There's nanosensors out there that can detect very, very small amounts of materials.
“有的纳米传感器可以检测到极其少量的材料。
自考科目00012英语(一)
I am confident that I can be an effective member of your research team. I have a great interest in your current work on nanosensor development for monitoring biochemical processes. It would be an honor to work with you and your team.