Layer-by-layer composite film of nickel phthalocyanine and montmorillonite clay for synergistic effect on electrochemical detection of dopamine

Lucena, Nathalia C. de; Miyazaki, Celina M.; Shimizu, Flávio M.; Constantino, Carlos J. L.

doi:10.1016/j.apsusc.2017.12.117

Cited by 41 publications

(20 citation statements)

References 56 publications

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“…LbL films have also been applied for diagnosis in medical and pharmaceutical areas. In 2018, de Lucena et al tested composite LbL films on the electrochemical detection of dopamine in the presence of natural interferents such as ascorbic acid and uric acid [13]. The limit of detection (LOD) obtained was consistent with those found in the literature for other LbL architectures, with a higher range of detection (5-150 μmol L −1 ).…”

Section: Introductionsupporting

confidence: 60%

Multilayered Nanostructures Integrated with Emerging Technologies

Braunger¹,

Hensel²,

Gaál³

et al. 2020

Multilayer Thin Films - Versatile Applications for Materials Engineering

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Surface and interface functionalization are crucial steps to introduce new functionalities in numerous applications, as faster dynamics occur on surfaces rather than bulk. Within this context, the layer-by-layer (LbL) technique is a versatile methodology to controllably form organized nanostructures from the spontaneous adsorption of charged molecules. It enables the assembly of multilayered LbL films on virtually any surface using non-covalent molecular interactions, allowing the nanoengineering of interfaces and creation of multifunctional systems with distinct building blocks (polymers, clays, metal nanoparticles, enzymes, organic macromolecules, etc.). Several applications require thin films on electrodes for sensing/ biosensing, and here we explore LbL films deposited on interdigitated electrodes (IDEs) that were 3D-printed using the fusing deposition modeling (FDM) technique. IDEs covered with LbL films can be used to form multisensory systems employed in the analysis of complex liquids transforming raw data into specific patterns easily recognized by computational and statistical methods. We extend the FDM 3D-printing methodology to simplify the manufacturing of electrodes and microchannels, thus integrating an e-tongue system in a microfluidic device. Moreover, the continuous flow within microchannels contributes to faster and more accurate analysis, reducing the amount of sample, waste, and costs.

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Section: Introductionsupporting

confidence: 60%

Multilayered Nanostructures Integrated with Emerging Technologies

Braunger¹,

Hensel²,

Gaál³

et al. 2020

Multilayer Thin Films - Versatile Applications for Materials Engineering

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“…Additional data are shown in Figures S10 and S11 in the Supplementary Information. The LOD was calculated similarly to recent literature [37][38][39][40][41] as LOD = (3 × σ)/b, where σ is the standard deviation, and b is the slope of the calibration curve (linear fit). Figure 5.…”

Section: Resultsmentioning

confidence: 99%

3D-Printed Graphene Electrodes Applied in an Impedimetric Electronic Tongue for Soil Analysis

et al. 2019

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The increasing world population leads to the growing demand for food production without expanding cultivation areas. In this sense, precision agriculture optimizes the production and input usage by employing sensors to locally monitor plant nutrient within agricultural fields. Here, we have used an electronic tongue sensing device based on impedance spectroscopy to recognize distinct soil samples (sandy and clayey) enriched with macronutrients. The e-tongue setup consisted of an array of four sensing units formed by layer-by-layer (LbL) films deposited onto 3D-printed graphene-based interdigitated electrodes (IDEs). The IDEs were fabricated in 20 min using the fused deposition modeling process and commercial polylactic acid-based graphene filaments. The e-tongue comprised one bare and three IDEs functionalized with poly(diallyldimethylammonium chloride) solution/copper phthalocyanine-3,4 ,4 ,4 -tetrasulfonic acid tetrasodium salt (PDDA/CuTsPc), PDDA/montmorillonite clay (MMt-K), and PDDA/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) LbL films. Control samples of sandy and clayey soils were enriched with different concentrations of nitrogen (N), phosphorus (P), and potassium (K) macronutrients. Sixteen soil samples were simply diluted in water and measured using electrical impedance spectroscopy, with data analyzed by principal component analysis. All soil samples were easily distinguished without pre-treatment, indicating the suitability of 3D-printed electrodes in e-tongue analysis to distinguish the chemical fertility of soil samples. Our results encourage further investigations into the development of new tools to support precision agriculture.

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“…Phthalocyanines have been widely used as sensing materials in electrochemical sensors due to their chemical reactivity, their excellent electrocatalytic properties, as well as the capability to form LbL nanostructured films [ 11 , 16 ]. The LbL technique can be used to combine the water soluble anionic metal tetrasulfonated phthalocyanines (MPc S ) with other cationic materials, to obtain hybrid layers with improved catalytic properties [ 17 ]. One of the drawbacks of phthalocyanines is their low conductivity.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of Milks with a Multisensor System Based on Layer-by-Layer Films

Salvo-Comino

García-Hernández

Garcı́a

et al. 2018

Sensors

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A nanostructured electrochemical bi-sensor system for the analysis of milks has been developed using the layer-by-layer technique. The non-enzymatic sensor [CHI+IL/CuPcS]2, is a layered material containing a negative film of the anionic sulfonated copper phthalocyanine (CuPcS) acting as electrocatalytic material, and a cationic layer containing a mixture of an ionic liquid (IL) (1-butyl-3-methylimidazolium tetrafluoroborate) that enhances the conductivity, and chitosan (CHI), that facilitates the enzyme immobilization. The biosensor ([CHI+IL/CuPcS]2-GAO) results from the immobilization of galactose oxidase on the top of the LbL layers. FTIR, UV–vis, and AFM have confirmed the proposed structure and cyclic voltammetry has demonstrated the amplification caused by the combination of materials in the film. Sensors have been combined to form an electronic tongue for milk analysis. Principal component analysis has revealed the ability of the sensor system to discriminate between milk samples with different lactose content. Using a PLS-1 calibration models, correlations have been found between the voltammetric signals and chemical parameters measured by classical methods. PLS-1 models provide excellent correlations with lactose content. Additional information about other components, such as fats, proteins, and acidity, can also be obtained. The method developed is simple, and the short response time permits its use in assaying milk samples online.

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Layer-by-layer composite film of nickel phthalocyanine and montmorillonite clay for synergistic effect on electrochemical detection of dopamine

Cited by 41 publications

References 56 publications

Multilayered Nanostructures Integrated with Emerging Technologies

Multilayered Nanostructures Integrated with Emerging Technologies

3D-Printed Graphene Electrodes Applied in an Impedimetric Electronic Tongue for Soil Analysis

Discrimination of Milks with a Multisensor System Based on Layer-by-Layer Films

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