Tellurite And Fluorotellurite Glasses For Active And Passive

7. Surface properties; MDO 273
CPS
20
18
16
14
12
10
8
6
4
x 10 4
Zn 2p1/2
Zn 2p3/2
Zn 2p
Name
O 1s
F 1s
Zn 2p
Pos.
532.98
684.98
1021.98
FW HM
2.623
3.002
3.335
Area
72.1
1622.5
4790.9
F KLL
modznf3.1
At%
4.409
65.662
29.928
1050 1000 950 900 850 800 750 700 650 600 550
Binding Energy (eV)
CasaXPS
Fig. (7.6): Wide scan XPS spectrum of the fluorinated ZnF2 powder [7].
It can be seen by comparing fig. (7.5) and (7.6) that the O1s peak has been significantly
reduced by fluorination. Table (7.3) summarises the most intense fluorine (1s), zinc
(2p3/2), and oxygen (1s) peaks, from the high resolution XPS scans of the as-received and
fluorinated ZnF2, with atomic and mass compositions of the powders, and theoretical
value from the NIST (National Institute of Standards and Technology) XPS database for
ZnF2 (Zn2p3/2 and F1s) and ZnO (O1s) [7].
F 1s
O 1s