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Related Concept Videos

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Structures of Solids

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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Expanding Nanopatterned Substrates Using Stitch Technique for Nanotopographical Modulation of Cell Behavior
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Nanopattern-Embedded Micropillar Structures for Security Identification.

Zhi-Jun Zhao1, SoonHyoung Hwang1, Moonjeong Bok1

  • 1Department of Nano Manufacturing Technology , Korea Institute of Machinery and Materials , Daejeon 305-343 , South Korea.

ACS Applied Materials & Interfaces
|July 30, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel nanowelding technique to embed nanopatterns on micropillar surfaces for enhanced security identification. This method creates unique structural colors and patterns for anti-counterfeiting valuable products.

Keywords:
metal nanostructuresmicro-pillarnanopatternsnanoweldingsecurity identification

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Engineering

Background:

  • Developing advanced security features is crucial for authenticating high-value products and preventing counterfeiting.
  • Existing security identification methods often lack robust, multi-layered protection against sophisticated forgery attempts.
  • Micropillar structures offer a promising platform for creating unique visual and spectral security markers.

Purpose of the Study:

  • To develop and demonstrate a novel nanowelding method for fabricating embedded nanopatterns on micropillar surfaces.
  • To create advanced security patterns with unique structural colors and spectral characteristics for enhanced identification.
  • To evaluate the feasibility of applying this technology to various common substrates for broad applicability.

Main Methods:

  • Utilized nanowelding technology to embed metal nanopatterns onto micropillar-structured surfaces.
  • Employed substrates including polyethylene films, glass wafers, and silicon (Si) wafers, with chromium (Cr) and ultra-thin metal adhesive layers.
  • Characterized fabricated nanostructures using optical microscopy, scanning electron microscopy (SEM), and spectroscopy to analyze morphology, composition, and spectral properties.

Main Results:

  • Successfully fabricated nanopatterns embedded on micropillar-structured surfaces using the novel nanowelding approach.
  • Observed unique structural colors arising from nanostructures on micropillar surfaces, confirmed by optical microscopy.
  • Demonstrated precise characterization of nanopatterns and spectral peak shifts using SEM and spectroscopy, confirming enhanced security features.

Conclusions:

  • The developed nanowelding method provides a simple and effective way to create novel security patterns on diverse substrates.
  • The fabricated security patterns, featuring structural color and precise spectral characteristics, offer robust anti-counterfeiting capabilities.
  • This technology holds significant potential for applications in security identification for valuable products and in areas like semiconductor and transparent electrodes.