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This paper aimed to develop a pendant liposome system that allows the access to both internal and external solutions of the formed liposomes. The access to the internal solution was achieved by a through-hole fabricated on the substrate, which was designed underneath the pendant-like, dome-shaped liposome. The formation of a uniform-size liposome array was based on our previous works that applied...
This paper describes a contactless manipulation system for giant liposomes in an aqueous flow by negative dielectrophoresis (nDEP). The system consists of 2 pairs of comb electrodes that face each other across a perpendicular channel. This design allows an nDEP force to be focused at the center of the gap of the electrodes and the liposomes to align in lines without contacting either the electrodes...
This paper describes the preparation of a cell-sized vesicle containing small vesicles from a two-planar lipid bilayer in a triple-well device using a pulsed jet flow. First, the size distribution of the cell-sized vesicles is estimated using a double-well device wherein a separator having a hole diameter of 100, 200, or 500 μm is mounted between the wells. Moreover, the small vesicles are successfully...
This paper describes microfluidic logic gates which use DNA and biological nanopores. Single-stranded DNA (ssDNA) can pass through αHL, a biological nanopore, incorporated in bilayer lipid membranes (BLMs), whereas double-stranded DNA (dsDNA) cannot. In this study, these passing and non-passing phenomena were applied as the binary system and logic gates. Two types of ssDNA were used as inputs, while...
This paper describes simultaneou us 16 channels ion-channel recordings through membrane proteins reconstituted in bilayer lipid membrannes (BLMs) as shown in Figure 1. Although multiple ion-channel recording is necessary for high-throughput screening (HTS) of drug [1], there are no reports of such systems as far as the authors are aware. We have developed several strategies to construct BLMs arrray...
This paper describes a methodology that realizes uniformly-sized liposome arrays with gentle hydration. The system consists of a dried lipid pattern on a substrate that is a micropatterned polymer thin film on an indium-tin-oxide (ITO) glass slide. An electrospray deposition (ESD) method was applied to obtain the lipid patterning at the polymer pattern where the ITO surface was exposed. With a simple...
This letter describes the integration of an electrical connection onto a lipid bilayer membrane microchip for the electrical detection/regulation of transmembrane phenomena together with fluorescence monitoring. Arrayed microchambers with a volume of 3 pL were fabricated within a poly(dimethyl siloxane) microfluidic device, and electrical access was achieved by designing channels adjacent to the chambers...
This paper describes a microfluidic device for a high through-put ion channel recordings, in which planar bilayer lipid membranes (BLMs) are spanning across a nanometer-sized poly(p-xylylene) (parylene) pore (Figure 1). To make the nanopore, a micrometer-sized pore of parylene was prepared by photolithography, and then parylene was additionally deposited on to the micropore with the isotropic vaporization...
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