The serious threat of antibiotic-resistant
bacterial infections
has brought an urgent need for the development of new antibacterial
nanomaterials. We encapsulate glutathione (GSH)-protected gold nanoclusters
(AuNCs) in zeolitic imidazolate frameworks-8 (ZIF-8) and present their
potential in antibacterial capabilities. Under white light irradiation,
AuNCs-embedded ZIF-8 nanocomposites show assembly-enhanced emission
and reactive oxygen species (ROS) generation. AuNCs@ZIF-8 exhibit
almost complete inactivation of bacterial growth within 60 min of
light irradiation. Scanning electron microscopic results show that
AuNCs@ZIF-8 nanocomposites are captured by bacterial cells, and the
leakage of alkaline phosphatase and nucleotides from bacteria demonstrate
that the photoinduced ROS can easily destroy the bacterial surface
and totally kill the bacteria. Herein, our antibacterial nanocomposites
have photoenhanced bactericidal capability and show promising applications
for sterilization.
Bacterial infection has increasingly affected people’s life, therefore it is significant to explore novel antibacterial agents and strategies for efficient disinfection. Herein, we designed ZIF-8 based composites ICG@ZIF-8/PDA/Ag, which encapsulate...
A new type of Ag@SnS2 was established with Ag decorated on SnS2 surface for improved photothermal conversion capability. Ag@SnS2 exhibited a robust in vitro antibacterial effect and in vivo wound disinfection under NIR laser irradiation.
A hollow core-satellite ZIF-8/PDA/AgNPs was established and studied as an antibacterial agent. Polydopamine (PDA) was coated on ZIF-8 surface to form a hollow structure because ZIF-8 core was etched by the chelation of PDA and Zn2+. Then AgNPs were homogeneously decorated on the surface of ZIF-8/PDA by in situ reduction of Ag+ to avoid their aggregation. ZIF-8/PDA/AgNPs have good antibacterial activity, and they can totally inhibit bacterial growth at the concentration of 16 µg mL−1.
In this work, we demonstrated a facile approach for the formation of Ag octopods via pseudomorphic transformation of Ag2O by using histidine as a shape-directing agent. In this approach, Ag2O...
In this work, we
demonstrated a facile approach for fabrication
of Au nanoflowers (Au NFs) using an amino-containing organosilane,
3-aminopropyltriethoxysilane (APTES), as a shape-directing agent.
In this approach, the morphology of the Au particles evolved from
sphere-like to flower-like with increasing the concentration of APTES,
accompanied by a red shift in the localized surface plasmon resonance
peak from 520 to 685 nm. It was identified that the addition of APTES
is profitable to direct the preferential growth of the (111) plane
of face-centered cubic gold and promote the formation of anisotropic
Au NFs. The as-prepared Au NFs, with APTES on their surface, presented
effective catalytic and surface-enhanced Raman scattering (SERS) performances,
as evidenced by their applications in catalyzing the dimerization
of p-aminothiophenol and monitoring the reaction
process via in situ SERS analysis.
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