Search

Detecting dilute airborne biomarkers is important in healthcare but is limited by the low sensitivity of current gas sensors. A portable, low-cost device is introduced that uses water condensation to enrich airborne biomarkers into a concentrated liquid, enabling existing liquid sensors to detect biomarkers with high sensitivity and broad accessibility.

Harnessing the resolving power of space very long baseline interferometry results in a link between 22 GHz H₂O MegaMaser emission and accretion activity in the thin disc around the nucleus of galaxy NGC 4258. The emission regions appear consistent with a periodic magneto-rotational instability in the disc.

In order to predict the behaviours of self-propelled particles it is important to understand the fluid disturbances they generate. Here the authors measure the flow-fields around active particles and show that they are in agreement with theoretical predictions which take into account electrokinetic effects.

The effect of surrounding fluids on the coalescence of liquid drops is expected to be non-negligible, but a full understanding is still missing. Paulsen et al.address the two-fluid coalescence problem and find that the early dynamics is independent of the surrounding fluid over a wide range of conditions.

The two frequency-modulated superconducting qubits act as a trembling mirror for microwave photons with on-demand tunable directionality.

The performance of devices based on fully non-fused ring electron acceptors has been limited due to the low acceptor crystallinity. Here, authors report these acceptors with peripheral substituents that guarantee the planarity of the skeleton, achieving efficiency of 18.04% in organic solar cells.

Designing monovalent anion-selective membranes is challenging due to the need to balance trade-offs between flux and selectivity, membrane stability, and cost-effective fabrication. Here, the authors synthesized a polymer via superacid polymerization and designed a membrane using in-situ interfacial polymerization to optimize membrane properties.

Turbulence modelling is an essential flow simulation tool, but is typically dependent on physical insight and engineering intuition. Novati et al. develop a multi-agent reinforcement learning approach for learning turbulence models that can generalize across grid sizes and flow conditions.

The combination of distributed Rayleigh back-scatter and Raman gain in an optical fibre yields an open cavity, mirror-less fibre laser that offers stable operation at the telecommunications wavelength of 1.5 µm.

The molecular system regulating cell surface mechanics remains largely unexplored at single-cell resolution. Here, the authors report a high-throughput single-cell assay, ELASTomics, which integrates mechanical phenotyping with unbiased transcriptomics.

Quasi-periodic oscillations from black holes (BHs) in flux have been reported in radio, optical, X-ray and gamma-ray bands, but there hasn’t been any report of quasi-periodic variations in polarization yet. Here, the authors show detection of GHz-band radio polarization oscillations from fast-rotating BH X-ray binary GRS 1915+105

The authors present 19 detections of coherent low-frequency radio emission from M dwarfs using the Low Frequency Array. The sample includes both chromospherically active and quiescent stars, but radio luminosities are independent of coronal and chromospheric activity indicators.

Intrinsically disordered FG-Nups line the Nuclear Pore Complex (NPC) lumen and form a selective barrier where transport of most proteins is inhibited, whereas specific transporter proteins are able to pass. Here, the authors reconstitute the selective behaviour of the NPC by introducing a rationally designed artificial FG-Nup that demonstrates that no specific spacer sequence nor a spatial segregation of different FG-motif types are needed to create selective NPCs.

Polarimetry provides information about physical characteristics of cometary dust. Here, the authors show that the polarization of interstellar comet 2I/Borisov exceeds the typical values for comets, and this together with its polarimetrically homogenous coma suggests a more pristine nature of the object.

Nanostencil etching and lithography enable the fabrication of green-emitting nanoscale organic light-emitting diode pixels with size as small as 100 nm, densities as high as 100,000 pixels per inch and average external quantum efficiency of 13.1% for green emission.

Efficient small-scale fluid capture and transport is essential for point-of-care diagnostics but faces trade-offs between speed, volume, and flow resistance. Inspired by hummingbirds, the proposed elastocapillary device enables rapid, passive fluid capture and aliquoting, combining capillarity and elasticity for optimal performance.

Active flows in biological systems swirl. A coupling between active flows, elongated deformations and defect dynamics helps preserve self-organised structures against disordered swirling.

Non-classically correlated pairs of single photons and phonons are generated and read out from a nanomechanical resonator, demonstrating that such resonators could be used for light–matter quantum interfaces.

Two ‘outrigger’ telescopes were added to CHIME, leading to the localization at detection of FRB 20210603A. The burst originated from deep within the star-forming disk of its host galaxy.

Microtubule asters are positioned precisely within cells by forces generated by molecular motors, but it is unclear how these are integrated in space and time. Here the authors perform in vivo drag measurements and genetic manipulations to determine the balance of forces that position microtubule asters in C. elegans zygotes.

Polarization measurements are reported for the blazar Mk501, revealing a degree of X-ray polarization that is more than twice the optical value and supporting the shock-accelerated energy-stratified electron population scenario.

Quantum control of an optically levitated nanoparticle with a mass of just one femtogram is demonstrated in a cryogenic environment by feedback-cooling the motion of the particle to the quantum ground state.

Structured light is shown to be robust against unitary perturbations.

Shadow tomography is efficient for quantum state characterization. Here, the authors implement shadow tomography on photonic states with a single metasurface, which alleviates the complexity in measurement

Most current cell sorting methods are based on fluorescence detection with no imaging capability. Here the authors generate and use Raman image-activated cell sorting with a throughput of around 100 events per second, providing molecular images with no need for labeling.

Water vibrational motion, which occurs on the few-femtosecond timescale and underpins energy transfer within the hydrogen bonding network, has remained challenging to observe in real time due to constraints in time resolution. Here, the authors investigate the ground state vibrational dynamics of liquid water using a sub-5 fs near-infrared pump pulse and few-fs ultraviolet probe pulses, observing rapid dephasing of the OH stretch mode that precedes its relaxation via coupling to the bend modes.

The classical description of viscous turbulent flows is based on a formulation of Navier-Stokes equations which assumes its solutions to remain smooth at all times. Saw et al. characterize velocity fields in experimental turbulent flows at dissipative scale, and link the results to the singularities.

ILT J1101 is a white dwarf–M dwarf binary that emits minute-duration radio pulses with a 2-h periodicity. The period of the radio pulses is linked to the orbital period of the binary, rather than the rotation period of the stellar components.

Electrogenerated gas bubbles impair the efficiency of electrolysis and require a deeper insight into their dynamics. Here, the authors describe a transport mechanism in which electrolyte droplets from the coalescence of microbubbles are sprayed into H₂ bubbles.

X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite reveal a global toroidal magnetic field with large variations in local polarization, suggesting a more complex turbulence distribution than anticipated.

Morkovin’s hypothesis establishes a comparison between incompressible and compressible flows and is essential for understanding supersonic and hypersonic turbulence. In this work, the authors present the measurements of wall-normal fluctuations that support the hypothesis proposed in 1962.

Coherent radio emission with a long (nearly 6.5 h) period has been detected from both magnetic poles of a rotating compact object, offering insights into the evolution and emission mechanism of compact radio transients.

Difficulties in experimentally achieving simultaneous structural sensitivity and time resolution have hindered the real-time mapping of the vibrational energy relaxation pathways in biomacromolecules. Now, using ultrashort light pulses to locally deposit excess energy in a protein-bound haem, the temporal evolution of the subsequent energy flow has been monitored, unravelling vibrational couplings that lead to mode-specific temperature changes.

Buttar et al. explore a contactless method for screening five respiratory diseases using 6G Integrated Sensing And Communication Orthogonal Frequency Division Multiplexing (ISAC OFDM) signals from software-defined radios. Using deep learning, the approach enables accurate, real-time screening for Asthma, Chronic Obstructive Pulmonary Disease, Interstitial Lung Disease, Pneumonia and Tuberculosis.

The authors demonstrate that high-precision birefringence detection at the 10⁻¹¹ level can be achieved using spin-orbit-coupled Rabi oscillations in a photonic two-level system. The presented detection technique benefits a broad range of applications involving optical birefringence such as precise control of the entangled photonic states.

Here, the authors report large photothermal nonlinearity mediated by anapole states within subwavelength Si nanodisks, offering a mechanism for dynamic tuning of far-field radiation from multipolar modes. Nonlinear scattering is used to demonstrate the potential for far-field optical localization of Si nanostructures.

The role of peroxisomes in skeletal muscle remains largely unexplored. Here, the authors show that peroxisomal dysfunction and disrupted crosstalk with mitochondria drive age-related muscle decline, underscoring the need to preserve peroxisomes for muscle health.

Entacapone, a Parkinson’s disease medication, sequesters iron resulting in a selective inhibition of gut microbial activity.

Microorganisms navigate complex fluid environments, impacting medical and industrial applications. Here, the authors use Lattice Boltzmann simulations to reveal how flexible polymers dramatically enhance rotational motion and reduce propulsion in squirmers, examining the role of inertial and viscous forces impacting the motion of squirmers in complex environments.

Remote quantum entanglement is demonstrated in a micromachined solid-state system comprising two optomechanical oscillators across two chips physically separated by 20 cm and with an optical separation of around 70 m.

Here Plikus and colleagues provide a step-by-step protocol for the isolation and characterization of lipocartilage from mouse ear and the purification of its lipochondrocytes.