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Updated: Feb 26, 2026

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

Humidity-Responsive Single-Nanoparticle-Layer Plasmonic Films.

Jianlei Shen¹, Binquan Luan², Hao Pei¹

¹Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.

Advanced Materials (Deerfield Beach, Fla.)

|July 18, 2017

Summary

This summary is machine-generated.

Researchers developed humidity-responsive 2D plasmonic nanostructures using gold nanoparticles (AuNPs). These single-nanoparticle-layer (SNL) films exhibit reversible color changes with humidity, enabling new nanodevices.

Keywords:

DNA chromogenic films gold nanoparticles plasmon coupling single nanoparticle layers

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Last Updated: Feb 26, 2026

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Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

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Published on: September 2, 2017

Area of Science:

Materials Science
Nanotechnology
Plasmonics

Background:

Two-dimensional (2D) materials offer unique properties and significant application potential.
Plasmonic nanostructures are crucial for advanced optical and sensing applications.
Controlling nanostructure properties with external stimuli like humidity is a key challenge.

Purpose of the Study:

To develop humidity-responsive 2D plasmonic nanostructures with switchable chromogenic properties.
To investigate the relationship between hydration, plasmonic coupling, and color change in single-nanoparticle-layer (SNL) films.
To engineer responsive surface-enhanced Raman scattering (SERS) substrates.

Main Methods:

Fabrication of single-nanoparticle-layer (SNL) plasmonic films using DNA hybridization-directed anchoring of gold nanoparticles (AuNPs).
Characterization of plasmonic responses and chromogenic properties upon wetting-dewetting transitions.
Investigation of hydration effects on inter-nanoparticle electric field distribution.

Main Results:

Demonstrated rapid and reversible red-blue color change in centimeter-scale 2D SNL films due to hydration-induced plasmonic coupling.
Confirmed that hydration finely tunes the electric field distribution between AuNPs.
Developed responsive SERS substrates with spatially homogeneous hot spots.

Conclusions:

DNA-mediated 2D SNL structures offer a pathway for creating humidity-responsive plasmonic nanodevices.
The switchable chromogenic properties are linked to hydration-modulated plasmonic coupling.
These findings open avenues for miniaturized plasmonic devices with tunable optical and sensing capabilities.