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Assembling patchy plasmonic nanoparticles with aggregation-dependent antibacterial activity.

Francesco Brasili1, Angela Capocefalo2, Damiano Palmieri1

  • 1Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy; Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy.

Journal of Colloid and Interface Science
|July 23, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed antibacterial nanomaterials using self-assembling gold nanoparticles and lysozyme. This tunable nanomaterial enhances antibacterial performance against drug-resistant bacteria by controlling optical properties and catalytic activity.

Keywords:
Antibacterial activityFunctional nanomaterialsGold nanoparticlesNanozymePatchy colloidsPlasmonicsProtein–nanoparticle interactionSelf-assembly

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Area of Science:

  • Nanomaterials Science
  • Biotechnology
  • Catalysis

Background:

  • Antibiotic resistance is a growing global health threat.
  • Developing novel antibacterial agents is crucial.
  • Nanomaterials offer unique properties for therapeutic applications.

Purpose of the Study:

  • To create a novel antibacterial nanomaterial.
  • To control its optical and catalytic properties.
  • To enhance its efficacy against drug-resistant bacteria.

Main Methods:

  • Fabrication of patchy plasmonic colloids via lysozyme adsorption to gold nanoparticles.
  • Self-limited assembly of nanoparticles to form tunable-sized assemblies.
  • Evaluation of aggregation-dependent catalytic activity and antibacterial performance.

Main Results:

  • Achieved size-tunable assemblies (hundreds of nanometers) with controllable optical responses (visible to near-infrared).
  • Demonstrated aggregation-dependent catalytic activity, enhancing antibacterial efficacy for specific assembly sizes.
  • Showcased significant antibacterial performance against multi-drug resistant bacteria.

Conclusions:

  • The developed nanomaterial offers precise control over structure, optical properties, and biological activity.
  • This platform enables the development of advanced antibacterial nanozymes.
  • Promising applications exist for treating infections caused by multi-drug resistant bacteria.