Abstract The fabrication of magnetically functionalized core/shell microspheres by using the microfluidic flow‐focusing (MFF) approach is reported. shell each microsphere embedded with magnetic nanoparticles, thereby enabling to deform under an applied field. By encapsulating a drug, for example, aspirin, inside microspheres, drug release enhanced compression–extension oscillations that are induced AC This active pumping mode can be controlled varying frequency and magnitude field as well...

We report a simple, low-cost and detachable microfluidic chip incorporating easily accessible paper, glass slides or other polymer films as the materials along with adhesive wax recycling bonding material. use laser to cut through paper film form patterns then sandwich between sheets membranes. The hot-melt can realize bridge various materials, for example, polymethylmethacrylate (PMMA) film, sheets, metal plate. process is reversible reusable melting cooling process. With this process,...

Herein, we describe the development of a multilayer droplet microfluidic system for creating concentration gradients and generating microdroplets varying composition high-throughput biochemical cell-based screening applications. The 3D droplet-based device consists multiple PDMS layers, which are used to generate logarithmic gradient reagent profiles. Parallel flow focusing structures form picoliter-sized droplets defined volumes but composition. As proof concept, demonstrate rapid enzymatic...

Abstract As crystallization processes are often rapid, it can be difficult to monitor their growth mechanisms. In this study, we made use of the fact that proceeds more slowly in small volumes than bulk solution investigate effects soluble additives Mg 2+ and poly(styrene sulfonate) (PSS) on early stages calcite crystals. Using a “Crystal Hotel” microfluidic device provide well‐defined, nanoliter volumes, observed crystals form via an amorphous precursor phase. Surprisingly, first formed...

We report the microfluidic fabrication of macroporous polymer microspheres via simultaneous reactions within single droplets, induced by UV irradiation. The aqueous phase reaction is decomposition H(2)O(2) to yield oxygen, whereas organic polymerization NOA 61, ethylene glycol dimethacrylate (EGDMA), and tri(propylene glycol) diacrylate (TPGDA) precursors. first used a liquid precursor encapsulate multiple number magnetic Fe(3)O(4) colloidal suspension (MCS) droplets in core-shell structure,...

This paper reviews the design and fabrication of polydimethylsiloxane (PDMS)-based conducting composites their applications in microfluidic chip fabrication. Owing to good electrical conductivity rubberlike elastic characteristics, these can be used variously soft-touch electronic packaging, planar three-dimensional circuits, in-chip electrodes. Several components fabricated with PDMS-based have been introduced, including a mixer, microheater, micropump, microdroplet controller, as well an...

With the view of enhancing functionality label-free single molecule nanopore-based detection, we have designed and developed a highly robust, mechanically stable, integrated nanopipette-microfluidic device which combines recognized advantages microfluidic systems unique properties/advantages nanopipettes. Unlike more typical planar solid-state nanopores, inherent geometrical constraints, nanopipettes can be easily positioned at any point within channel. This is advantageous, especially when...

A "crystal hotel" microfluidic device that allows crystal growth in confined volumes to be studied situ is used produce large calcite single crystals with predefined crystallographic orientation, microstructure, and shape by control of the detailed physical environment, flow, surface chemistry. This general approach can extended form technologically important, nanopatterned crystals. Control over crystallization yield particles defined sizes, morphologies, polymorphs, orientations a subject...

We show that the chemical structures of silicone oils can have an important role in giant electrorheological (GER) effect. The interaction between and solid nanoparticles is found to significantly influence ER By increasing kinematic viscosity oils, which a function siloxane chain length, sol-like, gel-like clay-like appearances constituted fluids were observed. Different functional-group-terminated also employed as dispersing media. Significant differences yield stress found. systematically...

We demonstrate a uniquely designed microfluid logic gate with universal functionality, which is capable of conducting all 16 operations in one chip, different input voltage combinations. A kind smart colloid, giant electrorheological (GER) fluid, functions as the translation media among fluidic, electronic and mechanic information, providing us capability performing large integrations either on-chip or off-chip, while hybrid circuit formed by interconnection electric components fluidic...

Go with the (segmented) flow: A gas–liquid microfluidic reactor system has been developed to study Pd-catalyzed carbonylation reactions over a range of flow regimes and reaction conditions (see picture). The segmented regime, in comparison annular flow, enables be studied longer times without buildup unwanted Pd particles. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...

The authors report the design of a prototype smart window based on phenomenon thermally induced aggregation triblock copolymer poly (ethylene oxide)–poly (propylene oxide) (EPE). Fluorescein isothiocyanate was used to label EPE and study at different temperatures. cloud point could be tuned by mixing with sodium dodecyl sulfate (SDS) varying concentration latter. light transmittance temperatures studied as function SDS concentration.

This article presents a simple and highly reliable method for preparing PDMS microfluidic double emulsion devices that employs single-step oxidative plasma treatment to both pattern the wettability of microchannels bond chips.

Abstract Point‐of‐care detection for pathogen is of critical need wide epidemic warning and medical diagnosis. In this work, we have designed developed a fully portable integrated microchip based real‐time polymerase chain reaction machine rapid detection. The instrument consists three functional components including heating, optical, electrical modules, which are into compact box. consumable material replaceable to meet various needs. Consequently, demonstrated the outstanding performance...

We use the Onsager principle to derive a two-phase continuum formulation for hydrodynamics of electrorheological (ER) fluid, consisting dielectric microspheres dispersed in an insulating liquid. Predictions theory are excellent agreement with experiments. In particular, it is shown that whereas usual configuration applied electric field being perpendicular shearing direction can lead shear thinning at high rates and thus loss ER effect, interdigitated, alternating electrodes eliminate...

A novel microfluidic pressure sensor which can be fully integrated into polydimethylsiloxane (PDMS) is reported. The produces electrical signals directly. We PDMS-based conductive composites a 30 μm thick membrane and bonded it to the microchannel side wall. response time of approximately 100 ms work within range as wide 0–100 kPa. resolution this micropressure generally 0.1 kPa but increased 0.01 at high pressures result quadratic relationship between resistance pressure. nature ensures its...

We have fabricated suspensions exhibiting the giant electrorheological (GER) effect comprising nanoparticles—multiwall carbon nanotubes (MCNTs) composite particles dispersed in silicone oil. This type of GER fluids display dramatically enhanced antisedimentation characteristic without sacrificing yield stress. The nanoparticles-nanotubes composites were by modifying coprecipitation method with MCNTs and urea-coated barium titanyl-oxylate (BTRU) nanoparticles as components. solid are denoted...