Biocompatible laponite ionogels based non-enzymatic oxalic acid sensor

Joshi, Nidhi; Rawat, Kamla; Solanki, Pratima R.; Bohidar, H. B.

doi:10.1016/j.sbsr.2015.08.001

Cited by 23 publications

(8 citation statements)

References 39 publications

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“…Non‐enzymatic, biocompatible laponite ionogels as an oxalic acid sensor has also been reported by Joshi et al. . Overall, we can see different approaches used in studying the electrochemical oxidation characteristics of OA.…”

Section: Introductionsupporting

confidence: 62%

Non‐enzymatic Electrochemical Oxidation Based on AuNP/PPy/rGO Nanohybrid Modified Glassy Carbon Electrode as a Sensing Platform for Oxalic Acid

et al. 2016

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1IntroductionThere has been am assive growth in the biosensor related research in the pastf ew years.I ti sp articularlyd ue to the ease for quantificationo fb iochemical processb yt he means of generated signals.N on-enzymatics ensors have attracted ag reat deal of attention due to its features such as good stability,r epeatability and sensitivity when compared to that of enzymatic sensors [1][2].S uch sensors have many practicala pplications in the clinicald iagnosis, environmental monitoring and in the food industries as well. But, the thing to be noted is that non-enzymatic sensors exclusively depend upon the electrochemical activity of transition metals and hence there may be the possibility of electrodep oisoning. Thus,t he fabrication of non-enzymatics ensor with improved performance should always be prioritized. Besides electrochemical analysis,o ther analyticalm ethodsh ave also been widely used. Chromatography [3],l iquid chromatography [4],s pectroscopy [5,6] are some of the widely used methodsf or accurate determination of oxalic acid or oxalate species content. But, the major pitfalls of sucha nalysis techniques includer elatively high cost, low sensitivitya nd inadequate selectivity when comparedt othe electrochemical sensors. [ 7].Oxalic acid (OA) is an organic compound and acts as ar educing agent. It is the end product of metabolism in an umber of plant tissues.I ft hese plantsa re eaten beyond certainl imit, it may possess an adverse effecta s oxalates bind with calcium and other minerals and hence leads to the deficiency of those important minerals which are required in the human body system. OA is normal end product of mammalian metabolism but if it gets accumulatedi nl argerq uantity then it may cause stone formation in the urinary tract [8][9][10].O xidation of phenol and its derivative which is one of the major contaminants present in waste water from industries,a lso leads to the accumulation of OA.T his compound is also knownt ob e recalcitrantt od ifferent biological and chemical treatments [11][12]. Ethylene glycol electrooxidationr eaction also leads to the formation of OA as an intermediate product [13].H ence,i ts electrocatalytic oxidation has gained quite an attention in the fields of electrochemical sensor for variousp urposes such as in the formulationo f well-balanced diet, managemento ff ood qualities [ 14] and also in ethyleneg lycol fuelc ells [13].It is well-known that gold nanoparticles (AuNPs) are ag ood electro-catalytic material and widely used in vari-Abstract:I nt his study, ananohybrid of gold nanoparticle, polypyrrole,a nd reduced graphene oxide (AuNP/PPy/ rGO) was preparedb ya ni n-situ chemical synthesisa pproach.T he as-preparedn anohybrid has been applied for non-enzymatice lectrochemical detection of oxalic acid (OA). Then anohybrid nanocomposite material( AuNP/ PPy/rGO) was characterized by field emissions canning electronm icroscopy (FE-SEM), X-ray diffraction( XRD), Fourier transform infrared (FT-IR) spectroscopya nd cyclic voltammetry (CV), and further emplo...

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Section: Introductionsupporting

confidence: 62%

Non‐enzymatic Electrochemical Oxidation Based on AuNP/PPy/rGO Nanohybrid Modified Glassy Carbon Electrode as a Sensing Platform for Oxalic Acid

et al. 2016

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“…Ionic liquid gels, known as ionogels or iongels are a new generation of soft-ionic materials employed in several applications such as bioelectronics, [3] sensors, [4] energy, [5] and gas separation. [6] Particularly for bioelectronics, tailored iongels Soft-ionic materials with biocompatibility and 3D printability are needed to develop next-generation devices to interface between electronic and biological signals.…”

Section: Introductionmentioning

confidence: 99%

3D Printable and Biocompatible Iongels for Body Sensor Applications

Luque

Picchio

Martins

et al. 2021

Adv Elect Materials

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Soft‐ionic materials with biocompatibility and 3D printability are needed to develop next‐generation devices to interface between electronic and biological signals. Herein, thermoreversible and biocompatible ionic liquid gels or iongels, which can be processed by direct ink writing are reported. The iongels are designed by taking advantage of polyvinyl alcohol/phenol interactions to gelify biocompatible cholinium carboxylate ionic liquids. The obtained iongels are stable, soft, and flexible materials (Young modulus between 14 and 70 kPa) with high ionic conductivity (1.8 × 10–2 S cm–1). Interestingly, they presented thermoreversible properties with gel–sol transitions ranging from 85 and 110 °C, which allows the iongel processing via direct ink writing 3D printing by material extrusion at temperatures over its transition. These 3D printable iongels are integrated into a variety of body sensors applications, namely pressure sensors, motion sensors and electrodes for electrophysiological recordings. The iongels are used as pressure sensors with a sensitivity of 0.1 kPa–1, ten times higher than that of others similar materials reported so far; showing its ability to detect human motion. Furthermore, the iongels showed excellent performance in electrodes for electrocardiography (ECG) recording, presenting good stability over time with electrocardiographic waves maintained their typical shape even after weeks.

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“…Ionogels are widely used in applications such as drug carriers [ 8 ], lithium batteries [ 9 ], fuel cells [ 10 ], solar cells [ 11 ], sensors [ 12 , 13 ], catalysts [ 14 , 15 ], and as active layers in chemiresistive gas sensors and electronic noses (e-noses) [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Ionogels Based on a Single Ionic Liquid for Electronic Nose Application

et al. 2021

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Ionogel are versatile materials, as they present the electrical properties of ionic liquids and also dimensional stability, since they are trapped in a solid matrix, allowing application in electronic devices such as gas sensors and electronic noses. In this work, ionogels were designed to act as a sensitive layer for the detection of volatiles in a custom-made electronic nose. Ionogels composed of gelatin and a single imidazolium ionic liquid were doped with bare and functionalized iron oxide nanoparticles, producing ionogels with adjustable target selectivity. After exposing an array of four ionogels to 12 distinct volatile organic compounds, the collected signals were analyzed by principal component analysis (PCA) and by several supervised classification methods, in order to assess the ability of the electronic nose to distinguish different volatiles, which showed accuracy above 98%.

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Biocompatible laponite ionogels based non-enzymatic oxalic acid sensor

Cited by 23 publications

References 39 publications

Non‐enzymatic Electrochemical Oxidation Based on AuNP/PPy/rGO Nanohybrid Modified Glassy Carbon Electrode as a Sensing Platform for Oxalic Acid

Non‐enzymatic Electrochemical Oxidation Based on AuNP/PPy/rGO Nanohybrid Modified Glassy Carbon Electrode as a Sensing Platform for Oxalic Acid

3D Printable and Biocompatible Iongels for Body Sensor Applications

Ionogels Based on a Single Ionic Liquid for Electronic Nose Application

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