Non-monotonic size dependence of the elastic modulus of nanocrystalline ZnO embedded in a nanocrystalline silver matrix

Autor:	Panchal, Vinod, Ghosh, Shankar, Gohil, Smita, kulkarni, Nilesh, Ayyub, Pushan
Rok vydání:	2008
Předmět:	Condensed Matter - Materials Science Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
DOI:	10.1088/0953-8984/20/34/345224
Popis:	We present the first high pressure Raman study on nanocrystalline ZnO films with different average crystallite sizes. The problem of low Raman signals from nano sized particles was overcome by forming a nanocomposite of Ag and ZnO nanoparticles. The presence of the nanodispersed Ag particles leads to a substantial surface enhancement of the Raman signal from ZnO. We find that the elastic modulus of nanocrystalline ZnO shows a non-monotonic dependence on the crystallite size. We suggest that the non-monotonicity arises from an interplay between the elastic properties of the individual grains and the intergranular region. Comment: 10 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0805.3944 Zobrazit plný text záznamu View this record from Arxiv