Microspheres ordered array

Fig. 6 (a) Schematic illustration of a flow cytometer used in a suspension array. The sample microspheres are hydrodynamically focused in a fluidic system and read-out by two laser beams. Laser 1 excites the encoding dyes and the fluorescence is detected at two wavelengths. Laser 2 is used to quantify the analyte, (b) Scheme of randomly ordered bead array concept. Beads are pooled and adsorbed into the etched wells of an optical fiber, (c) Scheme of randomly-ordered sedimentation array. A set of encoded microspheres is added to the analyte solution. Subsequent to binding of the analyte, microparticles sediment and assemble at the transparent bottom of a sample tube generating a randomly ordered array. This array is evaluated by microscope optics and a CCD-camera. Reproduced with permission from Refs. [85] and [101]. Copyright 1999, 2008 American Chemical Society... 

Ordered macroporous materials (OMMs) are a new family of porous materials that can be synthesized by using colloidal microspheies as the template. - The most unique characteristics of OMMs are their uniformly sized macropores arranged at micrometer length scale in three dimensions. Colloidal microspheres (latex polymer or silica) can self assemble into ordered arrays (synthetic opals) with a three-dimensional crystalline structure. The interstices in the colloidal crystals are infiltrated with a precursor material such as metal alkoxide. Upon removal of the template, a skeleton of the infiltrated material with a three-dimensionally ordered macroporous structure (inverse opals) is obtained. Because of the 30 periodicity of the materials, these structures have been extensively studied for photonic applications. In this paper, the synthesis and characterization of highly ordered macroporous materials with various compositions and functionalities (silica, organosilica, titana, titanosilicate, alumina) are presented. The application potential of OMMS in adsorption/separation is analyzed and discussed. 

Polystyrene microspheres are deposited in a hexagonally ordered array... 

Yamasaki T., Tsutsui T. Fabrication and optical properties of two-dimensional ordered arrays of silica microspheres. Ipn. J. Appl. Phys. 1999 38 5916-5921 Yang P., Rizvi A.H., Messer B., Chmelka B.F., Whitesides G.M., Stucky G.D. Patterning porous oxides within microchannel networks. Adv. Mater. 2001 13 427431 Ye Y.H., Mayer T.S., Khoo I.C., Divliansky I.B., Abrams N., Mallouk T.E. Self-assembly of three-dimensional photonic-crystals with air-core line defects. I. Mater. Chem. 2002 12 3637-3639... 

Ordered Array Structure of Polymer Microspheres on Patterned Substrate, and Arrangement... 

Figure 29a illustrates sehematically the cross section view, when D = 2.0pm, L = 2.0pm, and P = 4.0pm in the hexagonal patterned substrate. As expected, the second layer of ordered array structure was obtained successfully on the first layer as shown in Fig. 29b, which can be regarded as so-called Kagome structure [142]. The Kagome structure composed of dielectric rods or wire network has been theoretically investigated and expected to have a large flat band rather than Honeycomb structure [143-145]. In contrast, the same structure based upon polymer microspheres has scarcely been reported until now. The present fabrieation method... 

As shown in Fig. 8.9A, a full-color photonic crystal device was designed and fabricated in a form of electrochemical cell (Arsenault et al., 2007). The device was based on a two-component composite, that is, silica microspheres and polyferrocenylsilane (PFS). The silica microspheres with an ordered self-assembly array were deposited on ITO glass substrate and served as the inactive structural scaffold. PFS with pendant unsaturated C=C bonds were incorporated into the lattice spacing of silica microspheres and polymerized... 

First, some ordered structure of mono-dispersed polystyrene microspheres (PSMSs) is demonstrated on a lithographically patterned substrate by means of the tapered cell method [59], Next, we encapsulate poly(DCHD) NCs, that is poly(DCHD) core, with polystyrene (PS) shell by seed-emulsion polymerization method, and encapsulated poly(DCHD) core will also be arrayed on a patterned substrate [61]. 

Most of 3DOM metal oxides are fabricated by an alkoxide-based sol-gel process. The typical procedures include (i) preparation of a colloidal crystal template by ordering monodispersive microspheres (e.g., PS, PMMA or silica) into a face-centered close-packed array (ii) infiltration of a metal alkoxide solution into voids in the colloidal crystals, and in-situ solidification of the precimsor via a sol-gel process and (iii) template removal via a calcination or extraction pathway [99,217-219], Using the alkoxide-based sol-gel method, 3DOM oxides of Si, Ti, Zr, Al, Sb, W, Fe, and 3DOM mixed oxides of some of them can synthesized due to the moderate reactivity of their alkoxide preciuTsors [99], However, most of the other metal alkoxides exhibit high reactivity and their reactions are too quick to be... 

In a previous work [35], we studied the morphological behavior of core-shell type microspheres prepared from casting solution onto a carbon substrate. The particles of core-shell type microspheres were well aligned in a hexagonal array on the carbon substrate from two-dimensional observation. It was expected that in the core-shell type microspheres, such crystalline order in solu-... 

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