Abstract
Mullite nanowhiskers are prepared by a facile technique at low temperature using mica and AlF3 as raw material. Mica acts as reactant as well as substrate. By controlling the reaction temperature and holding time, the mullite nanowhisker array with uniform morphology is obtained. The nanowhisker array possesses Al-rich single crystalline with an average of 80 nm in diameter and 20 μm in length. After decorated with Au nanoparticles, the array exhibits high surface enhanced Raman scattering (SERS) activity with an SERS enhancement factor (EF) of 1.35 × 109. It also remains good SERS signal detection with a relative standard deviation of 7.33% under corrosion condition.
Highlights
Mullite nanowhiskers are prepared by a facile technique at low temperature using mica and AlF3 as raw material
The key factors affecting the morphology of mullite nanowhiskers array were studied
Large scale mullite whisker array with uniform morphology is synthesized at 900uC for 3 h in static air using mica as substrate
Summary
Mullite nanowhiskers are prepared by a facile technique at low temperature using mica and AlF3 as raw material. It remains good SERS signal detection with a relative standard deviation of 7.33% under corrosion condition. Mica can be processed into flaky shape because of its crystal character[30] It can be adopted as raw material as well as substrate to produce mullite whisker array. The array decorated with Au nanoparticles is applied as SERS substrate It exhibits high sensitivity in SERS detection of a target analyte, Rhodamine B (RhB). The SERS signal remains high sensitive and stable with a relative deviation of 7.33% under corrosion condition
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