Energy dispersive X-ray reflectivity applied to the study of thermal stability of self-assembled organic multilayers: Results on phosphonic acids

Thermal Stability and Ordering Study of Long- and Short-Alkyl Chain Phosphonic Acid Multilayers

“…However, in systems with rapid structural changes such as phase transitions or chemical reactions, the angular resolution may not be a crucial parameter. The EDD technique provides then short time of data acquisition allowing the precise monitoring of the changes in the periodicity configuration or reaction time. − Thus, EDD was used here to investigate changes in periodicity on OPA and OcPA multilayers as a function of the temperature. Finally, the in-plane configuration of OPA multilayers was studied by small and wide angle X-ray scattering (SAXS/WAXS).…”

Microstructure and Phase Behavior of a Quinquethiophene-Based Self-Assembled Monolayer as a Function of Temperature

“…Similar temperatureinduced changes of the tilt angle have been observed in SAMs of phosphonic acids. 35 The unit-cell parameters as a function of temperature ( Figure 6) show that the enlargement of the unit cell was isotropic. The lattice constants expanded by about 0.2 Å in the temperature range from 300 to 500 K. The observed thermal expansion is comparable to that of other SAMs on silicon oxide surfaces.…”

2013 Atomic spectrometry update—A review of advances in X-ray fluorescence spectrometry

“…Angular-resolved X-ray reectivity measurements and energy dispersive X-ray reectivity experiments were performed at the XRF beamline in Campinas at the Brazilian SR light source to study the temperature evolution of self-assembled phosphonic acid multilayers. Results of these experiments published by de Pauli et al 57 showed that the precise monitoring of phase transitions observed in organic thin lm and multilayer systems was possible. Multilayers with a different bilayer periodicity of 5 nm straight and 3.4 nm tilted, were studied.…”

“…The authors concluded that there is a need for new theoretical calculations of K-shell uorescence yields of low-Z elements. Apaydin and Tirasoglu 99 determined K-to L-shell transfer probabilities for 11 high-Z elements applying 57 Co radioisotope source excitation with the 123.6 keV gamma photons. In a pure literature study, Kahoul et al 100 compiled the published data on K-shell uorescence yields, generated between 1994 and 2011.…”