Step response measurement of AFM cantilever for analysis of frequency-resolved viscoelasticity

Autor:	Yoshitaka Naitoh, Yasuhiro Sugawara, Masami Kageshima, Yan Jun Li, Shinkichi Kurachi, Tatsuya Ogawa
Rok vydání:	2010
Předmět:	Cantilever Chemistry System of measurement Analytical chemistry Atomic and Molecular Physics and Optics Viscoelasticity Electronic Optical and Magnetic Materials Magnetic field Step response Deflection (engineering) Wideband Composite material Instrumentation Excitation
Zdroj:	Ultramicroscopy. 110:612-617
ISSN:	0304-3991
DOI:	10.1016/j.ultramic.2010.02.020
Popis:	Extension of AFM-based viscoelasticity measurement into a frequency-resolved analysis is attempted. A cantilever immersed into and interacting with distilled water was employed for the trial system. Using a home-built wideband magnetic excitation AFM, a step force with a transient time less than 1 μs is applied to the AFM cantilever and its deflection is measured. The 1st and 2nd mode resonance ringing of the cantilever was suppressed using quality-factor-control technique, so that the measurement system becomes equivalent to driving a resonance-free virtual cantilever within the bandwidth limited by the surviving 3rd mode resonance. From the obtained response of the cantilever deflection, a frequency-dependent complex compliance of the cantilever-water system was derived in a frequency range of 1–100 kHz. Effect of water confining between the tip and a mica substrate is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6e142537cdff6cfc89d90eb37d52dd9 https://doi.org/10.1016/j.ultramic.2010.02.020 Zobrazit plný text záznamu Full Text from ScienceDirect