研究目的
To develop a sequential method for obtaining an integrated core-shell-brush nanosystem that transduces light irradiation into a particle size change through a thermoplasmonic effect.
研究成果
The study successfully demonstrates the development of modular hybrid nanosystems with photo-thermo-physical transduction. These systems can be designed and produced with controllable responses to external stimuli, offering potential applications in smart carriers, responsive bioscaffolds, or soft robotics.
研究不足
The study focuses on the synthesis and characterization of the nanosystems and their response to light irradiation. The practical applications and scalability of these systems in real-world scenarios are not extensively explored.
The methodology involves the synthesis of hybrid monodisperse systems made up of functionalized silica colloids covered with controllable thermo-responsive Poly(N-isopropylacrylamide), PNIPAm, brushes, produced through radical photopolymerization. This methodology was then transferred to Au@SiO2 nanoparticles, leading to a core-shell-brush architecture. The experimental design includes optimization of PNIPAm photografting on SiO2 NPs surface, synthesis of core-shell Au@SiO2 NPs, and PNIPAm grafting on the Au@SiO2 NPs surface using the optimized conditions. The response of these systems to light irradiation was evaluated using in situ DLS.
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Tetraethylorthosilicate
TEOS
Sigma-Aldrich
Used in the synthesis of silica nanoparticles.
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polyvinylpyrrolidone
PVP
Sigma-Aldrich
Polymeric amphiphilic stabilizer.
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vinyltriethoxysilane
VTES
Sigma-Aldrich
Surface functionalization agent.
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N-isopropylacrylamide
NIPA
Sigma-Aldrich
Monomer for the synthesis of thermo-responsive polymer brushes.
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2,2-dimethoxy-2-phenylacetophenone
DMPA
Sigma-Aldrich
Photoinitiator for radical polymerization.
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benzophenone
BP
Sigma-Aldrich
Photoinitiator for radical polymerization.
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HAuCl4.3H2O
Sigma-Aldrich
Gold precursor for the synthesis of gold nanoparticles.
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sodium citrate
Sigma-Aldrich
Used in the synthesis of gold nanoparticles.
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Ru(bpy)3Cl2
Sigma-Aldrich
Fluorescent dye for bioimaging.
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