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Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
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Rose Bengal-Mediated Photodynamic Therapy to Inhibit Candida albicans
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Host-Guest Interaction-Mediated Photo/Temperature Dual-Controlled Antibacterial Surfaces.

Yifeng Ni1, Dong Zhang2, Yang Wang1

  • 1College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.

ACS Applied Materials & Interfaces
|March 18, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel dual-controlled antibacterial surface that prevents bacterial attachment and kills bacteria. The smart surface can be regenerated on-demand, offering a promising platform for biomedical applications.

Keywords:
antibacterial mechanismlong-term antifoulingpolymeric brushsequential releasestimuli-responsive

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Polymer Chemistry

Background:

  • Bacterial attachment and colonization on surfaces pose significant challenges in healthcare settings.
  • Developing surfaces with on-demand regeneration capabilities for antibacterial applications remains a critical unmet need.

Purpose of the Study:

  • To engineer a smart, dual-controlled antibacterial surface utilizing host-guest interactions.
  • To achieve on-demand regeneration and successive antimicrobial functions for renewable antibacterial surfaces.

Main Methods:

  • Topological combination of stimuli-responsive polymers (poly(2-hydroxyethyl methacrylate) and poly(N-isopropylacrylamide)) with nanobactericide.
  • Integration of azobenzene/cyclodextrin (Azo/CD) host-guest complex for controlled release.
  • Utilizing photo (UV light) and temperature stimuli for surface control.

Main Results:

  • The developed surface demonstrated significant resistance to initial bacterial attachment (∼84.9%).
  • It effectively killed inevitable bacteria attacks (∼93.2%).
  • Over 94.9% of killed bacteria were released on-demand, even after three cycles, showcasing regenerative capability.

Conclusions:

  • The novel surface exhibits triple successive antimicrobial functions: resistance, killing, and on-demand release.
  • This research presents a promising strategy for developing renewable antibacterial surfaces.
  • The developed platform holds potential for various biomedical and surgical applications.