Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/52551

TitleModification of microfluidic paper-based devices with dye nanomaterials obtained by encapsulation of compounds in Y and ZSM5 zeolites
Author(s)Bertão, Ana Raquel
Pires, Nuno
Fonseca, António M.
Soares, Olívia S. G. P.
Pereira, Manuel F. R.
Dong, Tao
Neves, Isabel C.
KeywordsZeolites
dyes molecules
encapsulation
paper-based analytical devices
colorimetric studies
Issue date15-May-2018
PublisherElsevier
JournalSensors and Actuators B: Chemical
CitationBertão, Ana Raquel; Pires, Nuno; Fonseca, António M.; Soares, Olívia S. G. P.; Pereira, Manuel F. R.; Dong, Tao; Neves, Isabel C., Modification of microfluidic paper-based devices with dye nanomaterials obtained by encapsulation of compounds in Y and ZSM5 zeolites. Sensors and Actuators, B: Chemical, 261, 66-74, 2018
Abstract(s)Zeolite nanostructures were used as hosts for dyes normally used in some bioassays (pH and protein), and applied on microfluidic paper-based analytical devices (PADs). The obtained dye nanomaterials were characterized by several techniques (structural (FTIR and XRD), surface (SEM/EDX), textural (N2 adsorption) analyses and dye loading determination by TGA analysis), to confirm the stability of both host and guest. After their deposition on the papers surface, the color change was studied by analyzing the RGB values, taking into account the lifetime and the results stability of the 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 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.
TypeArticle
URIhttp://hdl.handle.net/1822/52551
DOI10.1016/j.snb.2018.01.071
ISSN09254005
Publisher versionhttps://www.journals.elsevier.com/sensors-and-actuators-b-chemical
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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