Waste polyamide-derived CQDs show continuous photoluminescence tuning from 308 to 552 nm through sequential defect-state engineering, with optical transition energies decreasing from 4.32 to 2.50 eV. @Christian Ebere Enyoh from Saitama University Carbon quantum dots (CQDs) are fluorescent carbon nanomaterials with potential applications in sensing, optoelectronics, displays, anti-counterfeiting, and environmental technologies. Their optical properties can be adjusted by modif

The researchers used circularly polarized light at normal incidence and found that helicity-dependent photocurrents appeared perpendicular to the crystal’s polarization but vanished when measured parallel to it, supporting a bulk origin of CPGE. @Institute of Science Tokyo The circular photogalvanic effect (CPGE), a phenomenon that generates helicity-dependent photocurrents in noncentrosymmetric materials, can originate purely from a crystal's internal structure without contr

Summary of gold nanoparticle growth programming in liposome based on localization of biomineralization peptide The position of biomineralization peptides within liposomes can influence how gold nanoparticles grow, reports a research team from Institute of Science Tokyo. Peptides localized at the membrane interface promote branched structures, while those confined to the liposome interior favor spherical nanoparticles. The findings offer a new strategy for controlling nanoscal

The hierarchically structured membrane consists of three layers that enable the selective separation of ions using light and an electric field. A newly developed membrane makes it possible to selectively influence the permeability of ions using light and an electrical voltage. Lithium, magnesium, potassium and many other ions usually occur together in natural and technical solutions. Separating them from one another in a targeted manner is a challenge, for example, in the ext

This is the first time that three properties, being piezoelectric, photothermal and antioxidant, have been combined in a single organic structure measuring 500 nanometres. Credit: IIT-Istituto Italiano di Tecnologia They can be heated using infrared light, release antioxidant substances, and electrically stimulate cells when activated by ultrasound. These are the new nanoparticles designed and produced by a research group at the Italian Institute of Technology (IIT-Istituto I

The AtomDiT framework turns an atomic-resolution electron micrograph into an atomic-scale digital twin. It identifies dislocation types and positions, and simultaneously reconstructs stress and chemical fields, all from the same local atomic environment descriptors. Credit: ©Science China Press Dislocations are the primary carriers of plastic deformation in metallic materials. They directly determine how metals respond to mechanical loading, giving them the ability to deform,

Short peptide sequences can self-assemble into molecular fibers through a series of steps. © Stefan Schuhmacher / MPI-P Tiny molecules, known as peptides, can assemble into honeycomb-like fibers filled with water. The blueprint for these fibers lies in a very short amino acid sequence, as researchers from the Max Planck Institute for Polymer Research, the University of Ulm, and Ulm University Hospital have now demonstrated. The blueprints provide rules for building ordered ma

Liz McCue | University Communication and Marketing A Husker research team’s latest milestone could open the door to broader use of a class of materials whose electrical properties may someday power next-generation electronics, high-density energy storage, improved computer memory and new strategies for cooling. In a new paper published in Science, University of Nebraska–Lincoln physicists Xiaoshan Xu, Alexei Gruverman and Evgeny Tsymbal demonstrated that hafnium oxide — a tou

Schematic illustration of Ta 2 NiSe 5 with its quasi-1D chain structure and coupling to electronic instabilities Zhang et al. demonstrate that the debated 326-K phase transition in Ta2NiSe5 involves a collaboration of three microscopic factors The excitonic insulator is a macroscopic condensate of electron-hole pairs, i.e., excitons, predicted to emerge in a narrow-gap semiconductor or semimetal. Despite apparent analogies to a superconductor, which is a macroscopic condensat

Design and synthesis of lattice-matched and mismatched 2DP vdW heterostructures with sharp interfaces. In a recent study published in Nature, an international team of researchers reports, for the first time, lattice-defined 2D vdW heterostructures for organic 2D crystals at near-zero twist. On-water surface synthesis enables sequential assembly of chemically distinct 2D polymers to be stacked with defined lattice registry, while introducing a new lattice-control knob through

Researchers have shown that tiny wrinkles in graphene can change the material’s electrical properties. By harnessing this characteristic, scientists may one day control electricity in atomically thin materials — such as graphene — by changing their shape instead of adding new chemicals or materials, potentially powering more responsive sensors and ultrathin electronic devices. Credit: Mario Norton/Rice University. All Rights Reserved. Tiny wrinkles could reveal new behaviors

Scientists have shown that a material treated for 40 years as a uniform, textbook superconductor is in fact a patchwork of different crystal structures throughout its bulk, using one of the latest 3D imaging techniques to see deep inside the crystal for the first time. High-temperature superconductivity is widely regarded as one of the most significant scientific discoveries of the past 40 years. It promises technologies built on electricity that flows with zero resistance an