CN103692763A - Peeling method of two-dimensional layered nano material - Google Patents
Peeling method of two-dimensional layered nano material Download PDFInfo
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- CN103692763A CN103692763A CN201310659131.6A CN201310659131A CN103692763A CN 103692763 A CN103692763 A CN 103692763A CN 201310659131 A CN201310659131 A CN 201310659131A CN 103692763 A CN103692763 A CN 103692763A
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Abstract
The invention provides a peeling method of a two-dimensional layered nano material. The peeling method comprises the following steps of: dissolving an amphiphilic surface active agent in an organic solvent, and carrying out ultrasonic water bathing for 0.5-2 hours to obtain mixed solution, wherein the organic solvent is one or more in a mercaptan solvent, octadecylamine, isopropanol, a sulfur solvent, an amino-acid solvent, a polyamino solvent and a polyalcohol solvent; adding a transition metal compound to be peeled into the mixed solution, carrying out 1000-1800w ultrasonic treatment and 1500-5000rpm centrifugal treatment to remove supernatant, collecting precipitates, filtering and drying to obtain solid, i.e., the peeled two-dimensional layered nano material. The peeling method provided by the invention has the advantages that the process is simple, the yield is higher, one-layer, double-layer and multi-layer controllable nano materials with two-dimensional complete crystal surface structures can be obtained, the industrial production with low cost is easily implemented and the problem of secondary pollution to the environment is avoided.
Description
Technical field
The present invention relates to novel nano-material field, particularly relate to a kind of stripping means of two-dimensional layer nano material.
Background technology
Two-dimensional nano material relies on its unique physicochemical properties, in fields such as semiconductor, microelectronic component and biologic medicals, has immeasurable application potential, has caused many researchers' concern in recent years.If single-layer graphene is because its special electricity, optics, calorifics and engineering properties become one of study hotspot of current field of nanometer material technology.Recent research discovery, other two-dimensional layer nano materials that possess similar Graphene have very unique physicochemical properties equally.The compound that particularly some transition metal YuⅥ A families form, as: MoS
2, WS
2, MoSe
2, WSe
2deng, these compounds all form " sandwich " structure by two-layer Ⅵ A family's element and middle one deck transition metal covalent bond, and by Van der Waals force, attract to form piece type crystal between different " sandwich " interlayers.And the single or multiple lift two-dimensional layered structure nano material that how to obtain high yield from these crystal is the large technical barrier facing at present.
At present, the stripping means of this class stratified material has mechanical adhesive tape to tear point-score, the ultrasonic stripping method of organic solvent and chemical stripping method.Aforementioned two kinds of methods are difficult to obtain two-dimension single layer, the multi-layer nano material of high yield; And chemical stripping method is very consuming time and chemical reagent operating environment used is had relatively high expectations, method security is lower; These three kinds of methods do not possess the potentiality of suitability for industrialized production, therefore, are not all the Perfected process that obtains two-dimension single layer, multi-layer nano material.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of stripping means of two-dimensional layer nano material, the method that this stripping means adopts amphiphilic surfactant to combine with one or more organic solvents, by acting synergistically to realize peeling off two-dimensional layer material, obtain the nano material of the controlled complete crystal plane structure of two dimension of individual layer, bilayer and multilayer, the method technique is simple to operation, and productive rate is higher, easily realizes low-cost industrialization and produces and environment is not produced to secondary pollution problem.
The embodiment of the present invention provides a kind of stripping means of two-dimensional layer nano material, comprises the following steps:
Amphiphilic surfactant is dissolved in organic solvent, and in water-bath ultrasonic device, 750w～1200w is ultrasonic 0.5～2 hour, obtains mixed solution, and the concentration of described amphiphilic surfactant in described organic solvent is 0.1mg～10mg/mL; Described amphiphilic surfactant is graphene oxide, hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride; Described organic solvent is one or more in thio-alcohol solvent, octadecylamine, isopropyl alcohol, sulphur kind solvent, amino acids solvent, poly-amino solvent and polyalcohols solvent;
Transistion metal compound material to be stripped is joined in above-mentioned mixed solution under 1000～1800w ultrasonic 2～8 hours; After ultrasonic, with 1500～5000rpm centrifugal 20～60 minutes, remove supernatant, collecting precipitation, filters, and in 60～100 ℃ of vacuum drying, obtains solids, the two-dimensional layer nano material after described solids is peeled off.
Two-dimensional layer nano material after described solids is peeled off is head product, can further comprise following purification process.
Preferably, when described amphiphilic surfactant is hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride, further comprise, after described removal supernatant, adopt deionized water repeatedly to wash described centrifugal gained and precipitate to remove described hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride.While adopting hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride, gained solids comprises individual layer, bilayer and the multilayer two-dimension stratified nano materials after peeling off.
Preferably, when described amphiphilic surfactant is graphene oxide, further comprise, gained solids is dissolved in deionized water, be placed in water-bath ultrasonic device 750w～1200w after ultrasonic 0.5～2 hour, obtain mixed dispersion liquid, collect and float on the surface layer film layer in described mixed dispersion liquid, individual layer or double-deck two-dimensional layer nano material after being peeled off after being dried; And collect the bottom solid in described mixed dispersion liquid, the multilayer two-dimension stratified nano materials after being peeled off after 60～100 ℃ of vacuum drying.
Preferably, described thio-alcohol solvent is lauryl mercaptan;
Described sulphur kind solvent is dodecyl thiosulfonic acid sodium;
Described amino acids solvent is glycine;
Described poly-amino solvent is polyurethane-urea;
Described polyalcohols solvent is polyvinyl alcohol.
Preferably, described transistion metal compound material to be stripped is transistion metal compound molybdenum bisuphide MoS
2, tungsten disulfide WS
2, two selenizing molybdenum MoSe
2or two selenizing tungsten WSe
2.
Preferably, the concentration of described transistion metal compound material to be stripped in mixed solution is 1～10mg/mL.
Transistion metal compound MoS
2, WS
2, MoSe
2or WSe
2the unique physicochemical properties that possess similar Graphene.These compounds form " sandwich " structure by two-layer Ⅵ A family's element and middle one deck transition metal covalent bond, and by Van der Waals force, attract to form piece type crystal between different " sandwich " interlayers.The embodiment of the present invention is utilized the synergy of amphiphilic surfactant and organic solvent, can effectively break the Van der Waals force between different " sandwich " interlayers, thereby realizes transistion metal compound MoS
2, WS
2, MoSe
2, WSe
2effectively peel off, therefore due to the method mild condition, can obtain obtaining the nano material of the controlled complete crystal plane structure of two dimension of individual layer, bilayer and multilayer.
Wherein, there are a large amount of oxygen-containing functional groups with covalent bond form bonding on graphene oxide surface, introduce and have hydroxyl and epoxy radicals, and edge is connected with carboxyl and carbonyl as surface.It is good amphipathic and possess the functional characteristic of surfactant that these abundant functional groups have graphene oxide.
Due to transistion metal compound MoS
2, WS
2, MoSe
2, WSe
2material is water insoluble, therefore need to find a kind of solvent can dissolve this transistion metal compound material better, therefore after the present invention chooses amphiphilic surfactant and mixes mutually with organic solvent, again transistion metal compound material to be stripped is added wherein, by acting synergistically simultaneously by means of strong ultrasonic and centrifugal condition, to realize peeling off above-mentioned transistion metal compound material.
Preferably, the concrete operations of described collection surface layer film layer are: the silicon sheet of surfacing cleaning is placed in to described mixed dispersion liquid, and the surface layer film layer that makes to float in described mixed dispersion liquid is hung on silicon face.
Preferably, described filter operation adopts polytetrafluoroethylene (PTFE) filter membrane.
Described graphene oxide can be commercially available or prepares by existing method.
Preferably, described graphene oxide adopts improved Hummers legal system standby, be specially: powdered graphite is joined in the nitric acid of mass concentration 68% and the sulfuric acid mixed acid that 1:6 is mixed to form by volume that mass concentration is 98%, after ice bath magnetic agitation 30 minutes, at 3～6 ℃, slowly add potassium permanganate, after adding completely, described potassium permanganate reaction temperature is risen to 30～45 ℃, stirring reaction 2 hours, after completion of the reaction, add the unnecessary potassium permanganate of hydrogen peroxide removal, by last gained reactant liquor with 12000rpm centrifugal 30 minutes, the dilution of gained precipitate with deionized water, be filtered to filtrate and be neutral, described being deposited in after 60 ℃ of vacuum drying, obtain graphene oxide.
Preferably, described powdered graphite carries out following pretreatment: powdered graphite is joined in 80 ℃ of sulfuric acid solutions, after magnetic agitation 4 hours, stop heating, and add deionized water to dilute standing 8 hours, adopt again polytetrafluoroethylene (PTFE) filter membrane to filter, by 80～100 ℃ of vacuum drying of gained filter residue, obtain pretreated powdered graphite.
The stripping means of the two-dimensional layer nano material that the embodiment of the present invention provides, the method that this stripping means adopts amphiphilic surfactant to combine with one or more organic solvents, by acting synergistically to realize peeling off two-dimensional layer material, the method technique is simple to operation, cost is low, productive rate is higher, compare current chemical solvent method, mechanical stripping method and chemical vapour deposition technique etc. and have obvious advantage, can obtain the complete crystal plane structure nano material of the controlled two dimension of individual layer, bilayer and multilayer, easily realize industrialization and produce.
The stripping means of the two-dimensional layer nano material based on the embodiment of the present invention, be expected to realize the extensive industrialization stripping technology of all two-dimensional layered structure materials technology, for all kinds of individual layers or double-deck two-dimensional layer material, the application in catalysis, electricity and bio-medical field lays the foundation.
The embodiment of the present invention also provides the nano material of the two-dimensional layer after peeling off of being prepared by above-mentioned stripping means.Described two-dimensional layer nano material comprises individual layer, bilayer and multilayer two-dimension stratified nano materials.
The individual layer that prepared by the embodiment of the present invention after peeling off or double-deck two-dimensional layer nano material and multilayer two-dimension stratified nano materials can be applicable to the fields such as semiconductor, microelectronic component, biologic medical.
The advantage of the embodiment of the present invention will partly be illustrated in the following description, and a part is apparent according to description, or can know by the enforcement of the embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the individual layer molybdenum bisuphide transmission electron microscope details in a play not acted out on stage, but told through dialogues figure of the embodiment of the present invention one;
Fig. 2 is the individual layer molybdenum bisuphide transmission electron microscope light field figure of the embodiment of the present invention one;
Fig. 3 is the multilayer molybdenum bisuphide transmission electron microscope figure of the embodiment of the present invention one;
Fig. 4 is the double-deck molybdenum bisuphide transmission electron microscope High-Resolution Map of the embodiment of the present invention one;
Fig. 5 is the individual layer tungsten disulfide transmission electron microscope figure of the embodiment of the present invention two;
Fig. 6 is the multilayer tungsten disulfide transmission electron microscope figure of the embodiment of the present invention two;
Fig. 7 is the individual layer tungsten disulfide transmission electron microscope High-Resolution Map of the embodiment of the present invention two.
The specific embodiment
The following stated is the preferred embodiment of the embodiment of the present invention; should be understood that; for those skilled in the art; do not departing under the prerequisite of embodiment of the present invention principle; can also make some improvements and modifications, these improvements and modifications are also considered as the protection domain of the embodiment of the present invention.
Divide a plurality of embodiment to be further detailed the embodiment of the present invention below.The embodiment of the present invention is not limited to following specific embodiment.In the scope of constant principal right, carrying out change that can be suitable is implemented.
Embodiment mono-
A kind of molybdenum bisuphide (MoS
2) stripping means, comprise the steps:
(1) Graphitic pretreatment: by 100mg powdered graphite (Sigma Aldrich, 1 μ m) add in 80 ℃ of sulfuric acid solutions of 10mL, magnetic agitation keeps stopping for 4 hours heating, in mixed solution, slowly add the dilution of 2L deionized water, after standing 8 hours, then filter (employing PTFE filter membrane, diameter 47mm, Millipore filter), to remove sulfuric acid solution, after filter, 100 ℃ of vacuum drying of solid are standby;
The preparation of graphene oxide: above-mentioned pretreated powdered graphite (5g) is joined in the mixed solution of nitric acid (33mL, 68%) and sulfuric acid (200mL, 98%), ice bath magnetic agitation is after 30 minutes, by 30g potassium permanganate (KMnO
4) slowly add in said mixture and maintain the temperature at 5 ℃ of left and right, after adding completely, potassium permanganate reaction temperature is risen to 40 ℃, stirring reaction 2 hours, getting 20mL hydrogen peroxide (10%) is added in above-mentioned reactant liquor to remove unnecessary potassium permanganate again, by the centrifugal 30min of end reaction thing 12000rpm, remove supernatant, gained precipitation adds deionized water 450mL dilution, refilter and (adopt PTFE filter membrane, diameter 47mm, Millipore filter), until the pH of filtrate is neutral, by 60 ℃ of vacuum drying of filter residue, obtain graphene oxide.
(2) the above-mentioned graphene oxide 50mg making is dissolved in 500mL isopropyl alcohol (IPA), be placed in the ultrasonic 0.5h of water-bath ultrasonic device (Branson2510EMT) 750w, obtain mixed solution, then take 500mg molybdenum disulfide powder (Sigma Aldrich, 1 μ m) add in above-mentioned mixed solution, then be placed in sonde-type and strongly disperse Ultrasound Instrument (Vibra-Cell
tMvCX1500W) in, ultrasonic 6h;
After ultrasonic, by the above-mentioned mixed solution obtaining with 3000rpm centrifugal 30 minutes, supernatant is removed, collecting precipitation product is (PTFE filter membrane after filtration, diameter 47mm, Millipore filter), then after vacuum drying (60 ℃), the solids that acquisition graphene oxide mixes with molybdenum bisuphide interlayer;
(3) above-mentioned gained solids is dissolved in deionized water, be placed in the ultrasonic 1h of water-bath ultrasonic device (Branson 2510EMT) 750w, obtain mixed dispersion liquid, finally because having strong hydrophily, graphene oxide suspends in water, hydrophobic individual layer or double-deck molybdenum disulfide nano sheet can float on the upper surface of water, form surface layer film layer as thin as a wafer, and a large amount of multilayer molybdenum disulfide nano sheet will be deposited on deionized water bottom and form upper and lower lamination; With the silicon sheet of surfacing cleaning, be placed in mixed dispersion liquid water the individual layer of surfactant suspension or double-deck molybdenum bisuphide are hung on to silicon face gently, can obtain individual layer or the double-deck molybdenum disulfide nano sheet after peeling off after dry; Multilayer molybdenum disulfide nano sheet after again the residue after removing upper strata graphite oxide aqueous solution being peeled off filters (PTFE filter membrane, diameter 47mm, Millipore filter), obtain the multilayer molybdenum disulfide nano sheet after peeling off then after vacuum drying (60 ℃).
The present embodiment products therefrom is carried out to transmission electron microscope observation, and as shown in Figure 1 to 4, wherein, Fig. 1 is the transmission electron microscope details in a play not acted out on stage, but told through dialogues figure of individual layer molybdenum bisuphide to result; Fig. 2 is the transmission electron microscope light field figure of individual layer molybdenum bisuphide; Fig. 3 is the transmission electron microscope figure of multilayer molybdenum bisuphide; Fig. 4 is the transmission electron microscope High-Resolution Map of double-deck molybdenum bisuphide.As can be seen from the figure: stripping means of the present invention can be peeled off into individual layer by molybdenum bisuphide block completely, the molybdenum disulfide nano sheet of double-deck and many layer structures, and the individual layer molybdenum bisuphide atom hexagonal structure after peeling off is complete, there is no defect; From Fig. 3, observable goes out the number of plies of the mutual lamination of multilayer molybdenum bisuphide, but multi-layer nano sheet exists edge defect phenomenon, may be that several layers of nanometer sheet produce due to staggered floor when overlapping.
Embodiment bis-
A kind of tungsten disulfide (WS
2) stripping means, comprise the steps:
(1) Graphitic pretreatment: by 100mg powdered graphite (Sigma Aldrich, 1 μ m) add in 80 ℃ of sulfuric acid solutions of 10mL, magnetic agitation keeps stopping for 4 hours heating, in mixed solution, slowly add the dilution of 2L deionized water, after standing 8 hours, then filter (employing PTFE filter membrane, diameter 47mm, Millipore filter), to remove sulfuric acid solution, after filter, 100 ℃ of vacuum drying of solid are standby;
The preparation of graphene oxide: above-mentioned pretreated powdered graphite (5g) is joined in the mixed solution of nitric acid (33mL, 68%) and sulfuric acid (200mL, 98%), ice bath magnetic agitation is after 30 minutes, by 30g potassium permanganate (KMnO
4) slowly add in said mixture and maintain the temperature at 5 ℃ of left and right, after adding completely, potassium permanganate reaction temperature is risen to 40 ℃, stirring reaction 2 hours, getting 20mL hydrogen peroxide (10%) is added in above-mentioned reactant liquor to remove unnecessary potassium permanganate again, by the centrifugal 30min of end reaction thing 12000rpm, remove supernatant, gained precipitation adds deionized water 450mL dilution, refilter and (adopt PTFE filter membrane, diameter 47mm, Millipore filter), until the pH of filtrate is neutral, by 60 ℃ of vacuum drying of filter residue, obtain graphene oxide.
(2) the above-mentioned graphene oxide 5g making is dissolved in 500mL lauryl mercaptan (1-dodecanethiol), is placed in the ultrasonic 2h of water-bath ultrasonic device (Branson2510EMT) 1200w, obtain mixed solution, then take 5g tungsten disulfide (WS
2) powder (Sigma Aldrich, 1 μ m) adds in above-mentioned mixed solution, then be placed in sonde-type and strongly disperse Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution obtaining with 5000rpm centrifugal 40 minutes, supernatant is removed, collecting precipitation product is (PTFE filter membrane after filtration, diameter 47mm, Millipore filter), then after vacuum drying (100 ℃), the solids that acquisition graphene oxide mixes with tungsten disulfide interlayer;
(3) above-mentioned gained solids is dissolved in deionized water, be placed in the ultrasonic 2h of water-bath ultrasonic device (Branson 2510EMT) 1200w, obtain mixed dispersion liquid, finally because having strong hydrophily, graphene oxide suspends in water, hydrophobic individual layer or double-deck tungsten disulfide nano slices can float on the upper surface of water, form surface layer film layer as thin as a wafer, and a large amount of multilayer tungsten disulfide nano slices will be deposited on deionized water bottom and form upper and lower lamination; With the silicon sheet of surfacing cleaning, be placed in mixed dispersion liquid water the individual layer of surfactant suspension or double-deck tungsten disulfide are hung on to silicon face gently, can obtain individual layer or the double-deck tungsten disulfide nano slices after peeling off after dry; Multilayer tungsten disulfide nano slices after again the residue after removing upper strata graphite oxide aqueous solution being peeled off filters (PTFE filter membrane, diameter 47mm, Millipore filter), obtain the multilayer tungsten disulfide nano slices after peeling off then after vacuum drying (100 ℃).
The present embodiment products therefrom is carried out to transmission electron microscope observation, and result is as shown in Fig. 5～Fig. 7, and wherein, Fig. 5 is the transmission electron microscope figure of individual layer tungsten disulfide; Fig. 6 is the transmission electron microscope figure of multilayer tungsten disulfide; Fig. 7 is the transmission electron microscope High-Resolution Map of individual layer tungsten disulfide.As can be seen from the figure, tungsten disulfide nano slices size less (100～300nm) after being stripped from, several layers of tungsten disulfide nano slices are overlapping, but still can observe each layer of edge and the estimation number of plies, High-Resolution Map 7 shows its complete hexagonal lattice structure, almost zero defect, absolutely proves that this method stripped laminar tungsten disulfide nano slices can keep its original atomic lattice and physical and chemical performance, and can obtain individual layer and the several layers of nanometer sheet that relative size is less.
Embodiment tri-
A kind of tungsten disulfide (WS
2) stripping means, comprise the steps:
2g octadecyl alkyl dimethyl ammonium chloride (Sigma Aldrich) is joined in 500mL isopropyl alcohol (IPA), be placed in the ultrasonic 2h of water-bath ultrasonic device (Branson2510EMT) 750w, obtain mixed solution, then take 2g tungsten disulfide (WS
2) powder (Sigma Aldrich, 1 μ m) adds in above-mentioned mixed solution, then be placed in sonde-type and strongly disperse Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution obtaining with 1500rpm centrifugal 60 minutes, supernatant is removed, and repeatedly with the centrifugal gained of washed with de-ionized water, precipitate (three to four times) to remove octadecyl alkyl dimethyl ammonium chloride completely, last collecting precipitation product is (PTFE filter membrane, diameter 47mm, Millipore filter) after filtration, after vacuum drying (100 ℃), obtain tungsten disulfide laminar nano sheet again.
Embodiment tetra-
A kind of molybdenum bisuphide (MoS
2) stripping means, comprise the steps:
100mg hexadecyldimethyl benzyl ammonium ammonium bromide (Sigma Aldrich) is joined in 500mL isopropyl alcohol (IPA), concentration is 0.5mg/mL, be placed in the ultrasonic 2h of water-bath ultrasonic device (Branson2510EMT) 1200w, obtain mixed solution, then take 1g molybdenum bisuphide (MoS
2) powder (Sigma Aldrich, 1 μ m) adds in above-mentioned mixed solution, then be placed in sonde-type and strongly disperse Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution obtaining with 5000rpm centrifugal 40 minutes, supernatant is removed, and repeatedly with the centrifugal gained of washed with de-ionized water, precipitate (three to four times) to remove hexadecyldimethyl benzyl ammonium ammonium bromide completely, last collecting precipitation product is (PTFE filter membrane, diameter 47mm, Millipore filter) after filtration, after vacuum drying (100 ℃), obtain molybdenum bisuphide laminar nano sheet again.
Claims (10)
1. a stripping means for two-dimensional layer nano material, is characterized in that, comprises the following steps:
Amphiphilic surfactant is dissolved in organic solvent, and in water-bath ultrasonic device, 750w～1200w is ultrasonic 0.5～2 hour, obtains mixed solution, and the concentration of described amphiphilic surfactant in described organic solvent is 0.1mg～10mg/mL; Described amphiphilic surfactant is graphene oxide, hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride; Described organic solvent is one or more in thio-alcohol solvent, octadecylamine, isopropyl alcohol, sulphur kind solvent, amino acids solvent, poly-amino solvent and polyalcohols solvent;
Transistion metal compound material to be stripped is joined in above-mentioned mixed solution under 1000～1800w ultrasonic 2～8 hours; After ultrasonic, with 1500～5000rpm centrifugal 20～60 minutes, remove supernatant, collecting precipitation, filters, and in 60～100 ℃ of vacuum drying, obtains solids, the two-dimensional layer nano material after described solids is peeled off.
2. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, when described amphiphilic surfactant is hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride, further comprise, after described removal supernatant, adopt deionized water repeatedly to wash described centrifugal gained and precipitate to remove described hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyl alkyl dimethyl ammonium chloride.
3. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, when described amphiphilic surfactant is graphene oxide, further comprise, gained solids is dissolved in deionized water, is placed in water-bath ultrasonic device 750w～1200w after ultrasonic 0.5～2 hour, obtain mixed dispersion liquid, collection floats on the surface layer film layer in described mixed dispersion liquid, individual layer or double-deck two-dimensional layer nano material after being peeled off after being dried; And collect the bottom solid in described mixed dispersion liquid, the multilayer two-dimension stratified nano materials after being peeled off after 60～100 ℃ of vacuum drying.
4. the stripping means of two-dimensional layer nano material as claimed in claim 1, is characterized in that, described thio-alcohol solvent is lauryl mercaptan;
Described sulphur kind solvent is dodecyl thiosulfonic acid sodium;
Described amino acids solvent is glycine;
Described poly-amino solvent is polyurethane-urea;
Described polyalcohols solvent is polyvinyl alcohol.
5. the stripping means of two-dimensional layer nano material as claimed in claim 1, is characterized in that, described transistion metal compound material to be stripped is MoS
2, WS
2, MoSe
2or WSe
2.
6. the stripping means of two-dimensional layer nano material as claimed in claim 1, is characterized in that, the concentration of described transistion metal compound material to be stripped in mixed solution is 1～10mg/mL.
7. the stripping means of two-dimensional layer nano material as claimed in claim 3, it is characterized in that, the concrete operations of described collection surface layer film layer are: the silicon sheet of surfacing cleaning is placed in to described mixed dispersion liquid, and the surface layer film layer that makes to float in described mixed dispersion liquid is hung on silicon face.
8. the stripping means of two-dimensional layer nano material as claimed in claim 1, is characterized in that, described filter operation adopts polytetrafluoroethylene (PTFE) filter membrane.
9. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, described graphene oxide adopts improved Hummers legal system standby, be specially: powdered graphite is joined in the nitric acid of mass concentration 68% and the sulfuric acid mixed acid that 1:6 is mixed to form by volume that mass concentration is 98%, after ice bath magnetic agitation 30 minutes, at 3～6 ℃, slowly add potassium permanganate, after adding completely, described potassium permanganate reaction temperature is risen to 30～45 ℃, stirring reaction 2 hours, after completion of the reaction, add the unnecessary potassium permanganate of hydrogen peroxide removal, by last gained reactant liquor with 12000rpm centrifugal 30 minutes, the dilution of gained precipitate with deionized water, be filtered to filtrate and be neutral, described being deposited in after 60 ℃ of vacuum drying, obtain graphene oxide.
10. the two-dimensional layer nano material that the stripping means as described in as arbitrary in claim 1～9 prepares after peeling off.
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