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This work reports a quantitative investigation of the interaction parameter and miscibility of donor and acceptor organic molecules and their relationship with the fill factor and photovoltaic performance of bulk-heterojunction organic solar cells.
Reconfigurable electronic devices that can be shaped in two or more stable geometries modifying their functionalities have been realized by engineering the sequence in which the elastomeric substrates are mechanically buckled.
CsPbI3–xBrx solar cells, which undergo temperature- and moisture-driven reversible transitions between a non-perovskite transparent phase and a perovskite light-absorbing phase, are used as thermochromic photovoltaic devices integrated in windows.
Controlled widening of threading dislocations in SiGe layers epitaxially grown on Si allows the realization of resistive switching devices with enhanced uniformity, high on/off ratio and long retention times.
A perturbative method is proposed for the systematic design of mechanical metamaterials, where each element of the discrete model is associated with individual geometric features of the metamaterial, through the weak interaction between the unit cells.
Antiviral nanoparticle-formulated mimics of heparan sulfate proteoglycans were developed and shown to permit strong viral association as well as inhibition of a range of viruses on in vitro and in vivo models of infection.
Strategies to incorporate a lithium-cation source in lithium-ion capacitors have so far proved challenging. A sacrificial organic lithium salt is now shown to irreversibly provide lithium cations to a graphite electrode during the initial operando charging step without any negative effects.
Using a sol–gel process, monoliths of metal–organic frameworks were fabricated. With an enhanced methane volumetric uptake of 259 cm3 (STP) cm−3, and robust mechanical properties, this meets technological targets.
Isotope engineering in hexagonal boron nitride can affect its vibrational, electronic and optical properties due to the isotope substitution, as well as induce a change in the van der Waals interactions.
The Berezinskii–Kosterlitz–Thouless transition is observed in a 2D gas of exciton-polaritons, through measurements of the first-order coherence both in space and time.
Proceeding from quantum mechanical predictions, a high shear piezoelectric constant of 178 pm V−1 was measured for the amino acid crystal beta glycine. This originates from the efficient packing of the molecules of the amino acid.
Colloidal chiral springs and helices are formed by light inside a nematic liquid crystal suspension, predefining the mesoscopic superstructures self-assembled in such systems.
In situ transmission electron microscopy combined with theory modelling reveals that surface segregation in CuAu solid solution generates misfit dislocations, providing atomistic mechanisms of dislocation nucleation and dynamics at heterointerfaces.
Metallic stents have been widely used in coronary angioplasty. Here, the authors develop a resorbable self-expanding stent from polymeric elastomers with high mechanical strength for coronary applications.
The exchange bias effect in IrMn/FeCo is driven by a phase transition in the IrMn layer at room temperature, and occurs without the typical field-cooling sequence across the antiferromagnet Neel temperature.
An in-plane memory device based on multidomain BiFeO3 thin films is reported. Highly conductive domain walls appear only during the application of a read-out field, a non-destructive process that reduces accumulation of mobile defects on the walls.
Core/shell type-I semiconductor nanocrystals with compositionally graded shell and embedded in a current-focusing device architecture reach population inversion, a condition required for lasing, when excited with direct current.