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Updated: May 2, 2026

Monitoring Conformational Dynamics of Single Unmodified Proteins using Plasmonic Nanotweezers

Monitoring Conformational Dynamics of Single Unmodified Proteins using Plasmonic Nanotweezers

Published on: March 21, 2025

Observing optical plasmons on a single nanometer scale.

Moshik Cohen¹, Reuven Shavit², Zeev Zalevsky³

¹1] Faculty of Engineering, Bar-Ilan University, Ramat-Gan 52900, Israel [2] Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.

Scientific Reports

|February 22, 2014

Summary

This summary is machine-generated.

Kelvin Probe Force Microscopy (KPFM) now images optical plasmonic waves with nanometer resolution. This breakthrough enables detailed study of light-matter interactions at the nanoscale for advanced applications.

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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

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Last Updated: May 2, 2026

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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

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Published on: December 11, 2013

Area of Science:

Nanophotonics
Surface Plasmon Resonance
Scanning Probe Microscopy

Background:

Plasmonic structures confine light to subwavelength volumes, driving interest in nanoscale light-matter interactions.
Investigating and imaging optical plasmonic waves at the single nanometer scale presents significant challenges due to size and energy constraints.

Purpose of the Study:

To image and characterize plasmonic modes using Kelvin Probe Force Microscopy (KPFM) under optical illumination.
To achieve unprecedented spatial resolution and measurement sensitivity for optical plasmons.

Main Methods:

Utilized Kelvin Probe Force Microscopy (KPFM) with optical illumination.
Performed experimental imaging and characterization of plasmonic modes.
Conducted theoretical calculations for comparison with experimental data.

Main Results:

Demonstrated imaging of plasmonic modes with single nanometer spatial resolution and sensitivity.
Showed that KPFM maps provide valuable information on the phase of the optical near field.
Developed a theoretical model linking surface plasmons to KPFM-measured workfunction.

Conclusions:

KPFM is a viable technique for high-resolution measurements of optical plasmons.
The findings pave the way for quantum plasmonic imaging on submolecular scales.
This research advances the study of light-matter interactions at the nanoscale.