| Impressive examples existing in nature show delicate ordered micro/nano structure, which endow various functions and properties to living creatures. Recent years, manufacturing ordered structure artificially has become a hotspot and the research of developing related functions is prosperous. One dimensional photonic crystal(1DPC) is a representative field among them. 1DPC is a kind of ordered structure consisting of materials of different refractive index distributed along one direction, the structure of 1DPC is clear and the fabrication is simple and controllable. Photonic band gap(PBG) is the characteristic property of 1DPC, it is a wavelength range which prohibits the light propagation within this range. Scientists can modulate the light propagation using PBG and fabricate perfect reflector, optical waveguide and low-threshold laser etc. The position of PBG is strongly affected by the 1DPC structure, the manipulation of PBG position can be realized by adjusting the 1DPC structure. The external stimuli can also induce the change of 1DPC structure, thus the 1DPC can make response through movement of PBG. Besides, if the movement of PBG is within visible range, the sample will exhibit obvious color change which can be detected by naked eyes. This is the target that scientists pursue.Recent years, nanotechnology develops prosperously and is widely used in photo, electric and energy field etc. With the development of nanotechnology, synthesis and applications of functional nanoparticles is of high-interests among scientists. Researchers have developed a series of functional nanoparticles including metal, semi-conductor and carbon nanodots. They are applied to sensors, LEDs and energy fields for the unique properties such as fluorescence, catalysis, photoelectric conversion and responsiveness. In this paper, we combine the 1DPC structure and functional nanoparticles together, successfully achieve the function integration and structure evolvement.In the second chapter, we integrated Au nanorods into thermo sensitive 1DPC throughAu surface modification, fabricated an IR sensitive 1DPC. First, we characterized the Au/1DPC hybrid system, the Au nanorods and 1DPC remained their own properties and the system is of good repeatability and stable under external stimuli. Next, we took IR measurements by exposed the system to IR light, results showed that the hybrid system was much more sensitive than the pure 1DPC. We also studied the temperature, refractive index and layer thickness during the IR measurements to clarify the responsive mechanism: gold NRs absorbed the IR light and converted into heat energy. Then the system temperature raised and 1DPC lost water molecules and the RI value increased. These changes narrowed the RI contrast between two polymer layers and finally induced the disappearance of PBG and the color vanished. At last, we realized visible detection of different wavelength IR light through doping Au nanorods of different absorbance.In the third chapter, p H-sensitive 1DPC and carbon dots fluorescence single film on separate sides of a transparent quartz substrate is fabricated. First, high-brightness carbon dots were synthesized and mixed with PAA to fabricate fluorescence single film. The emission of such film was stable under different p H buffer solution. Then we studied the morphology, basic optical properties and p H-response behavior of 1DPC verifying the system was of good response stability. Next, we integrated fluorescence film and 1DPC with PBG located near exciting light and emission light together, realized the fluorescence enhancement and reducing in the same device through changing the direction of incident light. At last, we achieved the modulation of fluorescence intensity at different p H through adjusting the original PBG position of 1DPC.In the fourth chapter, a rapid and cost effective method to fabricate three dimensional(3D) stacked ordered structures is established by photo-generating silver networks inside a 1DPC structure composed of PVA and PMMA. By designing the photo-mask meticulously, the silver nanoparticles produced by UV light aggregated to form frameworks performing as building blocks, thus converting the 1D structure into 3D. First, most of the silver ions were reduced to silver nanoparticles which was verifiedby absorbance spectra, TEM and XPS tests. Next, we studied the kinetics of reducing duration to clarify the reducing mechanisms. Then we studied the influencing factors of the reducing procedure including number of layers, period and silver doping amount. At last, we characterized the 3D silver networks through microscope, SEM and surface wettability. The as-prepared 3D stacked ordered structures were of potential applications in fields such as sensors, cell cultivation and photonic meta-materials. Key Words:... |
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