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Graphene is a two-dimensional material consisting of a single layer of carbon atoms arranged in a honeycomb structure. Its properties include high strength and good conductivity of heat and electricity. The stacked form of graphene is graphite.
Rotational symmetry is shown to protect the quadratic dispersion of out-of-plane flexural vibrations in graphene and other two-dimensional materials against phonon–phonon interactions, making the bending rigidity of these materials non-divergent. The quadratic dispersion is then consistent with the propagation of sound in the graphene plane.
Assessment of surface contamination shows that trace oxygen is a key factor influencing the trajectory and quality of graphene grown by low-pressure chemical vapour deposition, with oxygen-free synthesis showing increased reproducibility and quality.
The electrical properties of nanostructured networks are often dominated by junctions between the particles. Here, Gabett et al. develop transport models and utilise impedance spectroscopy to quantify the factors limiting conduction in these systems.
Two-dimensional graphene-based membranes have gained much interest, but they suffer from poor rejection for monovalent salts. Here, the authors develop an electrostatic-induced ion partitioning strategy to suppress anion-cation transmembrane co-transport, improving the desalination performance.
Millirobots effective application generally depends on cost, scalability, efficient locomotion, and the ability to track target trajectory precisely. Here, authors demonstrate promising graphene-based helical millirobots by introducing asymmetric light pattern distortion to a laser-induced graphene process.
Rotational symmetry is shown to protect the quadratic dispersion of out-of-plane flexural vibrations in graphene and other two-dimensional materials against phonon–phonon interactions, making the bending rigidity of these materials non-divergent. The quadratic dispersion is then consistent with the propagation of sound in the graphene plane.
By transferring laser-induced graphene to a hydrogel film at cryogenic temperatures, stretchable graphene–hydrogel interfaces can be created for application in wearable and implantable electronics.
A large-angle twist between two bilayer graphene films makes a sensitive and broadband infrared–terahertz detector as a result of interlayer screening and a crystal field-induced bandgap.
A living catalyst transfer polymerization enables access to low dispersity polyphenylenes and ultimately to length-selective synthesis of graphene nanoribbons.