Related Experiment Video
Updated: Aug 6, 2025
08:21
Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography
Published on: September 2, 2017
7.2K
Strategy for Patterning Single Colloidal Gold Nanoparticles on Two Photon Polymerized and Functionalized Ultrathin
Abdelrahman Abdelaal1, Sylvain Blaize1, Ali Issa1
1Light, Nanomaterials & Nanotechnologies Laboratory (L2n), Université de Technologie de Troyes & CNRS EMR7004, 12 rue Marie Curie, 10004 Troyes Cedex, France.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 21, 2023
Summary
Researchers developed a new method for precisely trapping single nanoparticles using two-photon polymerization. This technique enables stable immobilization of gold nanoparticles, paving the way for advanced single photon sources.
Area of Science:
- Nanotechnology
- Photochemistry
- Materials Science
Background:
- Precise manipulation of single nanoparticles (NPs) is crucial but challenging due to their small size.
- Existing trapping techniques often lack stability, simplicity, robustness, or efficiency.
Purpose of the Study:
- To develop a stable, simple, and efficient method for local and deterministic trapping of single nanoparticles.
- To explore the potential of two-photon polymerization for fabricating nanostructures capable of immobilizing single gold nanoparticles (AuNPs).
Main Methods:
- Utilized two-photon polymerization (TPP) of a prefunctionalized photopolymer to create nanometric polymer layers.
- Conducted a detailed photochemical study to determine the threshold energy for polymerization.
- Identified a specific photopolymerization regime to control polymer size and achieve selective NP attraction.
Main Results:
- Successfully fabricated nanometric polymer layers capable of selectively attracting and immobilizing single colloidal gold nanoparticles (AuNPs).
- Demonstrated the ability to tune the size of the polymer structures by controlling the photopolymerization regime.
- Achieved stable and deterministic trapping of individual gold nanoparticles.
Conclusions:
- The developed TPP-based method offers a promising approach for the precise trapping of single nanoparticles.
- This technique is suitable for fabricating nanostructures for advanced applications, such as single photon sources.
