Magnetic field effect on gas-phase synthesis of metal-containing ultrafine particles from iron pentacarbonyl and carbon disulfide

Abstract

From a gaseous mixture of Fe(CO) 5 and CS 2 , sedimentary aerosol particles involving organometal compounds were produced under UV light irradiation at 313 nm. Chemical composition of the sedimentary aerosol particles was controlled by a magnetic field and by post-exposure with UV light. By applying a magnetic field up to 5 T, photochemical reactivity of Fe(CO) 5 molecules was promoted and the amount of chemical species originating from Fe(CO) 5 increased with increasing magnetic field. By irradiating UV light upon the deposited particles, solid-state photochemical reactions took place in the particles, and CO groups bonded to Fe atom were effectively evolved from the sedimentary aerosol particles. These methods can be utilized to modify chemical composition of the metal-containing sedimentary particles. q

Magnetic Field Effect on Chemical Compositions of Magnetic Aerosol Particles Synthesized Photochemically from a Gaseous Mixture of Iron Pentacarbonyl and Trimethylsilyl Azide

“…Due to these characteristics inherent in the sedimentary particles, the particles can be utilized as building blocks of nanodevices, and in particular, metal containing aerosol particles are suitable for fabricating nanopatterns in nanolithography (Morita 1999). Using the photochemical method mentioned above, metal containing aerosol particles were synthesized from a gaseous mixture containing iron pentacarbonyl (Fe(CO) 5 ), cobalt tricarbonyl nitrosyl (Co(CO) 3 NO), and/or 2-propenyltrimethylsilane (allyltrimethylsilane) (ATMeSi) (Abe and Morita 2006;Morita et al 2006bMorita et al , 2008Morita et al , 2009. Because ATMeSi can ligate to metal atoms through π -coordination of allyl group and can incorporate into the nucleation reactions during aerosol particle formation, the addition of ATMeSi improved the efficiency of nucleation reactions (Morita and Ishikura 2005;Morita el al.…”

Magnetic susceptibility measurement of single iron/cobalt carbonyl microcrystal by atmospheric magnetophoresis

“…Recently, the magnetic field effect on the chemical composition of several microparticles grown in gaseous phase via photochemical reaction has been discovered [31][32][33]. When an external magnetic field was applied, the chemical composition and morphology of deposited microparticles varied [34]. The chemical composition could be determined by several techniques such as infrared absorption spectroscopy, x-ray photoelectron spectroscopy (XPS), and electron probe microanalysis.…”