Metal-insulator Transition-induced Adsorption-Resistant Behavior of Small Au Nanoparticles
- Title
- Metal-insulator Transition-induced Adsorption-Resistant Behavior of Small Au Nanoparticles
- Authors
- KIM, HS; SHIN, SY; UHM, S; HAN, JH; HWANG, HN; KIM, B; CHUNG, J; KIM, YD; HWANG, CC; null
- Date Issued
- 2009-06
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- The size-dependent variation of the. electronic and chemical properties of Au nanoparticles formed on native Si oxide surfaces is investigated using. synchrotron radiation photoemission spectroscopy and ultraviolet photoelectron spectroscopy. The adsorption reactivity toward butanethiol adsorption initially increases with decreasing particle size
however, the reactivity of Au nanoparticles becomes gradually lower below a size of similar to 0.8 nm. The photoemission spectral changes suggest a metal-insulator transition, accompanied by negative charge transfer from the nanoparticles to the support, which may be the source of the chemical inertness of small Au nanoparticles.
- Keywords
- chemisorption; gold; nanoparticles; photoemission spectroscopy; silica; GOLD CLUSTERS; X-RAY; GROWTH; SPECTROSCOPY; OXIDATION; SIZE; AG
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28329
- DOI
- 10.1002/CPHC.2009000
- ISSN
- 1439-4235
- Article Type
- Article
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.