Characterization

Improving production of GaN-based LEDs: Metalens takes ‘exceptional clear’ images of patterned sapphire substrate

By Lisa McDonald / July 23, 2021

Gallium nitride-based blue LEDs are typically grown on patterned sapphire substrates that are imaged using SEM and optical microscope systems to ensure the substrate has the correct structure. Researchers in Taiwan developed a new gallium nitride-based metalens that improves the clarity of substrate images.

Read More

A nontri‘vial’ matter—researchers find glass containers may degrade certain biomolecules

By Lisa McDonald / July 13, 2021

Many chemicals are stored in glass containers due to the assumed chemical durability of glass. Purdue University researchers found that glass surfaces can cause some biomolecules to degrade, however—leading them to recommend that these chemicals not be stored in glass containers.

Read More

The power of good vibrations: Material and process developments for piezoelectric energy harvesting

By Jonathon Foreman / June 25, 2021

The field of piezoelectric energy harvesting looks to convert mechanical motion, notably from vibration sources, directly into electricity. Recent papers in several ACerS journals discuss challenges and research into developing both materials and processes for PEH.

Read More

Cathodes for Li-ion batteries—researchers explore complex defect structure of LiFePO4

By Lisa McDonald / June 11, 2021

Lithium iron phosphate is a widely used cobalt-free cathode material for lithium-ion batteries. It is known to experience certain kinds of defects in its crystal structure, however, and a recent study led by researchers at the Skolkovo Institute of Science and Technology explores the existence of hydroxyl groups in phosphorus vacancies.

Read More

Lining up for better performance: Researchers tailor interfaces in solid-state batteries

By Lisa McDonald / June 4, 2021

One of the main challenges to commercializing solid-state batteries is stabilizing the interface between the solid electrolyte and electrodes. In a recent paper, researchers from the University of Illinois Urbana–Champaign and Xerion Advanced Battery Corporation look at the role interface morphology and crystallography play in solid-state battery performance.

Read More

Rare borate structural unit appears to enhance functionality of nonlinear optical materials

By Lisa McDonald / May 28, 2021

Current borate-based nonlinear optical materials are reaching the limits of their functionality based on the structural configuration of the borate. A team led by researchers in China and the United States explored arranging borate in the linear BO2 configuration to enhance functionality.

Read More

Determine oxidation stability of materials at MAX speed

By Lisa McDonald / April 23, 2021

Determining oxidation stability of new MAX phases is a difficult and expensive process with current computational and experimental methods. Researchers at Texas A&M University designed a new machine-learning-based scheme for predicting the oxidation of MAX phases at high temperatures, allowing them to conduct studies that may otherwise take years to perform.

Read More

MAX radiation protection for next-generation nuclear power plants

By Jonathon Foreman / April 20, 2021

MAX phases are layered ceramic materials with both ceramic and metal-like properties, as well as good radiation tolerance, making them ideal candidates for use in next-generation nuclear power technologies. Two recent papers investigate the irradiation of Cr2AlC to determine its potential for this application.

Read More

Designing optimum biomaterials: Researchers explore relationship among structure, proteins, and cell attachment

By Lisa McDonald / April 16, 2021

In implants and scaffolds containing bioactive glass, the relationship between device structure and biological performance is complicated by the formation of a highly complex interfacial layer. In two papers, Lehigh University researchers begin to untangle the interaction among structure, protein adsorption, and cell attachment.

Read More

Researchers confirm existence of unique nonlinear optical response in nanocrystal-in-glass composites

By Lisa McDonald / April 6, 2021

Second-harmonic generation is a nonlinear optical process that allows for the creation of low-power and compact light sources. Researchers in China discovered nanocrystal-in-glass composites exhibit a similar but different phenomenon called transverse second-harmonic generation that would allow for the creation of light sources with expanded capabilities.

Read More