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Related Experiment Video

Updated: May 13, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

A combined size sorting strategy for monodisperse plasmonic nanostructures.

Elisabetta Fanizza1, Nicoletta Depalo, Luciano Clary

  • 1Istituto per i Processi Chimico Fisici IPCF Consiglio Nazionale delle Ricerche CNR, c/o Dip. Chimica, via Orabona 4, 70126 Bari, Italy. e.fanizza@ba.ipcf.cnr.it

Nanoscale
|March 8, 2013
PubMed
Summary

Researchers fabricated silica-coated gold nanoparticles (Au@SiO2 NPs) with tunable plasmonic properties. This study offers a new method for controlling nanoparticle size and morphology for advanced material applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Controlling nanoparticle size and morphology is crucial for tuning plasmonic properties.
  • Microemulsion methods offer potential for fabricating complex nanostructures.
  • Understanding the role of capping agents is key to precise synthesis.

Purpose of the Study:

  • To fabricate highly monodisperse silica-coated gold nanoparticles (Au@SiO2 NPs) using a microemulsion approach.
  • To investigate synthesis parameters influencing nanoparticle morphology and plasmonic properties.
  • To provide insight into the silica shell growth mechanism and the role of capping agents.

Main Methods:

  • Microemulsion synthesis of gold nanoparticles (Au NPs) and subsequent silica coating.

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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
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Last Updated: May 13, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
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A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions

Published on: February 5, 2016

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  • Antisolvent titration for size-selective precipitation of oleylamine-capped Au NPs.
  • Density gradient centrifugation for sorting Au@SiO2 NPs by morphology.
  • Comprehensive characterization using morphological and spectroscopic techniques.

    • Main Results:

    • Achieved highly monodisperse Au and Au@SiO2 NPs with tuneable plasmonic properties.
    • Demonstrated antisolvent titration as an effective size selection technique.
    • Elucidated the critical role of oleylamine density in silica shell formation and core multiplicity.
    • Successfully sorted Au@SiO2 NPs and isolated fractions with unique morphologies, including multi-core structures.

    Conclusions:

    • The microemulsion approach combined with size selection and sorting techniques enables precise control over Au@SiO2 NP characteristics.
    • These tailored nanoparticles serve as versatile building blocks for plasmonic and photonic devices and metamaterials.
    • The findings provide a deeper understanding of nanoparticle synthesis and pave the way for advanced material design.