TY - JOUR
T1 - Membrane oscillator as chemical sensor - Part 2
T2 - Stable potential oscillation of lipid membrane across a micropore
AU - Sha, Seimei
AU - Moriizumi, Toyosaka
PY - 1993/3/1
Y1 - 1993/3/1
N2 - A rhythmic, sustained, stable potential oscillation was reproducibly observed for a lipid membrane supported by a micropore of a thin membrane tip micropipet. Amplitude and period of the oscillation voltage were controlled by changing the pore diameter. The smaller the hole diameter, the smaller the amplitude and the period became. We call this relationship "size effect." We observed with an optical microscope dynamic behavior of lipids across the oil/water interface, which are formed at a micropore of 2 μm in diameter during self-excited potential oscillation. Periodical movement of a dome-shaped body on the interface is observed, and its expansion and shrinkage are quite synchronous with the potential oscillation. We also applied this self-excited potential oscillation device as a chemical sensor, and reported the effect of chemical substance added into the water phase as a model for the biological chemoreceptive membrane. The experimental results of microscopic observation show that the sensing system using the micropore can distinguish different chemical substances as well as their concentrations, suggesting its application as a chemical sensor.
AB - A rhythmic, sustained, stable potential oscillation was reproducibly observed for a lipid membrane supported by a micropore of a thin membrane tip micropipet. Amplitude and period of the oscillation voltage were controlled by changing the pore diameter. The smaller the hole diameter, the smaller the amplitude and the period became. We call this relationship "size effect." We observed with an optical microscope dynamic behavior of lipids across the oil/water interface, which are formed at a micropore of 2 μm in diameter during self-excited potential oscillation. Periodical movement of a dome-shaped body on the interface is observed, and its expansion and shrinkage are quite synchronous with the potential oscillation. We also applied this self-excited potential oscillation device as a chemical sensor, and reported the effect of chemical substance added into the water phase as a model for the biological chemoreceptive membrane. The experimental results of microscopic observation show that the sensing system using the micropore can distinguish different chemical substances as well as their concentrations, suggesting its application as a chemical sensor.
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U2 - 10.1007/BF02916402
DO - 10.1007/BF02916402
M3 - Article
AN - SCOPUS:33750933262
VL - 38
SP - 213
EP - 231
JO - Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
JF - Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
SN - 0273-2289
IS - 3
ER -