A Spike-Like Ionic Current Behavior via Graphene Nanopore

Gen Sheng Wu; Jing Jie Sha; Lei Liu; Yun Fei Chen

doi:10.4028/www.scientific.net/AMM.475-476.1351

Paper Titles

Preparation of Sorbent Loaded with Nano-CuO for Room Temperature to Remove of Hydrogen Sulfide
p.1329

Study of Anti-Friction Performance of Spherical FeS Nanoparticle
p.1334

An Easy Preparation of Hybrid SiO₂@Poly Acrylic Acid Nanoparticles
p.1340

Fighting Fires of Carbon Dioxide in the Closed Buildings
p.1344

A Spike-Like Ionic Current Behavior via Graphene Nanopore
p.1351

Exact Numerical Procedure for the Binding Energy of Hydrogen Impurities in Quantum Dots with Parabolic Confinements
p.1355

Analysis of Transmission Characteristic in Single Polarization Dual Elliptical Assistant Holes Hollow Fiber
p.1359

Steady and Transient Properties of Side-Gated Nano-Transistors
p.1363

Study on Join Fastness of Silent Chain
p.1371

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 475-476A Spike-Like Ionic Current Behavior via Graphene...

A Spike-Like Ionic Current Behavior via Graphene Nanopore

Abstract:

Ionic current characterization is critical for the application of nanopores with sub 5 nm as bio medical sensors and devices. Here, we demonstrate an eccentric ionic current behavior in graphene nanopore fabricated by high resolution transmission electron microscopy (HR-TEM). A spike-like current enhancement is shown in the absence of any bio molecule or nanoparticle in the LaCl₃ and KCl solution. By tuning the hydrophobicity of the graphene surface, the spikes diminish in the current recordings acquired in graphene nanopore after 20 seconds plasma etching. We consider that the hydrophocity-induced nanobubble is present in the nanopore area, leading to the currents change as the bubbles deformation due to the voltage driven electrostatic forces on the transported ions surrounding the bubble surface.