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Tellurite And Fluorotellurite Glasses For Active And Passive

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7. Surface properties; MDO 275<br />

CPS<br />

10<br />

8<br />

6<br />

4<br />

2<br />

x 10 5<br />

Te 3d3/2<br />

CasaXPS<br />

Te 3d5/2<br />

Te 3d<br />

O 1s<br />

Name<br />

O 1s<br />

T e 3d<br />

W 4d<br />

Nb 3p<br />

W 4p1/2<br />

Pos.<br />

530.49<br />

576.49<br />

247.49<br />

365.49<br />

FW HM<br />

2.369<br />

2.164<br />

4.095<br />

3.076<br />

Wide/2<br />

Area<br />

30602.2<br />

78112.6<br />

3265.1<br />

4381.6<br />

W 4p3/2<br />

At%<br />

76.120<br />

18.604<br />

1.460<br />

3.815<br />

Nb 3p1/2<br />

Nb 3p3/2<br />

Nb 3p<br />

C 1s<br />

W 4d3/2<br />

W 4d W 4d5/2<br />

550 500 450 400 350 300 250<br />

Binding Energy (eV)<br />

Fig. (7.7): Wide scan XPS spectrum on a cleaved surface of glass MOD015 (82.5TeO2-<br />

7.5WO3-10Nb2O5 mol. %).<br />

Fig. (7.8): High resolution O1s XPS spectrum on a cleaved surface of glass MOD015<br />

(82.5TeO2-7.5WO3-10Nb2O5 mol. %), with deconvoluted components due to: bridging<br />

and non-bridging oxygens (O1s) and OH (O1s).

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