title: Continuous-time photon-stimulated desorption spectroscopy studies on soft x-ray-induced reactions of CF3Br adsorbed on Si(111)-7×7.
abstract: Continuous-time core-level photon-stimulated desorption (PSD) spectroscopy was used to study the soft x-ray-induced reactions of CF(3)Br molecules adsorbed on Si(111)-7×7 near the Si(2p) edge (98-110 eV). The monochromatic synchrotron radiation was employed as a soft x-ray light source in the photon-induced reactions and also as a probe for investigating the produced fluorination states of the bonding surface Si atom in the positive-ion PSD spectroscopy. Several different surface coverages were investigated. The PSD spectra from the low-CF(3)Br-covered surfaces show the production of surface SiF species, while those from the high-CF(3)Br-covered surfaces depict the formation of surface SiF, SiF(2), and SiF(3) species. The photolysis cross section of the submonolayer CF(3)Br-covered surface is determined as ∼4.3×10(-18) cm(2). A comparison with the results on CF(3)Cl/Si(111)-7×7 surface is discussed.
authors: Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan.
authors: W-C
authors: WC
authors: Tsai
authors: S-K
authors: SK
authors: Wang
authors: T-M
authors: TM
authors: He
authors: L-C
authors: LC
authors: Chou
authors: Y-C
authors: YC
authors: Hsieh
authors: K-Y
authors: KY
authors: Liao
authors: H-C
authors: HC
authors: Chen
authors: C-R
authors: CR
authors: Wen