The
enhancement of the nonlinear optical properties of hybrid nanoparticle
films by coupling between metallic and plasmonic semiconducting nanoparticles
is shown. A heterostructure comprising CuS and Au nanoparticle films
separated by a thin layer of insulating ligands enhanced the yield
of second-harmonic light by a factor of 3.3 compared with the sum
of the constituent nanoparticles on their own. Heterostructures were
fabricated with scalable solution-processing techniques that can create
devices of arbitrary geometry. In addition to harmonic generation,
the multiple-photon photoluminescence response of Au, CuS, and heterostructured
films is also explored.
Commercial polymers have large cost advantage to drive HCPs to industrialize. The AHCPNPs using commercial PS as main block prove that it still has well-defined microporous structure, high specific surface area and extremely CO2 capture capacity.
Although nano‐porous materials are widely used, they are still difficult to prepare in large size and expand flexibly. In this work, a new method for the synthesis of porous materials is proposed. First, the block polymers were prepared by atom transfer radical polymerization. Through electrostatic spinning, the fiber films were fabricated, then the fibers were modified by surface post‐treatment and related Friedel–Crafts alkylation reaction. The pore and CO2 adsorption properties of the porous fiber films are characterized by nitrogen adsorption–desorption isotherm. In order to improve the pore properties and CO2 adsorption properties of thin films, the additives and pretreatment process are optimized. The maximum specific surface area of the porous fiber membrane is determined to be 640 m2/g, and the CO2 adsorption capacity is high up to 36.3 wt.% (8.68 mmol/g). Moreover, the porous fiber membrane derived from this strategy is superior in the aspects of large size, convenient adjustment and simple processing, which makes up for the drawbacks of traditional porous materials. The fiber membrane obtained by this strategy has high productivity, and the fiber membrane is easy to be postprocessed, which can be integrated into functional devices, and is widely used.
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