38 results about "Molecular junction" patented technology

Methods for implementing familiar electronic circuits at nanoscale sizes using molecular-junction-nanowire crossbars, and nanoscale electronic circuits produced by the methods. In one embodiment of the present invention, a 3-state inverter is implemented. In a second embodiment of the present invention, two 3-state inverter circuits are combined to produce a transparent latch. The 3-state inverter circuit and transparent-latch circuit can then be used as a basis for constructing additional circuitry, including master/slave flip-flops, a transparent latch with asynchronous preset, a transparent latch with asynchronous clear, and a master/slave flip-flop with asynchronous preset. 3-state inverters can thus be used to compose latches and flip-flops, and latches and flip-flops can be used, along with additional Boolean circuitry, to compose a wide variety of useful, state-maintaining circuits, all implementable within molecular-junction-nanowire crossbars by selectively configuring junctions within the molecular-junction-nanowire crossbars.

The present invention discloses a protein transistor device, wherein an antibody molecule (antibody-antigen) is bonded to at least two gold nanoparticles in a high reproducible self-assembly way to form molecular junctions, and wherein the two gold nanoparticles are respectively joined to a drain and a source. The protein transistor device can be controlled to regulate current via applying a bias to the gate. The conformational change of the protein molecule will cause the variation of the charge transport characteristics of the protein transistor device. The protein transistor device can be further controlled by different optical fields via conjugating a quantum dot to the molecular junctions. Therefore, the present invention has diversified applications.

A method for configuring nanoscale neural network circuits using molecular-junction-nanowire crossbars, and nanoscale neural networks produced by this method. Summing of weighted inputs within a neural-network node is implemented using variable-resistance resistors selectively configured at molecular-junction-nanowire-crossbar junctions. Thresholding functions for neural network nodes are implemented using pFET and nFET components selectively configured at molecular-junction-nanowire-crossbar junctions to provide an inverter. The output of one level of neural network nodes is directed, through selectively configured connections, to the resistor elements of a second level of neural network nodes via circuits created in the molecular-junction-nanowire crossbar. An arbitrary number of inputs, outputs, neural network node levels, nodes, weighting functions, and thresholding functions for any desired neural network are readily obtained by the methods of the present invention.

A method for configuring any m-to-n multiplexer from a molecular-junction-nanowire crossbar, and m-to-n multiplexers configured according to the disclosed method. In the described embodiments, a complementary/symmetry molecular-junction-nanowire crossbar is employed, with input nanowire signal lines intersecting certain relatively high-voltage narrow nanowires via nFET devices and intersecting grounded nanowires via pFET devices. The relatively high-voltage and grounded nanowires are, in turn, selectively coupled to one or more output nanowire signal lines.

A method of crystallizing a molecule-of-interest is disclosed. The method comprises (a) contacting molecules of the molecule-of-interest with at least one type of heterologous molecular linker being capable of interlinking at least two molecules of said molecule-of-interest to thereby form a crystallizable molecular complex of defined geometry; and (b) subjecting said crystallizable molecular complex to crystallization-inducing conditions, thereby generating the crystal containing said molecule-of-interest.

This invention provides a composition matter comprising rare earth-doped up-conversion nanoparticles (UCNPs) encapsulated with a silica shell. In one embodiment, a photosensitizer is incorporated into the silica shell. In another embodiment, the composition further comprises a targeting molecule. In still another embodiment, a small interfering RNA (siRNA) molecule is also attached to the silica shell with the targeting molecule. The invention further provides methods for synthesizing such compositions and for using them in therapeutic and diagnostic applications. These applications use infrared or near infrared activation to excite the UCNPs.

An apparatus and method for simultaneously measuring, in an immersion microchannel environment, the characteristics of molecular junctions such as a low-molecular-weight biomaterial and the like and the refractive index of a buffer solution by using ellipsometry. Specifically, disclosed is an apparatus for simultaneously measuring, with high sensitivity, the change in refractive index of a buffer solution and the junction dynamic characteristics of a biomaterial by allowing polarized incident light to be received at a biomaterial adsorption layer, which is formed on a substrate such as a semiconductor and the like, so as to meet an anti-reflection condition of a P-wave by using a prism structure and a microchannel; and a measurement method using the same.

A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.

The invention discloses a preparation method of an addressable nano molecular junction, belonging to the field of micro machining of nano materials and testing of nano electronic devices. The preparation method comprises the steps of: firstly, washing a piezoelectric ceramic substrate; preparing an insulation layer film on the piezoelectric ceramic substrate and obtaining a micro nano strip-shaped bulge on the middle; preparing a narrow-neck-shaped Au electrode film layer on the insulation layer film; placing the piezoelectric ceramic substrate in a vacuum chamber, respectively welding leads on two sides of the piezoelectric ceramic substrate and leading out a vacuum chamber; electrifying the piezoelectric ceramic substrate to ensure that the Au electrode film layer is broken to obtain a metal electrode pair with a nano gap; and finally, filling an organic molecular material in the nano electrode gap to obtain the addressable nano molecular junction. According to the invention, the gap controllable nano Au electrode pair is obtained through regulating bias voltages and electrifying time of two ends of the piezoelectric ceramic substrate, thus pollution and thermally induced ablation on a metal molecular interface when electrodes deposit on a molecular layer are avoided through molecule self-assembly in the gap.

The invention discloses a method of precisely stretching a carbon nanotube, and a method and process flow of efficiently constructing a single molecular junction by mean of a carbon nanotube. The carbon nanotube single molecular junction preparation method with a high success rate is implemented through a micro nano processing correlation technique and a mechanical controllable breakage junction technique. The carbon nanotube single molecular junction preparation method includes the steps: through a series of micro nano processing flows, making a stable single wall carbon nanotube chip; disposing the single wall carbon nanotube chip on a three-point bending device; continuously bending the chip substrate to break the single wall carbon nanotube so as to form a gap-controllable electrode pair; and forming a single wall carbon nanotube single molecule junction by adding organic molecules in the gap. The carbon nanotube single molecular junction preparation method can accurately regulate and control the size of the gap to match various molecule lengths, thus being able to realize high production capacity production of single wall carbon nanotube single molecule junctions, laying the foundation for realizing molecule devices with high performance, and having a relatively higher reference value for development of molecular electronics.

The invention discloses a single-molecular-junction logic gate. The single-molecular-junction logic gate comprises a logic gate single molecular junction, a positive electrode, a negative electrode, a laser device and a molecular junction logic gate readout device, wherein the two ends of the logic gate single molecular junction are electrically connected with the positive electrode and the negative electrode respectively; the laser device is arranged over the electrodes; the molecular junction logic gate readout device is arranged on one side of the logic gate single molecular junction, and is arranged close to the logic gate single molecular junction; the emitting end of the laser device points to the logic gate single molecular junction; and laser light emitted by the laser device is laser light of 633 nanometers. Logic operation of the micro-scale logic gate single molecular junction under an electrical control condition is realized, and the logic gate single molecular junction has extremely high logic operating rate and response capability; and meanwhile, real single molecular operation capability is provided by the logic gate single molecular junction, so that an important foundation is laid for the replacement of a silicon semiconductor technology.

The invention discloses an STM-BJ-based monomolecular junction thermoelectric potential measurement method and STM-BJ-based monomolecular junction thermoelectric potential measurement equipment. A Seebeck coefficient of a molecular junction is obtained by acquiring a single molecule, verifying the single molecule, measuring a thermal voltage, verifying the single molecule, repeatedly acquiring a plurality of pieces of data, and then carrying out corresponding statistics and calculation. A stable and easily-adjusted heat source is provided for a substrate based on an STM-BJ technology, so thatthe temperature difference is constructed at the two ends of the molecular junction, an independent voltage amplifier is introduced to measure the electromotive force generated by the temperature difference after the molecular junction is formed, and therefore measurement of the thermoelectric potential of the monomolecular junction is achieved. Compared with an MCBJ technology and an STM-BJ needle tip temperature control technology, the research means has the advantages of being simple, efficient, wide in adjustable range, high in error-tolerant rate and the like, the measurement efficiency of the monomolecular junction thermoelectric potential is greatly improved, research and development of a novel organic thermoelectric material are promoted, and powerful assistance is provided for thesociety where the energy urgently needs to be changed.

The invention discloses a composite material, a preparation method thereof and a quantum dot light-emitting diode. The composite material comprises carbon quantum dots, organic molecule connectors and metal nano particles, and the surfaces of the carbon quantum dots are combined with hydroxyl groups; and one ends of the organic molecule connectors are combined with hydroxyl groups of the carbon quantum dots through carboxyl groups, and the other ends of the organic molecule connectors are combined with the metal nano particles through functional groups with a metal bonding property. On the premise of keeping the excellent performance of the carbon quantum dots, the luminescence performance of the carbon quantum dots can be enhanced by utilizing surface plasma resonance formed on the surfaces of the carbon quantum dots by the metal nano particles. The carbon quantum dots have very excellent conductivity by utilizing the good conductivity of the metal nano particles. The composite material disclosed by the invention is excellent in film-forming property, capable of effectively inhibiting the phenomenon of carbon quantum dot solid-state fluorescence quenching, good in bio-compatibility, low in preparation cost and easy to prepare.

An ultra-thin and highly transparent wafer-type plasmonic solar cell comprises a layer of a conductive transparent substrate, a layer of an n-type semiconductor, a layer made of metal nanoparticles selected from the group consisting of copper, gold or silver, and a layer made of a p-type semiconductor, wherein the substrate, n-type semiconductor, metal nanoparticles and p-type semiconductor respectively are linked by covalent bonds by means of one or more molecular linker/linkers. A method for producing said plasmonic solar cell by self-assembly is disclosed.

The invention belongs to the technical field of molecular electronics, and discloses an anthryl molecular junction with a photoelectric detection function and a preparation method and application thereof. In the preparation process, the axial matching capacity is considered, and a rhodium acetate dimer complex [Rh2 (O2CCR3) 4] (R = H, F and CH3) is used as strong Lewis acid to react with a pyridyl bidentate organic ligand (L); meanwhile, photosensitive organic molecules are introduced into an Rh2-L molecular skeleton. A rhodium acetate dimer complex [Rh2 (O2CCR3) 4] complex and an organic ligand can easily form a stable adduct [Rh2 (mu-O2CCR3) 4L2], and by utilizing the advantage, the supramolecular junction with a photosensitive structural unit is successfully constructed on a gold electrode by adopting a step-by-step preparation method.

The invention relates to a mercaptobenzene functionalized graphene/copper composite heat-conducting coating and a preparation method. The synthesis general formula is TP-Gr-Cu, functionalized graphene TP-Gr and nano-copper are chemically connected through a mercaptobenzene molecular junction, sulfur atoms in the mercaptobenzene molecular junction and the nano-copper form a strong S-Cu covalent bond through electron tunneling, and an electron tunneling heat conduction path is constructed so that electrons can be freely conducted. The preparation method comprises the following steps of firstly, preparing the mercaptobenzene functionalized graphene, and then preparing the mercaptobenzene functionalized graphene/copper composite heat-conducting coating on a metal copper substrate through a pulse electrochemical co-deposition method. A novel graphene/metal composite heat conduction coating electron tunneling heat conduction path is constructed, chemical connection of graphene and nano-copper through mercaptobenzene molecular junctions is successfully established, the deposited mercaptobenzene functionalized graphene is compactly attached to the copper substrate, and the function of radiation heat dissipation of a molecular fan is achieved. A graphene/copper composite material has high heat conductivity coefficient and high heat conductivity; and compared with a composite material in which pi electrons participate in heat transfer, the heat-conducting coefficient is higher.

Disclosed are a metallocenyl dendrimer, an organic memory device using the metallocenyl dendrimer and a method for fabricating the organic memory device. The metallocenyl dendrimer may be composed of a dendrimer and metallocenes as redox species linked to the dendrimer. The organic memory device may possess the advantages of shorter switching time, decreased operating voltage, decreased fabrication costs and increased reliability. Based on these advantages, the organic memory device may be used as a highly integrated, large-capacity memory device.