Graphene-based nano-pore monomolecular sensor and medium identification method thereof
A nanopore and graphene technology, which is applied in the field of nanofluid detection, can solve the problems affecting the resolution of the sensor, and achieve the effects of high structural stability, good toughness and strength
Inactive Publication Date: 2011-08-31
SOUTHEAST UNIV
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The invention discloses a graphene-based nano-pore monomolecular sensor and a medium identification method thereof. In the graphene-based nano-pore monomolecular sensor, conductive single-layer or multi-layer graphene is used as a radial electrode; the graphene electrode is clamped inside an insulation layer, so the structural strength is enhanced; a nano-pore channel is formed on the insulation layer; the cathode and the anode of the radial electrode are located at both ends of the nano-pore channel in the radial direction respectively; and an axial electrode is arranged along the axial direction of the nano-pore channel. During medium identification, both ends of the nano pore are connected with a fluid pool unit, and voltage is exerted between the axial electrode and the radial electrode respectively; and when a medium passes through the nano pore, the medium in the channel is identified by measuring weak change of axial and radial current. The sensor has a simple structure; meanwhile, by comprehensive analysis of the radial current and the axial current, higher sensitivity and identification rate can be obtained; moreover, due to analysis, the pore-passing medium can be detected and the pore-passing state is analyzed according to the tested medium; therefore, the property of the medium can be analyzed.
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Property | Measurement | Unit |
Diameter | 1.0 ~ 100.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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