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Ultrasensitive Mass Sensing with a Nanotube Electromechanical Resonator
Ist Teil von
Nano letters, 2008-11, Vol.8 (11), p.3735-3738
Ort / Verlag
Washington, DC: American Chemical Society
Erscheinungsjahr
2008
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Shrinking mechanical resonators to submicrometer dimensions (∼100 nm) has tremendously improved capabilities in sensing applications. In this Letter, we go further in size reduction using a 1 nm diameter carbon nanotube as a mechanical resonator for mass sensing. The performances, which are tested by measuring the mass of evaporated chromium atoms, are exceptional. The mass responsivity is measured to be 11 Hz·yg−1 and the mass resolution is 25 zg at room temperature (1 yg = 10−24 g and 1 zg = 10−21 g). By cooling the nanotube down to 5 K in a cryostat, the signal for the detection of mechanical vibrations is improved and corresponds to a resolution of 1.4 zg.