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Multidomain-Based Responsive Materials with Dual-Mode Optical Readouts.

Yil-Hwan You, Aniket Biswas, Ashvin T Nagaraja

  • 1Department of Materials Science and Engineering , Hongik University , 121-791 Seoul , South Korea.

ACS Applied Materials & Interfaces
|March 26, 2019
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Summary
This summary is machine-generated.

New responsive materials enable dual-mode sensing using surface-enhanced Raman spectroscopy (SERS) and phosphorescence lifetime. This dual-mode sensing improves measurement accuracy and offers built-in redundancy for chemical and biosensing applications.

Keywords:
SERShydrogelmicrodomainmultimode sensingphosphorescence lifetime

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Biotechnology

Background:

  • Developing advanced sensors for accurate chemical and biological analysis is crucial.
  • Existing single-mode sensors have limitations in accuracy and redundancy.
  • Responsive materials offer potential for novel sensing platforms.

Purpose of the Study:

  • To design and demonstrate responsive materials for dual-mode sensing using SERS and phosphorescence lifetime.
  • To integrate pH-sensitive and oxygen-sensitive microdomains into a single hydrogel.
  • To validate the feasibility of redundant multimode sensing for improved accuracy.

Main Methods:

  • Incorporation of microcapsules containing gold nanoparticles with pH-sensitive Raman molecules for SERS.
  • Inclusion of microcapsules with oxygen-sensitive benzoporphyrin phosphors for phosphorescence lifetime measurements.
  • Fabrication of a single hydrogel matrix embedding these distinct microdomains.
  • Demonstration of sensing capabilities using glucose oxidase reaction.

Main Results:

  • Successfully created a dual-mode sensor hydrogel with distinguishable SERS and phosphorescence signals.
  • Dual-mode sensor performance was comparable to standalone single-mode sensors.
  • Redundant sensing demonstrated proportional signal changes with opposite directionality for glucose concentration.
  • Micro-/nanocomposite materials show promise for enhanced measurement accuracy.

Conclusions:

  • Responsive micro-/nanocomposite materials can achieve intrinsic multimode sensing with built-in redundancy.
  • This approach enhances measurement accuracy and reliability in chemical and biosensing.
  • The developed dual-mode sensing platform has broad applicability in various sensing fields.