Patent
US 9,365,429GRAPHENE SCREENING AND SEPARATION METHOD AND DEVICE
TAI-HSIN HSU, WEN-BIN JIAN
2016-06-14·US
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Patent
Atlas literature
Patent
US 9,365,429Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene screening and separation method, comprising: providing at least one pair of electrodes and an energy barrier layer, wherein the pair of 5 electrodes is a first electrode and a second electrode, and the energy barrier layer is formed on the first electrode; covering the pair of electrodes and the energy barrier layer with a graphene suspension; changing a bias voltage between the first electrode and the second electrode of the pair of electrodes and measuring a corresponding tunneling current when a graphene sheet in 10 the graphene suspension materially couples the second electrode and the energy barrier layer and is located above the first electrode; and performing screening and separation by using differential conductance of different layers of graphene.
The graphene screening and separation method of claim 1, wherein the differential conductance is a derivative of the tunneling current with respect to the bias voltage.
The graphene screening and separation method of claim 1, wherein the energy barrier layer is made by a metal oxide.
10 10. A graphene screening and separation device, comprising: at least one pair of electrodes, wherein each pair of electrodes consists of a first electrode and a second electrode; at least one energy barrier layer formed on the first electrode; and a measurement unit comprised of a voltage source and a nanoamp current meter 15 electrically coupled to the first and second electrodes of the pair of electrodes, wherein when a graphene sheet in a graphene suspension covers the second electrode and the energy barrier layer and is located above the first electrode, a corresponding tunneling current is measured according to a bias voltage between the first electrode and the second electrode of the pair of electrodes.
20 11. The graphene screening and separation device of claim 10, wherein the pair of electrodes is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein each pair of 25 electrodes is electrically coupled to a time-varying voltage source, so as to form dielectrophoretic force between the first electrode and the second electrode of the pair of electrodes, so that the graphene sheet of the graphene suspension materially couples the 10 second electrode and the energy barrier layer and is located above the first electrode.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is a metal oxide.
Layer stacks claimed or described, ordered top of device to substrate.
graphene screening and separation device
Materials described outside the worked examples.
graphene
graphene suspension
Patent
Atlas literature
Patent
US 9,365,429Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene screening and separation method, comprising: providing at least one pair of electrodes and an energy barrier layer, wherein the pair of 5 electrodes is a first electrode and a second electrode, and the energy barrier layer is formed on the first electrode; covering the pair of electrodes and the energy barrier layer with a graphene suspension; changing a bias voltage between the first electrode and the second electrode of the pair of electrodes and measuring a corresponding tunneling current when a graphene sheet in 10 the graphene suspension materially couples the second electrode and the energy barrier layer and is located above the first electrode; and performing screening and separation by using differential conductance of different layers of graphene.
The graphene screening and separation method of claim 1, wherein the differential conductance is a derivative of the tunneling current with respect to the bias voltage.
The graphene screening and separation method of claim 1, wherein the energy barrier layer is made by a metal oxide.
10 10. A graphene screening and separation device, comprising: at least one pair of electrodes, wherein each pair of electrodes consists of a first electrode and a second electrode; at least one energy barrier layer formed on the first electrode; and a measurement unit comprised of a voltage source and a nanoamp current meter 15 electrically coupled to the first and second electrodes of the pair of electrodes, wherein when a graphene sheet in a graphene suspension covers the second electrode and the energy barrier layer and is located above the first electrode, a corresponding tunneling current is measured according to a bias voltage between the first electrode and the second electrode of the pair of electrodes.
20 11. The graphene screening and separation device of claim 10, wherein the pair of electrodes is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein each pair of 25 electrodes is electrically coupled to a time-varying voltage source, so as to form dielectrophoretic force between the first electrode and the second electrode of the pair of electrodes, so that the graphene sheet of the graphene suspension materially couples the 10 second electrode and the energy barrier layer and is located above the first electrode.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is a metal oxide.
Layer stacks claimed or described, ordered top of device to substrate.
graphene screening and separation device
Materials described outside the worked examples.
graphene
graphene suspension
Patent
Atlas literature
Patent
US 9,365,429Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene screening and separation method, comprising: providing at least one pair of electrodes and an energy barrier layer, wherein the pair of 5 electrodes is a first electrode and a second electrode, and the energy barrier layer is formed on the first electrode; covering the pair of electrodes and the energy barrier layer with a graphene suspension; changing a bias voltage between the first electrode and the second electrode of the pair of electrodes and measuring a corresponding tunneling current when a graphene sheet in 10 the graphene suspension materially couples the second electrode and the energy barrier layer and is located above the first electrode; and performing screening and separation by using differential conductance of different layers of graphene.
The graphene screening and separation method of claim 1, wherein the differential conductance is a derivative of the tunneling current with respect to the bias voltage.
The graphene screening and separation method of claim 1, wherein the energy barrier layer is made by a metal oxide.
10 10. A graphene screening and separation device, comprising: at least one pair of electrodes, wherein each pair of electrodes consists of a first electrode and a second electrode; at least one energy barrier layer formed on the first electrode; and a measurement unit comprised of a voltage source and a nanoamp current meter 15 electrically coupled to the first and second electrodes of the pair of electrodes, wherein when a graphene sheet in a graphene suspension covers the second electrode and the energy barrier layer and is located above the first electrode, a corresponding tunneling current is measured according to a bias voltage between the first electrode and the second electrode of the pair of electrodes.
20 11. The graphene screening and separation device of claim 10, wherein the pair of electrodes is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein each pair of 25 electrodes is electrically coupled to a time-varying voltage source, so as to form dielectrophoretic force between the first electrode and the second electrode of the pair of electrodes, so that the graphene sheet of the graphene suspension materially couples the 10 second electrode and the energy barrier layer and is located above the first electrode.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is a metal oxide.
Layer stacks claimed or described, ordered top of device to substrate.
graphene screening and separation device
Materials described outside the worked examples.
graphene
graphene suspension
Patent
Atlas literature
Patent
US 9,365,429Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene screening and separation method, comprising: providing at least one pair of electrodes and an energy barrier layer, wherein the pair of 5 electrodes is a first electrode and a second electrode, and the energy barrier layer is formed on the first electrode; covering the pair of electrodes and the energy barrier layer with a graphene suspension; changing a bias voltage between the first electrode and the second electrode of the pair of electrodes and measuring a corresponding tunneling current when a graphene sheet in 10 the graphene suspension materially couples the second electrode and the energy barrier layer and is located above the first electrode; and performing screening and separation by using differential conductance of different layers of graphene.
The graphene screening and separation method of claim 1, wherein the differential conductance is a derivative of the tunneling current with respect to the bias voltage.
The graphene screening and separation method of claim 1, wherein the energy barrier layer is made by a metal oxide.
10 10. A graphene screening and separation device, comprising: at least one pair of electrodes, wherein each pair of electrodes consists of a first electrode and a second electrode; at least one energy barrier layer formed on the first electrode; and a measurement unit comprised of a voltage source and a nanoamp current meter 15 electrically coupled to the first and second electrodes of the pair of electrodes, wherein when a graphene sheet in a graphene suspension covers the second electrode and the energy barrier layer and is located above the first electrode, a corresponding tunneling current is measured according to a bias voltage between the first electrode and the second electrode of the pair of electrodes.
20 11. The graphene screening and separation device of claim 10, wherein the pair of electrodes is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is covered by the graphene suspension.
The graphene screening and separation device of claim 10, wherein each pair of 25 electrodes is electrically coupled to a time-varying voltage source, so as to form dielectrophoretic force between the first electrode and the second electrode of the pair of electrodes, so that the graphene sheet of the graphene suspension materially couples the 10 second electrode and the energy barrier layer and is located above the first electrode.
The graphene screening and separation device of claim 10, wherein the energy barrier layer is a metal oxide.
Layer stacks claimed or described, ordered top of device to substrate.
graphene screening and separation device
Materials described outside the worked examples.
graphene
graphene suspension
metal oxide
aluminum oxide
Al₂O₃
metal oxide
aluminum oxide
Al₂O₃
metal oxide
aluminum oxide
Al₂O₃
metal oxide
aluminum oxide
Al₂O₃