Volume 19 Issue 3, March 2024

Directionality of nonlinear emission from a dielectric metasurface is controlled by fine-tuning the relative time delay and polarization of two pulsed pump beams.

Electrochemical carbon dioxide (CO₂) reduction in acid with a nano-structured tandem catalyst achieves high single-pass conversion efficiency and selectivity to useful C–C coupled products, bringing the process closer to commercial viability.

An aptamer-based nanobiosensor has been integrated into a wearable sweat sensor, allowing non-invasive tracking of the female reproductive hormone, oestradiol, with the potential to deliver sustainable solutions to female reproductive healthcare needs.

Organic and inorganic nanoparticles have different clearance mechanisms from the brain resulting in different biological fates and retention times.

Catalytic metals dissolved in liquid gallium remain atomically dispersed and dynamically active. The configurational dynamics of the metal atoms enables them to adopt a specific configurational alignment with the reactants to facilitate selective propylene synthesis from two different hydrocarbon feedstocks.

Using fluorinated elastomers in the fabrication of soft neural probes is shown to enhance spatiotemporal recording capability at single-neuron resolution within the central nervous system of rodents. Other soft encapsulation materials could be similarly engineered for high-resolution, long-lasting bioelectronics.

A DNA origami nanoturbine is designed as a rotary motor that draws power from an ion gradient or electrical potential across a solid-state nanopore. Single-molecule experiments demonstrate that the turbine can drive a DNA bundle into sustained unidirectional rotation, with the preferred rotation direction set by the chirality of the turbine.

This Review highlights the current understanding of mechanisms underlying the mechanical changes occurring in diseased and immune cells and discusses new approaches to leverage and target biomechanical cues for immune engineering at various length scales for therapeutic interventions.

The interference between two frequency-degenerate upconversion processes enables a metasurface-based, all-optical routing by controlling the phase delay between pump beams.

Catalytic metals dissolved in a liquid gallium solvent remain atomically dispersed. Alignments among the liquid atoms and reactants facilitate selective propylene synthesis from various hydrocarbon feedstocks.

The development of a tandem catalyst, consisting of two distinct nanoscale-engineered layers, enables efficient multicarbon production with high CO₂ utilization in an acidic CO₂ electroreduction environment.

Fluorinated elastomers as photoresists in the fabrication of soft neural probes are used to enhance the spatiotemporal recording capability at single-neuron resolution within the central nervous system of rodents.

A reagentless, wireless, wearable aptamer nanobiosensor interfaced with a gold nanoparticle-MXene-based electrode enables the selective, automatic and non-invasive analysis of the female hormone oestradiol in sweat during menstrual cycles with subpicomolar sensitivity.

A nanoscale DNA origami turbine is shown to perform mechanical rotation by directly harvesting transmembrane potential energy from an ion-concentration gradient across a solid-state nanopore. The direction of rotation is set by the designed chiral twist in the turbine’s blades.

Synthetic nanoparticles coated with cell membranes show immune evasion and circulate longer. Here, a genetically engineered cell membrane expressing a SpyCatcher anchor is used as a modular nanotherapeutic drug delivery platform for high-affinity targeting and suppression of ovarian cancer.

Using hydrogel nanovials to capture single mesenchymal stromal cells and their growth factor secretions, the authors link cell secretion to the transcriptome for thousands of cells, SEC-seq, enabling the study of secretion-associated cell states and mechanisms in therapeutic cell types.

Nebulized mRNA delivery has broad therapeutic potential but has proven challenging. Here, the authors report on a modified lipid nanoparticle with improved conditions to allow nebulization and demonstrate its application for delivering mRNA to the lungs.

Nanoparticle clearance is critical for safety and therapeutic applicability. Here the authors report the modulatory role of microglial extracellular vesicles on the brain clearance of organic and inorganic nanoparticles and provide a strategy to control their intracerebral fate.

The level of immune response in cancer vaccines can limit application. Here, an immune mobilization strategy, using bacteria-derived nanovesicles, enhances therapeutic outcomes of tumour vaccination by stimulating interleukin-1β secretion to elicit trained immunity with lineage shifts and epigenetic changes in myeloid progenitor pools.

Mechanistic origins of force stability and bond kinetics of interaction of the receptor-binding domain from the SARS-CoV-2 spike protein with angiotensin-converting enzyme 2, a key selection factor for mutations, are revealed at the single-molecule resolution using magnetic tweezers and molecular dynamics simulations.

Here the authors show that the trophi or jaws of the chitinous masticatory apparatus of marine and freshwater zooplankton rotifers can grind microplastics, independent of polymer composition, and generate particulate nanoplastics, which may accelerate the nanoplastic flux in global surface waters.