Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding coupling between flow protecting fluid and deformation protected solids is necessary in order to optimize this functionality. We present a scaling analysis problem based on single variable, effective width squeeze flat rigid plates, predict that impact laminates optimized by using shear-thinning, not shear-thickening, fluids. The prediction verified experimentally measuring velocity pressure experiments....

In this article, we present a simple, rapid prototyped polystyrene-based microfluidic device with three-dimensional (3D) interconnected microporous walls for long term perfusion cell culture. Patterned 3D structures were created by chemical treatment together protective mask and the native hydrophobic nature of selectively made hydrophilic using oxygen plasma mask. Using culture device, successfully demonstrated support four days hepatocytes (C3A cells).

We present the photostability results of seven novel electro-optic chromophores made to be used in high-speed fiber optic signal modulators. measured photobleaching rate at room temperature by using a pump−probe technique. Thin polymer film guest−host samples were deposited on end SMF-28 pigtails and bleached 100 mW 1550 nm radiation as pump. The bleaching was monitoring main absorption band 660 probe beam that multiplexed into pigtail. relative reported figure merit which is proportional...

Several new high μβ chromophores have been synthesized. These were intentionally designed to study structure−property relationships. The synthetic strategy that was followed has described in our previous publications. Chromophore photostability investigated from a structural point of view. Contact and corona poling the also accomplished with 70 pm/V r33 being achieved at λ = 1550 nm. same studied two different polymer host systems compare their dependence electrooptic coefficient stability...

This article presents a simple, low-cost method of fabrication and the applications flexible polystyrene microfluidic devices with three-dimensional (3D) interconnected microporous walls based on treatment using solvent/non-solvent mixture at room temperature. The complete process from device design concept to working can be completed in less than an hour regular laboratory setting, without need for expensive equipment. Microfluidic were used demonstrate gas generation absorption reactions...

The heating effect in highly bent singlemode optical fibres under high power conditions was studied. It found that of the coating depends on bend radius and type telecommunication fibre used. detected only occurred at diameters much smaller than recommended for normal deployment.

ABSTRACT This article describes a solvent treatment process for transforming standard flat polystyrene surfaces into textured microenvironments three‐dimensional (3D) cell culture. The can be used with off‐the‐shelf microplates having 6, 12, 96, or even 384‐well formats and completed in few steps. surface microtexture resembles tightly packed, non‐interconnected micropores median pore size of either 115 19 μm depending on the strength mixture. Hansen solubility parameter analysis was to map...

Abstract We used a tunable near infrared fiber laser in the wavelength range of 1533–1573 nm to induce photothermal phase changes poly( N ‐isopropylacrylamide) (PNIPAM) aqueous solutions and hydrogels. The induces hydrophilic hydrophobic transition polymer by heating surrounding water. report our observations based on using novel backreflectance method coupled with visual cloud point measurements. At 1533 was induced at end single mode optical 9 mW power an ambient temperature 24°C. found...

A theoretical and experimental study of photothermal behavior in a commercially available optical path adhesive is described. Photothermal effects were examined for cw pulsed laser radiation (∼1 µs) at 1550 nm. fiber-optic backreflection technique was used to measure the thermo-optic glass transition temperature adhesive. This then calibrate blooming pump–probe experiments. Simple thermal models predict ΔT 300 mW (cw) be 65 °C 53 100 W (pulsed). Experimental results are reasonable agreement...

We describe the performance of a fiber-optic power-limiting component. The passive device is dynamically responsive to input signal and has been shown attenuate continuous-wave power with dynamic range up 9 dB at 150 mW 1550 nm. limiting threshold approximately 30 from 1530 1565 nm less than 10 1430 activated by photothermal defocusing mechanism in an optical polymer fixed between two expanded core fibers that collimate light through material. magitude response dependent on absorption...

We present a method of fabrication and applications flexible microfluidic devices with three-dimensional (3D) interconnected microporous walls based on treatment using solvent/non-solvent mixture at room temperature. The complete process from device design concept to working can be completed in less than an hour regular laboratory setting without the need expensive equipment. Microfluidic were used demonstrate gas generation absorption reactions by acidifying water carbon dioxide (CO2) gas....

Microfluidics is emerging as one of the fastest growing fields for chemical and biological applications. The demand has also increased methods fabricating low-cost prototype microfluidic devices rapidly with compatible materials novel functional attributes. One attractive feature that can be incorporated into a porous membrane or channel wall [1]. Devices such features potentially used multiphase catalytic reactions in pharmaceutical applications similar to gas-liquid-solid hydrogenation...

This article describes how eight different salts impact the rheological behavior of an aluminum titanate‐based ceramic paste. A capillary rheometer was used to measure thermal phase transition temperature a hydroxypropyl methylcellose binder in The causes paste increase viscosity and at which this occurs is defined as stiffening onset ( T ). found be linear function salt concentration slope relationship called strength. Four five behaved “salt‐out” depressed while three showed “salt‐in”...

Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding coupling between flow protecting fluid and deformation protected solids is necessary in order to optimise this functionality. We present a scaling analysis problem based on single variable, effective width squeeze flat rigid plates, predict that impact laminates optimised by using shear-thinning, not shear-thickening, fluids. The prediction verified experimentally measuring velocity pressure experiments....

In this paper we present the result of a sensitive experimental technique used to provide information about limitations using organic polymers for fiber-optic high power applications. Optical path adhesives are commonly in fiber optics assemblies due their mechanical and optical properties. However, use applications creates certain concerns short-term long-term stability adhesive material. We developed an approach evaluating effects devices. extended far field analysis on thin polymer layer...