Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1218, Issue 20, Pages 2835-2840Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2011.03.047
Keywords
Magnetron sputtering; Si interlayer; Solid phase microextraction; Multiwalled carbon nanotubes
Funding
- National Natural Science Foundation of China [20975105, 20775084, 20875096]
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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. (C) 2011 Elsevier B.V. All rights reserved.
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