Electron Microscopy Assignment

Assignment

Transmission Electron Microscopy (TEM)

Submitted To: Sir Yasir Jamil Submitted By: Amna Manzoor M.phil Physics (Evening)

Semester 1st

Department Of Physics

University Of Agriculture

Faisalabad

Principle:

Transmission Electron Microscopy (TEM) Transmission electron microscopy transmits energetic electrons through the specimen to get high resolution image.

History: In 1931, Ernst Ruska with the help of Max Knolls developed the first electron microscope, known as Transmission electron Microscope. After increasing its magnification power Ruska joined the Sieman’s

These differences provide information about the structure, texture, shape and size of the specimen.

Advantages:

1. Transmission Electron microscope reviles the minor details of the object. Because electron has shorter wavelength.

2. Transmission electron microscope gives a highly magnified image.

3. Transmission electron microscope gives information about surface features, shape, size and structure. Applications:

1. TEM can be used for research and studies in universities and colleges.

2. If some material is being viewed by TEM. It gives the information about material’s structure.

3. The analysis of sample’s chemical composition can be performed in the TEM.

4. Transmission electron microscope is used in different fields such as life sciences, nanotechnology, medical, biological and material research, forensic analysis, gemology and metallurgy as well as industry and education

5. TEM can be used for topographical and morphological information.

6. TEM can be used in semiconductor analysis.

7. TEM can be used in manufacturing of computer and silicon chips.

8. Technology companies use TEM to identify flaws, fractures and damages to micro-sized objects

Researchers can do research on molecular scale.

Review of Literature:

 Curry et al., (2006) write that transmission electron microscopy is used for the clinical study of viral and bacterial infections: Present and Future. TEM is useful to study different diseases such as smallpox, Hepatitis A, Hepatitis B, exotic virus infections, new infectious agents, viral gastroenteritis etc.

 Nemec et al., (2015) study the Mg and Zn alloy by using transmission electron microscope and find three distinct intermetallic particles.

 Wang (2000) study crystal and surface structures of nanophase materials by using transmission electron microscope .because it will give physical and chemical properties of the materials. TEM is demonstrated for characterizing and measuring the thermodynamic, electric, and mechanical properties of individual nanostructures, from which the structure−property relationship can be registered with a specific nanoparticle/structure.

References:

Curry , A., H. Appleton and B. Dowsett . 2006 Application of transmission electron microscopy to the clinical study of viral and bacterial infections: Present and Future . Micron , 37 (2006):