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Related Concept Videos

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In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Related Experiment Video

Updated: Feb 14, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Viable stretchable plasmonics based on unidirectional nanoprisms.

Ji-Eun Lee1, Choojin Park, Kyungwha Chung

  • 1Department of Chemistry and Nano Science, Division of Molecular Life and Chemical Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-Gil, Seodaemun-Gu, Seoul 03760, Korea. dhkim@ewha.ac.kr.

Nanoscale
|February 13, 2018
PubMed
Summary
This summary is machine-generated.

Flexible plasmonic sensors with tunable properties were created on stretchable substrates. These sensors show enhanced Raman scattering signals when stretched or contracted, enabling new bio-sensing and optical applications.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Spectroscopy

Background:

  • Ordered arrays of plasmonic nanostructures are crucial for advanced sensing applications.
  • Stretchable substrates offer potential for dynamic and wearable devices.
  • Tunable plasmon coupling is key to enhancing sensor performance.

Purpose of the Study:

  • To fabricate ordered plasmonic nanostructures on stretchable substrates.
  • To demonstrate tunable plasmon-coupling-based sensing properties under mechanical strain.
  • To investigate the potential of these devices for bio-sensing and optical applications.

Main Methods:

  • Fabrication of regular nanoprism patterns (Ag, Au, Ag/Au bilayers) on polydimethylsiloxane (PDMS) substrates.
  • Achieving uniform nanoprism orientation via metal deposition on single-crystal microparticle monolayers.
  • Utilizing surface-enhanced Raman scattering (SERS) for sensing measurements under uniaxial extension and contraction.
  • Employing finite-difference time-domain (FDTD) simulations to understand electromagnetic field enhancement.

Main Results:

  • Demonstrated tunable plasmon-coupling-based sensing properties upon substrate extension and contraction.
  • Observed a 6-fold enhanced SERS signal for Ag/Au bilayer sensors under 20% uniaxial extension.
  • Reported a 3-fold SERS signal increase upon 6% contraction compared to Au nanoprism arrays.
  • FDTD simulations corroborated the tunable electromagnetic field enhancement due to localized surface plasmon resonance (LSPR) coupling.

Conclusions:

  • Developed advanced flexible plasmonic-coupling-based devices with tunable and quantifiable performance.
  • The fabricated sensors show significant potential for practical bio-sensing and biotechnological applications.
  • These findings pave the way for novel optical devices utilizing dynamic plasmonic properties.