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Parameter optimization is performed, transmission characteristics are analyzed, and effects of fabrication errors are investigated for a lateral coupling microring resonator (MRR). Simulated results show that the fabrication errors result in the shift and shape change of the transmission spectrum compared with the designed case without errors. In order to reduce spectral changes, an efficient compensation method of fabrication errors is investigated. 相似文献
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Manufacturing materials are an essential element for the fabrication of microfluidic chips. PDMS, the most widely used polymeric material, is associated with apparent disadvantages such as hydrophobic nature, while other materials also suffer from some limitations. In this paper, a new soft lithographic route was proposed for the facile manufacturing of hydrophilic sandwich microchips, using bisphenol A based epoxy acrylate (BABEA) as a new patterning material. The BABEA copolymers are hydrophilic, highly transparent in visible range while highly untransparent when the wavelength is less than 290 nm, and of high replication fidelity. By combining with appropriate monomers, including glycidyl methacrylate, methylmethacrylate, and acrylic acid, the copolymers contain active functional groups, which allows for easy postmodification for desirable functional units. A fabrication procedure was proposed for manufacturing hybrid quartz/BABEA copolymer/quartz microchips. In the procedure, no micromachining equipments, wet etching, or imprinting techniques were involved, making the fabrication approach applicable in ordinary chemistry laboratories. The performance of the prepared microchips was demonstrated in terms of CIEF with UV-whole channel imaging detection. The hydrophilic microchannel ensures stable focusing while the polymeric middle layer acts as a perfectly aligned optical slit for whole channel UV absorbance detection. 相似文献
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Yanbao Zhao Li Yao Yuanchun Qi Lei Sun Zhishen Wu 《Journal of Sol-Gel Science and Technology》2009,50(1):3-7
Micrometer-sized flowerlike FeS/poly(vinyl pyrrolidone)(PVP) architectures were synthesized by solvothermal process with the
aid of thiourea, in which PVP may serve as soft templates. The FeS/PVP flowers have uniform morphologies with an average diameter
of 5 μm, made of several nanopetals. The formation of FeS/PVP flowers is a new kinetic control process. In this process, thiourea
molecules would be decomposed to produce “gas bubble”, and the “gas bubble” could make PVP chain segment rearrange along exterior
force, resulting in the morphology evolution. The higher “gas bubble” pressure would produce 3D flowers, and the lower pressure
would give a hollow structure. The evolution process from particles to 3D flowers is observed for the first time. In addition,
the hollow FeS/PVP and Cu2S/PVP spheres are also obtained by this technique. 相似文献
34.
Young-Geun Han Won-Taek Han Byeong Ha Lee Un-Chul Paek Youngjoo Chung Chang-Seok Kim 《Fiber and Integrated Optics》2001,20(6):591-600
We will present in this work the quantitative analysis of the relationship between the doping concentrations of GeO 2 and B 2 O 3 in the core and cladding regions and the temperature sensitivity of the resonance wavelength shift in long-period fiber gratings (LPFGs). Based on this analysis, the temperature sensitivity was suppressed and enhanced to 0.002 nm/°C and 0.28 nm/°C, respectively. We will also discuss the effect of the residual mechanical stress on the optical and mechanical properties of LPFGs. In particular, we will present the measurement results of the dependence of the refractive index change and mechanical strength on the residual mechanical stress in the boron-doped fibers with depressed clad and matched clad. 相似文献
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The mesopores of a monolithic silica column are very important and useful for chromatographic separation since they can offer sufficiently large surface area. In this paper, a novel method with the assistance of an ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate ([bmin]BF4)) was developed for the preparation of a C18-modified monolithic silica column for the first time, in which, the through pores and mesopores were formed simultaneously during the sol-gel reaction. The method is effective to simplify the preparation process of the silica-based monolithic columns. The factors influencing the sol-gel process, including the content of methanol and pH, were studied. The chromatographic performance of the prepared monolithic column was evaluated by the separation of alkylbenzenes. 相似文献
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This study investigates the dip coating fabrication process in detail. First the slurry formulation development is presented. This includes optimizing the concentration of slurry components. Controlling the coating thickness is then addressed. It is shown that a broad range of uniform thicknesses from a few microns up to a few hundreds of microns is achievable by adjusting the solid loading and/or the dip coating rate. This study reports that dip coating is a commercially reliable technique to fabricate micro-tubular solid oxide fuel cells not only because it is low cost but, more importantly, because it is fairly reproducible and highly controllable. 相似文献
40.
Si-qing Shen Qing Ma Zhi-bin Xu Jian-jun Xie Ying Shi Jian Wang Fei Ai 《Applied Surface Science》2011,258(5):1768
Tb3+-doped lutetium oxyorthosilicate (Tb:Lu2SiO5, LSO) films have been successfully fabricated on carefully cleaned silicon (1 1 1) substrates by Pechini sol–gel method combined with the spin-coating technique. X-ray diffraction (XRD), photoluminescence (PL) spectra and atomic force microscopy (AFM) were employed to characterize the resultant films. XRD patterns indicated that the films were crystallized into A-type LSO phase at 1000 °C, followed by a phase transition from A-type LSO to B-type LSO occurred at 1100 °C. The AFM observation revealed that the phosphor films were uniform and crack-free, consisting of closely packed grains with an average size of 200–300 nm. The PL spectra showed the characteristic emission 5D4 → 7FJ (J = 3–6) for Tb3+, The lifetime of Tb3+ in Tb:LSO films was 2.33 ms. The effect of heat-treatment temperature on the luminescent properties was also investigated. 相似文献