- #1
baconbits423
- 18
- 0
I am working on a project involving a scanning tunneling microscope, and to move atoms i need an untra high vacuum chamber. Any info you have on UHV or STM would be immensly appreciated.
Thanks
Thanks
baconbits423 said:I am working on a project involving a scanning tunneling microscope, and to move atoms i need an untra high vacuum chamber. Any info you have on UHV or STM would be immensly appreciated.
baconbits423 said:Any thing, mostly about a uhv, for example does it need to be at a certain temp, what types of pumps are needed, what is necessary to use a scanning tunneling microscope to lift atoms off of a surface.
An ultra high vacuum is a specialized environment with extremely low pressure and minimal amounts of impurities. In the context of an STM, it is necessary to maintain a UHV in order to prevent any contamination or interference with the delicate measurements taken by the microscope.
The purpose of using an UHV with an STM is to provide a clean and stable environment for the sample being studied. This allows for precise measurements and imaging without any interference from external factors such as air molecules or contaminants.
An UHV is achieved by using a combination of vacuum pumps and specialized chambers. First, a rough vacuum is created by using a rotary pump to remove the majority of air molecules. Then, a high vacuum is achieved using turbo molecular pumps that can reach pressures as low as 10^-9 millibar. Finally, an UHV is created using a cryopump or ion pump, which can reach pressures as low as 10^-12 millibar.
No, it is not possible to maintain an UHV indefinitely as there will always be small amounts of gas molecules present. However, with proper maintenance and regular pumping, an UHV can be maintained for extended periods of time.
Using an UHV with an STM provides several benefits, including increased sensitivity and resolution, reduced contamination and interference, and the ability to study delicate samples without damaging them. It also allows for a wider range of experiments to be conducted, such as studying surface chemistry and atomic manipulation.