Memristors are two-terminal devices that display memory in the form of electrical resistance. Solution-processed memristors are arising as an attractive technology enabled by the versatility of solution-processed materials, but conscious analysis and demonstration of their performance and reliability are required to enable practical applications. The cover art depicts the opportunity presented by solution-processed methods to synthesize different materials (metal oxides, 2D materials, polymers) to build memristors for potential use in cryptography, data storage and artificial intelligence. See Pazos S et al.

Crystallization of soft materials often follows pathways not envisioned in classical theories of crystallization, instead passing through disordered, amorphous, or dense liquid precursors. The recent emergence of techniques to probe these pathways with minimal damage has led to a growing knowledge about these pathways. The image illustrates crystallization via a dense liquid precursor as the free energy of the system decreases, as well as the in-situ observation of this process. See Du J.S. et al

Microscale robots' unique active motion enables their precise navigation in different aqueous biological or environmental media. The image shows an artist’s impression of microrobots using photocatalysis to degrade chemical and biological warfare agents for environmental remediation. See Chen C. et al

Bioinspired electronics made of soft electrochemical matter based on organic mixed conductors can enable the integration of diverse forms of intelligence into everyday life. The cover image shows an artist’s impression of synapses communicating with an electronic device. See >Gkoupidenis P. et al

Broken symmetries at the nanoscale can greatly modify the emergent nanophotonic responses enabled by phonon polaritons, and lowering the degree of symmetry in natural and artificial materials gives rise to a wide spectrum of low-loss, directional, confined light–matter quasiparticles. The cover image shows an artist’s impression of extreme light confinement in low-symmetry crystals. See Galiffi E. et al.