Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Sequential [<sup>11</sup>C]Acetate and [<sup>18</sup>F]FDG PET/CT Assessment of Systemic Chronic Active Epstein-Barr Virus Disease: An Exploratory Retrospective Study.

Diagnostics (Basel, Switzerland)·2026
Same author

Habenula as a neural mediator of inattentive traits and sustained attention variability: A 7-Tesla magnetic resonance imaging study.

NeuroImage·2026
Same author

Mesenchymal Stromal Cells Improve Postoperative Cardiac Dysmaturation in a Juvenile Porcine Model.

Journal of the American Heart Association·2026
Same author

Seeing the invisible: practical strategies to maximize the clinical impact of photon-counting CT in abdominal imaging.

Abdominal radiology (New York)·2026
Same author

Multicenter comparison of hybrid and Norwood procedures in patients with Fontan circulation.

The Journal of thoracic and cardiovascular surgery·2026
Same author

Impact of Primary Graft Dysfunction on Neurodevelopmental Outcomes in Pediatric Heart Transplant Recipients.

medRxiv : the preprint server for health sciences·2026

Related Experiment Video

Updated: Jun 3, 2026

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping
14:13

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping

Published on: October 24, 2014

Reduction of frequency noise and frequency shift by phase shifting elements in frequency modulation atomic force

Kei Kobayashi1, Hirofumi Yamada, Kazumi Matsushige

  • 1Office of Society-Academia Collaboration for Innovation, Kyoto University, Katsura, Nishikyo, Kyoto 615-8520, Japan. keicoba@iic.kyoto-u.ac.jp

The Review of Scientific Instruments
|April 5, 2011
PubMed
Summary

Frequency noise in frequency modulation atomic force microscopy (FM-AFM) is reduced by increased effective Q-factor due to phase shifting elements. This improves quantitative force measurements in FM-AFM.

More Related Videos

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

Published on: December 20, 2016

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope
06:45

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Related Experiment Videos

Last Updated: Jun 3, 2026

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping
14:13

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping

Published on: October 24, 2014

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

Published on: December 20, 2016

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope
06:45

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Area of Science:

  • Atomic Force Microscopy
  • Nanoscale Science
  • Surface Physics

Background:

  • Frequency modulation atomic force microscopy (FM-AFM) is sensitive to oscillator noise, particularly at low modulation frequencies.
  • The magnitude of oscillator noise depends on the cantilever's phase-frequency curve slope.
  • Phase shifting elements (PSEs) in liquid environments can alter this curve and increase the effective Q-factor.

Purpose of the Study:

  • Analyze frequency noise in FM-AFM systems with PSEs.
  • Investigate the impact of increased effective Q-factor on oscillator noise and frequency shift.
  • Determine the effect on signal-to-noise ratio and quantitative force measurement.

Main Methods:

  • Theoretical analysis of frequency noise in FM-AFM with PSEs.
  • Modeling the influence of increased effective Q-factor on oscillation frequency and frequency shift.
  • Experimental validation of theoretical predictions.

Main Results:

  • Increased effective Q-factor reduces oscillator noise in FM-AFM.
  • Oscillation frequency deviates from resonance frequency with increased effective Q-factor.
  • Signal-to-noise ratio remains unaffected, but quantitative force measurement is impacted.

Conclusions:

  • Phase shifting elements can mitigate frequency noise in FM-AFM.
  • While noise is reduced, the accuracy of quantitative force measurements requires careful consideration of effective Q-factor changes.
  • Experimental results confirm the theoretical findings on noise and frequency shift reduction.