A system and method for detecting mass based on a frequency differential of a resonating micromachined structure, such as a cantilever beam. A high aspect ratio cantilever beam is coated with an immobilized binding partner that couples to a predetermined cell or molecule. A first resonant frequency is...http://www.google.co.uk/patents/US7939273?utm_source=gb-gplus-sharePatent US7939273 - High sensitivity mechanical resonant sensor
