Preparing crystals held together with macromolecular bonds can create shape memory materials that can be engineered to exhibit a wide range of reversible changes useful for chemical sensing, optics and robotics. Seungkyu Lee , Heather A. Calcaterra & Chad A. Mirkin Article | 01 September 2022 ...
Chemistry is the scientific study of matter, its properties, and the changes it undergoes. Fundamentally, chemistry aims to understand how atoms, molecules, and compounds – the world’s building blocks – interact and transform. Chemistry is often termed the “central science”. It links physics,...
Lithium-rich oxygen-redox cathodes demonstrate high capacities, but lose energy density when cycled, showing cation disordering and formation of nanovoids and bulk molecular O2. These structural changes are shown to be a consequence of a kinetically viable and thermodynamically favoured local phase segr...
Students’ misconceptions about basic chemical ideas. This is an updated version of an extensive and carefully done report by Vanessa Barker for the Royal Society of Chemistry. Teachers and course designers can quickly find the material pertinent to a given topic, such as changes of state, stoichi...
Chemical engineering, the development of processes and the design and operation of plants in which materials undergo changes in their physical or chemical state. Applied throughout the process industries,... chemistry Chemistry, the science that deals with the properties, composition, and structure...
Here we systematically investi-gated the morphological, structural, and chemical changes of P2-NNMO during high-voltage cycling using a variety of characterization techniques. It was found that the lattice distortion and crystal-plane buckling induced by the P2-O2 phase transition slowed down the ...
In this work, we propose a pre-activation strategy driven by chemical impregnation to modulate the chemical state of surface lattice oxygen, thus regulating the structural and electrochem-ical properties of the cathodes. In-situ X-ray diffraction confirms that materials based on activated oxy-gen ...
and B will occur because the energy of the paired electrons after bonding is less than that of the two electrons in their atomic orbitals prior to bonding. The formation of a covalent bond is thus energetically favoured. The system goes from a state of higher energy to one of lower energy...
Unraveling the role of water in mechanism changes for economically viable catalytic plastic upcycling Catalytic hydrogenolysis and hydrocracking present a promising approach for upcycling polyolefin plastics. Here, the authors highlight the role of water in catalytic plastic upcycling, emphasizing that catalys...
The local polarization of light in nanophotonic waveguides changes with the light’s direction of propagation. By electrically controlling the polarization of optically created waveguide-coupled excitons in a two-dimensional semiconductor, researchers demonstrate voltage-controlled routing of photons in an int...