| The metal and metal-semiconductor nanomaterials have attracted the enormous attention. And they are exploited for wide-ranging application in light absorption, optical detection, optical waveguide, photothermal conversion, optoelectronic applications, photocatalysis, biological tag, medical imaging, gas sensor, and so on. Moreover, the researches that the composition coupled with functional structure provide new ideas and ways for optimized, extended and innovated the performance of the functional materials. By biological evolved millions of years, nature materials implemented that the composition integrated with elaborate structure, which possessed excellent properties for mechanics, thermology, photology, electrology, magnetics and so on. So the nature materials give an inspiration for designing and researching the functional materials which possessed the integrated functions with the functional structures coupled with the components.By inspired from nature, drawn lessons from the fine functional structure of the biosome with excellent functional characteristics, implemented that the metal and metal-semiconductor nanomaterials integrated with elaborate structure.However, it is difficult to fabricate that with such sub-micrometer functional structure up to macro centimeter-scale, due to the limitations of traditional technologies. So it restricts the performance optimization and extension of the metal and metal-semiconductor combination nano functional materials. Meanwhile, it restricts their application in optics, thermology, electricity, chemistry, biology, medicine, and so on. Furthermore, it also restricts the systematical research on the coupling effect between the metal and semiconductor nanoparticles(NPs), and the coupling effect between the metal-semiconductor NPs and the 3D hierarchical sub-micron fine structure. Therefore, it is an urgent need to develop a new fabrication method that can fabricate the metal, metal-semiconductor combination nano functional materials with 3D hierarchical sub-micron fine structure, universally.By inspired from nature, biomimetic template synthesis is an efficient method to surmount the limitations of the traditional synthesis technologies, since nature has created a considerable amount of extraordinary structures with given functions. Butterfly is one of the most delicate species, and some of them possess subtle scales that bear complex periodic architecture at the sub-micrometer level. In this study, by optimizing and improving the current chemical synthesis technology of the nanomaterials and the biomimetic technology, the metal and metal-semiconductor functional nanomaterials at a macro centimeter-scale with the sub-micron antireflection quasi-photonic structure(AQPS) were fabricated by using the butterfly wings as the biomimetic template. The coupling effect between the AQPS and the Au, Ag or Cu NPs for enhanced broadband infrared absorption were researched, respectively. Furthermore, by experimentation and numerical simulation, the mechanism of the enhanced broadband infrared absorption was researched, revealing the inherent relationship between the light absorption mechanism and the coupling effect between the metal NPs and the AQPS. In addition, a combined metal-semiconductor NPs integrated with the AQPS to further enhance the broadband infrared absorption and infrared photothermal conversion were researched. By experimentation and numerical simulation, the mechanisms of the enhanced broadband infrared absorption and infrared photothermal conversion were discussed. Based on the mechanisms of the infrared absorption and infrared photothermal conversion of the carbon-matrix metal “butterfly wings”, a magnetoplasmonic functional material(carbon-matrix Ni wing) was fabricated which extended the wavelength of the excitation light for the optical-magnetic effect. Moreover, the mechanism of the infrared photothermal-induced variation of the magnetic properties was researched. The main results are as follows:1.The coupling effect between the AQPS and the Au, Ag or Cu NPs for enhanced broadband infrared absorption were researched, respectively. Optimized the component of the template, the carbon-matrix Ag “butterfly wing”was fabricated, which achieved the plasmon resonance and the coherent coupling between adjacent resonance systems integrated with the AQPS, and possessed a drastically enhanced infrared absorption over a broad spectral range. The mechanism that the plasmon resonance and the coherent coupling between adjacent resonance systems integrated with the AQPS enhance broadband infrared absorption, was proposed. Consequently, these work provide a new perspective for coupling the plasmon and the coherent coupling between adjacent resonance systems with AQPS.2. A combined metal-semiconductor NPs integrated with the AQPS to further enhance the broadband infrared absorption and infrared photothermal conversion were researched. We synthesized a macro centimeter-scale metal-semiconductor(Au-Cu S) combination NP system coupling with AQPS(Au-Cu S_T_FW) via a simple and promising method which combines chemosynthesis with biomimetic techniques. Au-Cu S_T_FW achieved more intensive enhancement broadband sunlight absorption and lower reflectance, specifically over the red and near infrared ranges. Furthermore, the enhancement absorption was also obtained over the mid infrared range. Due to the coupling effect of the efficient light-absorbing AQPS(physical factor) and the excellent IR light absorption and photothermal conversion material(chemical factor), the Au-Cu S_T_FW exhibited efficient infrared photothermal conversion efficiency(30.56%). Moreover, the Au-Cu S_T_FW achieves a significant breakthrough in the solar absorptance(98%) of the absorber among these solar collectors with a low emittance(0.566). Meanwhile, the Au-Cu S_T_FW is effective for photothermal conversion of solar energy, for the low temperature applications(T< 60 oC). We believe that this work provides a guideline for synthesizing metal-semiconductor combinations multicomponent NP systems integrated with the AQPS on a macro centimeter-scale, which is promising and significant for utilizing IR, and manufacturing a more efficient absorber of the solar collector for photothermal conversion, especially, over infrared range. The super properties of broadband sunlight absorption and efficient photothermal conversion also can be utilized to the photovoltaic systems, thermophotovoltaic systems, infrared imaging and more.3. The mechanism that the plasmon-to-exciton/plasmon coupling effect and the coherent coupling between adjacent resonant systems integrated with the AQPS enhanced broadband infrared absorption was proposed in our manuscript. Furthermore, the mechanism was confirmed by both of experimental results and simulation results. Moreover, this work combined the FDTD method with the Joule effect to simulate the photothermal conversion. By numerical simulation based on FDTD method and the Joule effect, we find that the more intensive heat source density distributes on the adjacent region between two plasmonic structures and the coherent coupling between adjacent resonant systems enhance hot power yield. Consequently, the mechanism that the coherent coupling between adjacent plasmonic resonant systems enhance photothermal yield was proposed. In addition, the most hot power yields of the Au-Cu S_T_W arise from the photothermal materials, which covered on the surface of the ridges of the AQPS.4. This work explored a straightforward and low-cost method for fabricating carbon-matrix nickel composite magnetoplasmonic films with AQPS(Ni@C_T_FW) on a macroscopic centimeter-scale, in which purely ferromagnetic nanostructures support plasmon resonance. The Ni@C_T_FW exhibited an enhanced broadband infrared absorption performance and an effective infrared optical-magnetic effect that infrared photothermal induced variation of the magnetic properties. In this work, we revealed the coupling effect between magnetoplasmonic NPs and the AQPS, and expounded the mechanism of infrared photothermal induced variation of the magnetic properties.In general, the work has great significance in current material design which demands that the material not only possesses mutli-dimension hierarchical sub-micron fine functional structure but also achieves the integration between the structure and function. And proposed a significant research method and a theoretical evidence for designing the metal, metal-semiconductor combination material is proposed. Moreover, the work provides a new perspective for manufacturing of the novel metal, metal-semiconductor combination material with 3D hierarchical sub-micron fine structure. |
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