Differential surface partitioning for an ultrasensitive solid-state SERS sensor and its application to food colorant analysis
學年 110
學期 2
出版（發表）日期 2022-02-10
作品名稱 Differential surface partitioning for an ultrasensitive solid-state SERS sensor and its application to food colorant analysis
作品名稱（其他語言）
著者 Chang, Chia-wen; Huang, Chia-chi
單位
出版者
著錄名稱、卷期、頁數 Food Chemistry 383,　132415
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.
關鍵字
語言 zh_TW
ISSN 1873-7072
期刊性質 國內
收錄於
產學合作
通訊作者
審稿制度 0
國別 TWN
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/126167 )