Imaging Atomic Structure in Metal Nanoparticles Using High-Resolution Cryo-TEM
| Autor: | Olivier Balmes, Niklas Pettersson, Gunnel Karlsson, Jan-Olle Malm, Jan-Olov Bovin |
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| Rok vydání: | 2005 |
| Předmět: |
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Molecular Materials science business.industry Cryoelectron Microscopy Resolution (electron density) Analytical chemistry Metal Nanoparticles Nanoparticle Sensitivity and Specificity Amorphous solid law.invention symbols.namesake Cryo tem Fourier transform law Image Processing Computer-Assisted symbols Optoelectronics Gold Electron microscope business Metal nanoparticles Field emission gun Instrumentation |
| Zdroj: | Microscopy and Microanalysis. 12:145-150 |
| ISSN: | 1435-8115 1431-9276 |
| DOI: | 10.1017/s1431927606060119 |
| Popis: | It has been shown, by imaging gold (200) planes, that it is possible to achieve better than 0.20-nm structural resolution in cryo-transmission electron microscopy (cryo-TEM). This has been done using commercially available cryo equipment and using a 300-kV field emission gun (FEG) TEM. The images of 15-nm gold particles embedded in amorphous frozen water clearly show the (111) planes (separated by 0.235 nm) in gold. Fourier transform demonstrates the presence of (200) planes in the image, proving a resolution of better than 0.20 nm. The experimental results are supported by image simulations using the multislice method. These simulations suggest that it should be possible to achieve the same resolution even in smaller particles and particles of lighter elements. The crucial experimental problem to overcome is keeping the thickness of the amorphous film low and to work at low electron dose conditions. |
| Databáze: | OpenAIRE |
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