title: Magnetron sputtering Si interlayer: a protocol to prepare solid phase microextraction coatings on metal-based fiber.
abstract: Use of metal fibers in solid phase microextraction (SPME) can overcome the fragility drawback of conventional fused-silica ones. However, the surface modification of metal substrates is rather difficult, which largely prevents many mature traditional techniques, such as sol-gel and chemical bonding, being used in fabrication of SPME coating on metal-based fibers. This study demonstrates a protocol to resolve this problem by magnetron sputtering a firm Si interlayer on stainless steel fiber. The Si interlayer was easily modified active group, and attached with a multiwalled carbon nanotubes (MWCNTs) coating using the reported approach. The as-prepared MWCNTs/Si/stainless steel wire fiber not only preserved the excellent SPME behaviors of MWCNTs coatings, but also exhibited a number of advantages including high rigidity, long service life, and good stability at high temperature, in acid and alkali solutions. This new surface modification technique might provide a versatile approach to prepare sorbent coatings on unconfined substrates using traditional methods.
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Li
authors.initials: L
authors.lastname: Ji
authors.forename: Jubai
authors.initials: J
authors.lastname: Li
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Jiang
mesh_terms: D004574:Electromagnetic Fields; D004867:Equipment Design; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010636:Phenols / Q000032:analysis; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000295:instrumentation* / Q000379:methods; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D037742:Nanotubes, Carbon; D010636:Phenols; D014874:Water Pollutants, Chemical; D012825:Silicon