King G M, Golovchenko J A
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2005 Nov 18;95(21):216103. doi: 10.1103/PhysRevLett.95.216103.
We demonstrate a new nanoscale system consisting of a nanotube threaded through a nanopore in aqueous solution. Its electrical and mechanical properties are sensitive to experimentally controllable conformational changes on sub-Angstrom length scales. Ionic current transport through a nanopore is significantly suppressed by the threading nanotube and the mechanical interactions between the nanotube and pore are accounted for by a folding geometry. The experiments provide first measurements of the longitudinal resolution and metrology of a solid-state nanopore "microscope." This new nanostructure provides a means to study molecule-nanotube interactions in conducting ionic solutions as well as geometrical and surface properties of nanopores and nanotubes.
我们展示了一种新的纳米级系统，该系统由一根穿过水溶液中纳米孔的纳米管组成。其电学和力学性质对亚埃长度尺度上实验可控的构象变化敏感。穿过纳米孔的离子电流传输受到穿入的纳米管的显著抑制，并且纳米管与孔之间的力学相互作用由折叠几何结构来解释。这些实验首次测量了固态纳米孔“显微镜”的纵向分辨率和计量学。这种新的纳米结构提供了一种手段，用于研究导电离子溶液中的分子 - 纳米管相互作用以及纳米孔和纳米管的几何和表面性质。
