CN100395173C - Light-positive controlling conductive device based on macro long multi-wall carbon nano tube bundle - Google Patents
Light-positive controlling conductive device based on macro long multi-wall carbon nano tube bundle Download PDFInfo
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- CN100395173C CN100395173C CNB2004101018155A CN200410101815A CN100395173C CN 100395173 C CN100395173 C CN 100395173C CN B2004101018155 A CNB2004101018155 A CN B2004101018155A CN 200410101815 A CN200410101815 A CN 200410101815A CN 100395173 C CN100395173 C CN 100395173C
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Abstract
The present invention discloses a light-positive controlling conductive device based on a macro long multi-wall carbon nano tube bundle, which relates to a photoelectric device. The device comprises a multi-wall carbon nano tube bundle filament, two metal electrodes and a quartz glass cover, i.e., both ends of the multi-wall carbon nano tube bundle filament are respectively connected with the two metal electrodes and then the multi-wall carbon nano tube bundle filament is sealed in the quartz glass cover. When the device works, the two metal electrodes are connected with an external circuit, and then the middle part of the multi-wall carbon nano tube bundle filament is directly irradiated by a light beam through the quartz glass cover. Experiments show that the total conductivity of the device can be increased when the intensity of the light beam is increased; the total conductivity of the device can be decreased when the intensity of the light beam is decreased. However, regardless of the intensity of an incident light beam, the change rate of the total conductivity of the device is always more than or equal to zero. The device has the advantages of simple structure, convenient fabrication and wide wavelength response range of incident light and can respond light with the wavelength of 405 nm to 1064 nm. The photoelectric response time of the device is less than 5 seconds. The device is a novel light controlling conductive device.
Description
Technical field
The present invention relates to a kind of design and making of important optoelectronics device, particularly about a kind of design and making of the light-positive conductivity apparatus spare based on macroscopical long multi-wall carbon nano-tube bundle.
Background technology
Utilize light-operated conductivity apparatus spare can lead the variation of (resistance) value, and then can change the size of the electrical quantities such as curtage in the device, realize purpose with optical means control electrical signal intensity by the electricity in the effective control device of optical instrument; Otherwise, also can be by measuring the size of electrical quantities in the light-operated conductivity apparatus spare, and then detect the intensity that incides the optical signalling on the light-operated conductivity apparatus spare, realization utilizes electrical method to measure the purpose of optical signal intensity, therefore, light-operated conductivity apparatus spare has broad application prospects in the photoelectronics field.Documents and materials show that CNT has special level structure and excellent electricity and optical property.The mature technology of synthetic at present preparation multi-walled carbon nano-tubes is varied, for example the inventor is at document [Zhang XF, Cao AY, Wei BQ, Li YH, Wei JQ, Xu CL, and Wu DH, CHEMICAL PHYSICS LETTERS 2002,362:285-290] in once reported technology of preparing about multi-walled carbon nano-tubes.But utilize macroscopical long multi-wall carbon nano-tube material design and make light-operated conductivity apparatus spare and have not yet to see report.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to make, fast a kind of light-positive conductivity apparatus spare of its photoelectric respone time simultaneously.Utilize this light-operated conductivity apparatus spare can lead the variation of (resistance) value, and then can change the size of the electrical quantities such as curtage in the device, realize purpose with optical means control electrical signal intensity by the electricity in the effective control device of optical instrument; Equally also can pass through to measure the size of electrical quantities in the light-operated conductivity apparatus spare, and then detect the intensity that incides the optical signalling on the light-operated conductivity apparatus spare, realize utilizing electrical method to measure the purpose of optical signal intensity.
Technical scheme of the present invention is as follows:
A kind of light-positive conductivity apparatus spare based on macroscopical long multi-wall carbon nano-tube bundle, it is characterized in that: this light-positive conductivity apparatus is made up of a multi-wall carbon nanometer tube bundle silk, two metal electrodes and quartz glass cover, described multi-wall carbon nanometer tube bundle silk is made of the long multi-wall carbon nanometer tube bundle of macroscopic view, the two ends of multi-wall carbon nanometer tube bundle silk are connected with two metal electrodes respectively, and are encapsulated in the described quartz glass cover.
Light-positive conductivity apparatus spare based on macroscopical long multi-wall carbon nano-tube bundle provided by the invention compared with prior art, has the following advantages and the high-lighting effect: have characteristics simple in structure, easy to make; And the lambda1-wavelength response range is wide, can respond the light of 405nm～1064nm wavelength, and its photoelectric respone time was a kind of novel light-operated conductivity apparatus spare less than 5 seconds simultaneously.Utilize the photoelectric response characteristic of this device, can design other novel optoelectronic sensor and photoelectric detector etc.
Description of drawings
Fig. 1 is the scanning electron microscope image of the used multi-wall carbon nanometer tube bundle of the present invention.
Fig. 2 is the schematic diagram of the light-operated conductivity apparatus spare of the present invention.
Among the figure: the 1-quartz glass cover; 2-CNT synnema; The 3-metal electrode; The 4-incident beam.
Fig. 3. be that the electricity of the light-operated conductivity apparatus spare of the present invention when laser shines led the response curve of variation to the time.
The specific embodiment
Light-positive conductivity apparatus spare based on macroscopical long multi-wall carbon nano-tube bundle provided by the invention comprises a multi-wall carbon nanometer tube bundle silk and two metal electrodes, and wherein the multi-wall carbon nanometer tube bundle silk is made of the long multi-wall carbon nanometer tube bundle of many macroscopic views.Metal electrode can adopt the electrode of materials such as nickel, silver, copper, tungsten.Preparation method is that the two ends with multi-wall carbon nanometer tube bundle silk 2 are connected with two metal electrodes 3 respectively, it is encapsulated in the quartz glass cover 1 then, just constitutes light-positive conductivity apparatus spare.During work, earlier the positive and negative electrode of metal electrode is connected with external circuit, utilize a light beam 4 by the middle part of quartz glass cover 1 direct irradiation then at CNT synnema 2, like this, total electricity of this device is led the regulation and control that can be subjected to incident beam intensity, promptly when beam intensity increased, total electricity of device is led can be increased; Otherwise when beam intensity reduced, total electricity of device was led and can be descended.But regardless of incident beam intensity size, total electricity of this device is led rate of change all the time more than or equal to zero, so just constitutes light-positive conductivity apparatus spare.
Can further understand the present invention below by specific embodiment.
The present invention adopts multi-wall carbon nanometer tube bundle silk 2 (as shown in Figure 1) to be connected (as shown in Figure 2) with metallic nickel electrode 3, constitutes light-positive conductivity apparatus spare.The nanotube bundle filament diameter is 240 μ m, and length is 2.01mm, and resistance is 59.4 Ω.Be respectively the focussed laser beam of 405nm, 532nm, 780nm and 1064nm when inciding the middle part of CNT synnema (as shown in Figure 2) with wavelength, become big total the electricity of device leads to increase with light intensity.Measurement result is calculated and to be shown by experiment: the laser that every watt of unit power wavelength is 405nm causes that the electricity of this device leads rate of change and be about 53.6%; The laser that every watt of unit power wavelength is 532nm causes that the electricity of this device leads rate of change and be about 47.3%; The laser that every watt of unit power wavelength is 780nm causes that the electricity of this device leads rate of change and be about 39.2%; The laser that every watt of unit power wavelength is 1064nm causes that the electricity of this device leads rate of change and be about 30.1%.Certainly, total electricity is led rate of change except that the power that depends on incident laser, also to be subjected to the area of light to account for the factors such as ratio of total surface area relevant with spot diameter, intensity distribution function, multi-wall carbon nanometer tube bundle wire connection, and therefore, concrete device needs independent calibration in use.Lead variation to the response curve (Fig. 3) of time as can be known from the electricity of this light-operated conductivity apparatus spare when laser shines, the photoelectric respone time of this device was less than 5 seconds.
Claims (1)
1. the light-positive conductivity apparatus spare based on macroscopical long multi-wall carbon nano-tube bundle is characterized in that; This light-positive conductivity apparatus spare is made up of a multi-wall carbon nanometer tube bundle silk, two metal electrodes and quartz glass cover, and described multi-wall carbon nanometer tube bundle silk is made of the long multi-wall carbon nanometer tube bundle of macroscopic view, and the length of multi-wall carbon nanometer tube bundle silk is 2.01mm; The two ends of described multi-wall carbon nanometer tube bundle silk are connected with two metal electrodes respectively, and are encapsulated in the described quartz glass cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101018155A CN100395173C (en) | 2004-12-24 | 2004-12-24 | Light-positive controlling conductive device based on macro long multi-wall carbon nano tube bundle |
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| CNB2004101018155A CN100395173C (en) | 2004-12-24 | 2004-12-24 | Light-positive controlling conductive device based on macro long multi-wall carbon nano tube bundle |
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| CN1640810A CN1640810A (en) | 2005-07-20 |
| CN100395173C true CN100395173C (en) | 2008-06-18 |
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| CNB2004101018155A Expired - Fee Related CN100395173C (en) | 2004-12-24 | 2004-12-24 | Light-positive controlling conductive device based on macro long multi-wall carbon nano tube bundle |
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| US11615900B2 (en) * | 2018-05-30 | 2023-03-28 | Raytheon Company | Method of virtually adhering materials to surfaces prior to encapsulation |
Citations (8)
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| US6808746B1 (en) * | 1999-04-16 | 2004-10-26 | Commonwealth Scientific and Industrial Research Organisation Campell | Multilayer carbon nanotube films and method of making the same |
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2004
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Patent Citations (8)
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| US20040169615A1 (en) * | 1997-01-16 | 2004-09-02 | Crowley Robert Joseph | Optical antenna array for harmonic generation, mixing and signal amplification |
| US20030205966A1 (en) * | 1999-02-21 | 2003-11-06 | Delta Optoelectronics, Inc. | Light emitting cell and method for emitting light |
| US6808746B1 (en) * | 1999-04-16 | 2004-10-26 | Commonwealth Scientific and Industrial Research Organisation Campell | Multilayer carbon nanotube films and method of making the same |
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| JP2001101987A (en) * | 1999-08-10 | 2001-04-13 | Delta Optoelectronics Inc | Luminous device, method of luminescence, and method for fabricating gate electrode |
| US20030001141A1 (en) * | 2001-04-26 | 2003-01-02 | Yi Sun | Method for dissolving nanostructural materials |
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