Advances in Surface Science by Hari Singh Naiwa (Eds.)

By Hari Singh Naiwa (Eds.)

Floor technology has a variety of purposes that come with semiconductor processing, catalysis, vacuum expertise, microelectronics, flat-panel monitors, compact disks, televisions, pcs, environmental tracking of pollution, biomaterials, synthetic joints, gentle tissues, nutrients safeguard, pharmacy, and plenty of more.This quantity is meant for upper-level undergraduate and graduate scholars in universities, person learn teams and researchers engaged on surfaces of fabrics. it really is of curiosity to chemists, solid-state physists, fabrics scientists, floor chemists, polymer scientists, electric engineers, chemical engineers, and everybody serious about fabrics technology

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Phys. Rev. B60, 2033 (1999), 9 1999, The American Physical Society. FIG. 23. An STM image of a Pt3Sn(001) surface after sputtering and annealing low temperature annealing. 0 nA [89]. Reprinted with permission from M. , Phys. Rev. B60, 2033 (1999), 9 1999, The American Physical Society. ing at higher temperatures (1000 K) destroys the pyramids and large flat terraces are formed with residual atomic chains [89]. It is interesting to note that the metastable structures of the Pt3Sn(001) surface have been found in an early LEED study [90].

Figure 24, the LEED pattern observed in Reference [89], agrees qualitatively with earlier observations. The main spots are due to the basic c(2 • 2) structure of the surface. The streaky intensity between the main spots is caused by the pyramids showing up in the STM topography. In the RHEED pattern (Fig. 22) the pyramids cause the diffraction spot to be on horizontal lines rather than on the Laue circles. This finding is an example of the schematic representation in Figure 21 c. The metastable Pt3 Sn(001) serves here as an example of the need for different surface analytical tools to solve a given problem.

0,6 , ,d | . . . . . 0,7 | . . . . . L . . . 0,9 , .... -/ o o . . . . . 0,5 , . . . . 0,6 o . . . . . 0,7 |. 0,8 . . . . | . . . . . 0,9 | .... 1,0 E/E 0 (b) FIG. 6. (a) LEIS spectrum of 2080 eV He ions scattered from a Au3Pd alloy surface. The angle of incidence is 9 = 45 ~ and the laboratory scattering angle is tO = 90 ~ Note the logarithmic scale and the lack of mass resolution [24]. (b) LEIS spectrum of 1560 eV Ne ions scattered from the same surface as in (a) under identical geometric conditions.

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