Toward femtomolar detection of heavy metal ions using uniform liquid crystal films with 1 × 1 cm2 active regions
學年 111
學期 2
出版（發表）日期 2023-03-17
作品名稱 Toward femtomolar detection of heavy metal ions using uniform liquid crystal films with 1 × 1 cm2 active regions
作品名稱（其他語言）
著者 Chen, Chih-hsin
單位
出版者
著錄名稱、卷期、頁數 Optics & Laser Technology 163,　109352
摘要 Photoresist grids (PGs) hosting uniform ligand-doped liquid crystal (LC) films with large active regions of 1 × 1 cm2 are fabricated in this work. The length and thickness of the meshes of the PGs are optimized by studying the anchoring energy of the alignment layers of the LC films. The PGs hosting the LC films exhibit the significant transition of optical signals from dark to bright after the binding of ligand and Hg2+ reorients the LC. The optimized PGs hosting the LC films have an extremely low limit of detection (LOD) of 5.0 ± 0.4 femtomolar (fM) for detecting Hg2+ in aqueous solutions. The LOD is 2 × 106 times lower than those of current LC sensors, and 24 times lower than those of current electrochemical sensors. Without using a polarized optical microscope, the image of a PG hosting an LC film is clearly observed by naked eyes when the film is exposed to an aqueous solution with 5.0 ± 0.4 fM Hg2+. The extremely low LOD and real naked-eye detection are great achievements for the practical applications of LC sensors.
關鍵字
語言 zh_TW
ISSN 1879-2545
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124519 )