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Related Concept Videos

Corrosion02:49

Corrosion

28.6K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

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Corrosion-Protected Hybrid Nanoparticles.

Hyeon-Ho Jeong1,2, Mariana Alarcón-Correa1,3, Andrew G Mark1

  • 1Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 23, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to protect unstable nanoparticles using a hybrid 3D structure with a protective shell. This technique enhances nanoparticle stability in corrosive solutions, enabling new applications.

Keywords:
3D core–shell nanoparticlecorrosion protectionhybrid nanocolloidnanoscale encapsulation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Functional nanoparticles offer unique properties but suffer from instability in solution.
  • Corrosion of nanoparticles poses a significant challenge for applications in aqueous or biological environments.
  • Developing protective strategies is crucial for realizing the potential of nanoscale functional materials.

Purpose of the Study:

  • To present a generic scheme for creating hybrid 3D nanoparticles with a protective shell.
  • To demonstrate a vacuum-based method combining oblique physical vapor deposition and atomic layer deposition for nanoparticle encapsulation.
  • To showcase the flexibility in nanoparticle composition and protection against various environments.

Main Methods:

  • Utilizing vacuum-based growth and protection techniques.
  • Employing oblique physical vapor deposition (PVD) for nanoparticle core formation.
  • Integrating atomic layer deposition (ALD) for conformal shell encapsulation.

Main Results:

  • Successful fabrication of hybrid 3D nanoparticles completely encapsulated by a nanometer-thick protective shell.
  • Demonstration of multifunctional nanoparticles with ferromagnetic, plasmonic, and chiral properties.
  • Achieved enhanced stability of initially corrosive nanocolloids in acidic solutions for at least one week.

Conclusions:

  • The presented scheme offers a versatile approach to stabilize functional nanoparticles.
  • This method overcomes the challenge of solution instability for nanoscale materials.
  • The hybrid nanoparticles exhibit retained functionality and improved durability in harsh conditions.