Abstract: A method of preparing a graphene-based membrane is provided. The method may include providing a stacked arrangement of layers of a graphene-based material, wherein the layers of the graphene-based material define one or more nanochannels between neighboring layers, and varying an electrical charge on a surface of the layers of the graphene-based material defining the one or more nanochannels to control size selectivity and/or ionic selectivity of the graphene-based membrane. A graphene-based membrane and a method of separating ions from a fluid stream are also provided.

Abstract: There is provided a multi-layered membrane comprising a top layer, a bottom layer, and a spacer layer; wherein said spacer layer is interposed between said top layer and said bottom layer; wherein said top layer, said bottom layer and said spacer layer are each independently composed of one or more selective layers, each selective layer comprising a 2D material; wherein said spacer layer comprises at least one channel for receiving a fluid; wherein said bottom layer comprises a hole with an area in the range of 1 ?m2 to 1 mm2; and wherein said hole is capable of being in fluid communication with said at least one channels of said spacer layer. There is also provided a method to synthesize the top layer of a multi-layered membrane as disclosed herein, methods for separating a plurality of ions or molecules in a fluid stream, a device comprising a multi-layered membrane as disclosed herein, and use of the method or the device as disclosed herein in osmotic power generation.

Abstract: A method of preparing a graphene-based membrane is provided. The method may include providing a stacked arrangement of layers of a graphene-based material, wherein the layers of the graphene-based material define one or more nanochannels between neighboring layers, and varying an electrical charge on a surface of the layers of the graphene-based material defining the one or more nanochannels to control size selectivity and/or ionic selectivity of the graphene-based membrane. A graphene-based membrane and a method of separating ions from a fluid stream are also provided.

Abstract: Provided herein is a nanopore sensor, including a self-supported solid state material selected from hexagonal-BN, a mono-atomic glass, MoS2, WS2, MoSe2, MoTe2, TaSe2, NbSe2, NiTe2, Bi2Sr2CaCu2Ox, and Bi2Te3, having a thickness less than about 5 nm. A nanopore extends through the material thickness. A connection from the first material surface to a first reservoir provides, at the first material surface, a species in an ionic solution from the first reservoir to the nanopore, and a connection from the second material surface to a second reservoir collects in the second reservoir the species and ionic solution after translocation of the species and ionic solution through the nanopore. An electrical circuit is connected with the nanopore, through the material thickness, from the first reservoir to the second reservoir, to monitor translocation of species in the ionic solution through the nanopore in the solid state material.

Abstract: There is provided a substantially bare, self-supported single-layer graphene membrane including a nanopore extending through a thickness of the graphene membrane from a first to a second membrane surface opposite the first graphene membrane surface. A connection from the first graphene membrane surface to a first reservoir provides, at the first graphene membrane surface, a species in an ionic solution to the nanopore, and a connection from the second graphene membrane surface to a second reservoir is provided to collect the species and ionic solution after translocation of the species and ionic solution through the nanopore from the first graphene membrane surface to the second graphene membrane surface. An electrical circuit is connected on opposite sides of the nanopore to measure flow of ionic current through the nanopore in the graphene membrane.

Abstract: The invention features the use of graphene, a one atom thick planar sheet of bonded carbon atoms, in the formation of artificial lipid membranes. The invention also features the use of these membranes to detect the properties of polymers (e.g., the sequence of a nucleic acid) and identify transmembrane protein-interacting compounds.

Abstract: A method of preparing a graphene-based membrane is provided. The method may include providing a stacked arrangement of layers of a graphene-based material, wherein the layers of the graphene-based material define one or more nanochannels between neighboring layers, and varying an electrical charge on a surface of the layers of the graphene-based material defining the one or more nanochannels to control size selectivity and/or ionic selectivity of the graphene-based membrane. A graphene-based membrane and a method of separating ions from a fluid stream are also provided.

Abstract: The invention features the use of graphene, a one atom thick planar sheet of bonded carbon atoms, in the formation of artificial lipid membranes. The invention also features the use of these membranes to detect the properties of polymers (e.g., the sequence of a nucleic acid) and identify transmembrane protein-interacting compounds.

Abstract: The invention features the use of graphene, a one atom thick planar sheet of bonded carbon atoms, in the formation of artificial lipid membranes. The invention also features the use of these membranes to detect the properties of polymers (e.g., the sequence of a nucleic acid) and identify transmembrane protein-interacting compounds.

Abstract: In a process for fabricating a nanopore device, at least one carbon nanotube catalyst region is formed on a structure. A plurality of nanopores is formed in the structure at a distance from the catalyst region that is no greater than about an expected length for a carbon nanotube synthesized from the catalyst region. Then at least one carbon nanotube is synthesized from the catalyst region. This fabrication sequence enables the in situ synthesis of carbon nanotubes at the site of nanopores, whereby one or more nanotubes articulate one or more nanopores without requiring manual positioning of the nanotubes.

Abstract: The invention features the use of graphene, a one atom thick planar sheet of bonded carbon atoms, in the formation of artificial lipid membranes. The invention also features the use of these membranes to detect the properties of polymers (e.g., the sequence of a nucleic acid) and identify transmembrane protein-interacting compounds.

Abstract: There is provided a substantially bare, self-supported single-layer graphene membrane including a nanopore extending through a thickness of the graphene membrane from a first to a second membrane surface opposite the first graphene membrane surface. A connection from the first graphene membrane surface to a first reservoir provides, at the first graphene membrane surface, a species in an ionic solution to the nanopore, and a connection from the second graphene membrane surface to a second reservoir is provided to collect the species and ionic solution after translocation of the species and ionic solution through the nanopore from the first graphene membrane surface to the second graphene membrane surface. An electrical circuit is connected on opposite sides of the nanopore to measure flow of ionic current through the nanopore in the graphene membrane.

Abstract: In a process for fabricating a nanopore device, at least one carbon nanotube catalyst region is formed on a structure. A plurality of nanopores is formed in the structure at a distance from the catalyst region that is no greater than about an expected length for a carbon nanotube synthesized from the catalyst region. Then at least one carbon nanotube is synthesized from the catalyst region. This fabrication sequence enables the in situ synthesis of carbon nanotubes at the site of nanopores, whereby one or more nanotubes articulate one or more nanopores without requiring manual positioning of the nanotubes.