摘要:
A nano-colonnade structure-and methods of fabrication and interconnection thereof utilize a nanowire column grown nearly vertically from a (111) horizontal surface of a semiconductor layer to another horizontal surface of another layer to connect the layers. The nano-colonnade structure includes a first layer having the (111) horizontal surface; a second layer having the other horizontal surface; an insulator support between the first layer and the second layer that separates the first layer from the second layer. A portion of the second layer overhangs the insulator support, such that the horizontal surface of the overhanging portion is spaced from and faces the (111) horizontal surface of the first layer. The structure further includes a nanowire column extending nearly vertically from the (111) horizontal surface to the facing horizontal surface, such that the nanowire column connects the first layer to the second layer.
摘要:
Various embodiments of the present invention are directed to implementation and use of logic-state-storing, impedance-encoded nanoscale, impedance-encoded latches that store logic values as impedance states within nanoscale electronic circuits that employ impedance-driven logic. In certain of these embodiments, use of nanoscale, impedance-encoded latches together with nanoscale electronic circuits that employ impedance-driven logic avoids cumulative degradation of voltage margins along a cascaded series of logic circuits and provides for temporary storage of intermediate logic values, allowing for practical interconnection of nanowire-crossbar-implemented logic circuits through nanoscale, impedance-encoded latches to other nanowire-crossbar-implemented logic circuits in order to implement complex, nanoscale-logic-circuit pipelines, nanoscale-logic-circuit-based state machines, and other complex logic devices with various different interconnection topologies and corresponding functionalities.
摘要:
A sensor includes traps that are adjacent to a waveguide and capable of holding a contaminant for an interaction with an evanescent field surrounding the waveguide. When held in a trap, a particle of the contaminant, which may be an atom, a molecule, a virus, or a microbe, scatters light from the waveguide, and the scattered light can be measured to detect the presence or concentration of the contaminant. Holding of the particles permits sensing of the contaminant in a gas where movement of the particles might otherwise be too fast to permit measurement of the interaction with the evanescent field. The waveguide, a lighting system for the waveguide, a photosensor, and a communications interface can all be fabricated on a semiconductor die to permit fabrication of an autonomous nanosensor capable of suspension in the air or a gas being sensed.
摘要:
A composite material and related methods are described, the composite material being configured to exhibit a negative effective permittivity and/or a negative effective permeability for incident radiation at an operating wavelength, the composite material comprising an arrangement of electromagnetically reactive cells of small dimension relative to the operating wavelength. Each cell includes an externally powered gain element for enhancing a resonant response of that cell to the incident radiation at the operating wavelength.
摘要:
A route to the fabrication of electronic devices is provided, in which the devices consist of two crossed wires sandwiching an electrically addressable molecular species. The approach is extremely simple and inexpensive to implement, and scales from wire dimensions of several micrometers down to nanometer-scale dimensions. The device of the present invention can be used to produce crossbar switch arrays, logic devices, memory devices, and communication and signal routing devices. The present invention enables construction of molecular electronic devices on a length scale than can range from micrometers to nanometers via a straightforward and inexpensive chemical assembly procedure. The device is either partially or completely chemically assembled, and the key to the scaling is that the location of the devices on the substrate are defined once the devices have been assembled, not prior to assembly.
摘要:
A demultiplexer for a two-dimensional array of a plurality of nanometer-scale switches (molecular wire crossbar network) is disclosed. Each switch comprises a pair of crossed wires which form a junction where one wire crosses another and at least one connector species connecting said pair of crossed wires in said junction. The connector species comprises a bi-stable molecule. The demultiplexer comprises a plurality of address lines accessed by a first set of wires in the two-dimensional array by randomly forming contacts between each wire in the first set of wires to at least one of the address lines. The first set of wires crosses a second set of wires to form the junctions. The demultiplexer solves both the problems of data input and output to a molecular electronic system and also bridges the size gap between CMOS and molecules with an architecture that can scale up to extraordinarily large numbers of molecular devices. Further, the demultiplexer is very defect tolerant, and can work despite a large number of defects in the system.
摘要:
An electrophoretic technique is provided for moving a plurality of chemicals into distinct zones for immobilization on a solid surface. The technique includes introducing a first electrolyte and a second electrolyte into a channel, and interposing between the first and second electrolytes at least one solution containing a plurality of chemicals. Under a given electric field, the first electrolyte has anions with higher effective mobility than the chemicals and the second electrolyte has anions with lower effective mobility than the chemicals. When an electrical potential is applied across the length of the channel the plurality of chemicals in the solution are moved into spatial zones. The chemicals in the zones can then be bound to the interior surface of the channel. Chemicals so bound to the wall surface can be used to build very small structures such as arrays and electrical conducting structures.
摘要:
A network connection scheme for a direct or an indirect network. The network is implemented in two levels of circuit boards. Every board in the first level crosses all the boards in the second level, with every processor in the first level circuit board coupled to at least two processors that are on two second level circuit boards. This scheme significantly reduces the difficulty in implementing the network.
摘要:
This invention discloses a processing structure, and related method, for performing a selected data processing function by means of multiple processing modules that are selected to perform the selected function when appropriately connected together. The modules are removably connected to a common structure, such as a circuit board, which has associated with it a crossbar switch for providing intermodule data connections necessary for performing the selected function, and a synchronization unit for providing control signals to the modules to keep them in appropriate synchronism for performing the selected function. Convenient reconfiguration of the structure is effected by conditioning the crossbar switch and the synchronization unit as necessary to perform the different function.
摘要:
An electrically actuated device includes a first electrode, a second electrode, and an active region disposed between the first and second electrodes. The device further includes at least one of dopant initiators or dopants localized at an interface between i) the first electrode and the active region, or ii) the second electrode and the active region, or iii) the active region and each of the first and second electrodes.