Kyoto Univ: Diamond quantum sensor, High sensitivity: In-vehicle sensor, used for cancer cell detection
2019/9/2 05:00
Institute for Chemical Research, Kyoto University: Professor Kenkazu Mizuochi
National Institute of Advanced Industrial Science and Technology (AIST)
We have developed a quantum sensor with high sensitivity to magnetic fields by adding phosphorus to artificially synthesized diamond.
high sensitivity is achieved by superimposing the movement of electrons in the sensor (necessary to achieve high sensitivity).
It records 2.4 milliseconds, which is more than five times that of the previous model.
Application fields:
It can be widely applied to in-vehicle sensors, cancer cell detection by temperature measurement, and brain and heart measurement.
Expected to be put into practical use within 10 years.
Artificial diamond sensor: “NV center” electron movement observed
The artificial diamond sensor observes the movement of electrons in the NV center (nitrogen atoms and cavities are arranged) instead of carbon atoms in the crystal structure.
Traditionally, impurities in diamonds were thought to reduce sensitivity due to noise.
However, phosphorus was added this time, giving priority to stabilizing the electronic state.
It turns out that with the “appropriate phosphorus concentration”, the superposition time of the movement of electrons is greatly extended.
If impurities other than phosphorus are removed, the record can be extended further.
Kyoto University, etc. | Science & Technology News | Nikkan Kogyo Shimbun
https://www.nikkan.co.jp/articles/view/00529398
World’s highest sensitivity achieved with a single NV diamond quantum sensor
-World’s longest T2 at room temperature with synthetic n-type diamond-
This research result was published in the online version of the international journal “Nature Communications” on August 28, 2019.
http://www.kyoto-u.ac.jp/en/research/research_results/2019/190828_1.html