NEMS Resonant Mass Sensor Simulator

This simulator visualizes a nanoelectromechanical systems (NEMS) resonant mass sensor — a suspended nanoscale cantilever driven to vibrate at its natural resonant frequency. As individual particles land on the beam, its total mass increases very slightly, lowering the resonant frequency in a way that can be tracked with extreme precision. Watch the cantilever oscillate in 3D, see particles adsorb onto its surface, and follow the live frequency-vs-time chart as each landing produces a small, discrete downward step — the same signature real NEMS sensors use to detect and weigh individual viruses and molecules. Adjust the particle mass and landing rate to see how they shape the detection signal.