THE INFLUENCE OF HUMIDITY ON THE SHEAR FORCE BETWEEN TIP AND SAMPLE IN NSOM USING PIEZOELECTRIC FORK

Tianhao Zhang, Zheyu Fang, Jianya Zheng, Limo Gao, Haidong Yang, Meirong Yin, Jia Yang, Yanzhen Lu, Huizhen Kang, Dapeng Yang and Huizhan Yang
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Tianhao Zhang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Zheyu Fang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Jianya Zheng: Modern Physics Lab, College of Physics Science, Nankai University, Tianjin, 300071, P. R. China
Limo Gao: Modern Physics Lab, College of Physics Science, Nankai University, Tianjin, 300071, P. R. China
Haidong Yang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Meirong Yin: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Jia Yang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Yanzhen Lu: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Huizhen Kang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Dapeng Yang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China
Huizhan Yang: Photonics Research Center, The MOE Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, and Tianjin Key Lab of Photonics Materials and Technology for Information Science, Nankai University, Tianjin, 300071, P. R. China

Surface Review and Letters (SRL), 2005, vol. 12, issue 03, 355-358

Abstract: The distance between tip and sample can be regulated using piezoelectric quartz fork glued with micro optic fiber probe. A biquadrate vibration equation for the fork–probe–sample system is established to theoretically analyze the relations of the electric current flow through fork versus tip–sample (T–S) distance(I–d). TheI–dcurve and the action distance for shear force are influenced by environmental humidity. The results reinforce the opinions in the earlier works by other researches that the physical origin of the shear force is due to a material filling the tip–sample gap. Furthermore, the intrinsic reasons for shear force damping between tip and sample have been confirmed and developed, i.e. the water and hydrocarbon coupled between optic fiber probe and sample due to the capillary cohesion force.

Keywords: NSOM; shear force; piezo-electric quartz fork (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0218625X05007116

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