Research the development of the scanning tunneling microscope, which can be used to make images

Research the development of the scanning tunneling...

Key Concepts

Scanning Tunneling Microscope (STM)

This is a type of microscope that utilizes the principle of quantum tunneling to image surfaces at atomic resolution. It works by measuring the tunneling current between a sharp conductive tip and the sample surface, which varies with the distance between the tip and individual atoms, thereby allowing the mapping of atomic-scale surface features.

Quantum Tunneling

A fundamental quantum mechanical phenomenon where particles, such as electrons, penetrate through energy barriers that they classically should not overcome. This principle is essential for the operation of STM, as it enables the detection of electron tunneling between the microscope tip and the surface, forming the basis for high-resolution imaging.

Atomic and Surface Structure Imaging

This concept involves the analysis of the spatial arrangement and electronic properties of atoms on a material's surface. STM has provided unprecedented insights into these structures by directly imaging individual atoms and revealing details about electron density, surface defects, and local chemical properties, which are crucial for understanding material behavior.

Advances in Nanoscience and Materials Characterization

The development of STM has significantly propelled the field of nanoscience by enabling detailed visualization and manipulation of matter at the atomic level. This technological breakthrough has enhanced our understanding of atomic-scale phenomena and contributed to advances in material science, electronics, and the development of new nanostructured materials.

Transcript

00:01 In this video, we will study about electron microscope and what are the uses of electron microscope.

00:10 So let's write it down.

00:15 Electron microscope, right? so the most important thing for electron microscope is, so first one is it is based.

00:42 On wave nature of electrons.

00:54 So because electrons can have two types of nature, electrons can act as particles and they can also act as a wave.

01:03 So because of the wave nature, the discovery of electron microscope was possible.

01:10 Now what happens in electron microscope? so we have electron beam right so like okay okay so electron beam passes through the sample sorry so electron beam passes through the sample to be studied so basically whatever sample we want to study the electron beam will pass through it then through series of lens to magnify the image right so we have electrons then electron beam will pass through the sample and now what happens when it is passing through the sample so let's talk about that this is magnify so basically how image result formed.

03:03 So image results from from scattering of electrons by atoms in the specific sample.

03:42 So what happens? we have beam of electrons.

03:46 We will hit the beam of electrons onto the sample and then there will be scattered.

03:51 Of electrons when they will collide with the atoms in the sample and after that there is formation of image like by collecting all this information from the scattered electrons there will be an image and then we will magnify the image with the help of series of lenses so that's how uh like we can understand the basic principle of electron microscope right so now next is what are the use of electron microscope or we can say applications right so in applications so one thing is it's it is used to examine cells like you understand cells right cells in the human body or cells in the animals in living beings then micro organisms so microorganisms are like the organisms which are very small like amoeba, something like that.

05:27 Okay.

05:28 So microorganisms and then we have metals...

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