CN110075368B - Preparation method of anti-sticking film layer on surface of electrotome - Google Patents
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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- A—HUMAN NECESSITIES
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
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Abstract
The invention discloses a preparation method of an anti-sticking film layer on the surface of an electrotome, which comprises the steps of preparing a priming layer, arranging a conductive layer on the priming layer, and arranging an anti-sticking layer on the conductive layer to prepare the anti-sticking film layer; the bottom layer is an Ag layer, the conductive film layer is a mixed layer of SiO2 and Ag, and the anti-sticking layer is an Au or Ag film layer; preparing a SiO2 and Ag mixed layer with a nano-scale columnar matrix on the electrotome, and locking a large amount of air molecules between nano-columns of the mixed layer to ensure that most of the contact surface between small intestine tissues and the electrotome is air, namely generating an air cushion between the small intestine tissues and the electrotome, thereby achieving the purpose of adhesion prevention; the anti-sticking film layer prepared by the preparation method has low resistivity, high temperature resistance and oxidation resistance, meets the thermal shock test, and has small anti-sticking attenuation; in the process of hemostasis of the electrotome, the anti-sticking film layer prepared by the preparation method of the anti-sticking film layer on the surface of the electrotome ensures that the electrotome can not be adhered with a mucosa, avoids damaging the mucosa and ensures the hemostasis effect.
Description
Technical Field
The invention relates to a preparation method of a film layer, in particular to a preparation method of an anti-sticking film layer on the surface of an electrotome.
Background
The cutting principle of the high-frequency electric knife for surgical operation is to cut human tissues by using high-frequency pulse electric sparks. The specific working principle is as follows: two poles of the high-frequency pulse power supply are respectively connected with the electrotome and the human body, and when pulse voltage is applied between the electrotome and the small intestine tissue, the body fluid at the closest point is punctured to form a discharge channel. Because the sectional area of the channel is very small, the discharge time is very short, so that the energy is highly concentrated, and the instantaneous high temperature generated in the discharge area is enough to fuse local small intestinal tissues. After the first pulse is finished, and after a short time interval, the second pulse breaks down and discharges at the closest point between the two electrodes to melt deeper small intestinal tissues. The high frequency is circulated repeatedly in this way, and finally the effect of cutting the target tissue is achieved.
In the pulse discharging process of the electrotome, a part of electric energy is released to the electrotome, and the electric energy is quickly converted into heat energy, so that the temperature of the electrotome rises. Meanwhile, non-contact discharge is carried out between the electrotome and the small intestine tissue, and the heat energy of the electrotome cannot be absorbed by the small intestine tissue; because the volume of the electrotome is very small, the thermal capacity is also very small, and the temperature of the electrotome can reach over 800 ℃ (reddening) under the condition of no external cooling liquid.
When the reddish electrotome comes into contact with the small intestine tissue again, the fat and protein can be carbonized and denatured instantaneously; the carbonized and denatured products have strong adhesive force and can firmly stick the electrotome, and when the electrotome is forcibly pulled out, a part of good small intestinal tissue is often torn out to generate a new wound, so that the surgeon needs to stop bleeding of the new wound by the electrotome again, but the electrotome can be stuck again.
In order to solve the problem of adhesion of the electrotome, an anti-adhesion coating is prepared on the electrotome and is one of effective solutions. At present, most electrotomes on the market adopt gold plating, silver plating and other inert metals, but the effect is not good.
Therefore, it is highly desirable to prepare a film layer disposed on the surface of the electrode tip of the electrotome, which can better solve the problem of adhesion between the electrode tip of the electrotome and the small intestine tissue.
Disclosure of Invention
The invention aims to provide a preparation method of an anti-sticking film layer on the surface of an electrotome, and aims to solve the problems that the existing hemostatic electrode has poor anti-sticking effect on small intestinal tissues due to the fact that the surface of the existing hemostatic electrode is plated with gold or silver and other inert metals.
The technical scheme of the invention is as follows: a preparation method of an anti-sticking film layer on the surface of an electrotome, wherein the prepared anti-sticking film layer is applied to a high-frequency electrotome, and the preparation method specifically comprises the following steps:
a1: preparing a bottoming layer;
a2: preparing a conductive layer of a nano-scale columnar matrix on the surface of the priming layer;
a3: and arranging an anti-sticking layer on the top end surface of the nano column of the conducting layer to prepare the anti-sticking film layer.
The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the priming layer is an Ag material layer.
The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the conducting layer adopts SiO with a nano-scale columnar matrix2And a nano Ag mixed layer.
The preparation method of the anti-sticking film layer on the surface of the electrotome comprises the step of preparing an anti-sticking layer by using an Ag material layer or an Au material layer.
The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the SiO2The nano Ag mixed layer specifically comprises the following components: 12-16% of tetraethyl orthosilicate; water is less than or equal to 1 percent; HCL is less than or equal to 1 percent; NH4OH is less than or equal to 1 percent; 1-5% of nano silver paste; the balance of absolute ethyl alcohol.
The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the SiO2The mixed layer with the nano Ag is prepared by a sol-gel method.
The preparation method of the anti-sticking film layer on the surface of the electrotome comprises the following steps:
a 1: slowly and dropwise adding tetraethyl orthosilicate into water, hydrochloric acid, NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate;
a 2: adding nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution;
a 3: and fully stirring the mixed solution, and performing ultrasonic dispersion to obtain the wet mixed gel of SiO2 and nano Ag.
The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the granularity of the nano silver paste is 20-30 nm.
The preparation method of the electrotome surface anti-sticking film layer comprises the step a2, wherein the volume ratio of the nano Ag is 5-20%.
The preparation method of the anti-sticking film layer on the surface of the electrotome comprises the steps of firstly plating a priming layer on the surface of the hemostatic head, then preparing a conductive layer of a nano-scale columnar matrix on the surface of the priming layer by using a sol-gel method, and finally plating an anti-sticking layer on the top end surface of a nano column of the conductive layer.
The invention has the beneficial effects that: the invention provides a preparation method of an anti-sticking film layer on the surface of an electrotome, which comprises the steps of preparing a base layer, arranging a conductive layer on the base layer, and arranging an anti-sticking layer on the conductive layer to prepare the anti-sticking film layer; the bottom layer is an Ag layer, the conductive film layer is a mixed layer of SiO2 and Ag, and the anti-sticking layer is an Au or Ag film layer; preparing a SiO2 and Ag mixed layer with a nano-scale columnar matrix on the electrotome, and locking a large amount of air molecules between nano-columns of the mixed layer to ensure that most of the contact surface between small intestine tissues and the electrotome is air, namely generating an air cushion between the small intestine tissues and the electrotome, thereby achieving the purpose of adhesion prevention; the anti-sticking film layer prepared by the preparation method of the anti-sticking film layer on the surface of the electrotome has low resistivity, is resistant to high temperature and oxidation, meets a thermal shock test, and has small anti-sticking attenuation; in the process of hemostasis of the electrotome, the anti-sticking film layer prepared by the preparation method of the anti-sticking film layer on the surface of the electrotome ensures that the electrotome can not be adhered with a mucosa, avoids damaging the mucosa and ensures the hemostasis effect.
Drawings
Fig. 1 is a schematic structural view of a non-mucous membrane-sticking hemostatic electrotome in the gastrointestinal tract of the present invention.
Fig. 2 is a schematic structural view of an anti-adhesive film layer on the surface of an electrotome in accordance with the present invention.
FIG. 3 is a flow chart of the steps of the method of the present invention for preparing the release adhesive film layer on the electrotome surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the gastrointestinal tract internal hemostasis electrotome without sticking mucosa comprises a control end 1 and an intestinal work end 2, wherein the control end 1 is connected with the intestinal work end 2; the control end 1 is provided with a power-on interface 12; the enteral working end 2 comprises an enteral working hose 21 and a telescopic electrifying core 22, and the electrifying core 22 is installed in the enteral working hose 21; the electrifying core 22 is electrically connected with the electrifying interface 12; the tail end of the electrifying core 22 is provided with a smooth hemostatic head 220, the surface of the hemostatic head 220 is provided with an anti-sticking film layer, the anti-sticking film layer comprises a bottom layer 31, a conductive layer 32 and an anti-sticking layer 33 (as shown in fig. 2) which are sequentially arranged on the surface of the hemostatic head 220, the surface of the hemostatic head 220 is firstly provided with the bottom layer 31, the surface of the bottom layer 31 is provided with the conductive layer 32 of a nano-scale columnar matrix, and finally the top end surface of a nano-column of the conductive layer 32 is provided with the anti-sticking layer 33.
Specifically, the priming layer 31 is made of an Ag material layer, and the thickness is 3-8 μm; an Ag material transition layer is arranged between the surface of the hemostatic head 220 and the conducting layer 32, and high-temperature heat treatment is carried out, so that heat diffusion transition layers can be formed between the hemostatic head 220 and the Ag material layer and between the Ag material layer and the conducting layer 32, and the bonding strength and the thermal shock resistance are improved; the Ag material layer can improve the bonding strength with the surface of the hemostatic head 220 and improve the thermal shock resistance and the electrical conductivity of the whole anti-sticking film layer.
Specifically, the conducting layer 32 is a mixed layer of SiO2 and nano Ag, and the thickness is 5-20 μm. A layer of SiO2 and nano Ag mixed layer with a nano-scale columnar matrix is prepared on the surface of the hemostatic head 220 by a sol-gel method, a large number of air molecules are locked between nano columns of the mixed layer, so that most of the contact surface between small intestine tissues and the electrotome is air, namely a layer of air cushion is generated between the small intestine tissues and the electrotome, and the anti-sticking purpose is achieved; the SiO2 and nano Ag mixed layer can obviously reduce the resistivity of the whole anti-sticking film layer and reduce the volume expansion caused by the self heating of the whole anti-sticking film layer when electrified, thereby leading the thermal expansion coefficient of the whole anti-sticking film layer and the hemostatic head 220 to be more matched.
Further, the mixed layer of SiO2 and nano Ag specifically comprises the following components: 12-16% of tetraethyl orthosilicate (TEOS); water is less than or equal to 1 percent; HCL (hydrochloric acid) is less than or equal to 1 percent; NH4OH is less than or equal to 1 percent; 1-5% of nano silver paste; the balance of absolute ethyl alcohol.
By adding the nano silver paste with the granularity of 20-30nm into tetraethyl orthosilicate (TEOS) which is a precursor, the SiO2 and nano Ag mixed layer has good electrical conductivity and thermal conductivity, so that the requirement of electrotome high-frequency discharge is met, the temperature difference between the electrotome substrate and the SiO2 and nano Ag mixed layer is reduced, and the thermal shock resistance and the high temperature resistance are improved.
Specifically, the anti-sticking layer 33 is made of an Ag material layer or an Au material layer, and has a thickness of 0.5 to 2 μm, because the anti-sticking layer 33 is too thin, the anti-sticking effect cannot be achieved, and if the anti-sticking layer 33 is too thick, the nano-columns of the conductive layer 32 are subjected to peak clipping and valley leveling and lose the micro-nano structure. The Au and the Ag are inert metals, the affinity with the protein is poorer than that of SiO2, a thin Ag material layer or an Au material layer is electroplated on the nanometer rough surface of the SiO2 and nanometer Ag mixed layer, and a nanometer rough Au or Ag film is finally formed, so that the anti-sticking purpose is achieved, and the Ag material layer or the Au material layer can prevent the blood stopping head 220 from being stuck with a mucous membrane while stopping bleeding to cause damage to the mucous membrane.
The preparation method of the anti-sticking film layer comprises the following steps:
a1: preparing a bottom layer 31;
a2: preparing a conductive layer 32 of a nano-scale columnar matrix on the surface of the priming layer 31;
a3: and arranging an anti-sticking layer 33 on the top end surface of the nano-pillar of the conducting layer 32 to prepare the anti-sticking film layer.
Specifically, the conductive layer 32 is a mixed layer of SiO2 and nano Ag in a nano-scale columnar matrix, and the mixed layer of SiO2 and nano Ag is prepared by a sol-gel method.
Further, the preparation method of the SiO2 and nano Ag mixed layer comprises the following steps:
a 1: slowly and dropwise adding tetraethyl orthosilicate (TEOS) into water, hydrochloric acid, NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate;
a 2: adding nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution;
a 3: and fully stirring the mixed solution, and fully dispersing by ultrasonic waves to obtain the wet mixed gel of SiO2 and nano Ag.
Wherein the particle size of the nano silver paste is 20-30 nm.
Wherein, in the step a2, the volume ratio of the nano Ag is 5-20%.
A method for arranging the anti-sticking film layer on the surface of an electrotome specifically comprises the following steps:
b1: covering the whole surface of the hemostatic head 220 with the bottom layer 31;
b2: covering the whole surface of the bottom layer 31 with the conducting layer 32 of the nano-scale columnar matrix;
b3: the priming layer 31 and the conducting layer 32 on the surface of the hemostatic head 220 are baked for 2-4 hours at a high temperature of 200 ℃ and 500 ℃. The general baking process of the SiO2 film is at 200 ℃ for 0.5-1 hour at 120-.
B4: an anti-sticking layer 33 is coated on the nanopillar top end face of the conductive layer 32.
The technical solution is now illustrated by the following examples:
example 1
Primer layer 31: and the thickness of the Ag material layer is 3 mu m.
Conductive layer 32: a mixed layer of SiO2 and nano Ag with the thickness of 20 mu m; wherein, the components of the SiO2 and nano Ag mixed layer are as follows: tetraethyl orthosilicate (TEOS) 12%; 1% of water; 1% of HCL; NH4OH 1%; 1% of nano silver paste; the balance of absolute ethyl alcohol.
The anti-sticking layer 33: and the thickness of the Ag material layer is 0.5 mu m.
The preparation of the SiO2 and nano Ag mixed layer: slowly and dropwise adding 12% tetraethyl orthosilicate (TEOS) into 1% of water, 1% of hydrochloric acid, 1% of NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate; adding 1% of nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution; and fully stirring the mixed solution, and performing ultrasonic dispersion to obtain the wet mixed gel of SiO2 and nano Ag. Wherein the particle size of the nano silver paste is 20 nm; in the step S2, the volume ratio of the nano Ag is 5 mu m.
The anti-sticking film layer is arranged on the surface of the electrotome: plating an Ag material layer on the surface of the whole hemostatic head 220, wherein the thickness is 3 mu m; coating the SiO2 and nano Ag mixed layer of the nanoscale columnar matrix on the surface of the whole Ag material layer, wherein the thickness is 20 mu m; then baking for 4 hours at the high temperature of 200 ℃; and electroplating an Ag material layer on the top end face of the nano-column of the SiO2 and nano-Ag mixed layer, wherein the thickness of the Ag material layer is 0.5 mu m.
Example 2
Primer layer 31: and the thickness of the Ag material layer is 8 mu m.
Conductive layer 32: a mixed layer of SiO2 and nano Ag with the thickness of 5 mu m; wherein, the components of the SiO2 and nano Ag mixed layer are as follows: tetraethyl orthosilicate (TEOS) 16%; 0.5 percent of water; HCL 0.5%; 0.5% of NH4OH 0.5; 5% of nano silver paste; the balance of absolute ethyl alcohol.
The anti-sticking layer 33: and the thickness of the Au material layer is 1 mu m.
The preparation of the SiO2 and nano Ag mixed layer: slowly and dropwise adding 16% tetraethyl orthosilicate (TEOS) into 0.5% of water, 0.5% of hydrochloric acid, 0.5% of NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate; adding 5% of nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution; and fully stirring the mixed solution, and performing ultrasonic dispersion to obtain the wet mixed gel of SiO2 and nano Ag. Wherein the particle size of the nano silver paste is 30 nm; in the step S2, the volume ratio of the nano Ag is 20 mu m.
The anti-sticking film layer is arranged on the surface of the electrotome: plating an Ag material layer on the surface of the whole hemostatic head 220, wherein the thickness is 8 mu m; coating the SiO2 and nano Ag mixed layer of the nanoscale columnar matrix on the surface of the whole Ag material layer, wherein the thickness is 5 mu m; then baking for 2 hours at the high temperature of 500 ℃; and electroplating an Ag material layer on the top end face of the nano-column of the SiO2 and nano-Ag mixed layer, wherein the thickness is 1 mu m.
Example 3
Primer layer 31: and the thickness of the Ag material layer is 5 mu m.
Conductive layer 32: a mixed layer of SiO2 and nano Ag with the thickness of 15 mu m; wherein, the components of the SiO2 and nano Ag mixed layer are as follows: tetraethyl orthosilicate (TEOS) 16%; 0.5 percent of water; HCL 0.5%; 0.5% of NH4OH 0.5; 5% of nano silver paste; the balance of absolute ethyl alcohol.
The anti-sticking layer 33: and the thickness of the Au material layer is 0.8 mu m.
The preparation of the SiO2 and nano Ag mixed layer: slowly and dropwise adding 14% tetraethyl orthosilicate (TEOS) into 0.8% of water, 0.8% of hydrochloric acid, 0.8% of NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate; adding 3% of nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution; and fully stirring the mixed solution, and performing ultrasonic dispersion to obtain the wet mixed gel of SiO2 and nano Ag. Wherein the particle size of the nano silver paste is 25 nm; in the step S2, the volume ratio of the nano Ag is 15 mu m.
The anti-sticking film layer is arranged on the surface of the electrotome: plating an Ag material layer on the surface of the whole hemostatic head 220, wherein the thickness is 5 mu m; coating the SiO2 and nano Ag mixed layer of the nanoscale columnar matrix on the surface of the whole Ag material layer, wherein the thickness is 15 mu m; then baking for 3 hours at the high temperature of 350 ℃; and electroplating an Ag material layer on the top end face of the nano-column of the SiO2 and nano-Ag mixed layer, wherein the thickness of the Ag material layer is 0.8 mu m.
After the resistivity test, the oxidation resistance test, the thermal shock test and the anti-adhesion decay test are respectively carried out on the electrotome provided with the anti-adhesion film layer in the embodiment 1-3, it can be seen that the anti-adhesion film layer has low resistivity; the anti-sticking film layer can resist high temperature of 800 ℃, does not fall off and resists oxidation; after 30-800 ℃ thermal shock test, 50-100 thermal shock tests are achieved, and the anti-sticking film layer does not fall off; the release decay of the release properties of the release adhesive film layer is small.
In the technical scheme, a bottoming layer 31, a conductive film layer 32 and an anti-sticking layer 33 are sequentially arranged on the surface of an electrotome substrate, wherein the bottoming layer 31 is an Ag layer, the conductive film layer 32 is a mixed layer of SiO2 and Ag, and the anti-sticking layer 33 is an Au or Ag film layer; the bottom layer 31 is arranged for improving the bonding strength with the electrotome substrate and improving the thermal shock resistance and the electrical conductivity of the whole anti-sticking film layer; the conductive film layer 32 can obviously reduce the resistivity of the whole anti-sticking film layer and reduce the volume expansion caused by the self heating of the whole anti-sticking film layer during electrification, so that the thermal expansion coefficient of the whole anti-sticking film layer is more matched with that of the electrotome substrate; the anti-sticking layer 33 is arranged to prevent the electric knife from sticking to the mucosa to cause injury of the mucosa while stopping bleeding; preparing a SiO2 and Ag mixed layer with a nano-scale columnar matrix on the electrotome, and locking a large amount of air molecules between nano-columns of the mixed layer to ensure that most of the contact surface between small intestine tissues and the electrotome is air, namely generating an air cushion between the small intestine tissues and the electrotome, thereby achieving the purpose of adhesion prevention; through set up bottom layer 31, electrically conductive rete 32 and antiseized layer 33 on electrotome base member surface, not only realized the electrically conductive hemostatic purpose of electrotome, still guaranteed the electrotome can not avoid the injury mucosa with the mucosa adhesion, guarantee hemostatic effect.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. The preparation method of the anti-sticking film layer on the surface of the electrotome is characterized in that the prepared anti-sticking film layer is applied to a high-frequency electrotome and specifically comprises the following steps:
a1: preparing a bottoming layer;
a2: preparing a conductive layer of a nano-scale columnar matrix on the surface of the priming layer;
a3: arranging an anti-sticking layer on the top end surface of the nano column of the conducting layer to prepare an anti-sticking film layer;
the conductive layer is made of SiO with a nano-scale columnar matrix2And a nano Ag mixed layer; the SiO2The raw materials of the mixed layer with the nano Ag comprise the following components: 12-16% of tetraethyl orthosilicate; water is less than or equal to 1 percent; HCL is less than or equal to 1 percent; NH4OH is less than or equal to 1 percent; 1-5% of nano silver paste; the balance of absolute ethyl alcohol.
2. The method for preparing the surface anti-sticking film layer of the electrotome according to claim 1, wherein the primer layer is made of an Ag material layer.
3. The method for preparing the anti-sticking film layer on the surface of the electrotome according to claim 1, wherein the anti-sticking layer is made of an Ag material layer or an Au material layer.
4. The method for preparing the surface anti-sticking film layer of the electrotome according to claim 1, wherein the SiO is2The mixed layer with the nano Ag is prepared by a sol-gel method.
5. The method for preparing the electrotome surface anti-sticking film layer according to claim 4, wherein the method for preparing the SiO2 and nano Ag mixed layer comprises the following steps:
a 1: slowly and dropwise adding tetraethyl orthosilicate into water, hydrochloric acid, NH4OH and absolute ethyl alcohol to form a precursor tetraethyl silicate;
a 2: adding nano silver paste into a precursor tetraethyl silicate to obtain a mixed solution;
a 3: and fully stirring the mixed solution, and performing ultrasonic dispersion to obtain the wet mixed gel of SiO2 and nano Ag.
6. The method for preparing the electrotome surface anti-sticking film layer according to claim 5, wherein the particle size of the nano silver paste is 20-30 nm.
7. The method for preparing the anti-sticking film layer on the electrotome surface according to claim 5, wherein the volume ratio of the nano silver in the nano silver paste is 5-20%.
8. The method for preparing the anti-sticking film layer on the surface of the electrotome according to claim 1, wherein a primer layer is firstly electroplated on the surface of the hemostatic tip, then a conductive layer of a nano-scale columnar matrix is prepared on the surface of the primer layer by a sol-gel method, and finally an anti-sticking layer is electroplated on the top end surface of the nano-column of the conductive layer.
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