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Correction: Jiang et al. Methods for Obtaining One Single Larmor Frequency, Either <i>v</i><sub>1</sub> or <i>v</i><sub>2</sub>, in the Coherent Spin Dynamics of Colloidal Quantum Dots. <i>Nanomaterials</i> 2023, <i>13</i>, 2006.

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Colorimetric Nanoparticle-Embedded Hydrogels for a Biosensing Platform.

Taeha Lee1,2, Changheon Kim1, Jiyeon Kim1

  • 1Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Korea.

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|April 12, 2022
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Summary
This summary is machine-generated.

We developed novel polyaniline nanoparticle-hydrogel complexes (PNHCs) for rapid biosensing. These PNHC materials offer enhanced stability and sensitivity for detecting pH changes, including those from cancer cell metabolites.

Keywords:
agarosecolorimetric biosensornanoparticle–hydrogel complexpH sensorpolyaniline

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Hydrogels with colorimetric nanoparticles are used for sensing applications.
  • Challenges include poor nanoparticle dispersibility and weak mechanical strength in existing systems.

Purpose of the Study:

  • To develop a stable and sensitive nanoparticle-hydrogel complex for biosensing.
  • To investigate the potential of polyaniline nanoparticle-hydrogel complexes (PNHCs) as a pH sensor and for detecting cancer cell metabolites.

Main Methods:

  • Synthesized polyaniline nanoparticles (PAni-NPs) and incorporated them into an agarose gel matrix to form PNHCs.
  • Optimized PNHC fabrication by testing various pH solvents and evaluating colorimetric response based on thickness.
  • Assessed PNHC performance for pH sensing and detection of cancer cell metabolites, along with stability and cytotoxicity.

Main Results:

  • Achieved homogeneous dispersion of PAni-NPs within the hydrogel, creating PNHCs with improved properties.
  • Demonstrated excellent linearity in the colorimetric response of PNHCs to pH changes, confirming their potential as pH sensors.
  • Verified PNHC's ability to detect subtle pH variations from cancer cell metabolites without cytotoxicity and maintain structural integrity for up to 12 hours out of water.

Conclusions:

  • PNHCs offer a promising platform for sensitive and stable biosensing applications.
  • The developed PNHC material is suitable for disposable, patch-type wearable biosensing.
  • This technology has potential applications in diagnostics and real-time health monitoring.