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Related Concept Videos

Redox Reactions01:24

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox titration is a chemical analysis technique used to determine the concentration of an unknown substance by measuring the electron transfer in a redox (reduction-oxidation) reaction. The process involves gradually adding a titrant with a known concentration of an oxidizing or reducing agent, to the analyte, the solution with an unknown concentration, until reaching the endpoint, which indicates the completion of the reaction between the two substances. Ensuring the analyte is in a single...
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Related Experiment Video

Updated: Aug 31, 2025

Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization
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Polymeric Nanoreactors with Chemically Tunable Redox Responsivity.

Lidong Gong1, Changrong Wang2, Pengcheng Xu3

  • 1Institute of Systems Biomedicine, Beijing Key Laboratory of Tumor Systems Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, P. R. China.

ACS Applied Materials & Interfaces
|August 19, 2022
PubMed
Summary

Chemically adjustable nanoreactors (CANs) offer tunable redox responsiveness for optimized bioimaging. These albumin-shelled nanoparticles provide a new strategy for enhancing nanomaterial performance in complex biological environments.

Keywords:
chemically adjustable nanoreactorscore−shell modificationglutathione-priminglibrary of nanoprobetumor imagingtunable redox responsivity

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Area of Science:

  • Nanomaterials Science
  • Biomedical Engineering
  • Chemical Biology

Background:

  • Bioresponsive nanomaterials are crucial for applications like disease imaging and drug delivery.
  • Optimizing nanomaterial response efficacy in complex in vivo environments remains a significant challenge.

Purpose of the Study:

  • To develop chemically adjustable nanoreactors (CANs) with tunable redox responsivity.
  • To investigate the influence of albumin shell modification and core properties on CAN responsiveness.
  • To evaluate the suitability of CANs for optimizing cancer imaging probes.

Main Methods:

  • Fabrication of core/shell nanoreactors with polymeric cores and albumin shells.
  • In vitro characterization of nanoparticle stability, size, and morphology.
  • Assessment of fluorescence activation ratios based on albumin modification density.
  • Tuning redox sensitivity to glutathione (GSH) levels via core polymer acid-base properties.

Main Results:

  • Stable, spherical CANs with approximately 50 nm particle size were successfully synthesized.
  • Albumin modification density directly influenced the fluorescence activation ratios of CANs.
  • Redox sensitivity to GSH levels (0.6-4 mM) was tunable by adjusting core polymeric blocks.
  • CANs demonstrated potential for optimized cancer imaging probes in vitro and in vivo.

Conclusions:

  • Chemically adjustable nanoreactors (CANs) provide a novel platform for tunable redox responsiveness.
  • This study presents a new design strategy for manipulating the performance of core/shell nanoreactors.
  • CANs offer a promising approach for enhancing bioresponsive nanomaterials in biomedical applications.