Pouthas F, Gentil C, Côte D, Zeck G, Straub B, Bockelmann U
Laboratoire Pierre Aigrain, Département de Physique de l'Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Sep;70(3 Pt 1):031906. doi: 10.1103/PhysRevE.70.031906. Epub 2004 Sep 21.
An integrated array of field-effect transistor structures is used to detect two oppositely charged biopolymers: poly(L-lysine) and DNA. Local deposition of polymer solutions on part of the array induces sizeable variations in the dc current-voltage characteristics of the transistors exposed to the molecular charge. The whole transistor array is measured in the presence of a common electrolyte. Differential signals are studied as a function of electrolyte salt and polymer concentrations. The measurements provide information on the interface electrostatic potentials of the (semiconductor/biopolymer/electrolyte) system and the experimental data are compared to an analytical model which accounts for screening of the adsorbed charge by mobile ions.
聚（L-赖氨酸）和DNA。聚合物溶液在阵列的一部分上的局部沉积会导致暴露于分子电荷的晶体管的直流电流-电压特性发生显著变化。整个晶体管阵列在存在共同电解质的情况下进行测量。研究了差分信号作为电解质盐和聚合物浓度的函数。这些测量提供了关于（半导体/生物聚合物/电解质）系统界面静电势的信息，并将实验数据与考虑了移动离子对吸附电荷屏蔽作用的分析模型进行了比较。
