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Multiplexed Assembly of Plasmonic Nanostructures Through Charge Inversion on Substrate for Surface Encoding.

Yawen Wang1, Dong Li1, Yinghui Sun2

  • 1Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices , Soochow University , Suzhou 215123 , China.

ACS Applied Materials & Interfaces
|January 14, 2020
PubMed
Summary

Researchers developed a novel method for positioning plasmonic nanomaterials for information encoding. This technique enables the precise assembly of diverse nanostructures, paving the way for advanced nanotechnology applications.

Keywords:
LSPRencodingmetal nanoparticlesmultiplexed assemblysurface charge inversion

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Plasmonics

Background:

  • Plasmonic nanomaterials offer potential for information encoding and decoding.
  • Precise positioning of multiplexed nanomaterials into ordered structures is a significant challenge in nanotechnology.

Purpose of the Study:

  • To develop a novel method for fabricating diversified nanostructures using electrostatic-induced assembly.
  • To demonstrate the successful positioning of different gold nanoparticles into recognizable patterns.

Main Methods:

  • Fabrication of nanostructures via surface charge inversion (amino- to carboxyl-modified substrates).
  • Electrostatic-induced assembly of gold nanospheres (NSs) and peanut-like gold nanorods.
  • Characterization using dark-field scattering microscopy.

Main Results:

  • Successful sequential positioning of gold nanospheres and nanorods into spaced line patterns on a single substrate.
  • Distinct color contrast and spectrum differences observed in the designed nanoarrays due to unique optical properties.
  • Demonstration of a general strategy applicable to various nanoparticle types and compositions.

Conclusions:

  • The developed method enables precise fabrication of diversified nanostructures for information encoding.
  • The strategy offers a versatile platform for creating multifunctional nanoarrays with tunable optical properties.
  • This approach holds promise for advanced encoding applications in nanotechnology.