Differential charging in SiO2/Si system as determined by XPS

Download

index.pdf

Date

2004-01-29

Author

Karadas, F
Ertaş, Gülay
Suzer, S

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

237
views

0
downloads

The Si2p binding and the Si-KLL kinetic energy difference between the SiO2 layer and Si substrate is shown to be influenced by application of external voltage bias to the sample holder due to the differential charging as was already reported earlier (Ulgut, B.; Suzer, S. J. Phys. Chem. B 2003, 107, 2939). The cause of this bias induced (physical)-shift is now proven to be mostly due to partial neutralization by the stray electrons within the vacuum system by (i) introducing additional stray electrons via a filament and following their influence on the measured binding energy as a function of the applied voltage, (ii) measuring the Auger parameter. It is also shown that citrate-capped gold nanoclusters deposited on the SiO2/Si system experience differential charging similar to that of the oxide layer rather than the silicon substrate.

Subject Keywords

Physical and Theoretical Chemistry, Materials Chemistry, Surfaces, Coatings and Films

URI

https://hdl.handle.net/11511/36096

Journal

JOURNAL OF PHYSICAL CHEMISTRY B

DOI

https://doi.org/10.1021/jp035498g

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

XPS analysis with external bias: a simple method for probing differential charging Ertaş, Gülay (Wiley, 2004-07-01) The XPS spectra of thermally grown oxide layers on Si, Al, W and Hf substrates have been recorded while the samples were subjected to external d.c. voltage bias. The bias induces additional shifts in the measured binding energy differences between the XPS peaks of the oxide and that of the metal substrate in Si and Al (as probed both in the 2p and the KLL Auger regions), but not in W and Hf (as probed in the 4f region). These bias induced shifts are attributed to differential charging between the oxide laye...
Physical Characterization of Inclusion Complexes of Triphenyl Phosphate and Cyclodextrins in Solution. Zhang, N; Zane, CP; Chen, Y; Yıldırım, Erol; Hinks, D; Tonelli, AE; Vinueza, NR; Pasquinelli, MA (American Chemical Society (ACS), 2020-01-16) The goal of this work is to provide physical insights into the formation and stability of inclusion complexes (ICs) in aqueous solution between cyclodextrins (CDs) and a common flame retardant, triphenyl phosphate (TPP). Quantum chemistry calculations reveal the possible energetically favorable geometries of TPP in their 1:1 IC form with α-, β-, and γ-CDs as well as their associated complexation, conformational, and interaction energies. High-resolution mass spectrometry (MS) and tandem MS were used with el...
Dielectric Properties of Ethanol and Gasoline Mixtures by Terahertz Spectroscopy and an Effective Method for Determination of Ethanol Content of Gasoline ARIK, Enis; Altan, Hakan; Esentürk, Okan (American Chemical Society (ACS), 2014-05-01) Investigation of frequency dependent permittivity of mixture solutions provides information on the role of intermolecular interactions on relaxation processes of solvent and solute molecules. In this study the dielectric properties of ethanol/gasoline mixtures in the terahertz spectral region are investigated. Frequency dependent absorption coefficients, refractive indices, and complex permittivities of pure ethanol and gasoline, and their mixtures at varying ethanol volume percentages (v/v %) are reported....
Kinetic study of the reaction between hydroxyl-terminated polybutadiene and isophorone diisocyanate in bulk by quantitative FTIR spectroscopy Kincal, D; Özkar, Saim (Wiley, 1997-12-05) A kinetic study of the reaction between a hydroxyl-terminated polybutadiene (HTPB) and isophorone diisocyanate (IPDI) was carried out in the bulk state by using quantitative Fourier transform infrared(FTIR) spectroscopy. The reaction is shown to obey a second-order rate law, being first order in both the HTPB and IPDI concentrations. The activation parameters obtained from the evaluation of kinetic data are Delta H-double dagger = 41.1 +/- 0.4 kJ mol, Delta S-double dagger = -198 +/- 2 J K-1 mol(-1) and E-a...
Temperature-Induced Activation of Graphite Co-intercalation Reactions for Glymes and Crown Ethers in Sodium-Ion Batteries Goktas, Mustafa; Akduman, Baris; Huang, Peihua; Balducci, Andrea; Adelhelm, Philipp (American Chemical Society (ACS), 2018-11-29) The intercalation of solvated ions into graphite leads to ternary graphite intercalation compounds (t-GICs). Here, we study the impact of temperature on the electro-chemical activity of graphite electrodes for co-intercalation reactions between 20 and 80 degrees C in sodium cells. For this, a range of linear ethers (mono-, di-, tri-, and tetraglyme) are studied. For the first time, pentaglyme and several crown ethers are also investigated. We find that several solvents that appear as unsuitable for the co-i...

Citation Formats

F. Karadas, G. Ertaş, and S. Suzer, “Differential charging in SiO2/Si system as determined by XPS,” JOURNAL OF PHYSICAL CHEMISTRY B, pp. 1515–1518, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36096.