摘要:
This invention concerns the fabrication of nanoscale and atomic scale devices. The method involves creating one or more registration markers. Using a SEM or optical microscope to form an image of the registration markers and the tip of a scanning tunnelling microscope (STM). Using the image to position and reposition the STM tip to pattern the device structure. Forming the active region of the device and then encapsulating it such that one or more of the registration markers are still visible to allow correct positioning of surface electrodes. The method can be used to form any number of device structures including quantum wires, single electron transistors, arrays or gate regions. The method can also be used to produce 3D devices by patterning subsequent layers with the STM and encapsulating in between.
摘要:
A silicon substrate is coated with one or more layers of resist. First and second circuit patterns are exposed in sequence, where the second pattern crosses the first pattern. The patterned resist layers are developed to open holes which extend down to the substrate only where the patterns cross over each other. These holes provide a mask suitable for implanting single phosphorous ions in the substrate, for a solid state quantum computer. Further development of the resist layers provides a mask for the deposition of nanoelectronic circuits, such as single electron transistors, aligned to the phosphorous ions.
摘要:
Azo pigment coupling process in which the amount of excess diazo or coupling component is continuously monitored and addition of diazo component or coupling component to the reaction is automatically controlled by means of an automatic chemical analyzer which incorporates a dialyser module. The process involves a method of automatically controlling the coupling reaction by a continuous-flow chemical analyzer which continuously samples the reaction mixture and analyzes it for unreacted diazo or coupling component by dialysis and colorimetry, and automatically adjusts the rate of addition of this component to the reaction mixture to keep the concentration of unreacted component within a pre-set range during the period of the reaction.
摘要:
The present invention relates to a self-cleaning system for an air conditioner, comprising: a drain pan installed on an evaporator side of the air conditioner, the drain pan operative to collect condensate from the evaporator side; a pump coupled to the drain pan, the pump operative to pump the collected condensate through a set of piping; and a plurality of spray nozzles installed on a condenser side of the air conditioner, the spray nozzles coupled to the set of piping and operative to spray the collected condensate over a condenser in the condenser side, wherein the pump further comprises a control mechanism operative to trigger a cleaning cycle of pumping and spraying of the collected condensate.
摘要:
This invention concerns quantum computers in which the qubits are closed systems, in that the particle or particles are confined within the structure. A “site” can be produced by any method of confining an electron or other quantum particle, such as a dopant atom, a quantum dot, a cooper pair box, or any combination of these. In particular the invention concerns a closed three-site quantum particle system. The state in the third site is weakly coupled by coherent tunnelling to the first and second states, so that the third state is able to map out the populations of the first and second states as its energy is scanned with respect to the first and second states. In second and third aspects it concerns a readout method for a closed three-state quantum particle system.
摘要:
Ionisation of one of a pair of dopant atoms (11, 12) in a substrate (13) creates a double well potential, and a charge qubit is realised by the location of one or more electrons or holes (14) within this potential. The dopant atoms may comprise phosphorous atoms, located in a silicon substrate. A solid state quantum computer may be formed using a plurality of pairs of dopant atoms (11, 12), corresponding gate electrodes (22, 23), and read-out devices comprising single electron transistors (24).
摘要:
A pigment composition, suitable for use in modern offset and letter press inks, comprising:(A)(a) a pigment derived from (i) acetoacet-2,4-xylidide coupled on to tetrazotized 3,3'-dichlorobenzidine or from (ii) the mixed coupling of two or more of acetoacetanilide, acetoacet-2-anisidide, acetoacet-2-toluidide, acetoacet-2-chloranilide, acetoacet-2,4-xylidide and acetoacet-2,5-dimethoxy-4-chloranilide on to tetrazotized 3,3'-dichlorobenzidine;(b) a dyestuff derived from coupling acetoacetanilide, acetoacet-2-toluidide, acetoacet-2-chloranilide or acetoacet-2,4-xylidide on to tetrazotized benzidine-2,2'-disulfonic acid; and optionally(c) a resin or resinous material and(B)(a) a pigment derived from coupling one or more of acetoacetanilide, acetoacet-2-anisidide, acetoacet-2-toluidide, acetoacet-4-toluidide, acetoacet-2-chloranilide, acetoacet-2,4-xylidide and acetoacet-2,5-dimethoxy-4-chloranilide on to one or both of tetrazotized 3,3'-dichlorobenzidine and tetrazotized 3,3'-dimethoxybenzidine; and(b) an aliphatic amine,the ratio of components (A) and (B) in the pigment composition of the invention ranging from 35:65 to 95:5 % by weight.
摘要:
A stabilized opaque form of C.I. Pigment Yellow 74 comprises a mixture of(a) 99.0 to 80.0 wt. % of Color Index Pigment Yellow 74;and(b) 1.0 to 20.0 wt. % of a different monoazo yellow pigment based on acetoacet-2-anisidide. These pigment products are distinguished by improved storage stability when incorporated into applicational media.
摘要:
Automatically controlled continuous process for the diazotization or tetrazotization of aromatic amines in which the rate of addition of the inorganic nitrite is controlled by a polarovoltric method. The process comprises adding regularly and continuously to a reactor an aqueous slurry or solution of the amine containing sufficient acid for the diazotization process and simultaneously adding to the reactor a solution of an inorganic nitrite at a rate which is automatically regulated by a polarovoltric controller to ensure that a pre-selected concentration of unreacted nitrous acid is maintained in the reactor throughout the whole period of the reaction.
摘要:
Azo dyestuff coupling process in which the amount of excess diazo or coupling component is continuously monitored and the addition of diazo component or coupling component to the reaction is automatically controlled by means of an automatic chemical analyzer which incorporates a dialyzer module, which process is characterized in that azo metal salt pigments derived from sulphonated intermediates can be obtained by precipitating the pigment by adding a water-soluble metal salt to the water-soluble sulphonated azo dyestuff at some stage prior to the passage of the sample stream through the dialyzer.