Secondary ion mass spectrometry reveals atoms that make up MXenes and their precursor materials

A new technique using secondary-ion mass spectrometry has given Drexel researchers a fresh look at the two-dimensional materials they have been studying for more than a decade. Credit: Drexel University Since the initial discovery of what has become a rapidly growing family of two-dimensional layered materials—called MXenes—in 2011, Drexel University researchers have made steady progress … Read more

Lab grows macroscale, modular materials from bacteria

Rice University bioscientists have turned bacteria into self-assembling building blocks. The macroscale, slime-like engineered living materials they form could be used to soak up environmental contaminants or as custom catalysts. Credit: Jeff Fitlow/Rice University Engineered living materials promise to aid efforts in human health, energy and environmental remediation. Now they can be built big and … Read more

Researchers attempt to print thin-film transistors with metal oxides onto heat-sensitive materials

Flexible: Electronic circuits on a film of polyimide from the Empa laboratory form synaptic transistors. Credit: Empa Within the Functional Oxides Printed on Polymers and Paper (FOXIP) project, researchers form Empa, EPFL and the Paul Scherrer Institute attempted to print thin-film transistors with metal oxides onto heat-sensitive materials such as paper or PET. The goal … Read more

When curved materials flatten, simple geometry can predict the wrinkle patterns that emerge

Nature Communications (2017). DOI: 10.1038/ncomms15809″ width=”800″ height=”530″/> Domain size scaling. Typical equilibrium wrinkle patterns in a hexagonal section of a thin spherical shell on a liquid substrate. All simulation parameters are kept fixed, except for the sheet thickness. The Föppl–von Kármán number γ of the system is indicated above each pattern. While the top-left pattern … Read more

Mimicking termites to generate new materials

A termite mound seen in Gaborone Game Reserve in Botswana. Termites are known to build mounds as tall as 30 feet. Credit: Oratile Leipego Inspired by the way termites build their nests, researchers at Caltech have developed a framework to design new materials that mimic the fundamental rules hidden in nature’s growth patterns. The researchers … Read more

Researchers reveal the origin of ultrafast mystery signals in valleytronic materials

By exciting the transitional metal dichalcogenide monolayers—atomically thin semiconductors—with ultrashort pump pulses, atoms can coherently vibrate and modulate optical responses. The probe pulses can detect the ultrafast modulation that shows peculiar high-frequency overtones of K-point acoustic phonons. Credit: Yokohama National University Tiny materials hold big mysteries, the solutions to which could bring about next-generation electronics. … Read more

Study sheds new light on materials assembly in confinement

Researchers from Cornell used computer simulations to show how the assembly of vertex-truncated tetrahedra is affected when confined inside a spherical container. The findings offer materials scientists a new method for controlling the assembly structure and characteristics of the resulting material. Credit: Rachael Skye Cramming multiple pairs of shoes into a vacation suitcase, twisting and … Read more

Exposed! International Space Station tests organisms, materials in space

EXPOSE-R2 flight hardware with dried cells of Chroococciopsis sp. 029 mixed with Martian regolith analog to simulate Mars-like conditions for the BIOMEX experiment on response of melanin-containing fungi to space. After exposure, the cells were returned to Earth and rehydrated for DNA sequencing. Credit: Roscosmos/ESA Space may look empty, but it contains extreme temperatures, high … Read more

Complex coacervate droplets as a model material for studying the electrodynamic response of biological materials

Alamgir Karim, Dow Chair and Welch Foundation Professor of Chemical and Biomolecular Engineering, led the research team. Credit: University of Houston Manipulating solid particles of a few micrometers in size using an electric field has been of great interest to physicists. These controllable particles can be assembled into dynamic chains that can effectively control the … Read more