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Updated: Jun 15, 2026

Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method

Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method

Published on: January 15, 2012

Silver nanospirals via autoaccelerated oriented assembly.

Rok Mravljak¹, Aleksandra Kuljanin¹, Tina Skalar¹

¹Department of Chemical Engineering and Technical Safety, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia.

Communications Chemistry

|October 3, 2025

Summary

Researchers synthesized silver nanospirals with over 90% yield, revealing a novel formation mechanism involving stochastic dendrite arm mismatch during autoaccelerated oriented assembly. This discovery offers a rapid, bottom-up method for creating twisted nanocrystals for advanced applications.

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Area of Science:

Nanotechnology
Materials Science
Physical Chemistry

Background:

Spiral nanocrystals possess unique properties attractive for sensing, photonics, and biomedicine.
Noble metal nanoparticles, like gold and silver, exhibit strong plasmonic responses.
The formation mechanism of noble metal spirals, particularly silver, remains largely unknown.

Purpose of the Study:

To synthesize silver nanospirals with high yield.
To elucidate the formation mechanism of silver nanospirals.
To establish a controllable bottom-up synthesis route for twisted nanocrystals.

Main Methods:

Synthesis of silver nanoplates (AgNpt) using H2O2 and 3-mercaptopropionic acid (MPA) ligand.
Investigation of MPA concentration effects on morphology (nanoribbons, nanospirals, nanoflowers).
Analysis of ligand coverage-dependent conformational changes and interparticle attraction during autoaccelerated oriented assembly (AOA).

Main Results:

Achieved over 90% yield of silver nanospirals.
Identified stochastic mismatch of dendrite arms during AOA as the likely spiral formation mechanism.
Demonstrated ligand-specific spiral formation (MPA and 2MBA) linked to coverage-dependent conformation transitions.

Conclusions:

A novel mechanism for silver nanospiral formation via autoaccelerated oriented assembly has been proposed.
Ligand choice and concentration are critical for controlling twisted nanocrystal morphology.
This study presents a rapid, bottom-up approach for synthesizing tunable spiral nanocrystals.