TY - JOUR
T1 - Microfabricated torsion levers optimized for low force and high-frequency operation in fluids
AU - Beyder, Arthur
AU - Sachs, Frederick
N1 - Funding Information:
Microfabrication was done at the Cornell NanoScale Facility, Ithaca, New York. This work was supported by NIH R01 GM060648.
PY - 2006/6
Y1 - 2006/6
N2 - We developed a mass production fabrication process for making symmetrically supported torsion cantilevers/oscillators with highly compliant springs. These torsion probes offer advantages in atomic force microscopy (AFM) because they are small, have high optical gain, do not warp and can be made with two independent axes. Compared to traditional AFM cantilevers, these probes have higher frequency response, higher Q, lower noise, better optics (since the mirror does not bend) and two data channels. Soft small levers with sub-pN force resolution can resonate cleanly above 10 kHz in water. When fabricated with a ferromagnetic coating on the rigid reflecting pad, they can be driven magnetically or serve as high-resolution magnetometers. Asymmetric levers can be tapping mode probes or high-resolution accelerometers. The dual axis gimbaled probes with two orthogonal axes can operate on a standard AFM with single beam illumination. These probes can be used as self-referencing, drift free, cantilevers where one axis senses the substrate position and the other the sample position. These levers can be optimized for differential contrast or high-resolution friction imaging.
AB - We developed a mass production fabrication process for making symmetrically supported torsion cantilevers/oscillators with highly compliant springs. These torsion probes offer advantages in atomic force microscopy (AFM) because they are small, have high optical gain, do not warp and can be made with two independent axes. Compared to traditional AFM cantilevers, these probes have higher frequency response, higher Q, lower noise, better optics (since the mirror does not bend) and two data channels. Soft small levers with sub-pN force resolution can resonate cleanly above 10 kHz in water. When fabricated with a ferromagnetic coating on the rigid reflecting pad, they can be driven magnetically or serve as high-resolution magnetometers. Asymmetric levers can be tapping mode probes or high-resolution accelerometers. The dual axis gimbaled probes with two orthogonal axes can operate on a standard AFM with single beam illumination. These probes can be used as self-referencing, drift free, cantilevers where one axis senses the substrate position and the other the sample position. These levers can be optimized for differential contrast or high-resolution friction imaging.
KW - Atomic force microscopes
KW - Force
KW - Friction
KW - Friction force microscopes
KW - Magnetic force microscopes
KW - Microfabrication
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U2 - 10.1016/j.ultramic.2005.11.014
DO - 10.1016/j.ultramic.2005.11.014
M3 - Article
C2 - 16750300
AN - SCOPUS:33745596817
SN - 0304-3991
VL - 106
SP - 838
EP - 846
JO - Ultramicroscopy
JF - Ultramicroscopy
IS - 8-9
ER -