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59 results about "Molecular electronics" patented technology
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Molecular electronics is the study and application of molecular building blocks for the fabrication of electronic components. It is an interdisciplinary area that spans physics, chemistry, and materials science. The unifying feature is use of molecular building blocks to fabricate electronic components. Due to the prospect of size reduction in electronics offered by molecular-level control of properties, molecular electronics has generated much excitement. It provides a potential means to extend Moore's Law beyond the foreseen limits of small-scale conventional silicon integrated circuits.
Method for purification of as-produced single-wall carbon nanotubes
InactiveUS20020127169A1High yieldNanostructure manufactureSpecial paperSolar cellSingle-Walled Nanotube
A method for purifying a mixture comprising single-wall carbon nanotubes and amorphous carbon contaminate is disclosed. The method includes the steps of heating the mixture under oxidizing conditions sufficient to remove the amorphous carbon, followed by recovering a product comprising at least about 80% by weight of single-wall carbon nanotubes. A method for producing tubular carbon molecules of about 5 to 500 nm in length is also disclosed. The method includes the steps of cutting single-wall nanotube containing-material to form a mixture of tubular carbon molecules having lengths in the range of 5-500 nm and isolating a fraction of the molecules having substantially equal lengths. The nanotubes may be used, singularly or in multiples, in power transmission cables, in solar cells, in batteries, as antennas, as molecular electronics, as probes and manipulators, and in composites.
Owner:RICE UNIV
Continuous fiber of single-wall carbon nanotubes
InactiveUS20020127162A1High yieldCarbon compoundsElectrolytic capacitorsFiberElectric power transmission
A method for purifying a mixture comprising single-wall carbon nanotubes and amorphous carbon contaminate is disclosed. The method includes the steps of heating the mixture under oxidizing conditions sufficient to remove the amorphous carbon, followed by recovering a product comprising at least about 80% by weight of single-wall carbon nanotubes. A method for producing tubular carbon molecules of about 5 to 500 nm in length is also disclosed. The method includes the steps of cutting single-wall nanotube containing-material to form a mixture of tubular carbon molecules having lengths in the range of 5-500 nm and isolating a fraction of the molecules having substantially equal lengths The nanotubes may be used, singularly or in multiples, in power transmission cables, in solar cells, in batteries, as antennas, as molecular electronics, as probes and manipulators, and in composites.
Owner:RICE UNIV
Boron-Doped Single-Walled Nanotubes(SWCNT)
InactiveUS20100219383A1Improve electricityImprove thermal conductivityMaterial nanotechnologyLiquid surface applicatorsFiberElectric power transmission
The present invention generally relates to methods and apparatus for the synthesis or preparation of boron-doped single-walled carbon nanotubes (B-SWCNTs). The invention provides a high yield, single step method for producing large quantities of continuous macroscopic carbon fiber from single-wall carbon nanotubes using inexpensive carbon feedstocks wherein the carbon nanotubes are produced by in situ boron substitutional doping. In one embodiment, the nanotubes disclosed are used, singularly or in multiples, in power transmission cables, in solar cells, in batteries, as antennas, as molecular electronics, as probes and manipulators, and in composites. It is another object of this invention to provide macroscopic carbon fiber made by such a method.
Owner:EKLUND PETER C
Array-based architecture for molecular electronics
InactiveUS7073157B2Solve insufficient capacityNanoinformaticsSolid-state devicesSignal routingMolecular electronics
An architecture for nanoscale electronics is disclosed. The architecture comprises arrays of crossed nanoscale wires having selectively programmable crosspoints. Nanoscale wires of one array are shared by other arrays, thus providing signal propagation between the arrays. Nanoscale signal restoration elements are also provided, allowing an output of a first array to be used as an input to a second array. Signal restoration occurs without routing of the signal to non-nanoscale wires.
Owner:CALIFORNIA INST OF TECH +1
Method of forming one or more nanopores for aligning molecules for molecular electronics
InactiveUS20030116531A1Less sensitiveDecorative surface effectsNanoinformaticsMolecular arrayMolecular electronics
A technique is provided for forming a molecule or an array of molecules having a defined orientation relative to the substrate or for forming a mold for deposition of a material therein. The array of molecules is formed by dispersing them in an array of small, aligned holes (nanopores), or mold, in a substrate. Typically, the material in which the nanopores are formed is insulating. The underlying substrate may be either conducting or insulating. For electronic device applications, the substrate is, in general, electrically conducting and may be exposed at the bottom of the pores so that one end of the molecule in the nanopore makes electrical contact to the substrate. A substrate such as a single-crystal silicon wafer is especially convenient because many of the process steps to form the molecular array can use techniques well developed for semiconductor device and integrated-circuit fabrication.
Owner:HEWLETT PACKARD DEV CO LP
Sensing devices from molecular electronic devices utilizing hexabenzocoronenes
InactiveUS20090027036A1Bridging the gapCurrent/voltage measurementMicrobiological testing/measurementLithographic artistSelf-assembled monolayer
Owner:THE TRUSTEES OF COLUMBIA UNIV IN THE CITY OF NEW YORK
Dynamic Lab on a Chip Based Point-Of-Care Device For Analysis of Pluripotent Stem Cells, Tumor Cells, Drug Metabolites, Immunological Response, Glucose Monitoring, Hospital Based Infectious Diseases, and Drone Delivery Point-of-Care Systems
The invention provides for a novel dynamically configurable point-of-care device for clinical diagnostics and research for analysis of activity associated with pluripotent stem cells, tumor cells, drug metabolites, immunological response, glucose monitoring, cardiovascular diseases, liver cell therapy, cell-cell signaling, epidemic outbreaks, hospital based infectious diseases, pathogens, germ cells, pharmacological compounds, oxidation reduction, microscopy, tomography, flow cytometry, clinical lab testing, and for providing immunoassays, ELISA, electrophoresis, PCR, chromatography, and other laboratory functions. The device comprises a biochemical processing module further comprising a processor and at least one controller, receiving microfluidic elements, sensors, software scripts, an electrically operated interface, flow ports, a user interface, memory, and a communications link, configurable based on analysis of patient data. The invention further provides for multiple-criteria decision analysis for hospital administrators, a wearable device, mobile medical device, molecular electronics configuration, touchscreen recognition, data analytics application, and a drone delivery based point-of-care system.
Owner:PATEL NILESH
Sensing devices from molecular electronic devices
InactiveUS20090017571A1Bridging the gapMicrobiological testing/measurementNanoinformaticsLithographic artistSelf-assembled monolayer
The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnecting a cut SWNT is used as a sensor to detect a biological binding event.
Owner:THE TRUSTEES OF COLUMBIA UNIV IN THE CITY OF NEW YORK
Hierarchical assembly of interconnects for molecular electronics
InactiveUS20050156157A1Well representedSemiconductor/solid-state device detailsNanoinformaticsNanowireNanoparticle
A hierarchical assembly methodology can interconnect individual two- and / or three-terminal molecules with other nanoelements (nanoparticles, nanowires, etc.) to form solution-based suspensions of nanoscale assemblies. The nanoassemblies can then undergo chemical-selective alignment and attachment to nanopatterned silicon and / or other surfaces for interconnection and / or measurement.
Owner:NORTH CAROLINA STATE UNIV
Field-assisted micro- and nano-fabrication method
InactiveUS20050112505A1NanoinformaticsSemiconductor/solid-state device manufacturingNanolithographyMolecular electronics
A direct-write micro- or nano-lithography method for depositing a functional material with a preferred orientation onto a target surface. The method includes the steps of (1) forming a precursor fluid to the functional material; (2) operating a sub-micrometer tip to discharge, on contact, the precursor fluid onto the target surface so as to produce a desired pattern of deposited functional material in sub-micrometer dimensions; and (3) during the pattern-producing step, subjecting the deposited material to a highly localized electric or magnetic field for attaining a preferred orientation in at least a portion of the functional material. The method is particularly useful for microfabrication, nanotechnology, and molecular electronics.
Owner:HUANG WEN C +1
Molecular biosensor and method of single-molecule detection of DNA or protein using the same
InactiveCN102375007AGood test resultImprove stabilityMaterial electrochemical variablesCarbon nanotubeMolecular electronics
The invention discloses a rapid and high sensitive molecular biosensor and a method of single-molecule detection of DNA or protein using the molecular biosensor. The molecular biosensor disclosed herein comprises: a) at least a single-walled carbon nanotube transistor device, wherein, the single-walled carbon nanotube transistor device comprises a grid electrode, a source electrode, a drain electrode and a conducting channel, the conducting channel is a single-walled carbon nanotube which is cut into two sections to form two single-walled carbon nanotubes with a gap of 1-10 nm; and b) an aptamer, wherein, the terminals of the aptamer are modified by terminal amino groups, and the aptamer is connected with the two ends of the carbon nanotubes forming the gap through an amide bond. The method is a reliable and practical method with general applicability. According to the method, nano / molecular electronics and the biosystem are combined, and the direct and real-time detection of the activities of DNA or protein with single-minded selectivity and ultrahigh sensitivity is realized by using functionalized mono-molecular devices and electric signal measurement.
Owner:PEKING UNIV
Field effect transistor device with graphene as electrode and method for producing the same
InactiveCN101404322ASmall sizeImprove mobilitySolid-state devicesSemiconductor/solid-state device manufacturingDielectricGate dielectric
The invention provides a field effect transistor device by taking graphene as an electrode and a preparation method thereof. In the device, the material of a source region and a drain region is graphene; the materials of a channel region are various small organic molecules, high polymers and semiconducting polymer materials, such as polythiophene, pentacene, polycyclic aromatic hydrocarbon, perylene imide and the like; and the material of a gate region is highly doped conductive silicone. The device further comprises a gate dielectric layer the material of which is silicon dioxide, silicon nitride and various high-K dielectrics. The nano field effect transistor device can be n-typed, p-typed or amphoteric type, and the device realizes all functions of a macroscopic field effect transistor device at the nanometer level. The transistor device has very high application value in terms of ultrasensitive environmental stimuli response devices, ultrasensitive solar stimuli response devices and the like. In addition, in the fields of molecular electronics and nanometer, the transistor device plays an essential role of promoting the development of ultramicro photoelectric devices with various dimensions at molecular level.
Owner:PEKING UNIV
Fabricating inorganic-on-organic interfaces for molecular electronics employing a titanium coordination complex and thiophene self-assembled monolayers
InactiveUS20070098902A1Material nanotechnologyNanoinformaticsSelf-assembled monolayerTitanium nitride
Systems and methods for preparing inorganic-organic interfaces using transition metal coordination complexes and self-assembled monolayers as organic surfaces. In one embodiment, a silicon wafer supports a polycrystalline gold layer, optionally using an intermediate adhesionlayer such as Cr. The surface is reacted with the thiophene end of organic molecular species comprising a thiophene moiety to prepare self assembling monomers (SAMs). The functionalized end of the SAM is then reacted with metal-bearing species such as tetrakis(dimethylamido)titanium, Ti[N(CH3)2]4, (TDMAT) to provide a titanium nitride layer.
Owner:CORNELL RES FOUNDATION INC
Nanoarrays of single virus particles, methods and instrumentation for the fabrication and use thereof
ActiveUS20070129321A1Increase the scope of applicationBiocideMaterial nanotechnologyDip-pen nanolithographyMolecular electronics
A novel coordination chemistry or metal ion binding approach to controlling the site-isolation and orientation of virus particles, such as TMV, on a nanoarray template generated by lithography including Dip Pen Nanolithography. By using the surface chemistry that is inherent in many viruses, metal-ion based or inorganic coordination chemistry was used to immobilize individual virus particles without the need for their genetic modification. Single particle control will enable a wide variety of studies involving viruses that are not possible with microarrays because of the size mismatch between the architecture of the virus and the features that make up such arrays. These include: single particle, single cell infectivity studies, the exploration of such structures as templates in materials synthesis and molecular electronics, and studies aimed at understanding how surface presentation can influence their bioactivity. This is a pioneering example of such control at the single-particle level, and therefore, commercial use of nanoarrays in biological systems.
Owner:NORTHWESTERN UNIV
Nanoarrays of single virus particles, methods and instrumentation for the fabrication and use thereof
ActiveUS7569340B2Immobilised enzymesMaterial nanotechnologyDip-pen nanolithographyMolecular electronics
A nanoarray template utilizing coordination chemistry or metal ion binding to control the site-isolation and orientation of virus particles is provided. The nanoarray template is generated by lithography including Dip Pen Nanolithography. The surface chemistry that is inherent in many viruses, metal-ion based or inorganic coordination chemistry is used to immobilize individual virus particles without the need for their genetic modification. Single particle control enables a wide variety of studies involving viruses that are not possible with microarrays, including single particle, single cell infectivity studies, exploration of such structures as templates in materials synthesis and molecular electronics, and studies aimed at understanding how surface presentation influences their bioactivity. This is an example of such control at the single-particle level, and therefore, commercial use of nanoarrays in biological systems.
Owner:NORTHWESTERN UNIV
Array-based architecture for molecular electronics
InactiveUS20060161876A1Solve insufficient capacityNanoinformaticsSolid-state devicesSignal routingEngineering
An architecture for nanoscale electronics is disclosed. The architecture comprises arrays of crossed nanoscale wires having selectively programmable crosspoints. Nanoscale wires of one array are shared by other arrays, thus providing signal propagation between the arrays. Nanoscale signal restoration elements are also provided, allowing an output of a first array to be used as an input to a second array. Signal restoration occurs without routing of the signal to non-nanoscale wires.
Owner:CALIFORNIA INST OF TECH +1
Thin Film Devices Utilizing Hexabenzocoronenes
InactiveUS20070292601A1Bridging the gapMaterial nanotechnologyOrganic chemistryLithographic artistSelf-assembled monolayer
The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnected a cut SWNT is used as a sensor to detect a biological binding event.
Owner:NUCKOLLS COLIN +4
Switchable nucleic acids for diagnostics, screening and molecular electronics
ActiveUS20060216692A1Rule out the possibilityBioreactor/fermenter combinationsBiological substance pretreatmentsHiv 1 rnaFluorescence
In one embodiment, the present invention relates to fluorescent nucleic acid constructs and methods of using these switchable constructs to rapidly screen for target molecule interactions. More particularly, an RNA / DNA chimera comprising a fluorophore-quencher pair and a nucleic acid construct is disclosed for the rapid screening of interactions between the HIV-1 nucleocapsid protein, NCp7, and a stem-loop region, SL3, of the HIV-1 RNA, or antagonists thereof. The compositions and methods disclosed herein can be used in preferred aspects of the present invention for diagnosing disease states, distinguishing the presence of infectious or toxic agents, drug discovery and design, and molecular electronic applications.
Owner:SYRACUSE UNIVERSITY
Molecular electronics arrangement and method for producing a molecular electronics arrangement
InactiveUS7189988B2Reduce spendingEasily damagedIndividual molecule manipulationNanoinformaticsElectrical conductorEngineering
The invention relates to a molecular electronics arrangement comprising a substrate, at least one first strip conductor having a surface and being arranged in or on the substrate, a spacer which is arranged on the surface of the at least one first strip conductor and which partially covers the surface of the at least one first strip conductor, and at least one second strip conductor which is arranged on the spacer and comprises a surface which faces the surface of the at least one first strip conductor in a plane manner. The spacer partially covers the surface of the at least one second strip conductor, and defines a pre-determined distance between the at least one first strip conductor and the at least one second strip conductor. The inventive molecular electronics arrangement also comprises molecular electronics molecules which are arranged between a free region of the surface of the at least one first strip conductor and a free region of the surface of the at least one second strip conductor, the length of said molecules being essentially equal to the distance between the at least one first strip conductor and the at least one second strip conductor. The invention also relates to a method for producing a molecular electronics arrangement.
Owner:POLARIS INNOVATIONS
Methods and systems for DNA data storage
PendingCN110431148ALow costSave energyMicrobiological testing/measurementTransferasesNucleotideEngineering
In various embodiments, an information storage system comprises: a writing device for synthesizing a nucleotide sequence that encodes a set of information; and a reading device for interpreting the nucleotide sequence by decoding the interpreted nucleotide sequence into the set of information, wherein the reading device comprises a molecular electronics sensor, the sensor comprising a pair of spaced apart electrodes and a molecular complex attached to each electrode to form a molecular electronics circuit, wherein the molecular complex comprises a bridge molecule and a probe molecule, and wherein the molecular electronics sensor produces distinguishable signals in a measurable electrical parameter of the molecular electronics sensor, when interpreting the nucleotide sequence.
Owner:ROSWELL BIOTECH INC
Process for derivatizing carbon nanotubes with diazonium species and compositions thereof
The present invention specifically describes a new method for chemical modification of carbon nanotubes. Such methods involve the derivatization of multiwalled and single-walled carbon nanotubes, including small-diameter (about 0.7 nm) single-walled carbon nanotubes derivatized with diazo compounds. This method allows various organic compounds to be chemically attached to the sidewalls and ports of carbon nanotubes. Such chemically modified carbon nanotubes are used in polymer composites, molecular electronics and sensor elements. Derivatization methods include electrochemically induced reactions, thermally induced reactions (via in situ or pre-generated diazo compounds) and photochemically induced reactions. Derivatization significantly changes the spectral properties of the nanotubes. The functionality is estimated to be approximately one functional moiety for every 20-30 carbon atoms in the nanotube. Such electrochemical reduction methods can be used for site-selective chemical functionalization of nanotubes, and, after modification with appropriate chemical groups, derivatized nanotubes are chemically compatible with the polymer matrix, enabling nanotube properties (e.g., mechanical strength or conductivity) essentially translates into composite properties. Moreover, after modification of appropriate chemical genes, these chemical groups can be polymerized into polymers including carbon nanotubes.
Owner:RICE UNIV
Preparation method of single-layer graphene single molecule junction with mechanically controllable nanometer gap
InactiveCN107265396AEfficient connectionImprove stabilityDecorative surface effectsChemical vapor deposition coatingSingle layer grapheneGraphene electrode
The invention discloses a method for a single-layer graphene electrode capable of precisely controlling the nanometer gap, as well as a technology and process flow for constructing a single-molecule junction with graphene as an electrode. The invention is realized by utilizing the single-layer thin film preparation technology, micro-nano processing related technology and mechanical controllable cracking technology. By placing the prepared single-layer graphene chip on a mechanically controllable three-point bending device, the substrate is continuously bent to break the single-layer graphene to form a single-layer graphene electrode pair with a controllable nanometer gap. Finally, single-layer graphene single-molecule junctions are formed by linking organic molecules between the gaps using amide covalent bonds. Since this method can precisely adjust the size of the nano-gap to match the molecular length at the picometer level, it can achieve high-efficiency mass production of single-layer graphene single-molecule junctions. Moreover, single-layer graphene has stable properties, which improves the stability of single-molecule junction devices, lays the foundation for the industrialization of molecular devices, and has great significance in the development of molecular electronics.
Owner:NANKAI UNIV
Selective functionalization of carbon nanotube tips allowing fabrication of new classes of nanoscale sensing and manipulation tools
InactiveUS7514214B2Extend utility and sensitivityMaterial nanotechnologyMaterial analysis using wave/particle radiationRedox enzymesFluorescence
Owner:CALIFORNIA INST OF TECH
Molecular quantum interference apparatus and applications of same
A molecular quantum interference device for use in molecular electronics. In one embodiment, the device includes a molecular quantum interference unit having a first terminal group and a second terminal group between which quantum interference affects electrical conduction, a molecular spacer having a first terminal group and a second terminal group and coupled to the molecular quantum interference unit through a chemical bonding between the first terminal group of the molecular spacer and the second terminal group of the molecular quantum interference unit, a first electrode electrically coupled to the molecular quantum interference unit and configured to supply charge carriers to or receive charge carriers from the molecular quantum interference unit, and a second electrode electrically coupled to the molecular spacer and configured to receive charge carriers from or supply charge carriers to the molecular spacer.
Owner:NORTHWESTERN UNIV
Method of forming one or more nanopores for aligning molecules for molecular electronics
InactiveUS20080203055A1Paper/cardboard articlesDecorative surface effectsMolecular arrayMolecular electronics
A technique is provided for forming a molecule or an array of molecules having a defined orientation relative to the substrate or for forming a mold for deposition of a material therein. The array of molecules is formed by dispersing them in an array of small, aligned holes (nanopores), or mold, in a substrate. Typically, the material in which the nanopores are formed is insulating. The underlying substrate may be either conducting or insulating. For electronic device applications, the substrate is, in general, electrically conducting and may be exposed at the bottom of the pores so that one end of the molecule in the nanopore makes electrical contact to the substrate. A substrate such as a single-crystal silicon wafer is especially convenient because many of the process steps to form the molecular array can use techniques well developed for semiconductor device and integrated-circuit fabrication.
Owner:HEWLETT PACKARD DEV CO LP
Process for producing nano-scale cross lines array structure organic molecule device
ActiveCN101083301AAvoid damageImprove reliabilitySolid-state devicesSemiconductor/solid-state device manufacturingProtection layerMolecular electronics
Owner:SEMICON MFG INT (SHANGHAI) CORP +1
Hierarchical Assembly of Interconnects for Molecular Electronics
InactiveUS20070170437A1Well representedSemiconductor/solid-state device detailsNanoinformaticsNanowireNanoparticle
A hierarchical assembly methodology can interconnect individual two- and / or three-terminal molecules with other nanoelements (nanoparticles, nanowires, etc.) to form solution-based suspensions of nanoscale assemblies. The nanoassemblies can then undergo chemical-selective alignment and attachment to nanopatterned silicon and / or other surfaces for interconnection and / or measurement.
Owner:NORTH CAROLINA STATE UNIV
Hybrid integrated circuit structure of three-dimensional CMOS and molecule switching element
InactiveCN101431070AHighly integratedImprove practicalitySemiconductor/solid-state device detailsSolid-state devicesCMOSEngineering
The invention relates to the technical field of nanometer circuit structures in microelectronics and molectronics, which discloses a three-dimensional hybrid integrated circuit structure of a CMOS and a molecular switch device. The structure is formed by sequentially connecting a CMOS device as a top layer, a molecular switch device and a CMOS device as a bottom layer from the top to the bottom; the CMOS device at the top layer is connected with an electrode on the molecular switch device by a through hole, the CMOS device at the bottom layer is connected with an electrode below the molecular switch device by a through hole, and the CMOS device at the top layer and the CMOS device at the bottom layer are bonded together. The invention avoids the influence on the upper electrode and the lower electrode by the through holes which are not on the same surface. Meanwhile, the circuit integration is increased by once, and the invention has higher creative meaning and practical value.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Method for fabricating nano pore
InactiveUS20050142298A1Simple processAnodisationMaterial nanotechnologyMolecular electronicsNanometre
Provided is a method for fabricating a nanoscale pore which has been researched in a molecular electronics field of chemistry and in a molecular dynamics field of biology, wherein a oxidation pattern is selectively formed on a thin mask layer by anodic nano-oxidation using an AFM, and the oxidation pattern is selectively etched, thereby fabricating the nanoscale pore. Thus, the present invention provides a simple and easy method for fabricating nano pore array.
Owner:ELECTRONICS & TELECOMM RES INST
Metal-free silicon-molecule-nanotube testbed and memory device
InactiveUS20070111486A1Rule out the possibilityFirmly connectedMaterial nanotechnologyNanoinformaticsHysteresisTestbed
Work from several laboratories has shown that metal nanofilaments cause problems in some molecular electronics testbeds. A new testbed for exploring the electrical properties of single molecules has been developed to eliminate the possibility of metal nanofilament formation and to ensure that molecular effects are measured. This metal-free system uses single-crystal silicon and single-walled carbon nanotubes as electrodes for the molecular monolayer. A direct Si-arylcarbon grafting method is used. Use of this structure with π-conjugated organic molecules results in a hysteresis loop with current-voltage measurements that are useful for an electronic memory device. The memory is non-volatile for more than 3 days, non-destructive for more than 1,000 reading operations and capable of more than 1,000 write-erase cycles before device breakdown. Devices without π-conjugated molecules (Si—H surface only) or with long-chain alkyl-bearing molecules produced no hysteresis, indicating that the observed memory effect is molecularly relevant.
Owner:RICE UNIV
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