Bond Nature and Surface Curvature

Subscripts 1 and 2 refer to the top first and the second atomic layers in a flat surface, (yss/fsb) approximately equal to 1 — (y /ynj) 

Considering the outermost two atomic layers of a spherical dot, it is possible to derive the T-independent (yds/ db) jis/yO)) function of the bond nature and the curvature by using, zj = 4 x (1 — 0.751K) and Z2 — Zi + 2. According to the core-sheU structure, the size-dependent relative change in a measurable quantity Q follows the scaling relation with the following quantities  

Ideally, the Tq for Au and Ag nanosoUd should follow the m — 1 curve and that of PbS follow the curve of m = 4. However, contamination dming heating should alter the surface bond nature and energy. Therefore, it is no siuprising why the measured data for Au and Ag not follow the m— I curve exactly. Measurements 

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