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Atomic Force Microscopy

Atomic Force Microscopy

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

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Published on: October 24, 2014

Optical force mapping at the single-nanometre scale.

Junsuke Yamanishi^1,2, Hidemasa Yamane^3,4, Yoshitaka Naitoh¹

¹Department of Applied Physics, Osaka University, Suita, Osaka, Japan.

Nature Communications

|June 24, 2021

Summary

This summary is machine-generated.

Researchers visualized the 3D optical force field around quantum dots with nanometer resolution using photoinduced force microscopy (PiFM). This technique offers crucial insights for advanced optical devices and photocatalysis applications.

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Area of Science:

Nanophotonics Science
Quantum Dot Research
Surface Science

Background:

Understanding the nanoscale optical response is vital in nanophotonics.
Photoinduced Force Microscopy (PiFM) visualizes nanoscale optical fields via tip-sample optical gradient forces.

Purpose of the Study:

To demonstrate 3D photoinduced force field visualization around quantum dots with single-nanometer spatial resolution.
To overcome limitations of photothermal expansion effects in ultra-high vacuum conditions.

Main Methods:

Utilized photoinduced force microscopy (PiFM).
Employed a heterodyne frequency modulation technique.
Achieved ultra-high vacuum conditions for measurements.

Main Results:

Achieved 3D mapping of photoinduced interaction potential and force field vectors around quantum dots.
Demonstrated a spatial resolution of approximately 0.7 nm for PiFM imaging.
Visualized the optical field around composite quantum dots with photocatalytic activity.

Conclusions:

Single-nanometer scale 3D photoinduced field visualization is critical for advancing nanophotonics.
This technique is crucial for applications in photocatalysis, optical functional devices, and optical manipulation.