A hydrogel based fluorescent micro array used for the characterization of liquid analytes

Thete, Aniket R.; Henkel, Thomas; Göckeritz, Robert; Endlich, M.; Köhler, J. Michael; Groß, G. Alexander

doi:10.1016/j.aca.2008.11.030

Cited by 25 publications

(14 citation statements)

References 26 publications

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“…However, some drawbacks such as sensor preparation, durability, and signal interferences limit their application [12,13]. Optical e-tongues have been mainly used in biomedical analysis and few applications can be found in the literature devoted to food analysis [34,35].…”

Section: Description and Structure Of An E-tonguementioning

confidence: 99%

Review: Highlights in recent applications of electronic tongues in food analysis

Escuder-Gilabert

Peris

2010

Analytica Chimica Acta

281

134

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Section: Description and Structure Of An E-tonguementioning

confidence: 99%

Review: Highlights in recent applications of electronic tongues in food analysis

Escuder-Gilabert

Peris

2010

Analytica Chimica Acta

281

134

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“…Thete et al prepared a fluorescent microsensor array which could be used for rapid identification and characterization of different complex liquids, e.g. for the determination of ethanol content in water . Wang and Han created an inverse opal heterostructure hydrogel by colloidal crystal templating.…”

Section: Introductionmentioning

confidence: 99%

“…for the determination of ethanol content in water. 30 Wang and Han created an inverse opal heterostructure hydrogel by colloidal crystal templating. The hydrogel changed colour when the composition of the mixed (ethanol and water) solvent changed.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional sensors based on silicone hydrogel and their responses to solvents, pH and solution composition

Zhao

et al. 2016

Polymer International

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In this paper, multicomponent silicone hydrogels were prepared by the copolymerization of the hydrophobic silicon‐containing monomer bis(trimethylsilyloxy) methylsilylpropyl glycerol methacrylate with two hydrophilic monomers 2‐hydroxyethyl methacrylate and N‐vinyl pyrrolidone. The response of the silicone hydrogels to different stimuli was evaluated by observing the swelling ratios of the hydrogels. The results show that the hydrogels display different responses to variations in pH and solvent. Multifunctional sensors were then prepared based on the silicone hydrogels to detect the pH value of solutions, the types of solvent and the ethanol percentage in water. The results could be obtained by visual inspection and the sensors were reusable. © 2016 Society of Chemical Industry

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“…To date, several studies have been performed using electronic tongues. For example, in 2009, Thete et al proposed a fluorometric micro spot array, also called an optochemical tongue, for recognizing different alcoholic beverages [ 22 ]. Their taste micro spot was composed of binary mixtures of different fluorescence dyes that were embedded in a hydrogel matrix.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Multi-Channel IDC Sensor Array for Low Concentration Taste Detection

Khan

Kang

2015

Sensors

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In this study, we designed and developed an interdigitated capacitor (IDC)-based taste sensor array to detect different taste substances. The designed taste sensing array has four IDC sensing elements. The four IDC taste sensing elements of the array are fabricated by incorporating four different types of lipids into the polymer, dioctyl phenylphosphonate (DOPP) and tetrahydrofuran (THF) to make the respective dielectric materials that are individually placed onto an interdigitated electrode (IDE) via spin coating. When the dielectric material of an IDC sensing element comes into contact with a taste substance, its dielectric properties change with the capacitance of the IDC sensing element; this, in turn, changes the voltage across the IDC, as well as the output voltage of each channel of the system. In order to assess the effectiveness of the sensing system, four taste substances, namely sourness (HCl), saltiness (NaCl), sweetness (glucose) and bitterness (quinine-HCl), were tested. The IDC taste sensor array had rapid response and recovery times of about 12.9 s and 13.39 s, respectively, with highly stable response properties. The response property of the proposed IDC taste sensor array was linear, and its correlation coefficient R2 was about 0.9958 over the dynamic range of the taste sensor array as the taste substance concentration was varied from 1 μM to 1 M. The proposed IDC taste sensor array has several other advantages, such as real-time monitoring capabilities, high sensitivity 45.78 mV/decade, good reproducibility with a standard deviation of about 0.029 and compactness, and the circuitry is based on readily available and inexpensive electronic components. The proposed IDC taste sensor array was compared with the potentiometric taste sensor with respect to sensitivity, dynamic range width, linearity and response time. We found that the proposed IDC sensor array has better performance. Finally, principal component analysis (PCA) was applied to discriminate different types of taste of the mixed taste substances.

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A hydrogel based fluorescent micro array used for the characterization of liquid analytes

Cited by 25 publications

References 26 publications

Review: Highlights in recent applications of electronic tongues in food analysis

Review: Highlights in recent applications of electronic tongues in food analysis

Multifunctional sensors based on silicone hydrogel and their responses to solvents, pH and solution composition

Highly Sensitive Multi-Channel IDC Sensor Array for Low Concentration Taste Detection

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