Photogating of ionic currents across a lipid bilayer.
Photogating of ionic currents across a lipid bilayer.
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跨脂质双层的离子电流的光门控。
DOI：
10.1073/pnas.86.18.6959
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发表时间：
1989
影响因子：
11.1
通讯作者：
Mauzerall,D
中科院分区：
文献类型：
--
作者：
Drain,CM;Christensen,B;Mauzerall,D
金属卟啉阳离子在脂质双层中的光形成增加了负离子的离子电流，降低了正疏水离子的离子电流。在低浓度的移动的疏水离子，观察到的电导率的30%的变化，随着正四苯基鏻离子的浓度增加而降低，并随着负四苯基硼化物离子的浓度增加而急剧增加。在硼化物离子饱和电导区，电导率增加了3.6倍。质子载体羰基氰化物3-氯苯腙可使其增加15倍。在这种情况下，门控的净电荷比双层膜中的光生电荷大300倍。因此，在该有机场效应光电晶体管中存在净增益。门控也可以通过连续光或化学氧化剂来实现。光门被解释为双层内部的空间电荷效应。
Photoformation of metalloporphyrin cations in a lipid bilayer increases the ionic currents of negative and decreases those of positive hydrophobic ions. At low concentrations of the mobile hydrophobic ion, a 30% change in conductivity is observed that decreases with increasing concentration of positive tetraphenylphosphonium ion and increases drastically with increasing concentration of negative tetraphenylboride ion. In the region of saturated conductance of boride ion, the increase in conductivity is 3.6-fold. A 15-fold increase is observed with the protonophore carbonyl cyanide 3-chlorophenylhydrazone. In this case the net charge gated is 300 times greater than the photogenerated charge in the bilayer membrane. Thus there is a net gain in this organic field effect phototransistor. The gating can also be accomplished by continuous light or chemical oxidants. Photogating is explained as space charge effects inside the bilayer.