Detection of DNA homopolymer with graphene nanopore

2019 ◽  
Vol 37 (6) ◽  
pp. 061809
Author(s):  
Lei Zhou ◽  
Kun Li ◽  
Zhongwu Li ◽  
Pinyao He ◽  
Kabin Lin ◽  
...  
Keyword(s):  
Graphene Nanopore

Translocation of alkane through graphene nanopore: A molecular dynamics simulation study

2014 ◽  
Vol 89 (2) ◽  
pp. 302-308 ◽  
Author(s):  
Jun-Yin Li ◽  
Hua Yang ◽  
Yan-Zhen Sheng ◽  
Xin-Ting Zhao ◽  
Miao Sun
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Simulation Study ◽  
Dynamics Simulation ◽  
Graphene Nanopore

Revealing Mechanical Strength of Nanopores Using Atomic Finite Element Techniques

2018 ◽  
Vol 934 ◽  
pp. 24-29
Author(s):  
Prapasiri Pongprayoon ◽  
Attaphon Chaimanatsakun
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Fluid Flow ◽  
Mechanical Strength ◽  
Impact Force ◽  
Pore Surface ◽  
Vertical Rectangle ◽  
The Impact ◽  
Graphene Nanopore

Graphene nanopore has been widely employed in nanofilter or nanopore devices due to its outstanding properties. The understanding of its mechanical properties at nanoscale is crucial for device improvement. In this work, the mechanical properties of graphene nanopore is thus investigated using atomistic finite element method (AFEM). Four graphene models with different pore shapes (circular (CR), horizontal rectangle (RH), and vertical rectangle (RV)) in sub-nm size which could be successfully fabricated experimentally have been studied here. The force normal to a pore surface is applied to mimic the impact force due to a fluid flow. Increasing pore size results in the reduction in its strength. Comparing among different pore shapes with comparable sizes, the order of pore strength is CR>RH>RV>SQ. In addition, we observe that the direction of pore alignment and geometries of pore edge also play a key role in mechanical strength of nanopores.

scholarly journals Spatial blockage of ionic current for electrophoretic translocation of DNA through a graphene nanopore

2014 ◽  
Vol 35 (8) ◽  
pp. 1144-1151 ◽  
Author(s):  
Wenping Lv ◽  
Shengju Liu ◽  
Xin Li ◽  
Ren'an Wu
Keyword(s):  
Ionic Current ◽  
Graphene Nanopore

Erratum: Ferromagnetism in Hydrogenated Graphene Nanopore Arrays [Phys. Rev. Lett.107, 217203 (2011)]

2012 ◽  
Vol 108 (11) ◽  
Author(s):  
K. Tada ◽  
J. Haruyama ◽  
H. X. Yang ◽  
M. Chshiev ◽  
T. Matsui ◽  
...  
Keyword(s):  
Hydrogenated Graphene ◽  
Nanopore Arrays ◽  
Graphene Nanopore

scholarly journals Graphene Nanopore with Self-Aligned Plasmonic Optical Antenna

2014 ◽  
Vol 106 (2) ◽  
pp. 414a ◽  
Author(s):  
SungWoo Nam ◽  
Inhee Choi ◽  
Chi-cheng Fu ◽  
Kwanpyo Kim ◽  
SoonGweon Hong ◽  
...  
Keyword(s):  
Optical Antenna ◽  
Graphene Nanopore

scholarly journals Noise Analysis of Monolayer Graphene Nanopores

2018 ◽  
Vol 19 (9) ◽  
pp. 2639 ◽  
Author(s):  
Zi-Yin Zhang ◽  
Yun-Sheng Deng ◽  
Hai-Bing Tian ◽  
Han Yan ◽  
Hong-Liang Cui ◽  
...  
Keyword(s):  
Noise Level ◽  
Noise Analysis ◽  
Low Frequency ◽  
Monolayer Graphene ◽  
Frequency Noise ◽  
Membrane Thickness ◽  
Free Standing ◽  
Suspended Graphene ◽  
Noise Characteristics ◽  
Graphene Nanopore

Graphene-based nanopore devices have shown tantalizing potential in single molecule detection for their monoatomic membrane thickness which is roughly equal to the gap between nucleobases. However, high noise level hampers applications of graphene nanopore sensors, especially at low frequencies. In this article, we report on a study of the contribution of suspended graphene area to noise level in full frequency band. Monolayer graphene films are transferred onto SiNx substrates preset with holes in varied diameters and formed self-supported films. After that, the films are perforated with smaller, nanoscale holes. Experimental studies indicate a dependency of low-frequency 1/f noise on the underlying SiNx geometry. The contribution of the suspended graphene area to capacitance which affects the noise level in the high frequency range reveals that the graphene free-standing film area influences noise level over a wide frequency region. In addition, the low-frequency noise demonstrates a weak dependency on salt concentration, in deviation from Hooge’s relation. These findings and attendant analysis provide a systematic understanding of the noise characteristics and can serve as a guide to designing free-standing monolayer graphene nanopore devices.

scholarly journals Step-defect guided delivery of DNA to a graphene nanopore

2019 ◽  
Vol 14 (9) ◽  
pp. 858-865 ◽  
Author(s):  
Manish Shankla ◽  
Aleksei Aksimentiev
Keyword(s):  
Step Defect ◽  
Graphene Nanopore

A Spike-Like Ionic Current Behavior via Graphene Nanopore

2013 ◽  
Vol 475-476 ◽  
pp. 1351-1354
Author(s):  
Gen Sheng Wu ◽  
Jing Jie Sha ◽  
Lei Liu ◽  
Yun Fei Chen
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Plasma Etching ◽  
Ionic Current ◽  
Bubble Surface ◽  
Graphene Surface ◽  
Transmission Electron ◽  
Medical Sensors ◽  
Current Behavior ◽  
Graphene Nanopore

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 LaCl3and 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.

scholarly journals Stabilization of graphene nanopore

2014 ◽  
Vol 111 (21) ◽  
pp. 7522-7526 ◽  
Author(s):  
J. Lee ◽  
Z. Yang ◽  
W. Zhou ◽  
S. J. Pennycook ◽  
S. T. Pantelides ◽  
...  
Keyword(s):  
Graphene Nanopore
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