CN102019433A - Method for preparing core-shell type organic/inorganic composite silver nano-wire - Google Patents
Method for preparing core-shell type organic/inorganic composite silver nano-wire Download PDFInfo
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- CN102019433A CN102019433A CN2010105837207A CN201010583720A CN102019433A CN 102019433 A CN102019433 A CN 102019433A CN 2010105837207 A CN2010105837207 A CN 2010105837207A CN 201010583720 A CN201010583720 A CN 201010583720A CN 102019433 A CN102019433 A CN 102019433A
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Abstract
The invention relates to a method for preparing a core-shell type organic/inorganic composite silver nano-wire. The method mainly comprises the following steps of: (1) forming a nano-wire inner core by self-assembly of organic small molecules, wherein the nano-wire with the diameter of between 100 and 200nm is formed by self-assembly of the organic small molecules in aqueous solution; and (2) preparing the core-shell type composite silver nano-wire, wherein a certain amount of silver ion salt solution is added into nano-wire suspension which is prepared through self-assembly, the mixture is radiated by sunlight for a period of time after the mixture is radiated by ultraviolet (lambda max of 254nm, and a 400w high pressure mercury lamp), and silver ions are deposited on the surface of the organic nano-wire to form a silver nano shell layer with thickness of between 100 and 200nm, so that the core-shell type organic/inorganic composite silver nano-wire is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of nano wire, particularly relate to a kind of preparation method of hud typed organic/inorganic compound silver nanometer line.
Background technology
Metal nanometer line becomes the hot subject of nano materials research in recent years because of its potential application on electronics, optics and sensor.Wherein, the research to the argent nano wire causes that more people pay close attention to widely.The at present synthetic topmost method of metal nanometer line is a template, roughly is divided into hard template method and soft template method.The hard template that has been used for synthetic argent nano wire mainly comprises: Woelm Alumina plate (AAO) and polycarbonate membrane (PC), porous silica and CNT etc.Report about the synthesis of silver nano-wire of soft template is a lot, for example the polymeric membrane of polyvinyl alcohol (PVA), surfactant softex kw (CTBA) etc.On the basis that successfully prepares a series of metal nano wires, the preparation of the nano wire of multi-layer compound structure and sign have also caused widely to be paid close attention to.
The core-shell type material is that a class is a nuclear by the center particle, different component is the compound material that shell is formed, because it has characteristics such as Modulatory character and tailorability at aspects such as composition, structure, surface naturies, the preparation of this class material and application study have become the hot subject of the scientists concern of numerous ambits.Many characteristics such as method is simple, repetitive rate is high owing to having, foresight is good for template, product form homogeneous, stable performance are widely used in preparing the nucleocapsid structure material.The research of metal nanometer composite material mainly concentrates on the metal/oxide and the metal-containing polymer of core-shell nano structure.And the research of organic molecule/metal core shell mould composite nano-line seldom.
Summary of the invention
The objective of the invention is to provide a kind of preparation method of hud typed organic/inorganic compound silver nanometer line at the deficiencies in the prior art.A kind of structure of hud typed organic/inorganic compound silver nanometer line among the present invention, wherein core material is the nano wire of organic molecule self assembly formation, the shell material is a Nano Silver.
The invention provides a kind of preparation method of hud typed organic/inorganic compound silver nanometer line, it is characterized in that, comprise the steps:
(1) the organic molecule self assembly forms the nano wire inner core:
Under the room temperature, a certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the yellow nanowire suspended liquid of azobenzene;
(2) preparation of hud typed organic/inorganic compound silver nanometer line:
A certain amount of silver nitrate concentrated solution is added in the nanowire suspended liquid of azobenzene that step (1) makes, form mixing suspension; Utilize ultraviolet lighting after 1～1.5 hour, be placed on again under the daylight, placed 10～12 hours, obtain the suspension of hud typed organic/inorganic compound silver nanometer line.
In the nanowire suspended liquid of described azobenzene, the concentration of azobenzene is 2.5 * 10
-4M.
The mol ratio of described azobenzene and silver nitrate is 1: 5～1: 15.
Described ultraviolet light is λ
Max=254nm, power are the high-pressure sodium lamp of 400w.
In conjunction with soft template method and photochemical method, pattern that can fine regulation and control end product by the control process conditions, is easy to obtain the compound nano silver wire of organic-inorganic of controlled dimensions, preparation technology is simple, preparation process is not used any surfactant or synergist, has simplified last handling process; The nano wire sandwich layer is the organic molecule self-assembly, removes very easily by organic solvent, can obtain the one dimension nano silver wire of pure high length-diameter ratio.
Description of drawings
Fig. 1 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 1;
Fig. 2 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 2;
Fig. 3 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 3;
Fig. 4 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 4;
Fig. 5 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 5;
Fig. 6 is the stereoscan photograph of the prepared hud typed composite nano-line of embodiment 6;
Fig. 7 be prepared hud typed composite nano-line of embodiment 1, embodiment 2 and azobenzene template suspension uv-vis spectra;
Fig. 8 be prepared hud typed composite nano-line of embodiment 3, embodiment 4 and azobenzene template suspension uv-vis spectra;
Fig. 9 is the prepared hud typed composite nano-line of embodiment 5, embodiment 6 and the uv-vis spectra of azobenzene template suspension.
The specific embodiment
The several embodiment of various details, but content of the present invention is not limited to this fully.
Embodiment 1:
(1) the organic molecule self assembly forms the nano wire inner core
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 5; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1 hour, is placed under the daylight again, places 12 hours, obtains the suspension of the hud typed organic/inorganic compound silver nanometer line of yellow partially.
Pattern and spectral characterization: Fig. 1 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 1 condition, the result shows, Nano Silver be evenly distributed in the form of particle the organic molecule self assembly nano wire around, the diameter of self-assembly inner core is about 200nm, and the size of shell silver nano-grain is about 200-400nm.Among Fig. 7, A1 and A0 are respectively the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 1 condition and self-assembly template, have confirmed the formation of nano-Ag particles.
Embodiment 2:
(1) preparation of organic nano line inner core
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 5; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1.5 hours, is placed under the daylight again, places 10 hours, obtains the suspension of yellow green partially hud typed organic/inorganic compound silver nanometer line.
Pattern and spectral characterization: Fig. 2 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 2 conditions, the result shows, be wrapped in the even consolidation of Nano Silver the organic molecule self assembly nano wire around, the diameter of self-assembly inner core is about 200nm, and the thickness of the nano-silver layer of shell parcel is about 200nm.Among Fig. 7, A2 and A0 are the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 2 conditions and self-assembly template, have confirmed the formation of Nano Silver shell.
Embodiment 3:
(1) preparation of organic nano line inner core
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 10; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1 hour, is placed under the daylight again, places 12 hours, obtains the suspension of filemot partially hud typed organic/inorganic compound silver nanometer line.
Pattern and spectral characterization: Fig. 3 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 3 conditions, the result shows, the thickness of the nano-silver layer of shell parcel increases, and simultaneously, has formed a large amount of silver-colored particles in suspension.Among Fig. 8, B1 and B0 are the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 3 conditions and self-assembly template, have confirmed the formation of Nano Silver equally.
Embodiment 4
(1) preparation of organic nano line inner core:
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line:
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 10; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1.5 hours, is placed under the daylight again, places 10 hours, obtains the suspension of cervine hud typed organic/inorganic compound silver nanometer line.
Pattern and spectral characterization: Fig. 4 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 4 conditions, the result shows, the thickness of the nano-silver layer of shell parcel increases, simultaneously, in suspension, form a large amount of silver-colored particles, and had the part Nano Silver to reunite.Among Fig. 8, B2 and B0 are respectively the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 4 conditions and self-assembly template, have confirmed the formation of Nano Silver equally.
Embodiment 5
(1) preparation of organic nano line inner core:
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line:
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 15; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1 hour, is placed under the daylight again, places 12 hours, obtains the suspension of filemot hud typed organic/inorganic compound silver nanometer line.
Pattern and spectral characterization: Fig. 5 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 5 conditions, the result shows, the thickness of the nano-silver layer of shell parcel increases, and simultaneously, has formed a large amount of silver-colored particles in suspension.Among Fig. 9, C1 and C0 are respectively the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 5 conditions and self-assembly template, have confirmed the formation of Nano Silver equally.
Embodiment 6
(1) preparation of organic nano line inner core:
A certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the suspension of yellow azobenzene nano wire, wherein azobenzene concentration is 2.5 * 10
-4M;
(2) preparation of hud typed organic/inorganic compound silver nanometer line:
A certain amount of silver nitrate concentrated solution is added the nanowire suspended liquid of azobenzene that step (1) makes, and the mol ratio of azobenzene and silver nitrate is 1: 15; Utilize ultraviolet light (λ
Max=254nm, 400w high-pressure sodium lamp) illumination is 1.5 hours, is placed under the daylight again, places 10 hours, obtains the suspension of cervine hud typed organic/inorganic compound silver nanometer line.
Pattern and spectral characterization: Fig. 6 has shown the stereoscan photograph of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 6 conditions, the result shows, the thickness of the nano-silver layer of shell parcel increases, simultaneously, in suspension, form a large amount of silver-colored particles, and had the part Nano Silver to reunite.Among Fig. 9, C2 and C0 are respectively the uv-vis spectra comparison diagram of the water slurry of hud typed organic/inorganic compound silver nanometer line prepared under embodiment 6 conditions and self-assembly template, have confirmed the formation of Nano Silver equally.
Claims (4)
1. the preparation method of a hud typed organic/inorganic compound silver nanometer line is characterized in that, comprises the steps:
(1) the organic molecule self assembly forms the nano wire inner core:
Under the room temperature, a certain amount of azobenzene ethanol concentrated solution is gone in 5 ml waters by 100ul micro syringe fast injection, obtain the yellow nanowire suspended liquid of azobenzene;
(2) preparation of hud typed organic/inorganic compound silver nanometer line:
A certain amount of silver nitrate concentrated solution is added in the nanowire suspended liquid of azobenzene that step (1) makes, form mixing suspension; Utilize ultraviolet lighting after 1～1.5 hour, be placed on again under the daylight, placed 10～12 hours, obtain the suspension of hud typed organic/inorganic compound silver nanometer line.
2. the preparation method of a kind of hud typed organic/inorganic compound silver nanometer line according to claim 1 is characterized in that, in the nanowire suspended liquid of described azobenzene, the concentration of azobenzene is 2.5 * 10
-4M.
3. the preparation method of a kind of hud typed organic/inorganic compound silver nanometer line according to claim 1 is characterized in that, the mol ratio of described azobenzene and silver nitrate is 1: 5～1: 15.
4. the preparation method of a kind of hud typed organic/inorganic compound silver nanometer line according to claim 1 is characterized in that, described ultraviolet light is λ
Max=254nm, power are the high-pressure sodium lamp of 400w.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774807A (en) * | 2012-07-05 | 2012-11-14 | 上海大学 | Method for preparing core shell type nanowire array raman scattering reinforcement substrate |
| CN106378448A (en) * | 2016-09-20 | 2017-02-08 | 杨海波 | Silver coating surface modification method of nickel powder for circuit protection device material |
-
2010
- 2010-12-11 CN CN2010105837207A patent/CN102019433A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774807A (en) * | 2012-07-05 | 2012-11-14 | 上海大学 | Method for preparing core shell type nanowire array raman scattering reinforcement substrate |
| CN106378448A (en) * | 2016-09-20 | 2017-02-08 | 杨海波 | Silver coating surface modification method of nickel powder for circuit protection device material |
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Application publication date: 20110420 |