Carbon Nanotubes as Ultrahigh Quality Factor Mechanical Resonators
Carbon Nanotubes as Ultrahigh Quality Factor Mechanical Resonators
复制标题
DOI：
10.1021/nl900612h
复制
发表时间：
2009-07-01
期刊：
影响因子：
10.8
通讯作者：
van der Zant, Herre S. J.
中科院分区：
文献类型：
--
作者：
Huttel, Andreas K.;Steele, Gary A.;van der Zant, Herre S. J.
通过测量单电子隧穿电流，在毫开尔文温度下观察到了悬浮碳纳米管的横向振动模式。悬浮的纳米管由附近天线的射频电场无接触地驱动;在通过纳米管的时间平均电流中检测到机械共振。观察到由于纳米管的弯曲模式引起的尖锐的栅极可调谐谐振，将高达nu（0）= 350 MHz的谐振频率与Q = 10（5）以上的品质因数相结合，远高于先前报道的悬浮碳纳米管谐振器的结果。测得的Q因子的大小和温度依赖性显示出显着的协议与预测的固有阻尼悬浮碳纳米管。通过调节天线上的射频功率，我们发现纳米管谐振器可以很容易地被驱动到非线性区域。
We have observed the transversal vibration mode of suspended carbon nanotubes at millikelvin temperatures by measuring the single-electron tunneling current. The suspended nanotubes are actuated contact-free by the radio frequency electric field of a nearby antenna; the mechanical resonance is detected in the time-averaged current through the nanotube. Sharp, gate-tunable resonances due to the bending mode of the nanotube are observed, combining resonance frequencies of up to nu(0) = 350 MHz with quality factors above Q = 10(5), much higher than previously reported results on suspended carbon nanotube resonators. The measured magnitude and temperature dependence of the Q factor shows a remarkable agreement with the intrinsic damping predicted for a suspended carbon nanotube. By adjusting the radio frequency power on the antenna, we find that the nanotube resonator can easily be driven into the nonlinear regime.