Realizing biologically relevant plasticity rules in hardware is a central goal in neuromorphic computing. This work demonstrates that an individual vanadium dioxide device exhibits features analogous to behavioral timescale synaptic plasticity observed in CA1 neurons of freely moving mice. By positioning the device close to the phase‐transition boundary, the history‐dependent dynamics of these VO 2 devices were leveraged to induce long‐lasting, pulse‐driven changes in conductance. A direct comparison with whole‐cell recordings from CA1 neurons in freely moving mice reveals that VO 2 channels exhibit plasticity‐like state changes after a strong input, suggesting an analog to plasticity induction in the brain. These results highlight VO 2 as a material platform capable of reproducing key temporal features of biologically relevant plasticity, suggesting a path toward neuromorphic hardware that more faithfully mirrors the adaptive capabilities of neural circuits in mammalian brains.
Fabricating thin, fully dense oxide ceramic electrolytes without polymer binders remains a central manufacturing bottleneck for all‐solid‐state lithium batteries (ASSBs). Conventional pressing routes yield (LLZTO) pellets exceeding 500 m in thickness, and the 15 –30 wt.% polymer binders require deposit grain‐boundary carbon during sintering, suppressing ionic conductivity by 10% –40%. Here, we demonstrate binder‐free direct ink writing (DIW) of LLZTO using a ternary ‐terpineol/ethylene glycol/ceramic capillary suspension, in which trace ethylene glycol (2 vol.%) generates a percolating pendular‐bridge network that imparts a recoverable yield stress of Pa and Pa without any polymer. The optimized 65 vol.% (85.9 wt.%) LLZTO ink exhibits pronounced shear‐thinning behavior. Sintering at 1300/4 h yields 95.8% relative density at 254 m thickness with an intrinsic bulk ionic conductivity of 17.3 and a cycle‐median bulk value of 11.8 mS , consistent with the upper range of Ta‐stabilized cubic LLZO.
ABSTRACT Fabricating thin, fully dense oxide ceramic electrolytes without polymer binders remains a central manufacturing bottleneck for all‐solid‐state lithium batteries (ASSBs). Conventional pressing routes yield (LLZTO) pellets exceeding 500 m in thickness, and the 15 –30 wt.% polymer binders require deposit grain‐boundary carbon during sintering, suppressing ionic conductivity by 10% –40%. Here, we demonstrate binder‐free direct ink writing (DIW) of LLZTO using a ternary ‐terpineol/ethylene glycol/ceramic capillary suspension, in which trace ethylene glycol (2 vol.%) generates a percolating pendular‐bridge network that imparts a recoverable yield stress of Pa and Pa without any polymer. The optimized 65 vol.% (85.9 wt.%) LLZTO ink exhibits pronounced shear‐thinning behavior. Sintering at 1300/4 h yields 95.8% relative density at 254 m thickness with an intrinsic bulk ionic conductivity of 17.3 and a cycle‐median bulk value of 11.8 mS , consistent with the upper range of Ta‐stabilized cubic LLZO.
ABSTRACT Slippery liquid‐infused porous surfaces (SLIPS) have gained great attention as antifouling materials due to their outstanding properties, such as self‐repairing, self‐cleaning, and broad liquid‐ and microbe repellency. This material class relies on a nano‐ or microporous scaffold infused with an interlocked lubricating liquid. We developed a fluorine‐free, eco‐friendly, and biocompatible SLIPS series using macroporous PDMS substrates infused with medical‐grade liquid paraffin lubricants of five different viscosities: 68, 46, 32, 22, and 15 cSt. We systematically investigated the effect of substrate porosity and lubricant viscosity on the stability and durability of the system and its low‐fouling performance against the freshwater bacteria B. subtilis , E. coli , and P. fluorescens . Our results demonstrate the dominant character of substrate porosity in lubricant stabilization and the antifouling activity. For coarser, more corrugated substrates, the porosity was identified as a performance‐dominating property. In systems with a finer porosity, lower‐viscosity lubricants outperformed those with higher viscosities. The comparative overall analysis of the fouling data revealed that viscosities in the range of 15–32 cSt are best suited for antifouling SLIPS.
ABSTRACT Xylene is a hazardous volatile organic compound (VOC) widely present in industrial environments, and achieving sensitive and stable detection of xylene remains a significant challenge for gas sensors. Here, a one‐step hydrothermal route was employed to in situ grow p‐type Fe‐doped NiO nanosheet arrays on ceramic tubes for xylene detection. Remarkably, trace Fe‐doping (0.2%) NiO leads to a threefold enhancement in response to 100 ppm xylene, compared with pristine NiO. This improvement is attributed to the Fe 3+ ‐induced regulation of the Ni 3+ /Ni 2+ ratio and surface oxygen states, particularly the enrichment of reactive chemisorbed oxygen species. Structural and spectroscopic analyses reveal that Fe incorporation subtly modulates the local electronic environment of NiO without disrupting its crystal framework. The optimized Fe‐doped NiO sensor shows high selectivity toward xylene, a wide detection range (10–200 ppm), and excellent humidity resistance, demonstrating its potential for practical VOC monitoring. This work highlights that low‐level Fe doping can effectively tailor the surface electronic structure of strongly correlated p‐type oxides, offering a viable strategy for high‐performance gas sensors.
