Application Of Atomic Force Microscope In Material And Life Science

Scanning probe microscope(SPM) break the diffraction barrier. SPM is absolutely different from the conventional microscope. The probe, which scale is several nanometers, scanns across the surface of the sample. SPM can obtain more ultrastructure information of the sample. Atomic force microscope(AFM) is an important member of SPM family. AFM is an important and useful tool in material and life science.Primary investigation of high density near-field optical recording is studied based on the AFM system in this paper. Some important results are obtained. he process of writing and reading on Ge2Sb2Te5 films is achieved. Effective advises are put forward to improve the writing and reading system in the future.ZnO, which is a semiconductor of II -VI group, is a up-and-coming UV Optoelectronic parts of an apparatus. High c-axis oriented ZnO films on Si (100) are deposited by radio-frequency reactive magnetron sputtering. There are several characteristics of ZnO films analysed and sudied using atomic force microscopy (AFM) and Raman spectroscopy, such as topography, grains, RMS roughness and Raman spectroscopy. It is found that the results of atomic force microscopy are approximately same with that of Raman spectroscopy. Results of AFM are as following. With increasing the oxygen partial pressure from 8.75% to 50%, grains and RMS roughness of ZnO films decreased. When the oxygen partial pressure exceeds 50%, grains and RMS roughness of ZnO films is roughly a constant.AFM has been a powerful and useful imaging tool in material and life science. AFM is used to image Escherichia coli, Staphylococcus aureus cells and dog's kidney cell. Their surface construction are deeply investigated in this paper.