Abstract
We present a new approach to quantify the mass and 3D shape of nanoparticles on supports, using sizeselected
nanoclusters as mass standards in scanning transmission electron microscope. Through quantitative
image intensity analysis, we show that the integrated high angle annular dark field intensities of
size-selected gold clusters soft-landed on graphite display a monotonic dependence on the cluster size as
far as 6500 atoms. We applied this mass standard to study gold nanoparticles prepared by thermal vapor
deposition and by colloidal wet chemistry, and from which we deduced the shapes of these two types of
nanoparticles as expected.
| Original language | English |
|---|---|
| Article number | 246103 |
| Pages (from-to) | 246103/1-246103/4 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 101 |
| DOIs | |
| Publication status | Published - 2008 |