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Li CM Robertson IM Jenkins ML Hutchison JL Doole RC 《Micron (Oxford, England : 1993)》2005,36(1):9-15
The nucleation, growth, and coalescence of silver oxide nanoparticles have been investigated dynamically and at high spatial resolution by using the electron beam of a transmission electron microscope to stimulate and to observe the processes. Under the assumption the particles are hemispherical, the growth rate was found to be proportional to the square root of the electron irradiation time. This result suggests that the rate-limiting step is the attachment of atoms to the nanoparticles. Growth of the nanoparticles occurred by the addition of columns of atoms on {111} planes. Particle impingement resulted in interpenetration of the particles and, ultimately, the formation of a grain boundary. 相似文献
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Characterization of magnetic nanoparticles using energy-selected transmission electron microscopy. 总被引:2,自引:0,他引:2
María J Sayagués Teresa C Rojas Asunción Fernández Rafal E Dunin-Borkowski Ron C Doole John L Hutchison 《Microscopy and microanalysis》2002,8(5):403-411
Fe, Co, and Ni magnetic nanoparticles have been characterized using energy-selected imaging in a high-resolution transmission electron microscope. The samples comprised Fe/FeO x and Co/CoO x nanoparticles synthesized by inert gas evaporation and a Ni/C nano-composite prepared by a sonochemical method. All of the particles examined were found to be between 5 and 30 nm in size, with the Fe and Co crystals coated in 5-10 nm of metal oxide layer and the Ni metallic crystallites embedded in an amorphous carbon spherical matrix. 相似文献
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J.M. Ballesteros R. Hernández J.M. Herreros C.N. Afonso A.K. Petford-Long R.C. Doole 《Applied Physics A: Materials Science & Processing》1997,65(4-5):463-467
Received: 11 June 1997/Accepted: 12 June 1997 相似文献
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R. Serna T. Missana C.N. Afonso J.M. Ballesteros A.K. Petford-Long R.C. Doole 《Applied Physics A: Materials Science & Processing》1998,66(1):43-47
Received: 1 September 1997/Accepted 8 September 1997 相似文献
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