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Review of Scientific Instruments : Photothermal excitation and laser Doppler velocimetry of higher cantilever vibration modes for dynamic atomic force microscopy in liquid

By Shuhei Nishida, Dai Kobayashi, Takeo Sakurada, Tomonori Nakazawa, Yasuo Hoshi et al

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Book Id: WPLBN0002169697
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 12 December 2008

Title: Review of Scientific Instruments : Photothermal excitation and laser Doppler velocimetry of higher cantilever vibration modes for dynamic atomic force microscopy in liquid  
Author: Shuhei Nishida, Dai Kobayashi, Takeo Sakurada, Tomonori Nakazawa, Yasuo Hoshi et al
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Review of Scientific Instruments Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Dai Kobayashi, Takeo Sakurada, Tomonori Nakazawa, Yasuo Hoshi Et A, S. N. (n.d.). Review of Scientific Instruments : Photothermal excitation and laser Doppler velocimetry of higher cantilever vibration modes for dynamic atomic force microscopy in liquid. Retrieved from http://worldebooklibrary.com/


Description
Description: The authors present an optically based method combining photothermal excitation and laser Doppler velocimetry of higher cantilever vibration modes for dynamic atomic force microscopy in liquid. The frequency spectrum of a silicon cantilever measured in water over frequencies ranging up to 10 MHz shows that the method allows us to excite and detect higher modes, from fundamental to fifth flexural, without enhancing spurious resonances. By reducing the tip oscillation amplitude using higher modes, the average tip-sample force gradient due to chemical bonds is effectively increased to achieve high-spatial-resolution imaging in liquid. The method’s performance is demonstrated by atomic resolution imaging of a mica surface in water obtained using the second flexural mode with a small tip amplitude of 99 pm; individual atoms on the surface with small height differences of up to 60 pm are clearly resolved.

 

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