Evaluation of local temperature around the impact points of fast ions
作者： H. Hayashi , T. Kitayama , S. Matsuzaki , K. Nakajima , K. Narumi
DOI: 10.1016/J.NIMB.2015.07.042
关键词: Colloidal gold 、 Transmission electron microscopy 、 Silicon nitride 、 Analytical chemistry 、 Melting point 、 Nanoparticle 、 Ion track 、 Platinum nanoparticles 、 Ion 、 Materials science
摘要: Abstract Gold and platinum nanoparticles of few-nm size were deposited on amorphous silicon nitride (a-SiN) films. These samples irradiated with 1.1 MeV C603+ ions to a fluence ∼5 × 1010 ions/cm2 observed using transmission electron microscopy (TEM). The ion tracks clearly seen as bright spots the metal disappeared from neighboring region (5–10 nm) around each track. platinum-nanoparticle-cleared is slightly smaller than that gold nanoparticles. This trend can be reproduced by u-TS calculations assuming are desorbed when local temperature surpasses melting point was predicted molecular dynamics simulations (Anders et al., 2009). indicates distribution in nanometer evaluated observing desorption different metals having temperatures.
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