Microchannels schematic diagram

Figure Bl.23.10. Schematic diagram of a scattering and recoiling imaging spectrometer (SARIS). A large-area (95 X 75 nnn ), time-resolving, position-sensitive microchannel plate (MCP) detector captures a large...

Figure 18. (a) Scanning electron microscope pictures of the microchannels cut onto a porous stainless steel, (b) Schematic diagram of the multi-channel microreactor set-up [36]. 

Figure 2. Schematic diagram of the imaging apparatus with ion lens. The detector is a dual microchannel plate/phosphor screen assembly (40 mm active diameter) coupled with a CCD camera. Electric field lines are shown to illustrate the ion lens. Equipotential surfaces in the repeller/extractor region are also included.

FIGURE 6.8. (a) Schematic diagram of bilayer coated PDMS microchannels on a planar glass substrate. The bilayer coats both the glass and polymer surfaces. Protein solutions can then be injected into the channels as indicated by the arrows, (b) Epifluorescence image of a spatially addressed array of eight Egg PC bilayer coated microchannels. The channels are alternately coated with bilayers containing 1 mol% Texas Red and 3 mol% fluorescein labeled lipids. 

Fig. 2.2. Schematic diagram of a reflectron-type time-of-flight mass spectrometer and the look. The polarization of the fundamental pulse of 0.8 pm was parallel to the flight axis. Typical applied voltages for ion extraction and the microchannel plate (MCP) were 3kV and —2.1kV, respectively...

Fig. 2. Schematic diagram of the apparatus. The superconducting magnetic coils create trapping potential that confines atoms near the focus of the 243 nm laser beam. The beam is focused to a 50 pm waist radius and retro-reflected to allow for Doppler-free excitation. After excitation, fluorescence is induced by an applied electric field. A small fraction of the 122 nm fluorescence photons are counted on a microchannel plate detector. Not shown is the trapping cell which surrounds the sample and is thermally anchored to a dilution refrigerator. The actual trap is longer and narrower than indicated in the diagram...

Figure 5 Schematic diagram of an experimental set-up for the state-selective study of laser-induced desorption. KDP potassium dideuterium phosphate crystal, BBO p-barium borate crystal, MCP microchannel plate [11].

Figure 10. The schematic diagram of a crossing microchannel dispenser. and Wy indicate the width of the...

Figure C3.1.5. Schematic diagram of an intensifier-gated optical multichannel analyser (OMA) detector. The detector consists of a microchannel plate (MCP) image intensifier followed by a 1024-channel Reticon photodiode array. Light dispersed across the semitransparent photocathode ejects photoelectrons. These are accelerated toward the entrance of the microchannels by the gate pulse. The photoelectrons collide with the channel walls to produce secondary electrons, which are accelerated in turn by the MCP bias voltage to produce further collisions and electron multiplication. Electrons leaving the microchannels are further accelerated by the phosphor bias voltage.

A schematic diagram of the experimental apparatus is shown in Figure 35. The experimental apparatus has been modified from the laser-ionization TOF mass spectrometer described in Section UFA (see Fig. 22) [58,59]. A two-stage microchannel plate detector and a set of simple aperture lenses have been added for PE detection below the photoionization region and opposite to the ion TOF tube. 

FIGURE 51.1 Schematic diagram of the general processing steps involved in the fabrication of microchannel structures using sacrificial materials. 

FIGURE 51.8 Schematic diagram of using PCSLs to interface microfluidics with ion-permeable membranes, (a) APCSL-protected microchannel substrate is bonded to a PMMA cover piece having a membrane reservoir, (b) Prepolymer solution is poured into the membrane reservoir, (c) An ion-permeable hydrogel is photopolymerized. (d) The PCSL is melted and removed from the channel. (Adapted from Kelly, R. T., et al., Anal. Chem., 78, 2565, 2006. Copyright 2006. With permission from American Chemical Society.)... 

FIGURE 32.9 Schematic diagram of different emulsification processes to produce gel particles (a) mechanical stirring (b) static mixing (c) membrane emulsification and (d) microchannel emulsification. 

Droplet Dynamics in Microchannels, Fig. 3 A schematic diagram specifying the contact angles at the rear and the front ends of the advancing droplet, alraig with the other pertinent geometrical features... 

Electrokinetic Dispensing, Fig. 1 Schematic diagram of a commonly used cross-linked microchannel for elec-trokinetic dispensing... 

Integrated Microdevices for Medical Diagnostics, Fig. 2 (Left) Schematic diagram of a blood typing biochip. The device contains flow splitting microchannels, a serpentine micromixer, reaction microchambers, and detection microfilters. The reaction chamber holds 3 pi... 

Many studies have been conducted on this topic. As an example. Fig. 3 depicts the schematic diagram of the microfluidic electroporative device proposed by Wang et al. [12]. In their setup, cells start to move from sample reservoir (right-hand side) to the receiving reservoir (left-hand side). The electrodes are placed at the ends of the microchannels. In the electroporation area, geometric change and reduction of the cross-sectional area of the microchannels intensifies the applied electric field to the required electric field of electroporation. 

In a more recent study. Das and Chakraborty [9] presented analytical solutions for velocity, temperature, and concentration distribution in electroosmotic flows of non-Newtonian fluids in microchannels. A brief description of their transport model is summarized here, for the sake of completeness. A schematic diagram of the parallel plate microchannel configuration, as considered by the above authors, is depicted in Fig. 2. The bottom plate is denoted as y = H and top plate as y = +H. A potential gradient is applied along the axis of the channel, which provides the necessary driving force for electroosmotic flow. The governing equations appropriate to the physical problem are the equations for conservation... 

Non-Newtonian Fluids in MicroChannel, Fig. 2 Schematic diagram depicting a parallel plate microchannel... 

Temperature Effects on the Zeta Potential, Fig. 2 Schematic diagram of experimental setup. MicroChannel chip placed directly on a hot plate surface and platinum electrodes inserted vertically into reservoirs. Voltage drop measured across a resistor in series with the microchaimel was used to calculate current flow in the electric circuit... 

Figure 4 Schematic diagram of the microchannels of ihc Instantlmager. (Courtesy of D. Englert, Canberra Packard, Meriden, USA.)...

Lab-on-a-Chip Devices for Particle and Cell SeparaUen, Rgure 6 Principle of hydrodynamic filtration, (a) When the flow rate ratios between the side and main channels are low, (b) medium, and (c) high. Broken lines show the virtual boundaries (critical streamline) of the flows distributed into the side and main channels, (d) Schematic diagram showing particle concentration and classification in a microchannel having multiple branch points and side channels. Reprinted with permisiion from [8]... 

Temperature Gradient Focusing, Figure 2 Schematic diagram of the microchannel with a step change in cross-section... 

Figure 1.15 Advection caused by integral structures. A schematic diagram of a microchannel with square grooves in the bottom wall. Below the channel to the right, the average flow profile in the cross section is...

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