Investigation of the surface chemical and electronic states of pyridine-capped CdSe nanocrystal films after plasma treatments using H2, O2, and Ar gases
| العنوان: | Investigation of the surface chemical and electronic states of pyridine-capped CdSe nanocrystal films after plasma treatments using H2, O2, and Ar gases |
|---|---|
| المؤلفون: | Hyung-Ho Park, Ho Jung Chang, Seok Joo Wang, Hyeongtag Jeon, Young Su Lee, Hyuncheol Kim |
| المصدر: | Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 28:559-563 |
| بيانات النشر: | American Vacuum Society, 2010. |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Valence (chemistry), Chemistry, Surfaces and Interfaces, Condensed Matter Physics, Photochemistry, Electron spectroscopy, Surfaces, Coatings and Films, Chemical bond, X-ray photoelectron spectroscopy, Nanocrystal, Atomic physics, Thin film, Spectroscopy, Ultraviolet photoelectron spectroscopy |
| الوصف: | Surface chemical bonding and the electronic states of pyridine-capped CdSe nanocrystal films were evaluated using x-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy before and after plasma treatments using H2, O2, and Ar gases from the viewpoint of studying the effects of surface capping organic molecules and surface oxidation. Surface capping organic molecules could be removed during the plasma treatment due to the chemical reactivity, ion energy transfer, and vacuum UV (VUV) of the plasma gases. With O2 plasma treatment, surface capping organic molecules were effectively removed but substantial oxidation of CdSe occurred during the plasma treatment. The valence band maximum energy (EVBM) of CdSe nanocrystal films mainly depends on the apparent size of pyridine-capped CdSe nanocrystals, which controls the interparticle distance, and also on the oxidation of CdSe nanocrystals. Cd-rich surface in O2 and H2 plasma treatments partially would compensate for the decrease in EVBM. After... |
| تدمد: | 1520-8559 0734-2101 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5da1f37649b60a73b3cba7b4a09d4d0f https://doi.org/10.1116/1.3431079 |
| رقم الأكسشن: | edsair.doi...........5da1f37649b60a73b3cba7b4a09d4d0f |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 15208559 07342101 |
|---|