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 Yu-San Chien; Chia-Wen Chang; Chia-Chi Huang
單位
出版者
著錄名稱、卷期、頁數 Food Chemistry, 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 SERS;hydrophobic;oleophobic;4-aminophenyl disulfide;food colorants
語言 en_US
ISSN 0308-8146
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Chia-Chi Huang
審稿制度
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/122129 )