QRsens: Dual-purpose quick response code with built-in colorimetric sensors

Escobedo, Pablo; Ramos-Lorente, Celia E.; Ejaz, Ammara; Erenas, Miguel M.; Martínez-Olmos, Antonio; Carvajal, M.; García-Núñez, Carlos; Orbe-Payá, Ignacio de; Capitán-Vallvey, L.F.; Palma, A.

doi:10.1016/j.snb.2022.133001

Cited by 26 publications

(20 citation statements)

References 54 publications

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“…12,13 The strip uses a chromogenic reaction to indicate presence and concentration of H 2 O 2 in aqueous sample, while scanning the QR code leads to a PDF for interpretation of results. [14][15][16][17] The point-of-test QR-integrated chromogenic paper strip has an LOD of 0.0005% (v/v) H 2 O 2 . The QRintegrated chromogenic paper strip can serve as a promising tool 18 to assess food quality and authenticity by consumers, regulatory authorities, and food industries.…”

Section: Introductionmentioning

confidence: 99%

A QR code-integrated chromogenic paper strip for detection of hydrogen peroxide in aqueous samples

Rai,

Verma,

Mehrotra

et al. 2023

Anal. Methods

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Section: Introductionmentioning

confidence: 99%

A QR code-integrated chromogenic paper strip for detection of hydrogen peroxide in aqueous samples

Rai,

Verma,

Mehrotra

et al. 2023

Anal. Methods

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“…They are however prone to counterfeiting, difficult to miniaturize while maintaining easily detectable, and cannot offer information on the intactness of their host. [15,16,17] To overcome these limitations, miniaturized ID codes that enable even tiny objects to be distinguished, [15,[18][19][20][21][22][23][24][25][26][27][28][29][30][31] ID codes with physical unclonable functions (PUFs) that aim to erase the concerns of counterfeiting, [32,33,34,35] responsive ID codes, [36][37][38][39][40][41] and wireless identification and sensing platforms (WISPs) [42] were introduced. Responsive ID codes and WISPs augment the ID signal of QR codes and RFIDs with real-time information from their physical environment, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these limitations, miniaturized ID codes that enable even tiny objects to be distinguished, [ 15,18–31 ] ID codes with physical unclonable functions (PUFs) that aim to erase the concerns of counterfeiting, [ 32,33,34,35 ] responsive ID codes, [ 36–41 ] and wireless identification and sensing platforms (WISPs) [ 42 ] were introduced. Responsive ID codes and WISPs augment the ID signal of QR codes and RFIDs with real‐time information from their physical environment, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Responsive QR codes exploit the environmentally sensitive optical signal of their graphical encoding elements, i.e., the ink, to report not only an ID signature but also for example the current temperature [ 38 ] or the presence of specific gases. [ 37 ] Similarly, WISPs enrich the ID code of RFIDs with information on temperature, [ 43 ] humidity, [ 44 ] mechanical stress, [ 45 ] or other stimuli [ 46 ] via circuit‐connected, (micro‐)electrical capacitive or resistive sensors.…”

Section: Introductionmentioning

confidence: 99%

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Communicating Supraparticles to Enable Perceptual, Information‐Providing Matter

Reichstein,

Müssig,

Wintzheimer

et al. 2023

Advanced Materials

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Materials are the fundament of the physical world, whereas information and its exchange are the centerpieces of the digital world. Their fruitful synergy offers countless opportunities for realizing desired digital transformation processes in the physical world of materials. Yet, to date, a perfect connection between these worlds is missing. From the perspective, this can be achieved by overcoming the paradigm of considering materials as passive objects and turning them into perceptual, information‐providing matter. This matter is capable of communicating associated digitally stored information, for example, its origin, fate, and material type as well as its intactness on demand. Herein, the concept of realizing perceptual, information‐providing matter by integrating customizable (sub‐)micrometer‐sized communicating supraparticles (CSPs) is presented. They are assembled from individual nanoparticulate and/or (macro)molecular building blocks with spectrally differentiable signals that are either robust or stimuli‐susceptible. Their combination yields functional signal characteristics that provide an identification signature and one or multiple stimuli‐recorder features. This enables CSPs to communicate associated digital information on the tagged material and its encountered stimuli histories upon signal readout anywhere across its life cycle. Ultimately, CSPs link the materials and digital worlds with numerous use cases thereof, in particular fostering the transition into an age of sustainability.

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“…Owing to its compatibility with printing technologies. the proposed sensor can be produced in a text or barcode form, and the degree of food spoilage can be identified through connectivity with a mobile device [26,32]. To ensure printability, polyacrylonitrile (PAN) was incorporated in the hydrogel as the viscous agent and a matrix to enable the rapid transport of ions [23].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Printable Colorimetric Food Sensor Based on Hydrogel for Low-Concentration Detection of Ammonia

et al. 2022

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With the increasing market share of ready-to-cook foods, accurate determination of the food freshness and thus food safety has emerged as a concern. To commercialize and popularize food sensing technologies, food sensors with diverse functionalities, low cost, and facile use must be developed. This paper proposes printable sensors based on a hydrogel-containing pH indicator to detect ammonia gas. The sensors were composed of biocompatible polymers such as 2-hydroxyethyl methacrylate (HEMA) and [2-(methacryloyloxy)ethyl] trimethylammonium chloride (MAETC). The p(HEMA-MAETC) hydrogel sensor with bromothymol blue (BTB) demonstrated visible color change as a function of ammonia concentration during food spoilage. Furthermore, polyacrylonitrile (PAN) was added to improve transport speed of ammonium ions as the matrix in the sensors and optimized the viscosity to enable successful printing. The color changed within 3 min at ammonia concentration of 300 ppb and 1 ppm, respectively. The sensor exhibited reproducibility over 10 cycles and selective exposure to various gases generated during the food spoilage process. In an experiment involving pork spoilage, the color change was significant before and after exposure to ammonia gas within 8 h in ambient conditions. The proposed sensor can be integrated in bar codes and QR codes that are easily mass produced.

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QRsens: Dual-purpose quick response code with built-in colorimetric sensors

Cited by 26 publications

References 54 publications

A QR code-integrated chromogenic paper strip for detection of hydrogen peroxide in aqueous samples

A QR code-integrated chromogenic paper strip for detection of hydrogen peroxide in aqueous samples

Communicating Supraparticles to Enable Perceptual, Information‐Providing Matter

Fabrication of Printable Colorimetric Food Sensor Based on Hydrogel for Low-Concentration Detection of Ammonia

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