CAJ | 학술논문

用荷能重离子径迹刻蚀的方法在高分子多聚物膜(PET)上制备出单锥形纳米孔.刻蚀过程通过监测跨膜电流来控制,最大刻蚀电流Imax不同,得到的锥形孔小孔孔径也不同.研究单锥形纳米孔在KCl溶液中的I-V 曲线发现,单锥形纳米孔的离子传导呈现出不对称特性,该现象称为整流效应,整流系数γ大小随纳米小孔孔径大小和电解质溶液浓度而变化.
용하능중리자경적각식적방법재고분자다취물막(PET)상제비출단추형납미공.각식과정통과감측과막전류래공제,최대각식전류Imax불동,득도적추형공소공공경야불동.연구단추형납미공재KCl용액중적I-V 곡선발현,단추형납미공적리자전도정현출불대칭특성,해현상칭위정류효응,정류계수γ대소수납미소공공경대소화전해질용액농도이변화.
Single conical nanopores were fabricated by etching single-ion-irradiated polymer (ethylene terephthalate) (PET) films. The etching process was monitored by measuring the transmembrane current. A series of conical nanopores with different tip sizes were obtained at different maximum etching currents,“Imax”. Results showed that it was possible to control the tip diameter by terminating etching at a certain Imax. The current–voltage characteristic of the nanopores in KCl solution was investigated. Results showed also that the ionic conduction was asymmetrical, this phenomenon is called rectification. The current rectification coefficient, was influenced by the tip size and electrolyte concentration.