High-frequency metallic-CNT nanolaminate micromechanical resonators are described by JH Bak, YD Kim, SS Hong et al. in a Nature Materials letter article [Nat. Mater. doi:10.1038/nmat2181].
From dynamic and quasi-static flexural measurements, addition of CNT lamina to Al thin-films results: (1) near doubling of Young’s modulus; (2) considerable increased strengths; (3) retardation of nonlinearity onset. As resonant frequencies are related to elastic moduli, high conductance, high reflectance, high-frequency micromechanical resonators can now be realized with operational frequencies comparable to SiC and AlN resonators of same size. Such resonators can be applied for ultra-sensitive sensors: from biomolecular recognition to zero-point displacement measurements.