期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 261, 期 -, 页码 66-74出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.01.071
关键词
Zeolites; Dyes molecules; Encapsulation; Paper-based analytical devices; Colorimetric studies
资金
- ERASMUS+ program
- Norte Portugal Regional Operational Programme (NORTE) under the Portugal Partnership Agreement through the European Regional Development Fund (ERDF) [NORTE-01-0145-FEDER-000004, NORTE-01-0145-FEDER-000006]
- ERDF through COMPETE-Programa Operacional Competitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-006984]
- Associate Laboratory LSRE-LCM
- FCT, Fundacao para a Ciencia e a Tecnologia [PTDC/AAGTEC/5269/2014]
- Centre of Chemistry [UID/QUI/00686/2013, UID/QUI/0686/2016]
- Oslofjordfondet project, <<Touchsensor for enklere og raskere urinprovetaking og analyse>> [234972]
- NSFC [61650410655]
Zeolite nanostructures were used as hosts for dyes normally used in some bioassays (pH and protein), and applied on microfluidic paper-based analytical devices (mu PADs). The obtained dye nanomaterials were characterized by several techniques (structural (FTIR and XRD), surface (SEM/EDX), textural (N-2 adsorption) analyses and dye loading determination by TGA analysis), to confirm the stability of both host and guest. After their deposition on the paper's surface, the color change was studied by analyzing the RGB values, taking into account the lifetime and the results stability of the mu PADs. These results confirmed that both the lifetime and the color change of the modified devices were stable over one week. It was also demonstrated that the choice of the paper for the mu PAD as well as the zeolite nanostructures properties influences the colorimetric response. This strategy by encapsulating dyes into zeolites solve current challenges in colorimetric sensors in where long-term stability of the colorimetric results is an issue. The results obtained were promising for the studied assays, and the strategy could also be extended to other bioassays. (C) 2018 Elsevier B.V. All rights reserved.
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