This ICNF 2011 paper by Sedlak, Sikula, Majzner, Vrnata, Vyslouzil, Fitl, Kopecky, and Handel examines noise in quartz crystal microbalance sensors. The research investigates various noise sources including adsorption-desorption noise, thermal noise, and 1/f noise in quartz crystal microbalance (QCM) devices used for mass sensing applications, analyzing how surface molecular binding events produce noise and how fundamental quantum 1/f noise limits detection sensitivity for chemical sensing, biosensing, and thin film deposition monitoring.