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Related Concept Videos

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Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
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Related Experiment Video

Updated: May 21, 2026

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

Published on: May 9, 2014

Monoalcohol-Directed Shape Control in a Surfactant-Free Gold Nanoplate Synthesis.

Brendan D Nieukirk1, Shuiyi Zhang2, Runze Tang3

  • 1Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, USA.

Small Methods
|May 20, 2026
PubMed
Summary

Researchers developed a novel surfactant-free photochemical method to synthesize gold nanoplates. This approach uses a simple monoalcohol solution, offering precise shape control without problematic additives for advanced nanomaterial applications.

Keywords:
density functional theorygold nanoplateslight‐mediatedmethanolmonoalcohol

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Gold Nanoparticle Synthesis
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Last Updated: May 21, 2026

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Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry

Published on: October 4, 2011

Area of Science:

  • Materials Science
  • Nanotechnology
  • Photochemistry

Background:

  • Controlling nanostructure shape is crucial but often relies on additives that hinder applications.
  • Surfactant-free synthesis offers cleaner nanoparticle surfaces but lacks shape control.
  • Existing methods struggle to achieve specific nanostructures without shape-directing agents.

Purpose of the Study:

  • To develop a shape-controlled, surfactant-free synthesis for noble metal nanostructures.
  • To investigate the mechanisms behind additive-free nanoparticle shape determination.
  • To establish a viable photochemical route for producing gold nanoplates.

Main Methods:

  • Seed-mediated photochemical synthesis in a HAuCl4, water, and monoalcohol solution.
  • Wavelength-dependent characterization of the synthesized nanostructures.
  • First-principles density functional theory (DFT) calculations to elucidate reaction mechanisms.

Main Results:

  • Successfully synthesized arrays of highly faceted gold nanoplates at room temperature.
  • Identified illumination as the critical factor driving nanoplate formation.
  • DFT calculations revealed {111} surface-selective co-adsorption of monoalcohols and chlorine drives 2D growth.

Conclusions:

  • Demonstrated the feasibility of shape-controlled, monoalcohol-based surfactant-free synthesis.
  • Advanced the mechanistic understanding of photochemical nanometal growth.
  • Established a pathway for producing planar gold nanostructures without persistent additives.