Atmospheric Pressure MOCVD of Thin Fe Films on Carbon Fibers

Abstract

Thin iron films grown on carbon fibers were prepared by atmospheric pressure (AP), metal-organic (MO) CVD, which was conducted under pure hydrogen/argon atmospheres. Their crystalline structures and morphologies were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The film growth and structure, as a function of the deposition temperature, hydrogen gas flow rate, and precursor sublimation rate, were investigated. It was concluded that the optimum control of the three above mentioned process parameters was important and essential for obtaining highquality iron film. Based on these analyses and results, a possible deposition mechanism was proposed.

Kinetically Controlled Formation of Supported Nanoparticles in Low Temperature Supercritical Media for the Development of Advanced Nanostructured Materials

“…These supported nanoparticles can present tremendous interests for catalytic applications for example . Such structures can be obtained from conventional dry methods or wet chemistries . However, these processes generally require either high temperature syntheses or post-treatments like purification and drying steps, without ensuring good control on size and size distributions of the obtained nanomaterials.…”

Mechanism and Kinetics of the Thermal Decomposition of Fe(C5H5)2 in Inert and Reductive Atmosphere: A Synchrotron‐Assisted Investigation in A Microreactor

“…In addition to the H‐radicals formed by reaction (Ic), hydrogen molecules are expected to dissociatively adsorb over iron on the surface of the reactor, which leads to a lower dissociation barrier of ferrocene upon hydrogen addition compared to the pure pyrolysis. [ 45 ]…”

“…[ 39 ] Instead, H 2 purges the surface, leading to less carbon coverage, and suppressing the formation of FeC and Fe 3 C. This will lead to more active catalytic iron sites, which in turn enhances the decomposition of ferrocene by generating H‐radicals from the decomposition of ferrocene and a possible contribution of hydrogen to the radical pool, as proposed by Luo and coworkers. [ 45 ]…”

“…[ 44 ] H 2 is also reported to lead to a significantly lower decomposition temperature of ferrocene. [ 6,34,45 ]…”

“…[44] H 2 is also reported to lead to a significantly lower decomposition temperature of ferrocene. [6,34,45] Recently, we demonstrated that vacuum ultraviolet (VUV) synchrotron radiation coupled with a vacuum flash pyrolysis microreactor and photoelectron photoion coincidence (i 2 PEPICO) [46] detection can be used to unravel the gas-phase decomposition of CVD precursors. [47] Thanks to the tunability of the photon energy together with velocity map imaging (VMI), we were able to distinguish fragmentation and direct ionization and thus identify important organometallic and organic reactive intermediates isomer-selectively to elucidate the underlying chemistry.…”