Barrier-free patterned paper sensors for multiplexed heavy metal detection
| Autor: | Rong Cao, Miaosi Li, Liming Zhang, Liyun Guan, Zhuoxuan Lu, Junfei Tian, Jing Wu |
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| Rok vydání: | 2019 |
| Předmět: |
Fabrication
Chemistry 010401 analytical chemistry Data interpretation Nanotechnology Information embedding Heavy metals 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Signal Multiplexing 0104 chemical sciences Analytical Chemistry Proof of concept 0210 nano-technology |
| Zdroj: | Talanta. 196:408-414 |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2018.12.096 |
| Popis: | Patterned paper sensors such as letter- and barcode-shaped sensors have become a subject of growing interest due to the potential in information embedding and data interpretation, which brings a requirement on easily fabricating these paper-based analytical devices. The answer, in part, may lie in the influence of paper structure on the performance of paper-based analytical devices. After investigating the effect of physical properties of paper on precipitation and non-precipitation assays for detecting Fe(II), here we propose a simple and promising approach for barrier-free paper patterning. Without building hydrophobic boundaries, the precipitates of sensing reactions on low-bulk and medium-thick paper substrates allow patterned signal readout directly. As a proof of concept, barrier-free patterned paper sensors for detecting heavy metals were fabricated, with detection limits of 0.25 ppm for Fe(II), 0.4 ppm for Ni(II), and 0.5 ppm for Cu(II). Our work provides a valuable perspective on fabrication of patterned paper sensors. |
| Databáze: | OpenAIRE |
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