A simple and fast responsive colorimetric moisture sensor based on symmetrical conjugated polymer

Mergu, Naveen; Kim, Hyorim; Ryu, Jiwon; Son, Young‐A

doi:10.1016/j.snb.2020.127906

Cited by 29 publications

(15 citation statements)

References 52 publications

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“…For example conjugated polydiacetylene (PDA) has been used as ink to print moisture sensors thanks to a dramatic color change from blue to red in the presence of water (Figure 3D). [ 71 ] Combining polydiacetylene with PPy enabled the fabrication of temperature transducers for detecting near infrared (NIR) light. [ 72 ] In this work, the PPy modified paper fibers generate heat upon irradiation with NIR light, which changes the dynamic structure of PDA layers doped with Zn(II) and results in a color change.…”

Section: Transducersmentioning

confidence: 99%

“…Fluorescence based Fe(III) sensor [70] Conjugated PDA inks Colorimetric moisture sensor [71] PDA:PPy layers Temperature sensor for detecting near infrared (NIR) light [72] PDA-diynediamides in a PVC film HCl gas sensors [73] multilayered materials retained the foldable and cuttable nature of paper, which enabled shaping them into 3D structures using origami and kirigami techniques. The pressure sensors were successfully used to monitor human physiological signals and motions such as respiration, pulse, muscle movement and gait, which made them promising materials for developing wearable sensors.…”

Section: Polymer Applicationmentioning

confidence: 99%

mentioning

confidence: 99%

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Polymer Components for Paper‐Based Analytical Devices

Campo

Vaquer

Rica

2022

Adv Materials Technologies

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In recent years, paper has become an essential substrate material for developing different types of sensors, from wearable devices to single‐use test strips and biosensors. In parallel, a polymer‐based toolbox has emerged in order to add additional functions to these paper‐based analytical devices. In this article, examples are compiled from the recent literature showing microfluidic systems based on printing impermeable polymer barriers with different methods as well as the implementation of electrochemical, fluorescent, and colorimetric polymer‐based transducers in paper‐based analytical platforms. Externally actuated or dissolvable polymer valves and reservoirs, analyte concentrators, and separation devices, as well as polymer‐based recognition elements (molecularly imprinted polymers) printed on paper substrates are also reviewed. The search has revealed a plethora of possibilities for developing complex lab‐on‐chip devices implementing different polymer‐based components in them. The ability of patterning these polymers with common printing methods that do not require specialized facilities paves the way for mass producing this kind of advanced paper‐based analytical device.

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Section: Transducersmentioning

confidence: 99%

Section: Polymer Applicationmentioning

confidence: 99%

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Polymer Components for Paper‐Based Analytical Devices

Campo

Vaquer

Rica

2022

Adv Materials Technologies

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“…On the contrary, non-invasive techniques commonly employed on the characterization of nanocomposites, such as Fourier transform infrared (ATR-FTIR), ultra-violet visible UV-vis, and Raman spectroscopies, are also employed to identify the presence of the nanoparticles, but present limitations to quantify their amount [21,31,33]. In addition, there are less conventional non-invasive techniques which can be employed on nanocomposites, such as colorimetry [31][32][33][34][35] and x-ray radiography, [9,[36][37][38] which has not been previously tested with this aim.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, colorimetry analysis can be carried out with inexpensive and portable instruments which allow the in situ testing of diverse materials working as sensors [32][33][34][35]. For instance, Wang et al [32] reported the use of ZnO/ZnFe 2 O 4 /graphene foams as a sensing platform for colorimetric detection of hydroquinone, showing their potential for actual environmental pollutant analysis on river waters.…”

Section: Introductionmentioning

confidence: 99%

Non-Invasive Approaches for the Evaluation of the Functionalization of Melamine Foams with In-Situ Synthesized Silver Nanoparticles

et al. 2020

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The use of polymeric nanocomposites has arisen as a promising solution to take advantage of the properties of nanoparticles (NPs) in diverse applications (e.g., water treatment, catalysis), while overcoming the drawbacks of free-standing nanoparticles (e.g., aggregation or accidental release). In most of the cases, the amount and size of the NPs will affect the stability of the composite as well as their performance. Therefore, a detailed characterization of the NPs present on the nanocomposites, including their quantification, is of vital importance for the optimization of these systems. However, the determination of the NPs load is often carried out by destructive techniques such as TGA or ICP-OES, the development of non-invasive approaches to that aim being necessary. In this work, the amount of silver NPs synthesized directly on the surface of melamine (ME) foams is studied using two non-invasive approaches: colorimetry and X-ray radiography. The obtained results show that the amount of silver NPs can be successfully determined from the luminosity and global color changes of the surface of the foams, as well as from the X-ray attenuance.

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