DOI: 10.1063/1.1416104. Analog frequency modulation detector for dynamic force microscopy

Analog frequency modulation detector for dynamic force microscopy

10.1063/1.1416104

Crossref journal-article

AIP Publishing

Review of Scientific Instruments (317)

Abstract

A new analog frequency modulation (FM) detector (demodulator) for dynamic force microscopy (DFM) is presented. The detector is designed for DFM by utilizing the FM detection method where the resonance frequency shift of the force sensor is kept constant to regulate the distance between a tip and a sample surface. The FM detector employs a phase-locked loop (PLL) circuit using a voltage-controlled crystal oscillator (VCXO) so that the thermal drift of the output signal is negligibly reduced. The PLL is used together with a frequency conversion (heterodyne) circuit allowing the FM detector to be used for a wide variety of force sensors with the resonance frequency ranging from 10 kHz to 10 MHz. The minimum detectable frequency shift was as small as 0.1 Hz at the detection bandwidth of 1 kHz. The detector can track a resonance frequency shift as large as 1 kHz. We also present some experimental results including the observations of the Si(111)-7×7 reconstructed surface and fullerene molecules deposited on the surface by DFM using this FM detector.

Bibliography

Kobayashi, K., Yamada, H., Itoh, H., Horiuchi, T., & Matsushige, K. (2001). Analog frequency modulation detector for dynamic force microscopy. Review of Scientific Instruments, 72(12), 4383â4387.

Authors 5

Kei Kobayashi (first)
Hirofumi Yamada (additional)
Hiroshi Itoh (additional)
Toshihisa Horiuchi (additional)
Kazumi Matsushige (additional)

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 4:01 a.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 3:50 a.m.)
Indexed	1 month ago (July 27, 2025, 3:29 a.m.)
Issued	23 years, 8 months ago (Dec. 1, 2001)
Published	23 years, 8 months ago (Dec. 1, 2001)
Published Print	23 years, 8 months ago (Dec. 1, 2001)

Funders 0

None

BibTeX

@article{Kobayashi_2001, title={Analog frequency modulation detector for dynamic force microscopy}, volume={72}, ISSN={1089-7623}, url={http://dx.doi.org/10.1063/1.1416104}, DOI={10.1063/1.1416104}, number={12}, journal={Review of Scientific Instruments}, publisher={AIP Publishing}, author={Kobayashi, Kei and Yamada, Hirofumi and Itoh, Hiroshi and Horiuchi, Toshihisa and Matsushige, Kazumi}, year={2001}, month=dec, pages={4383–4387} }

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