CN208043855U - A kind of signal supervisory instrument for scanning tunneling microscope - Google Patents
A kind of signal supervisory instrument for scanning tunneling microscope Download PDFInfo
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- CN208043855U CN208043855U CN201820326753.5U CN201820326753U CN208043855U CN 208043855 U CN208043855 U CN 208043855U CN 201820326753 U CN201820326753 U CN 201820326753U CN 208043855 U CN208043855 U CN 208043855U
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Abstract
A kind of signal supervisory instrument for scanning tunneling microscope belongs to scanning tunneling microscope technical field；The utility model is insufficient to electromagnetic signal interference shielding in order to solve existing product, the problems such as replacing and shearing needle point is excessively troublesome, and lack side optical observation and positioning device；The utility model includes the heads STM and observation device, and receiving hole is provided on the heads STM, and receiving hole is embedded to be inserted with probe carriage, and probe is equipped on the probe carriage in the heads STM, is metal screen case outside the heads STM；The utility model greatly facilitates the operability of scanning tunneling microscope, improves the service efficiency of instrument.
Description
Technical field
A kind of signal supervisory instrument for scanning tunneling microscope belongs to scanning tunneling microscope technical field.
Background technology
Scanning tunneling microscope（STM）It is according to the tunnel effect principle in quantum mechanics, by detecting sample surfaces original
The tunnel current of electronics differentiates the novel microscope equipment of sample surface morphology in son.With a superfine, only atom dimension
Metal needle point as probe, using the surface of it and sample as two electrodes, then apply between probe and sample
Bias, when sample surfaces and needle point very close to when, the tunnel current generated between the two is flowed out from probe, when probe passes through sample
The different position in product surface, the magnitude of current for flowing through probe is just different, these variations are recorded, and then passes through complexity
Software algorithm can finally obtain the micro asperities of sample surfaces.
The resolution ratio of STM is very high, but can only be used for surveying conductive sample, and requires the surface of sample very flat
It is whole.Requirements of the STM to environment simultaneously is also very harsh, is typically carried out in the environment of vacuum, each due to existing in air
The interference of kind electronic signal, influences whether interatomic tunnel current.Therefore to use STM that can also obtain well in air
Image, very crucial to the shielding of electromagnetic signal, in order to can also test in air, existing STM generally employs one
A very big metallic shield, entire host is all covered；The probe that STM is used is typically superfine platinoiridita silk needle point,
Needle point size can even reach the size of an atom, and in order to obtain good image, this just needs frequent replacement or cuts
Needle point is cut, existing STM is to take off entire probe to be replaced and sheared needle point, and operation is cumbersome.In addition work as STM
When work, sample surfaces and needle point are very close（Several nanometers）, usually this just need an optical observation and positioning fill
It sets, state is approached to observe probe and sample in real time.
Utility model content
To solve the above-mentioned problems, the utility model discloses a kind of signal detection dresses for scanning tunneling microscope
It sets, is not only simple in structure, strong antijamming capability, probe are replaced and shearing is convenient.
What the purpose of this utility model was realized in：
A kind of signal supervisory instrument for scanning tunneling microscope, including the heads STM and observation device, on the heads STM
It is provided with receiving hole, receiving hole is embedded to be inserted with probe carriage, and probe, the heads STM are equipped on the probe carriage in the heads STM
Outside is metal screen case.
Further, described probe carriage one end is equipped with insulation sleeve, and insulation sleeve is embedded to be inserted with metal sleeve, and probe one end is embedding
It is inserted in metal sleeve, the probe other end is located at outside metal sleeve.
Further, it is fixedly connected by glue between metal sleeve and insulation sleeve.
Further, signal processing circuit and spring contact are equipped in the heads STM, probe carriage is mounted on the heads STM
When interior, spring contact is electrically connected with probe and signal processing circuit foundation respectively.
Further, the spring contact is mounted on insulation board, when probe carriage is mounted in the heads STM, is touched with spring
There is conductive contact blade, conductive contact blade to be electrically connected with probe foundation by conducting wire for point position corresponding position.
Further, in the circuit board, wiring board is equipped with interface connector for signal processing circuit installation.
Further, the observation device includes CCD observation devices, and one end of CCD observation devices, which is stretched into the heads STM, to be visited
At pin position.
Further, the heads STM is upper with opening is picked and placeed, and the position and receiving hole for picking and placeing opening are oppositely disposed in
The both sides on the heads STM.
Further, rich in metal cover board, the open end for picking and placeing opening is set the note on the heads STM of receiving hole side
There is metallic shield lid.
Further, probe carriage and metal shielding board are fixedly connected by magnet steel with the heads STM, utilize the magnetism of magnet steel
Metal cover board and metal shielding board are secured firmly on the heads STM.
The utility model compared with prior art, has the advantages that the signal based on scanning tunneling microscope is examined
Device is surveyed, it is simple in structure, it is good to shield influence of the electromagnetic signal interference to instrument in air, and replacing and shearing platinum
It is very convenient when iridium wire needle point, can from side in real time from probe and sample approach state, greatly facilitate scanning tunnel
The microscopical operability in road, improves the service efficiency of instrument.
Description of the drawings
Fig. 1 is a kind of vertical section structural representation of signal supervisory instrument for scanning tunneling microscope of the utility model
Figure；
Fig. 2 is a kind of external structure schematic diagram of signal supervisory instrument for scanning tunneling microscope of the utility model；
In figure：1, the heads STM；2, probe carriage；3, metallic shield lid；4, CCD observes device；5, CCD mounting bases；6, absolutely
Edge set；7, metal sleeve；8, platinoiridita silk probe；9, conductive contact blade；10, conducting wire A；11, insulation board；12, spring contact；13, line
Road plate；14, conducting wire B；15, interface connector；16, metal cover board；17, magnet steel A；18, magnet steel B.
Specific implementation mode
Specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of signal supervisory instrument for scanning tunneling microscope of the present embodiment, including the heads STM 1, the heads STM 1
Upper end is provided with receiving hole, and receiving hole is embedded to be inserted with probe carriage 2, and all there are one be oriented to for 2 outside of probe carriage and the receiving hole inner wall
Structure changes to avoid direction and position when being inserted into the probe carriage 2 every time；
Insulation sleeve 6 is installed on the probe carriage 2 in the heads STM 1, is opened among insulation sleeve 6 there are one pore, in pore
It is fixed with the metal sleeve 7 with glue, is opened among the metal sleeve 7 there are one thinner hole, platinoiridita silk probe 8 is mounted on
In metal sleeve 7, and 8 both ends of platinoiridita silk probe extend to outside metal sleeve 7, due to the internal diameter very small of metal sleeve
There is 0.2mm, there are certain bendings for the platinoiridita silk probe 8, can stablize in the thin of the metal sleeve 7 using frictional force
In hole；
Also the conductive contact blade 9 is fixed with glue, one end of conducting wire A is welded on described in the side of the insulation sleeve 6
Above contact 9, the other end is welded on above the metal sleeve 7, and the inside on the heads STM 1 is additionally provided with 11 wiring board of insulation board
13, wiring board 13 is a low current signal amplifier, is additionally provided with the interface connector 15 above, and the insulation board 11 is logical
It crosses screw to be fixed on the inner wall of the heads STM, the upper surface of insulation board 11 is also fixed with spring contact 12, one end of conductive B with glue
It is welded on above the spring contact 12, the other end is welded on above the wiring board 13.Described in being inserted into when the probe carriage 2
When the heads 1 STM, the conductive contact blade 9 above probe carriage 2 will be in contact with the spring contact 12, and amplified signal is passed
It is defeated by STM controllers；
The right side on the heads STM 1 is further fixed on the CCD mounting bases 5, and the upper surface of described CCD mounting bases 5 are fixed
State CCD observation devices 4, CCD observation device 4 is the needle point that the platinoiridita silk probe 8 is targeted by from side, when work,
Device 4 is observed by the CCD, so that it may to observe the approach state of probe and sample in real time, to avoid striker.
There are one opening is picked and placeed before the heads STM 1, it is primarily used to take out and place sample.Pick and place opening
Both sides fix there are four the magnet steel B, the upper surface of corresponding described metallic shield lid 3 is also fixed there are four the magnet steel B,
Firmly the metallic shield lid 3 can be adsorbed on the heads STM 1 using the magnetism of the magnet steel B, when needing to take out
When with placing sample, the metallic shield lid 3 can also be lifted down at any time；The topmost on the heads STM 1 is further fixed on described
Metal cover board 16, when work, the heads STM 1 were integrally fixed above STM sample stages, after covering metallic shield lid 3,
The entire heads STM are exactly a metal enclosed structure, very effective can mask what electromagnetic signal in surrounding air was brought
Interference.
There are the magnet steel A there are two fixing, the bottom of the corresponding insulation sleeve 6 in the interstitial hole on the heads STM 1
Also fixed there are two magnet steel A, can the probe carriage 2 be firmly adsorbed on the heads STM using the magnetism of the magnet steel A
In the receiving hole on 1 top, when needing replacing or shearing the platinoiridita silk probe 8, it is only necessary to take out the probe carriage 2 i.e.
Can, it is very convenient.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will illustrate
As a whole, the technical solutions in the various embodiments may also be suitably combined for book, and forming those skilled in the art can manage
The other embodiment of solution.
Claims (10)
1. a kind of signal supervisory instrument for scanning tunneling microscope, including the heads STM and observation device, it is characterised in that：
Receiving hole is provided on the heads STM, receiving hole is embedded to be inserted with probe carriage, is equipped with probe on the probe carriage in the heads STM, institute
State outside the heads STM is metal screen case.
2. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 1, it is characterised in that：The spy
Punch block one end is equipped with insulation sleeve, and insulation sleeve is embedded to be inserted with metal sleeve, and for the intercalation of probe one end in metal sleeve, probe is another
End is located at outside metal sleeve.
3. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 2, it is characterised in that：Metallic sheath
Pipe is fixedly connected between insulation sleeve by glue.
4. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 1, it is characterised in that：It is described
In the heads STM be equipped with signal processing circuit and spring contact, probe carriage be mounted on the heads STM in when, spring contact respectively with spy
Needle and signal processing circuit establish electrical connection.
5. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 4, it is characterised in that：The bullet
Spring contact is mounted on insulation board, when probe carriage is mounted in the heads STM, has conductive touch with spring contact position corresponding position
Piece, conductive contact blade are electrically connected by conducting wire with probe foundation.
6. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 4, it is characterised in that：At signal
Manage circuit installation in the circuit board, wiring board is equipped with interface connector.
7. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 1, it is characterised in that：The sight
It includes CCD observation devices to survey device, and one end of CCD observation devices is stretched at the internal probe position of the heads STM.
8. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 1, it is characterised in that：It is described
The heads STM it is upper have pick and place opening, pick and place the position of opening and receiving hole be oppositely disposed in the both sides on the heads STM.
9. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 8, it is characterised in that：Institute's rheme
In note on the heads STM of receiving hole side rich in metal cover board, the open end for picking and placeing opening is equipped with metallic shield lid.
10. a kind of signal supervisory instrument for scanning tunneling microscope according to claim 9, it is characterised in that：Probe
Frame and metal shielding board are fixedly connected by magnet steel with the heads STM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820326753.5U CN208043855U (en) | 2018-03-12 | 2018-03-12 | A kind of signal supervisory instrument for scanning tunneling microscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820326753.5U CN208043855U (en) | 2018-03-12 | 2018-03-12 | A kind of signal supervisory instrument for scanning tunneling microscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208043855U true CN208043855U (en) | 2018-11-02 |
Family
ID=63949740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820326753.5U Active CN208043855U (en) | 2018-03-12 | 2018-03-12 | A kind of signal supervisory instrument for scanning tunneling microscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208043855U (en) |
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2018
- 2018-03-12 CN CN201820326753.5U patent/CN208043855U/en active Active
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