liquid chromatography - tandem mass spectrometry (ID LC-MS/MS) for the

Phosphate-Functionalized MOF-808 for High Performance Li-S Batteries

May 8, 2023
Author(s)
Bingqian Liu, Avery Baumann, Megan Butala, V. Sara Thoi
Lithium–sulfur batteries are promising candidates for next-generation energy storage devices due to their outstanding theoretical energy density. However, they suffer from low sulfur utilization and poor cyclability, greatly limiting their practical

Size-exclusion chromatography

April 20, 2023
Author(s)
Andre Striegel
Over the past half-century, size-exclusion chromatography (SEC) has become the premier method by which to determine the molar mass (M) averages and the molar mass distribution (MMD) of natural and synthetic macromolecules. When coupled to a multiplicity of

Multivariate Flexible Framework with High Usable Hydrogen Capacity in a Reduced Pressure Swing Process

April 12, 2023
Author(s)
Arijit Halder, Ryan Klein, Sarah Shulda, Gavin McCarver, Philip Parilla, Hiroyasu Furukawa, Craig Brown, C. Michael McGuirk
Step-shaped adsorption¬–desorption of gaseous payloads by a flexible metal–organic framework can facilitate the delivery of large usable capaci-ties with significantly reduced energetic penalties. This is desirable for the storage, transport, and delivery

Salts as additives: A route to improve performance and stability of n-type organic electrochemical transistors

March 9, 2023
Author(s)
David Ohayon, Lucas Flagg, Andrea Giugni, Shofarul Wustoni, Ruipeng Li, Tania Hidalgo, Abdul Hamid Emwas, Rajendar Sheelamanthula, Iain McCulloch, Lee J. Richter, Sahika Inal
Organic electrochemical transistors (OECTs) are becoming increasingly ubiquitous in a wide variety of applications at the interface with biological systems, including biosensing, neuromorphic computing, and logic circuits. The widespread use of these

Resolving Complex Photoconductivity of Perovskite and Organic Semiconductor Films Using Phase-Sensitive Microwave Interferometry

March 2, 2023
Author(s)
Jasleen Bindra, Pragya Shrestha, Sebastian Engmann, Chad Cruz, Lea Nienhaus, Emily Bittle, Jason Campbell
Complex transient photoconductivity (Δσ) contains rich fingerprints of charge recombination dynamics in photoactive films. However, a direct measure of both real (Δσ′) and imaginary (Δσ″) components has proven difficult using conventional cavity-based time

Micelle formation and phase separation of poloxamer 188 and preservative molecules in aqueous solutions studied by small angle X-ray scattering

March 1, 2023
Author(s)
Rachel Ford, Peter H. Gilbert, Richard Gillilan, Qingqiu Huang, Roisin Donnelly, Ken Qian, David Allen, Norman Wagner, Yun Liu
Multi-injection pharmaceutical products such as insulin must be formulated to prevent aggregation and microbial contamination. Small-molecule preservatives and nonionic surfactants such as poloxamer 188 (P188) are thus often employed in protein drug
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