 Microstructure-bearing articles of high refractive index |
| ; PREFERRED EMBODIMENTS The optical resinous articles of the present invention are characterized by ... |
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| Line light source including fluorescent colorant |
| The present invention provides a line light source which exhibits improved conspicuity in ... |
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| Waveguide security device |
| OF THE INVENTION Referring to the figures in detail, a preferred embodiment of a waveguide ... |
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| Ink jet recording paper |
| What is claimed is: 1. An ink jet recording paper comprising: a substrate; an anchor coating layer ... |
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| Random phase plate for holography and process for manufacturing same |
| What is claimed is: 1. A process for producing a random phase holographic plate coated with ... |
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| Transfer lamination of vapor deposited foils, method and product |
| OF THE INVENTION As illustrated in FIG. 1, the product of this invention is a laminate 10 ... |
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| Method for applying an embossing foil to a flexible material |
| An object of the present invention is to overcome the disadvantages of the above-discussed methods ... |
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| Method of manufacture of foil material and the foil material made thereby |
| What is claimed is: 1. A method of manufacturing a foil material including a backing foil and metal ... |
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| Process for preparing blazed holograms |
| According to the present invention, a process for preparing blazed holograms is provided which ... |
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Functional devices comprising a charge transfer complex layer
| Details |
Inventors: Yamashita, Akio; Yoshimura, Susumu; Tsuchiya, Sohji;
Assignee: Matsushita Electric Industrial Co., Ltd. (JP)
Primary Examiner: Lesmes; George F.
Assistant Examiner: Brown; Christopher
Attorney, Agent or Firm: Lowe, Price, LeBlanc & Becker
Functional devices using charge transfer complexes formed as a layer on a substrate. In one embodiment of the invention, the device comprises a substrate, an electrode layer formed on one side of the substrate, at least one layer of a charge transfer complex capable of undergoing a variation in charge transferability by application of external energy, and another electrode layer formed on the complex layer. The charge transfer complex consists essentially of an electron donor and an electron acceptor, at least one of which is an organic compound having a long-chain alkyl substituent. In another embodiment, a charge transfer complex layer is provided on a substrate as polarized in one direction, in which the charge transfer complex does not necessarily contain such a substituted donor or acceptor compound as in the first embodiment but ordinary charge transfer complexes may be used. A pair of electrodes may be provided to sandwich the complex layer therebetween. |
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DETAILED DESCRIPTION It is an object of the invention to provide a functional device which makes use of a charge transfer complex of a specific type whereby the neutral-ionic or ionic-neutral phase transition can be caused to proceed stably and reproducibly.
It is another object of the invention to provide a functional device in which a charge transfer complex used consists of an electron donor and an electron acceptor, at least one of which has a long chain alkyl substituent whereby the charge transfer complex undergoes a stable neutral-ionic phase transition at normal temperatures and normal pressures by application of external energy.
It is a further object of the invention to provide a functional device which comprises a layer of a charge transfer complex which is polarized in one direction, so that optical or electric or other physical properties of the layer are significantly improved upon application of external energy.
In accordance with one embodiment of the invention, there is provided a functional device which comprises a substrate, an electrode layer formed on one side of the substrate, at least one layer of a charge transfer complex capable of undrgoing a variation in charge transferability by application of external energy, and another electrode layer formed on the complex layer.
In the device, the charge transfer complex used is made of an electron donor and an electron acceptor, one of which is an organic compound having has a long-chain alkyl substituent.
The alkyl substituent has preferably from 10 to 22 carbon atoms.
When external energy such as electric, optical or electromagnetic energy is applied to the device, a neutral-ionic or ionic-neutral phase transition takes place in the charge transfer complex layer.
This phase transition results in the variation in electric, optical or electromagnetic characteristics.
Accordingly, the device may be used as an electric or optical sensor.
Alternatively, if the charge transfer complex used undergoes a color change by application of an electric signal, the device may be used as a display device or memory
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Optical Systems 
