6.3 Gold
107
DOS
Energy(eV)
Ag 147
Ag 55
Ag 13
(c)
-8
-6
-4
-2
0
2
-8
-6
-4
-2
0
2
LDOS
Energy/eV
Ag 75
1st
2nd
3rd
(b)
(a)
Fig. 6.4 a STS spectra of Ag clusters deposited on Ag(111) surface with inset showing the STM
images of Ag 1 , Ag 2 , and a quasi-dimer (middle) [46, 47]. DFT derived shell-resolved,b Ag 75
LDOS and c size-resolved DOS polarization for Ag n clusters [11]. Reprinted with permission from
Copyright 2008 American Physical Society. Copyright 2009 IOP Publishing Ltd. Copyrght of the
PCCP Owner Societies
Table 6.1 The E 4f (0) of an isolated Au atom and its bulk shift 4f (12) obtained from decoding the
size-dependent E 4f (K) of Au nanosolids [5] in comparison to that derived from skin XPS analysis
(Sect. 6.4.3)
Au/Octane
Au/TiO 2
Au/Pt
Au skins
m [5]
1
τ
3
1
1
1
E 4f (0)
81.504
81.506
81.504
80.726
E 4f (12)
84.370
83.692
E 4f (12)
2.866
2.864
2.866
2.866
The charging effect of nanocrystals offset the E 4f (0) but not the 4f (12) [45]