Conferring
versatility to superhydrophobic materials
is extremely
desirable to advance their utility. Herein, we have developed a superhydrophobic
material with montmorillonite as microskeleton supports and in situ
grown ZIF-8 nanoparticles and loaded them with newly developed fluorescent
carbon dots. In situ growth of the ZIF-8 on OMMT constructs a dense
nanoscale rough structure and meanwhile self-assembly generates abundant
microporous, thus forming unique hierarchical microporous/microsheet/nanoparticle
tri-tier micro and nano structures. Then the multifunctional superhydrophobic
coating is fabricated by a facile spraying technique using polydimethylsiloxane
(PDMS) as a multifunctional polymer binder. The PDMS/RB-CDs/ZIF-8@OMMT
exhibits superhydrophobicity with a water contact angle of 164.7°
and a water sliding angle of 1.4°, which also possesses good
self-cleaning performance. Moreover, novel carbon dots are developed
in this work which can confer unique fluorescent properties and photothermal
properties to materials. Fluorescence characterization reveals the
multiple emission peaks among 300–800 nm and excitation wavelength
dependence and independence. Photothermal experiments unveil an efficient
light-to-heat conversion caused by the light traps and absorption
wavelengths associated with photothermal heating. Benefiting from
the dense microporous/microsheet/nanoparticle structures, the superhydrophobicity
is still maintained after 120 cycles of abrasion. Moreover, electrochemical
impedance spectroscopy (EIS) reveals a significant increase in impedance,
which is associated with excellent corrosion resistance. The superhydrophobic
coating also exhibits superior UV resistance and good thermal stability.
Multifunctional fluorescent superhydrophobic materials will enable
the development of various and potential applications in different
fields.
The
spread of drug-resistant bacterial infections can lead to serious
infectious diseases and pose a significant threat to public health
security. Metallic-nano-antibacterial materials are gradually becoming
a hot spot for antimicrobial biomaterials research with the advantages
of long service life and fast effective bactericidal speed. Considering
the construction of a safe and efficient photothermal therapy (PTT)
antibacterial platform as a promising strategy for the treatment of
bacterial infections, a near-infrared (NIR) bimetallic antibacterial
nanoparticle, adenosine 5′-triphosphate (ATP)@Au-Cu nanoparticle
(NP), with excellent photothermal conversion efficiency (59.3%) was
prepared in this paper; ATP@Au-CuNPs with their multiarm shaped structure
and NIR photothermal effect could significantly inhibit the growth
of bacteria at the low concentrations. In addition, the cytotoxicity
and hemolysis rate of the ATP-coated nanoparticles were reduced considerably,
and they also exhibited antibacterial and wound healing-promoting
effects in mice wound infection models. On this basis, this paper
focuses on the preparation and properties of ATP@Au-CuNPs and explores
their biological application in antibacterial therapy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.