Anisotropic Chemical Reactivity of Gold Spheroids and Nanorods

Autor:	Latha A. Gearheart, Sherine O. Obare, Catherine J. Murphy, Nikhil R. Jana
Rok vydání:	2002
Předmět:	Aspect ratio Cyanide Spheroid Nanotechnology Surfaces and Interfaces Condensed Matter Physics Persulfate Rod chemistry.chemical_compound chemistry Chemical engineering Electrochemistry General Materials Science Nanorod Anisotropy Dissolution Spectroscopy
Zdroj:	Langmuir. 18:922-927
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la0114530
Popis:	We observed anisotropic chemical reactivity of gold spheroids during cyanide dissolution and reaction with persulfate. Cyanide dissolution of 2−5 aspect ratio spheroids (with 12−30 nm short axis) starts at the ends of the long axis and leads to intermediate lower aspect ratio spheroids and spheres. Persulfate converts the spheroids into spheres. In contrast, cyanide dissolution of 18 aspect ratio nanorods (with 16 nm short axis) starts simultaneously at many sites and does not change the nanorod length throughout dissolution. Spheroids are thermally less stable than rods and slowly convert to spheres with time, and thus anisotropic chemical reactivity is presumably due to their lower stability.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e4bf2c316c664828f753f429af85f823 https://doi.org/10.1021/la0114530 Zobrazit plný text záznamu