Nanomechanical hydrogen sensing

A nanomechanical beam resonator is used as a sensitive, specific hydrogen sensor. The beam is fabricated from AuPd alloy and tested by magnetomotive transduction at room temperature. The fundamental resonance frequency decreases significantly and reversibly at hydrogen pressures above 10−5Torr, whereas the frequency shifts observed for other gases are significantly smaller. The large frequency shift is likely due to the formation of interstitial hydrogen in the metal alloy lattice, which relieves the built-in tensile stress in the resonator beam. The uptake of hydrogen as measured by frequency shift is consistent with previous studies.

[1]  H. Craighead,et al.  Attogram detection using nanoelectromechanical oscillators , 2004 .

[2]  M. Roukes,et al.  Ultrasensitive nanoelectromechanical mass detection , 2004, cond-mat/0402528.

[3]  M. Roukes,et al.  Ultimate limits to inertial mass sensing based upon nanoelectromechanical systems , 2003, physics/0309075.

[4]  J. L. Davidson,et al.  A novel microelectronic gas sensor utilizing carbon nanotubes for hydrogen gas detection , 2003 .

[5]  Panos G. Datskos,et al.  Femtogram mass detection using photothermally actuated nanomechanical resonators , 2003 .

[6]  Craig A. Grimes,et al.  A Sentinel Sensor Network for Hydrogen Sensing , 2003 .

[7]  M. Roukes,et al.  Nanoelectromechanical systems: Nanodevice motion at microwave frequencies , 2003, Nature.

[8]  L. Sekaric,et al.  Operation of nanomechanical resonant structures in air , 2002 .

[9]  Michael L. Roukes,et al.  Balanced electronic detection of displacement in nanoelectromechanical systems , 2002 .

[10]  F. Favier,et al.  Hydrogen Sensors and Switches from Electrodeposited Palladium Mesowire Arrays , 2001, Science.

[11]  Thomas Thundat,et al.  Chemical sensing in Fourier space , 2000, Applied Physics Letters.

[12]  G. Kroes.  Six-dimensional quantum dynamics of dissociative chemisorption of H2 on metal surfaces , 1999 .

[13]  M. Roukes,et al.  A nanometre-scale mechanical electrometer , 1998, Nature.

[14]  Ray,et al.  Pressure-composition isotherms for nanocrystalline palladium hydride. , 1994, Physical review letters.

[15]  Ray,et al.  Pressure-composition isotherms for palladium hydride. , 1993, Physical review. B, Condensed matter.

[16]  A. Bokaian,et al.  Natural frequencies of beams under tensile axial loads , 1990 .

[17]  Y. Sakamoto,et al.  X-ray investigation of the absorption of hydrogen by several palladium and nickel solid solution alloys☆ , 1982 .