Hembacher, Stefan and Giessibl, Franz J. and Mannhart, Jochen (2002) Evaluation of a force sensor based on a quartz tuning fork for operation at low temperatures and ultrahigh vacuum. Applied Surface Science 188 (3-4), pp. 445-449.
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The noise performance of the force sensor is crucial for optimizing the resolution in non-contact atomic force microscopy. Sensing forces in vacuum and low temperatures is even more demanding than at ambient conditions. Here we analyze the noise performance and the sensitivity of a force sensor based on a quartz tuning fork of which one of the prongs is fixed (qPlus sensor). The noise characteristic of the qPlus sensor, optical and piezoresistive detection schemes at room temperature are compared and the qPlus sensor is investigated at low temperatures. The frequency variation of quartz tuning forks as a function of temperature is experimentally determined for the temperature range from 4 to 300 K.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl|
|Keywords:||Non-contact AFM; Low temperatures; qPlus sensor|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||13 Jul 2012 10:19|
|Last Modified:||13 Jul 2012 10:19|
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