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Functional molecular element, method for producing functional molecular element, and functional molecular device

A technology of molecular components and molecular devices, applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve problems such as the inability to improve the specific properties of molecular devices, large resistance, etc.

Inactive Publication Date: 2006-12-20
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] However, the problem is that regardless of whether the molecule itself has good electrical properties, the electrical connection between the mercapto group and the gold electrode will have a large resistance, which makes it impossible to improve the unique properties of molecular devices.

Method used

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  • Functional molecular element, method for producing functional molecular element, and functional molecular device
  • Functional molecular element, method for producing functional molecular element, and functional molecular device
  • Functional molecular element, method for producing functional molecular element, and functional molecular device

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no. 1 approach

[0088] The first embodiment mainly concerns functional molecular elements corresponding to claims 1-3.

[0089] Figure 1A is a schematic diagram of the functional molecular element 10 according to the first embodiment. Figure 1B is a schematic diagram of a comparative example. Figure 1C It is a schematic diagram illustrating the orientation of π-electron conjugated molecules 1 (or adsorbed molecules 9 on electrodes) in the first molecular layer constituting the array structure 4 of the functional molecular element 10 . figure 2 is the structural formula of the π-electron conjugated molecule 1 constituting the array structure 4 .

[0090] Such as figure 2 Said, the skeleton 2 of the π-electron conjugated molecule 1 is based on dimethylbilinone (or 4,9-dimethylbilin-1-one). Dimethicone is a linear tetrapyrrole whose structure corresponds to an open porphyrin ring. The π-electron conjugated molecule 1 consists of a backbone 2 and a side chain 3 (p-alkylphenyl) attached t...

no. 2 approach

[0103] The second embodiment is mainly concerned with a functional molecular device corresponding to claims 1-3 and 17-20, which device is an insulated gate field effect transistor, wherein the functional molecular element 10 (the element described in the first embodiment) is held between opposing electrodes. image 3 It is a cross-sectional view explaining the structure of the insulated gate field effect transistor 20 of this embodiment.

[0104] image 3 The shown insulated gate field effect transistor 20 is formed on a doped silicon substrate 11 which also serves as a gate 13 for controlling current flow. A gate insulating film 12 (or a silicon oxide film) is formed on the surface of the silicon substrate 11 . There are opposing gold electrodes (or source electrode 14 and drain electrode 15 ) on gate insulating film 12 . Between these electrodes is the array structure 4 described in the first embodiment.

[0105] Of the π-electron conjugated molecules 1 constituting the...

no. 3 approach

[0112] The third embodiment mainly relates to functional molecular elements corresponding to claims 1, 4 and 5, and functional molecular devices corresponding to claims 17-20, which are insulated gate field effect transistors.

[0113] Figure 4A and 4B are schematic structures showing π-electron conjugated molecules 1 and 31 constituting the functional molecular elements of Embodiments 1 and 3, respectively.

[0114] Figure 4A The part on the left is a schematic diagram showing the three-dimensional structure of the approximately flat circular skeleton 2 of the π-electron conjugated molecule 1 . In this figure, the carbon atoms, nitrogen atoms, oxygen atoms and metal ions M constituting the skeleton 2 are represented by spheres, the hydrogen atoms are omitted in the figure, and the side chain 3 is simplified. The π-electron conjugated molecule 1 has two opposing carbonyl groups (C=O) at the cleavage of the open porphyrin ring. Therefore, the skeleton 2 has an approximate...

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Abstract

Disclosed herein are a functional molecular element with a reduced contact resistance between the constituting molecule and the electrode, a method for production thereof, and a functional molecular device. The method consists of the following steps. A closely adhering molecular monolayer is formed on the surface of the electrodes from a pai-electron conjugated molecule (one species of linear tetrapyrrole) composed of the porphyrin-like nearly discoid skeleton and the flexible side chains (alkyl chains). A ¿ñ-electron conjugated molecule of the same species as the one or different species from the one is piled on the monolayer by pai-pai stacking to form the array structure. As the result of the foregoing steps, the pai-pailectron conjugated molecule constituting the first molecular layer of the array structure takes on such a configuration that the flexible side chains adsorb to the surface of the electrode and the discoid skeleton orients parallel to and adheres to the surface of the electrode. The second and subsequent molecular layers constituting the array structure have their piling direction controlled by the pai-pai mutual action.

Description

[0001] Related Application Cross Reference [0002] The present invention contains subject matter related to Japanese Patent Application No. JP2005-172629 filed in the Japan Patent Office on Jun. 13, 2005, the entire content of which is hereby incorporated by reference. technical field [0003] The invention relates to a novel functional molecular element capable of changing conductivity under the influence of an electric field and a manufacturing method thereof, and also relates to a functional molecular device. Background technique [0004] Recently, a new technology called nanotechnology has emerged, which is used to observe, manufacture and use 10 -8 m = microstructure on the order of 10 nanometers. [0005] The scanning tunneling microscope is an extremely precise microscope invented in the late 1980s that allows the observation and manipulation of individual atoms and molecules. [0006] Writing letters using atoms arranged on the surface of crystals has actually bee...

Claims

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Application Information

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IPC IPC(8): H01L51/00H01L51/05
CPCH01L51/105B82Y10/00H01L51/0595H01L51/0012G11C13/02G11C2213/14Y10S977/791H01L51/0558H01L51/0076G11C13/0014H01L51/0026H01L51/0077H10K71/191H10K71/40H10K85/731H10K85/30H10K10/484H10K10/84H10K10/701H01L21/18
Inventor 松居惠理子
Owner SONY CORP
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