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Related Experiment Video

Updated: Jun 16, 2026

Laser-induced Forward Transfer of Ag Nanopaste
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Laser-induced Forward Transfer of Ag Nanopaste

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Direct Assembly of Magnetically Tunable Nanoallotropes as Photonic Inks.

Zhijie Chen1, Mengqi Xiao1, Chaoran Li1

  • 1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, 199 Ren'ai Road, Suzhou 215123 Jiangsu, PR China.

ACS Nano
|June 15, 2026
PubMed
Summary

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Researchers developed a magnetic assembly method to create tunable colloidal nanoallotropes. This breakthrough enables a novel photonic ink for multicolor printing and advanced photonic devices.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Colloidal Science

Background:

  • Fabricating colloidal allotropes with controlled architectures and properties is challenging.
  • A general and efficient method for large-area nanoallotrope fabrication is needed.

Purpose of the Study:

  • To develop a direct magnetic assembly strategy for constructing tunable nanoallotropes.
  • To create a versatile photonic ink for multicolor printing applications.

Main Methods:

  • Controlled orientation of Fe3O4@SiO2 nanoellipsoids using magnetic fields during drying.
  • Tuning magnetic field direction to influence electrostatic and magnetic dipolar interactions.
  • Utilizing physical boundaries to guide the assembly process.
Keywords:
magnetic nanoparticlesnanoallotropephotonic crystalphotonic inkrecyclable materialself-assemblystructural color

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Planar and Three-Dimensional Printing of Conductive Inks
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Planar and Three-Dimensional Printing of Conductive Inks

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Related Experiment Videos

Last Updated: Jun 16, 2026

Laser-induced Forward Transfer of Ag Nanopaste
08:07

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

Planar and Three-Dimensional Printing of Conductive Inks
10:49

Planar and Three-Dimensional Printing of Conductive Inks

Published on: December 9, 2011

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Main Results:

  • Formation of amorphous photonic glasses, hexagonal close-packed (hcp) crystals, and tunable monoclinic crystals.
  • Development of a recyclable, all-inorganic photonic ink (P-ink).
  • Demonstration of single-ink, multicolor writing and printing with high resolution and nonfading colors.

Conclusions:

  • The magnetic assembly strategy offers precise control over anisotropic colloid assembly.
  • The developed photonic ink provides a versatile platform for anticounterfeiting, color printing, and photonic devices.