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Spin qubits are attractive for scalable quantum information, but integrating different classes of two-qubit logic has remained elusive. Here, the SWAP, CPHASE, and CNOT-class two-qubit gates are implemented in a silicon device operating even at temperatures above 1 K.
Hydrogels are promising for tissue engineering, in particular for replacing the extracellular matrix. Here, an extracellular matrix inspired hydrogel is created from hyaluronan and gelatin, which cell culture and animal experiments shows to be biocompatible and biodegradable.
Preventing the condensation of water is key for anti-icing applications. Here, a macro-ridged surface is found to prevent frost formation either side of each ridge, attributed to a change in water vapor distribution preventing ice bridge formation.
Contact electrification can generate useable charge on a variety of surfaces. Here, surface charge creation when a single water droplet hits various plant leaves is investigated, including the effect of droplet characteristics and whether the plant leaf is hydrophilic or hydrophobic.
Collagen is known to play a key role in the fracture resistance of bone. Here, in situ synchrotron tomography during the mechanical testing of bone is combined with deep learning to mitigate radiation damage, revealing that a compromised collagen network lowers the efficacy of crack deflection.
The contamination of water with lead from damaged perovskite solar cells is a key concern. Here, a spherical hydroxyapatite nanoparticle scaffold absorbs lead from a damaged device, keeping lead concentration in water below safe drinking limits.
A near-infrared to visible photon upconversion device was previously shown to increase external quantum efficiency by up to 2.3%. Here, the upconversion mechanism is studied by time-resolved spectroscopy, revealing that 67% of incident photons are utilized.
Superhydrophobic behavior of liquid droplets on a surface typically results from chemical and surface topography considerations. Here, contact angles approaching 180° are observed for condensation-induced droplets on suspended monolayer graphene.
Active metamaterials can host non-Hermitian interactions that defy the conservation laws of linear elasticity, leading to unusual phenomena such as one-way energy transmission and odd-elastic moduli. Here, robust unidirectional Rayleigh surface waves are found in active media comprising both gyroscopic and odd-elastic effects.
In data-driven approaches for materials discovery, it is essential to account for phase stability when predicting synthesizability. Here, by combining density functional theory calculations and machine learning, the authors predict the synthesizability of unreported half-Heusler compositions.
Fracture during fatigue loading is known to occur in materials for small strains, below the yield strain. Here, coarse-grain simulations of a model amorphous material reveals that the onset strain at which irreversible deformation occurs is the same for fatigue as it is for monotonic loading.
Short-wavelength lasers based on wide-bandgap GaN photonic crystals are promising for high-brightness illumination and materials processing. Here, the authors develop a nano-fabrication method for GaN/air photonic crystals, achieving high lasing operation performance in terms of output power, beam quality, and low threshold current.
Germanium-based oxides are wide bandgap semiconductors with the prospects of ambipolar doping. Here, a hybrid molecular beam epitaxy is demonstrated for the growth of both rutile Sn1-xGexO2 and perovskite SrSn1-xGexO3 films.
Humidity can change the properties of halide perovskites used in functional devices. Here, indentation experiments reveal that humidity causes an increase in elastic modulus and a decrease in hardness, which is correlated to bond length, hydrogen bonding and polarizability of the ions.
Achieving photodetectors with a wide spectral range and rapid response remains challenging. Here, Sb2Te3 nanosheets are used to construct a photodetector that covers visible to millimeter wavelengths, with a fast response time of 900 ns.
Short-range chemical ordering has emerged as a key feature for controlling the properties of high-entropy alloys. Here, ab initio calculations reveal that two types of short-range ordering exist in Si–Ge–Sn medium-entropy alloys, suggesting that multiple types of ordering could exist in a single alloy.
Topological mechanical metamaterials have been considered effective for energy manipulation via edge states, but manipulating these states remains challenging. Here, a Kresling origami mechanical metamaterial hosts multiple topological edge states at finite frequencies, which can be manipulated and transferred across the boundaries of the system by adjusting the lattice torsion.
Ionic selectivity in microfluidics is challenging due to the differing length scales between ions and channels. Here, a model system emulates ionic transport at the microscale with electrokinetic spherical Janus micromotors moving over surfaces with spatially varying charge.
Scanning tunneling microscopy is a powerful tool for determining the electronic structure of surface adsorbates. Here, carbon monoxide functionalized tips enable more accurate probing of the molecular states of graphene nanorings adsorbed on a gold surface.
Reconfigurable and tunable terahertz electronic devices are promising for various technological applications, for which metamaterials are receiving interest. Here, a graphene/gold bilayer metasurface enables the creation of a frequency-selective absorber with electrical tuning in the 0.1–1 THz range.