New 3D-printable cellulose hydrogel defies freezing temperatures for wearable sensors
Peer-Reviewed Publication
Updates every hour. Last Updated: 27-Oct-2026 19:16 ET (27-Oct-2026 23:16 GMT/UTC)
Researchers have developed a cellulose-based hydrogel sensor that maintains stable sensing performance in extreme cold using a zinc chloride and lithium bromide molten salt hydrate system, offering a sustainable and biodegradable platform for next-generation flexible wearable devices and human-machine interfaces. Published in Journal of Bioresources and Bioproducts, the study introduces a binary molten salt hydrate approach to dissolve natural cellulose efficiently within ten minutes. The resulting ionically conductive hydrogel achieves an impressive conductivity of 4.48 S/m and compressive strength of 2.48 MPa. Differential scanning calorimetry confirmed no water crystallization exothermic peaks from -80°C to 20°C, indicating exceptional anti-freezing capability. The material's shear-thinning properties further enable 3D printing of customized sensor geometries for human-machine interfaces.
Researchers from Beihang University, Truth Memory Corporation, Aix-Marseille University and Université Paris-Saclay has successfully transitioned the emerging physics concept of "orbitronics" from theoretical study to practical application in next-generation magnetic random-access memory (MRAM). By designing a highly efficient ruthenium-tungsten write electrode, the researchers demonstrated ultrafast writing of MRAM devices with a pulse of 28.7 ps, and solved critical industrial bottlenecks in MRAM yield and area penalty, paving the way for ultra-low-power memories.
Landau quantization is a cornerstone of quantum Hall effects. However, controlling Landau-level spacing and the spatial profiles of Landau modes through complex-valued gauge fields has remained largely unexplored. Now, a collaborative team from Beijing Institute of Technology, The Hong Kong University of Science and Technology, University of Exeter, and The University of Hong Kong, writing in Science Bulletin, demonstrates a mechanism for tuning Landau quantization. By constructing a real pseudo-magnetic field and an imaginary pseudo-electric field, the researchers enlarge the Landau-level spacing and enhance mode localization. These findings establish a versatile framework for tailoring non-Hermitian Landau levels and may advance applications in mode-selective filtering, field concentration, and wave-based sensing.
While light scattering is widely utilized in optical metrology and measurement, it has long been regarded as detrimental in laser-material processing. Scientist in China proposed an interferometric scattering-based optical tomoslicing technology (i-SOT), which overturns this conventional view and kerf widths as narrow as 7 nm under an industrial standard efficiency were achieved. This unprecedented axial resolution enables nearly lossless laser wafering from ingots——with transformative potential for manufacturing laser crystals, photovoltaics, and microelectronic chips.
A research team has found that replacing 15% of mineral nitrogen fertilizer with organic manure can accelerate soil nitrogen cycling while significantly reducing nitrous oxide (N₂O) emissions from tobacco fields.