https://scholars.lib.ntu.edu.tw/handle/123456789/598231
標題: | Theoretical modeling of nanopore-based detection of trace concentrations of cesium ions in an aqueous environment | 作者: | Yang Y.-C Hsu J.-P. JYH-PING HSU |
關鍵字: | Absorption spectroscopy;Electric rectifiers;Electrochemical sensors;Ions;Nanopores;Regression analysis;Aqueous environment;Background salts;Cesium ions;Cone angle;Detection limits;Ion current rectifications;Modified layer;Surface-modified;Theoretical modeling;Trace concentrations;Ethylene | 公開日期: | 2021 | 卷: | 125 | 期: | 43 | 起(迄)頁: | 24211-24220 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | A conical poly(ethylene terephthalate) nanopore surface modified with a p-tert-butylcalix[4]arene crown is adopted to theoretically model the detection of trace concentrations of cesium ions in an aqueous environment through its ion current rectification (ICR) behavior. In particular, the background salt, the modification length of the modified layer, and the half cone angle of the nanopore are examined for their influence on the performance of the nanopore, which is measured by its ICR factor. The results of regression analysis for the dependence of the ICR ratio on the concentration of cesium ions suggest that the background salt appreciably influences the detection limit, and the optimum performance can be achieved by choosing a modified layer length of 1000 nm and half cone angle of 1°, where the widest detection range is [0.3, 500 nM] and the lowest detection limit is 0.3 nM. This detection limit is lower than those of the commonly used analytical tools such as atomic absorption spectroscopy, optical chemosensors, and electrochemical sensors. ? 2021 American Chemical Society |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118770029&doi=10.1021%2facs.jpcc.1c07496&partnerID=40&md5=77cc92182fa241d1ef752912d5e9a9f8 https://scholars.lib.ntu.edu.tw/handle/123456789/598231 |
ISSN: | 19327447 | DOI: | 10.1021/acs.jpcc.1c07496 |
顯示於: | 化學工程學系 |
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