Related Experiment Video
Updated: Aug 2, 2025
08:19
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
18.3K
Block Copolymer-Templated Au@CdSe Core-Satellite Nanostructures with Solvent-Dependent Optical Properties
Sajan Singh1,2, Labeesh Kumar2, Andriy Horechyy2
1Department of Textile & Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi- 110016, India.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 19, 2023
Summary
We fabricated core-satellite nanostructures using block copolymers, gold nanoparticles, and quantum dots. Solvent choice tunes nanoparticle distance, controlling energy transfer for applications in photonics and sensors.
Area of Science:
- Nanotechnology and Materials Science
- Photochemistry and Photophysics
Background:
- Block copolymer (BCP) micelles offer a versatile platform for creating complex nanostructures.
- Controlling nanoscale distances is crucial for optimizing energy transfer processes like Förster resonance energy transfer (FRET).
Purpose of the Study:
- To fabricate and characterize core-satellite nanostructures with a gold nanoparticle (AuNP) core and cadmium selenide (CdSe) quantum dot (QD) shell.
- To investigate the influence of solvent environment on the nanostructure's morphology and FRET efficiency.
- To explore the potential of these nanostructures in photonics, optoelectronics, and sensor applications.
Main Methods:
- Asymmetric polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) BCPs were used to form micelles.
- AuNPs were incorporated into the core, and CdSe QDs were attached to the corona.
- Time-resolved photoluminescence spectroscopy was employed to analyze FRET dynamics.
Main Results:
- Well-defined core-satellite nanostructures with a PS/Au core and P4VP/CdSe shell were successfully fabricated.
- Solvent-selective swelling of the nanostructures modulated the distance between AuNPs and CdSe QDs.
- FRET efficiency and donor emission lifetime (12.3 to 10.3 ns) were tuned by altering the solvent, confirming distance control.
Conclusions:
- Solvent manipulation provides a facile method to tune interparticle distances and FRET behavior in core-satellite nanostructures.
- These tunable nanostructures demonstrate significant potential for advanced applications in photonics, optoelectronics, and sensing.
