Science, Nanotechnology, Nanosensors, Engineering, Nanofabrication.
https://www.technologyreview.com/s/411695/nanosensors-made-easy/ https://www.nasa.gov/ames-partnerships/technology/technology-opportunity-nanosensor-array-for-medical-diagnoses https://www.nasa.gov/home/hqnews/2007/jun/HQ_07140_Nanotech_Sensor_Test.html