Heteroepitaxial growth technology has made it possible to create larger diamond substrates, opening new opportunities for industrial-scale production of diamond quantum sensors. A research team led by Institute of Science Tokyo in collaboration with Shin-Etsu Chemical Co., Ltd. and the National Institute of Advanced Industrial Science and Technology, successfully fabricated large-area (111)-orientated diamond crystal substrates on heterogeneous (non-diamond) substrates, demonstrating the potential for industrialization of precise, noise-resistant current measurements for electric vehicle battery monitoring.

Gas sensors are essential for personal safety and environmental monitoring, but traditional sensors have limitations in sensitivity and energy efficiency. Now, researchers from Japan have developed an improved gas-sensing technology by treating graphene sheets with plasma under different conditions, creating structural and chemical defects that enhance ammonia detection. These functionalized graphene sheets exhibited superior sensing performance compared to pristine graphene, potentially paving the way for wearable gas detection devices for everyday use.

Modern aircraft require compact, low-profile antennas to minimize radar detection and maintain aerodynamic efficiency, but current designs often cover only narrow frequency ranges. Now, researchers from China have developed a new ultra-wideband, omnidirectional circular ring antenna with a height of just 0.047 times the low-frequency wavelength and a width of 0.19 times the wavelength, achieving an impedance bandwidth of 12:1, fulfilling the performance requirements for multifunctional airborne antennas.