ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
Molecular dynamics simulation using the embedded-atom method is applied to study defectformation and distribution in a hollow Pd nanosphere. It is established that besides vacancies, which cannucleate on the inner or external surfaces, at the external surface, other defects (Shockley partialdislocations, twins and stacking faults) form due to its significant reconstruction by means of a/6〈112〉shears of atomic rows. The density of the defects on the external surface grows with decreasingnanoshell size. It is demonstrated that Shockley partial dislocations can act as vehicles for the transfer ofmaterial from the external surface to the inner surface of the nanoshell thus leading to shrinking. It isshown that the vacancy concentration is higher near both surfaces than in the bulk of the nanoshell
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.129.125.pdf
