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Updated: Jul 27, 2025

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Plasmonic Scattering Imaging of Surface-Bonded Nanoparticles at the Solution-Solid Interface.

Wen-Li Lv1, Chen Qian1, Cheng-Xin Cao1

  • 1Hefei National Research Center for Physical Sciences at the Microscale, Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.

ACS Applied Materials & Interfaces
|June 9, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a new microscopy technique for imaging nanoscale objects at interfaces, overcoming background noise for clearer detection of surface-bonded particles and viruses. The method enhances plasmonic imaging for high-throughput sensing and understanding nanoscale properties.

Keywords:
background eliminationplasmonic imagingsolution−solid interfacesurface-bonded nanoparticlesvirus detection

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Area of Science:

  • Surface science
  • Nanotechnology
  • Optical microscopy

Background:

  • Imaging nanoscale objects at interfaces is crucial for understanding surface-tuned mechanisms.
  • Plasmonic imaging is a label-free, surface-sensitive technique for studying nanoscale objects at interfaces.
  • Direct imaging of surface-bonded nanoscale objects is hindered by uneven image backgrounds.

Purpose of the Study:

  • To develop a novel microscopy technique for detecting surface-bonded nanoscale objects.
  • To overcome strong background interference in imaging nanoscale objects at interfaces.
  • To enhance the capabilities of plasmonic imaging for high-throughput sensing.

Main Methods:

  • Developed a new surface-bonded nanoscale object detection microscopy.
  • Reconstructed accurate scattering patterns at different positions to eliminate background interference.
  • Operated effectively at low signal-to-background ratios.

Main Results:

  • Successfully detected surface-bonded polystyrene nanoparticles and severe acute respiratory syndrome coronavirus 2 pseudovirus.
  • Demonstrated compatibility with other imaging configurations like bright-field imaging.
  • Enabled optical scattering detection of nanoscale objects despite background noise.

Conclusions:

  • The new microscopy technique effectively eliminates background interference for nanoscale object detection at interfaces.
  • This method broadens the applications of plasmonic imaging for dynamic scattering imaging and high-throughput sensing.
  • Enhances understanding of nanoparticle and surface properties, composition, and morphology at the nanoscale.