Diamond quantum sensors can overcome many of these challenges. However, one catch is that the diamond crystals used for these sensors are usually minute, measuring only a few millimeters wide. The limitation posed by their size—which stems from difficulties in manufacturing larger diamond substrates—restricts how these sensors can be used in different industries.
In a bid to address the problem, Japanese researchers from the Institute of Science Tokyo (ISCT) have created a large-area diamond substrate with nitrogen vacancy (NV) centers on a non-diamond substrate. This setup works like the perfect platform for highly-sensitive diamond quantum sensors for EV batteries.