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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...
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
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...
Forced Oscillations01:06

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.

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Related Experiment Video

Updated: Jun 23, 2026

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

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Published on: February 28, 2019

Frequency noise in frequency modulation atomic force microscopy.

Kei Kobayashi1, Hirofumi Yamada, Kazumi Matsushige

  • 1Innovative Collaboration Center, Kyoto University, Katsura, Nishikyo, Kyoto 615-8520, Japan. keicoba@iic.kyoto-u.ac.jp

The Review of Scientific Instruments
|May 2, 2009
PubMed
Summary
This summary is machine-generated.

Reducing noise in atomic force microscopy (AFM) displacement sensors is crucial for high-resolution imaging in liquids. This study details how lower sensor noise directly reduces frequency noise in dynamic AFM, especially in low-quality factor environments.

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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

Area of Science:

  • Surface Science
  • Nanotechnology
  • Physics

Background:

  • Atomic force microscopy (AFM) with frequency modulation (FM) detection is vital for atomic/molecular-scale material analysis.
  • High-resolution liquid imaging via FM-AFM is achievable by minimizing sensor noise and using small oscillation amplitudes, despite low Q-factors from liquid interactions.

Purpose of the Study:

  • To clarify the impact of displacement sensor noise reduction on frequency noise in FM-AFM, particularly in low-Q environments.
  • To emphasize the importance of reducing noise-equivalent displacement in sensors for enhanced FM-AFM performance in liquids.

Main Methods:

  • Detailed analysis of the contribution of displacement sensor noise to frequency noise in FM-AFM.
  • Investigation under conditions simulating low-Q environments typical of liquid AFM operation.

Main Results:

  • Quantified the relationship between displacement sensor noise and frequency noise in FM-AFM.
  • Demonstrated that reduced sensor noise significantly lowers frequency noise, especially when the cantilever's Q-factor is low.

Conclusions:

  • Minimizing noise-equivalent displacement in the cantilever displacement sensor is critical for achieving high-resolution FM-AFM imaging in liquids.
  • This noise reduction directly translates to improved frequency stability, enabling more accurate nanoscale investigations in challenging low-Q environments.