CN111070137B

CN111070137B - TEM Grid clamping device and using method thereof

Info

Publication number: CN111070137B
Application number: CN202010074412.5A
Authority: CN
Inventors: 陈文哲; 陈由馨; 陈长鑫; 李巍; 彭开萍
Original assignee: Shanghai Jiaotong University; Fuzhou University
Current assignee: Shanghai Jiaotong University; Fuzhou University
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-11-06
Anticipated expiration: 2040-01-22
Also published as: CN111070137A

Abstract

The invention provides a TEM Grid clamping device, which comprises a support and a cover plate positioned above the support, wherein 4 bosses respectively positioned at four corners of the support are arranged on the upper surface of the support, the support is provided with a plurality of uniformly arranged lower through holes, a plurality of lower sharp parts are uniformly arranged on the inner side of each lower through hole along the circumferential direction of the corresponding lower through hole, 4 clamping holes matched with the bosses are arranged at the four corners of the cover plate, a plurality of upper through holes corresponding to the lower through holes one by one are arranged on the cover plate, and a plurality of upper sharp parts corresponding to the lower sharp parts are arranged on the inner side of each upper through hole. The device is simple in structure, reasonable in design and convenient to use, clamps the copper mesh through the clamping effect of the upper sharp part and the lower sharp part, reduces repeated damage of external force to the surface of the copper mesh, and clamps the copper mesh in sequence, so that the sample preparation process is simplified, and the device has innovativeness.

Description

TEM Grid clamping device and using method thereof

Technical Field

The invention relates to a TEM Grid clamping device and a using method thereof.

Background

Transmission Electron Microscopes (TEMs) are widely used in material science and biology and are an important way to determine crystal structures and surface morphologies. For TEM observation, the crucial steps belong to the preparation of samples. In the preparation of various samples, the preparation of liquid or powder samples is usually realized by dripping or depositing. Compared with the preparation of powder samples, in order to characterize the structure and the appearance of a sample dispersed in liquid, the liquid is usually dripped on a copper mesh (Grid), and the sample is observed after being dried. This process appears to be simple, but sample preparation is often limited by several external factors.

Currently, a typical liquid sample preparation process is to clamp a TEM Grid by using a tip of a self-locking forceps, then add a liquid sample drop on the TEM Grid, and finally dry the liquid sample in a drying device. The following problems are often encountered in this process: firstly, as the size of the TEM Grid is very small, when the TEM Grid is clamped by using self-locking tweezers, a region with a very small tip end is required to be used for clamping, the clamping area cannot be well controlled, the surface film of the TEM Grid is damaged in a large area, and an available sample cannot be prepared; secondly, the manual clamping process needs to be matched with other tools, such as pointed tweezers, to perform auxiliary operation, the operation process is quite troublesome and difficult to control accurately, and problems such as bending and damage of the TEM Grid are easily caused; finally, due to the fact that the size of the tip of the self-locking tweezers and the clamping area are too large, when liquid is dripped, the solution is easy to flow away along the clamping gaps of the tweezers. To avoid this, the current method of operation is to drop the liquid on the side away from the tip of the tweezers and the amount of the solution to be dropped is controlled more precisely, which undoubtedly further increases the complexity of the operation.

Disclosure of Invention

The invention improves the problems, namely the technical problem to be solved by the invention is to provide a TEM Grid clamping device and a using method thereof, which are convenient to use, simplify the sample preparation process and can effectively improve the efficiency and success rate of sample preparation.

The specific embodiment of the invention is as follows: the utility model provides a TEM Grid clamping device, includes the support and is located the apron of support top, the support upper surface is equipped with 4 bosss that are located support four corners position respectively, the support is equipped with a plurality of align to Grid's lower through-hole, the through-hole inboard evenly is provided with sharp portion under a plurality of along through-hole circumference down, apron four corners position is equipped with 4 and boss matched with card hole, be provided with the last through-hole of a plurality of and lower through-hole one-to-one on the apron, it is provided with the last sharp portion that a plurality of and sharp portion correspond down to go up the through-hole inboard.

Furthermore, the edge above the upper through hole is provided with a chamfer angle.

Furthermore, each upper sharp part is arranged along the radial direction of the upper through hole, and the section of each upper sharp part is in a fan shape.

Furthermore, each lower sharp part is arranged along the radial direction of the lower through hole, and the section of each lower sharp part is in a fan shape.

Furthermore, a copper mesh is arranged between the upper sharp part and the lower sharp part.

Further, the use method of the TEM Grid clamping device comprises the following steps: (1) placing the copper mesh on a lower sharp part in the lower through hole of the support; (2) aligning the boss on the support to the clamping hole on the cover plate and covering the boss to ensure that the cover plate and the support are clamped and fixed; (3) and at the moment, the upper sharp part and the lower sharp part firmly clamp the copper mesh, a target solution sample is dripped on the copper mesh, and the preparation of the target sample can be completed after drying.

Compared with the prior art, the invention has the following beneficial effects: this device simple structure, reasonable in design, convenient to use through the clamping action of last sharp-pointed part and lower sharp-pointed part, cliies the copper mesh, reduces external force to the destruction repeatedly on copper mesh surface, and the clamping in proper order can, simplify the sample preparation process, can effectively improve the efficiency and the success rate of sample preparation, have the novelty.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a front view of a pedestal according to an embodiment of the present invention;

FIG. 3 is a side view of a partial schematic of a pedestal according to an embodiment of the present invention;

FIG. 4 is a schematic view A of a partial structure of a support;

FIG. 5 is a front view of a cover plate according to an embodiment of the present invention;

FIG. 6 is a side view of a cover plate according to an embodiment of the present invention;

fig. 7 is a schematic view B of a partial structure of a cover plate according to an embodiment of the invention.

In the figure: 1-support, 11-lower through hole, 2-cover plate, 21-upper through hole, 22-clamping hole, 3-boss, 4-lower sharp part, 5-upper sharp part, 6-chamfer angle and 7-copper net.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example (b): as shown in fig. 1-7, a TEM Grid clamping device is provided, apron 2 above including support 1 and being located the support, 1 upper surface of support is equipped with 4 bosss 3 that are located support four corners position respectively, the support is equipped with 10 align to Grid's lower through-hole 11, divide into 2 rows and distributes, and one row of 5 lower through-holes, every lower through-hole 11 inboard evenly is provided with 3 sharp portions 4 down along through-hole circumference down, and the contained angle between adjacent sharp portion 4 down can be 120 degrees, 3 four corners position of apron is equipped with 4 and boss matched with card holes 22, be provided with 3 last through-holes 21 with lower through-hole one-to-one on the apron 2, it is provided with 3 last sharp portions 5 that correspond with sharp portion down to go up the through-hole inboard.

In this embodiment, the upper edge of the upper through hole 21 is provided with a chamfer angle 6, and the chamfer angle of the chamfer angle may be 45 °.

In this embodiment, the boss can be cylindrical, the card hole is circular and the cooperation of card hole and boss joint.

In this embodiment, each upper sharp part 5 is arranged along the radial direction of the upper through hole, the section of each upper sharp part is fan-shaped, the diameters of the upper sharp parts are sequentially reduced, and the fan-shaped sharp end is close to the center of the upper through hole.

In this embodiment, each lower sharp part 4 is arranged along the radial direction of the lower through hole, the diameter of the lower sharp part is reduced in sequence, the section of each lower sharp part is fan-shaped, and the fan-shaped sharp end is close to the center of the lower through hole.

Preferably, the clamping area of the upper sharp part and the lower sharp part is ensured to be as small as possible, and liquid is prevented from flowing out along the upper sharp part or the lower sharp part.

In this embodiment, a copper mesh 7 is disposed between the upper sharp part and the lower sharp part, and preferably, the copper mesh is disposed in the middle of the lower through hole.

In the embodiment, when in use, the copper mesh 7 is firstly placed on the lower sharp part 4 in the lower through hole 11 of the support 1; aligning 4 bosses on the support with corresponding clamping holes 22 on the cover plate and covering the bosses to fix the cover plate and the support in a clamping way; at the moment, the edges of the copper mesh are firmly clamped by the upper sharp part 5 and the lower sharp part 4, a target solution sample is dripped on the copper mesh, and the preparation of the target sample can be completed after drying.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. The utility model provides a TEM Grid clamping device, its characterized in that, includes the support and is located the apron of support top, the support upper surface is equipped with 4 bosss that are located support four corners position respectively, the support is equipped with a plurality of align to Grid's lower through-hole, the through-hole inboard evenly is provided with sharp portion under a plurality of along through-hole circumference down, apron four corners position is equipped with 4 and boss matched with card hole, be provided with the last through-hole of a plurality of and lower through-hole one-to-one on the apron, it is provided with sharp portion on a plurality of and the corresponding sharp portion down to go up the through-hole inboard.

2. A TEM Grid clamping device as claimed in claim 1, wherein the upper edge of the upper through hole is chamfered.

3. A TEM Grid clamping device as claimed in claim 1, wherein each upper sharp is located radially of the upper aperture, and each upper sharp is fan-shaped in cross-section.

4. A TEM Grid clamping device as claimed in claim 1, wherein each lower sharp is arranged radially along the lower through hole, and each lower sharp has a fan-shaped cross-section.

5. A TEM Grid clamping device as claimed in claim 1, characterised in that a copper mesh is provided between the upper and lower sharp portions.

6. A method of using a TEM Grid clamping apparatus as claimed in claim 1, comprising the steps of: (1) placing the copper mesh on a lower sharp part in the lower through hole of the support; (2) aligning the boss on the support to the clamping hole on the cover plate and covering the boss to ensure that the cover plate and the support are clamped and fixed; (3) and at the moment, the upper sharp part and the lower sharp part firmly clamp the copper mesh, a target solution sample is dripped on the copper mesh, and the preparation of the target sample can be completed after drying.