KR101105628B1 - Device for taking graphene from graphite - Google Patents

Abstract

Disclosed is a graphite monolayer fabrication apparatus for transferring a graphite monolayer from graphite adhering to an adhesive side of a tape to an adhesion side of a target substrate. The graphite monolayer fabrication apparatus is arranged to be spaced apart from the substrate member for fixing the target substrate, the substrate member corresponding to the length of the tape, and to lift the tape so that the adhesive surface is separated from the attachment surface from the edge of the tape interviewed with the substrate. And a rising member that lifts the other end opposite to one end of the tape interviewed with the substrate at a low speed so that a graphite monolayer is formed on the attachment surface. Thus, it is possible to increase the yield of graphite monolayer obtained from natural graphite.

Graphite Single Layer, Substrate, Lift Member

Description

Graphite Single Layer Fabrication Equipment {DEVICE FOR TAKING GRAPHENE FROM GRAPHITE}

The present invention relates to a graphite monolayer manufacturing apparatus for obtaining a graphite monolayer from natural graphite, and more particularly, to a graphite monolayer manufacturing apparatus capable of increasing the yield of graphite monolayer from natural graphite.

In general, graphite is a structure in which a large number of plate-shaped two-dimensional graphite monolayers in which carbon atoms are connected in a hexagonal shape are stacked. As a result of examining the characteristics of the graphite monolayer having the above-described structure, it was found that when electrons move in the graphite monolayer, the electrons flow as if the mass of the electrons is zero.

Due to the above characteristics, graphite monolayer has become one of the hottest topics of interest in the field of physics, due to the fact that there is no effective mass of electrons in the graphite monolayer, which acts as relativistic particles moving at 1,000 kilometers per second. Based on this, not only the study of the unique quantum hole effect of the graphite monolayer but also the particle physics experiment that could not be performed in the field of particle physics can be indirectly implemented through the graphite monolayer.

In order to use the graphite monolayer for academic purposes, it is currently produced by various methods, for example epitaxy that sublimates Si on the surface of SiC so that the remaining carbon atoms form a graphite monolayer. Epitaxial growth and chemical exfoliation of graphite compounds.

However, in the above-described methods, only a few hundred nanometers of graphite fragments can be obtained to date, it is hard to obtain a graphite monolayer, and many chemicals inserted between graphite layers are not completely removed. There is a problem that can cause defects.

Therefore, in order to obtain a pure graphite monolayer, the conventional method of obtaining the graphite monolayer in the first place, that is, the most widely used method of peeling only one layer of graphite monolayer from the graphite fragment using Scotch tape. to be. At this time, in order to obtain a graphite monolayer with a larger area, it is very important to attach a scotch tape with graphite to the substrate to which the graphite monolayer is to be transferred, and again to remove the graphite monolayer very slowly from the substrate.

However, since the entire process of making the graphite monolayer using Scotch tape is done by hand, it is difficult to separate the Scotch tape from the substrate at low speed, and sometimes hand shaking occurs, which is applied at a constant speed by applying a uniform force. It is virtually difficult to produce, and thus, the yield of obtaining a graphite monolayer from graphite is poor.

The present invention provides a graphite monolayer fabrication apparatus capable of increasing the yield of the graphite monolayer remaining on the substrate from graphite on the tape by attaching the graphite attached to the tape to the substrate and separating it at the lowest speed possible.

According to one exemplary embodiment of the present invention, a graphite monolayer fabrication apparatus is disclosed for transferring a graphite monolayer from graphite adhered to an adhesive surface of a tape to an adhesion surface of a target substrate. The graphite monolayer fabrication apparatus is arranged to be spaced apart from the substrate member for fixing the target substrate, the substrate member corresponding to the length of the tape, and to lift the tape so that the adhesive surface is separated from the attachment surface from the edge of the tape interviewed with the substrate. And a rising member that lifts the other end opposite to one end of the tape interviewed with the substrate at a low speed so that a graphite monolayer is formed on the attachment surface.

The carbon atoms constituting the graphite monolayer are covalently bonded to each other to form polycyclic aromatic molecules, and have strong bonding strength, whereas one layer is half between graphite monolayers having a thickness of approximately 0.3 nm of one carbon atom. Coupled with van der Waals forces, the transition of the graphite monolayer can occur relatively easily when in contact with the target substrate.

In this case, in order to form the graphite monolayer in a larger area, the graphite-coated scotch tape needs to be attached to the substrate, and then squeezed out very slowly with a uniform force from the substrate, and the graphite monolayer manufacturing apparatus of the present invention can do this. In this way, the yield of the graphite monolayer remaining on the substrate can be increased.

The graphite monolayer fabrication apparatus of the present invention is easy to separate the graphite at a low speed in the state of attaching the graphite to the substrate, so that the yield of obtaining the graphite monolayer from the graphite can be high when compared to manual work that may cause hand shaking or difficult to maintain a continuous low speed. Can increase.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. In describing the present invention, a detailed description of well-known functions or constructions may be omitted for clarity of the present invention.

Example 1

1 is a perspective view of a graphite monolayer manufacturing apparatus according to a first embodiment of the present invention, Figure 2 is a side cross-sectional view of Figure 1, Figure 3 is a perspective view of the tape shown in FIG.

1 to 3, the graphite monolayer manufacturing apparatus 100 for obtaining a graphite monolayer from graphite includes a substrate member 120, a lifting member 130, and a body portion 110.

First, an adhesive is applied to one surface of the tape 101 to form an adhesive surface 102 to which graphite may be attached. Thus, the tape 101 applied to the graphite monolayer fabrication device 100 of the present embodiment provides a small amount of graphite on the adhesive surface 102.

At this time, only a small amount of the graphite powder on the tape 101 so as not to fall off from the graphite provided on the tape 101 should be provided on the tape 101. For this purpose, the graphite fragment 103 is buried in the tape 101. When another tape is stuck again to the part where the graphite fragment 103 was affixed, the action is repeated and the tape 101 with which the thin graphite fragment 103 is stuck can be provided. At this time, since one end surface of one end of the tape 101 having the graphite fragment 103 is attached to the upper surface of the substrate 121, as shown in FIG. 3, one end of one end of the tape 101 is shown. It is preferable to attach some graphite fragments 103 to the cross section, and in the graphite fragments 103 in this state, at least several to several tens of layers of graphite monolayers are bonded by mutual van der Waals forces.

 The substrate member 120 and the lifting member 130 are coupled to the body portion 110 by being spaced apart to correspond to the length of the tape 101 so that both ends of the tape 101 may be disposed, respectively. 120 includes a substrate pedestal 122 and a substrate holder 124.

First, the substrate 121 disposed on the substrate pedestal 122 may be made of various materials such as synthetic resin, metal, ceramic, and the like. In this embodiment, the substrate 121 is manufactured using silica (silicon dioxide). The adhesion surface 125 which the adhesive surface 102 of the tape 101 with which the graphite fragment 103 adheres is in close contact is formed.

In addition, the substrate pedestal 122 is coupled to the body portion 110 so as to slide in an upper portion of the body portion 110. Specifically, the upper surface of the body portion 110 is formed with a slide groove 113 of the groove shape along the longitudinal direction, the bottom surface of the substrate support 122, a projection shape protruding corresponding to the slide groove 113 The slide projection 123 is formed. Thus, the substrate pedestal 122 is disposed on the upper surface of the body portion 110, can be moved sliding on the upper portion of the body portion 110, the substrate 121 is coupled to the upper portion of the substrate pedestal 122 described above the substrate According to the slide movement of the pedestal 122, the upper portion of the body portion 110 can be slid with the substrate pedestal 122, thereby adjusting the separation distance between the substrate 121 and the rising member 130.

In addition, the substrate holder 124 fixes the substrate 121 disposed on the upper surface of the substrate pedestal 122 to the substrate pedestal 122, and at the same time, the tape (which is interviewed with the substrate 121 by the lifting member 130 to be described later) In the case where the other end of the tape 101 facing one end of the 101 is lifted, the adhesive face 102 of the tape 101 starts from the edge of the tape 101 starting to be separated from the attachment face 125. The edge of the tape 101 of the opposing part can be pressed. Specifically, the substrate holder 124 is disposed on the upper portion of the tape 101 so that the bottom thereof corresponds to the end of the tape 101 disposed on the upper surface of the substrate 121, and moves downward, so that the tape 101 is It is in close contact with the substrate 121. In particular, the substrate holder 124 may maintain a state in which the tape 101 is pressed by the screw 126 coupled to the substrate support 122 by penetrating the substrate holder 124 from above.

On the other hand, the lifting member 130 is provided to lift the tape 101 at the end at a low speed, so that the graphite single layer is formed on the attachment surface 125 of the substrate 121, wherein the rotating shaft 131 is attached to the attachment surface ( It is preferable that the initial setting angle of the tape 101 and the substrate 121, which is disposed above the 125 and is lifted by the lifting member 130, is greater than 0 and less than 10 degrees. This is because the other end of the tape 101 is not wound by the rotation axis when the angle between the tape 101 and the substrate 121 is 0 degrees or when the rotation shaft 131 is disposed below the attachment surface 125. In this case, the tape 101 may not be gradually separated from the substrate 121, and if the tape 101 is more than that, the rate at which the tape 101 is separated from the substrate 121 is increased, and the graphite single remaining on the surface of the substrate 121 is increased. This is because the acquisition rate of the layer can be reduced.

The lifting member 130 is a rotation shaft 131 rotatably provided to the body portion 110 in a direction perpendicular to the sliding movement direction of the substrate support 122, and a driving member capable of rotating the rotation shaft 131 at a low speed. It includes.

In this embodiment, the driving member includes a large rotary wheel 132 integrally formed at the end of the rotary shaft 131. At this time, the user can manually rotate the large rotary wheel 132, because the diameter of the large rotary wheel 132 is much larger than the diameter of the rotary shaft 131, to adjust the rotation speed of the rotary shaft 131 It is easy. Accordingly, by rotating the rotary shaft 131 using the large rotary wheel 132, it is easy to control the speed at which one end of the tape 101 is wound on the rotary shaft 131, in particular, to maintain at a low speed, the substrate The other end of the tape 101 attached to the upper surface of 121 may be spaced apart from the substrate 121 at a constant force and a constant speed. Therefore, compared with the process of separating the graphite monolayer by hand, the acquisition rate of the graphite monolayer having an area of approximately several to several hundred μm ² or more is increased by more than two times.

Example 2

Figure 4 is a perspective view of a graphite monolayer manufacturing apparatus according to a second embodiment of the present invention.

The components of the graphite monolayer fabrication apparatus according to the present embodiment are substantially the same as those of the graphite monolayer fabrication apparatus described with reference to FIGS. 1 and 2, and thus, in this embodiment, the rotary shaft may be automatically rotated unlike the previous embodiment. A description will be given with respect to the driving device, and other components of the graphite monolayer fabrication apparatus may be referred to the description and drawings of the graphite monolayer fabrication apparatus of the previous embodiment, and repeated descriptions thereof will be omitted.

Referring to FIG. 4, the graphite monolayer manufacturing apparatus 200 includes a substrate member 220, a rising member 230, and a body portion 210.

In this embodiment, the lifting member 230 includes a rotation shaft 231 and a driving member 232, and the driving member 232 of the present embodiment measures the rotational speed of the output shaft of the driving motor 232 and the driving motor 232. Further comprising a drive motor gearbox 234 for deceleration, it is possible to automatically rotate the rotating shaft 231.

In this embodiment, although the large rotating wheel 132 corresponding to the driving member is attached to the rotating shaft 131 in the previous embodiment, the driven gear 235 having a tooth formed along the outer circumference instead of the large rotating wheel in this embodiment. Is attached, the driven gear 235 again rotates the rotating shaft 131 at a low speed by the worm gear 236 coupled to the output shaft of the drive motor 232, it can rotate at a uniform force and speed.

That is, by using a drive motor gear box 234 including a driven gear 235 coupled to the rotary shaft 231 and a worm gear 236 coupled to the drive motor 232, wound around the rotary shaft 231. It is easy to adjust the speed of winding one end of the tape 201, and thus, tape attached to the upper surface of the substrate 221 as compared to hand shaking or difficult to maintain the uniform force and speed to separate the tape into the substrate. It is possible to separate the other end of the 201 from the substrate 221 at a constant speed and at a constant speed.

Example 3

5 is a perspective view of a graphite monolayer manufacturing apparatus according to a third embodiment of the present invention.

The components of the graphite monolayer fabrication apparatus according to the present embodiment are substantially the same as those of the graphite monolayer fabrication apparatus described with reference to FIGS. 1 and 2, and thus, the present embodiment will be described based on a different lifting member from the previous embodiment. Other components of the graphite monolayer fabrication apparatus may be referred to the description and drawings of the graphite monolayer fabrication apparatus of the previous embodiment, and repeated descriptions thereof will be omitted.

Referring to FIG. 5, the graphite monolayer manufacturing apparatus 300 according to the present exemplary embodiment includes a substrate member 320, a lifting member 330, and a body portion 310.

In this embodiment, the lifting member 330 includes a moving holder 331 movable vertically with respect to the substrate 321 and a driving member for raising the moving holder 331 at a low speed.

The other end of the movement holder 331 opposite to one end of the tape 301 attached to the top of the substrate 321 is attached.

The driving member is spaced apart from the substrate 321 by a predetermined distance, and is mounted on the upper portion of the body portion 310, and the vertical holder 332 is vertically formed with a groove 333 vertically coupled to the movement holder 331 so as to slide upward and downward. It includes.

Accordingly, the upper portion of the tape 302 facing the one end of the tape 301 attached to the substrate 321 may be slowly lifted by lifting the movable holder 331 along the groove 333 at a low speed. Thus, by gradually separating from the edge of the tape 302 attached to the substrate 321, it is possible to increase the acquisition rate of the graphite monolayer remaining on the surface of the substrate 321.

On the other hand, the drive body to reduce the rotational speed of the output shaft of the drive motor and the drive motor, which can automatically raise the moving holder 331 in addition to the vertical body 332, to implement the lifting and lowering of the moving holder 331 Drive motor gearbox may be further provided.

For example, a pulley is installed on the upper and lower parts of the vertical body, and a moving holder is attached to a circulation belt for circulating the pulley, and the circulation belt is circulated using a driving motor to automatically raise or lower the moving holder at an appropriate speed and force. By lowering | hanging, the edge part of the tape adhering to a board | substrate can be raised gradually.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

1 is a perspective view of a graphite monolayer manufacturing apparatus according to a first embodiment of the present invention.

2 is a side cross-sectional view of FIG. 1.

3 is a perspective view of the tape shown in FIG.

Figure 4 is a perspective view of a graphite monolayer manufacturing apparatus according to a second embodiment of the present invention.

5 is a perspective view of a graphite monolayer manufacturing apparatus according to a third embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: graphite single layer production apparatus 110: body part

120: substrate member 121: substrate

122: substrate holder 124: substrate holder

130: lifting member 131: rotating shaft

132 ： Large rotary wheel 232 ： Drive member

Claims (10)

In the graphite monolayer fabrication apparatus for transferring the graphite monolayer (grapheme) from the graphite attached to the adhesive side of the tape to the adhesion side of the target substrate, A substrate member for fixing the substrate; And It is spaced apart from the substrate member corresponding to the length of the tape, The tape interviewed with the substrate such that the transition of the graphite monolayer from the graphite adhering to the adhesive surface occurs in the process of separating the adhesive surface from the edge of the tape interviewed with the substrate. A lifting member for lifting the other end opposite to one end of the vehicle at a low speed; Graphite monolayer manufacturing apparatus comprising a. The method of claim 1, And the substrate member comprises a substrate holder for pressing an edge of the tape opposite the edge of the tape from which the adhesive surface begins to be spaced apart from the attachment surface. The method of claim 1, And the elevating member includes a rotating shaft which is coupled with an end of the tape facing the substrate, and a driving member for rotating the rotating shaft at a low speed. The method of claim 3, The drive member is a graphite single layer manufacturing apparatus, characterized in that it comprises a large rotary wheel integrally formed at the end of the rotating shaft. The method of claim 3, The drive member is a graphite monolayer manufacturing apparatus comprising a drive motor gearbox for reducing the rotational speed of the drive motor and the output shaft of the drive motor. The method of claim 3, The rotating shaft is a graphite monolayer manufacturing apparatus, characterized in that disposed above the attachment surface. The method of claim 1, And the elevating member includes a movable holder movable vertically with respect to the substrate and a driving member for raising the movable holder at a low speed. The method of claim 7, wherein The drive member is a graphite monolayer manufacturing apparatus comprising a drive motor gearbox for reducing the rotational speed of the drive motor and the output shaft of the drive motor. The method of claim 1, And an initial setting angle of the tape and the substrate lifted by the elevating member is greater than 0 and less than 10 degrees. The method of claim 1, A body portion to which the substrate member and the lifting member are coupled; The substrate is a graphite monolayer manufacturing apparatus, characterized in that coupled to the sliding movement from the body portion.

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