Differential surface partitioning for an ultrasensitive solid-state SERS sensor and its application to food colorant analysis

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 期刊論文 > Item 987654321/126167

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題名:	Differential surface partitioning for an ultrasensitive solid-state SERS sensor and its application to food colorant analysis
作者:	Chang, Chia-wen;Huang, Chia-chi
日期:	2022-02-10
上傳時間:	2024-09-11 12:05:52 (UTC+8)
摘要:	Solid-state SERS sensors are desirable point-of-care tools due to their portability. However, the level of SERS sensitivity achieved in liquid phase is rarely duplicated in the solid phase. We report herein the fabrication of a SERS sensor using alumina beads as the solid support and demonstrate its high SERS sensitivity with the model analyte 4-aminophenyl disulfide (4-APDS). The key to sensitivity is a hydrophilic-hydrophobic surface gradient constructed by sequentially coating with the surfactant cetyltrimethylammonium bromide and fluorous 1H,1H,2H,2H-perfluorooctyltriethoxysilane. The surface gradient, together with chloride etching, allows the detection of 4-APDS at the low concentration of 10−15 M. The practicality of the sensor beads is evidenced by successfully tracking the SERS fingerprints of five food colorant standards in the SERS spectra of a popular candy product. These SERS sensor beads are easy to prepare, convenient to use, and highly responsive as a SERS platform for the analysis of colorants.
關聯:	Food Chemistry 383,　132415
DOI:	10.1016/j.foodchem.2022.132415
顯示於類別:	[化學學系暨研究所] 期刊論文

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