Polymer-based sensors: A review

Cichosz, Stefan; Zaborski, Marian

doi:10.1016/j.polymertesting.2018.03.024

Cited by 162 publications

(106 citation statements)

References 67 publications

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“…Consequently, it is critical to detect H 2 O 2 rapidly and selectively particular at the low concentrations level. So far several methods have already been established for fast H 2 O 2 detection including colorimetric [22][23][24][25], non-enzymatic [26,27], electrochemical [28][29][30][31][32][33][34][35], chemiluminescent [36][37][38][39], and fluorometric [39,40] measurements. Although all of them demonstrated reasonable results and good repeatability, their main disadvantages include complex separation processes, time-consuming derivation and relatively high running cost.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Au-ZnO Heterostructure Developed by Atomic Layer Deposition Towards Amperometric H2O2 Detection

Wei

Verpoort

et al. 2020

Nanoscale Res Lett

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Nanoscale Au-ZnO heterostructures were fabricated on 4-in. SiO 2 /Si wafers by the atomic layer deposition (ALD) technique. Developed Au-ZnO heterostructures after post-deposition annealing at 250°C were tested for amperometric hydrogen peroxide (H 2 O 2) detection. The surface morphology and nanostructure of Au-ZnO heterostructures were examined by field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), etc. Additionally, the electrochemical behavior of Au-ZnO heterostructures towards H 2 O 2 sensing under various conditions is assessed by chronoamperometry and electrochemical impedance spectroscopy (EIS). The results showed that ALD-fabricated Au-ZnO heterostructures exhibited one of the highest sensitivities of 0.53 μA μM −1 cm −2 , the widest linear H 2 O 2 detection range of 1.0 μM-120 mM, a low limit of detection (LOD) of 0.78 μM, excellent selectivity under the normal operation conditions, and great long-term stability. Utilization of the ALD deposition method opens up a unique opportunity for the improvement of the various capabilities of the devices based on Au-ZnO heterostructures for amperometric detection of different chemicals.

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Section: Introductionmentioning

confidence: 99%

Nanoscale Au-ZnO Heterostructure Developed by Atomic Layer Deposition Towards Amperometric H2O2 Detection

Wei

Verpoort

et al. 2020

Nanoscale Res Lett

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“…These days, a wide range of compounds being developed are polymers, because of the variety of their chemical and physical properties and the possibility to be tailored towards many applications. In the last two decades, tremendous interest has been shown in polymeric materials that could reversibly or irreversibly change their physical and chemical properties under the influence of external stimuli, eg, pH, temperature, presence of specific ions, light radiation, mechanical forces, magnetic fields, electric fields, and bioactive molecules . Among them, special attention is paid to the well‐defined pH block copolymers, which at physiological pH (7.1‐7.3) self‐assemble into micellar structures and the acidification of the media lead to controlled micelle dissociation and triggered drug release.…”

Section: Introductionmentioning

confidence: 99%

Design and synthesis of fluorescent shell functionalized polymer micelles for biomedical application

Ismail

Bryaskova

Georgiev

et al. 2020

Polymers for Advanced Techs

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pH-sensitive polymers can be defined as polyelectrolytes that include in their structure weak acidic or basic groups that either accept or release protons in response to a change in the environmental pH. This work summarizes the design, synthesis, and potential applications of pH-responsive fluorescent copolymers in the biomedical field.This was achieved using atom transfer radical polymerization (ATRP) of tert-butyl acrylate using a CuBr/N,N,N 0 ,N 00 N 00 -pentamethyldiethylenetriamine catalyst system in conjunction with an alkyl bromide as the initiator. Well-defined macroinitiators based on poly(tert-butyl acrylate) with narrow molecular weight distributions were obtained by the addition of an appropriate solvent system in order to create a homogeneous catalytic system. The addition of n-butyl acrylate as a second building block in order to create well-defined poly(tert-butyl acrylate)-b-poly(n-butyl acrylate) block copolymers (PtBA-b-PnBA) followed by chemical modification of the block copolymers and functionalization with an appropriate fluorescent compound are the basis for the preparation of well-defined fluorescent pH-sensitive micelles. Thus, prepared water soluble nanosized pH-sensitive micelles consisting of hydrophobic poly(n-butyl acrylate) core and hydrophilic polyacrylic acid shell decorated with an appropriate fluorescent compound determined their potential applications of these systems in the field of biomedicine as biosensors, controlled drug delivery systems, and so on. In this respect, the cell viability and internalization of the polymer micelles were studied. K E Y W O R D S bioimaging, fluorescent nanosized micelles, personalized theranostic systems, pH-sensitive block copolymers 1 | INTRODUCTION These days, a wide range of compounds being developed are polymers, because of the variety of their chemical and physical properties and the possibility to be tailored towards many applications. In the last two decades, tremendous interest has been shown in polymeric materials that could reversibly or irreversibly change their physical and chemical properties under the influence of external stimuli, eg, pH, temperature, presence of specific ions, light radiation, mechanical forces, magnetic fields, electric fields, and bioactive molecules. 1 Among them, special attention is paid to the well-defined pH block copolymers, which at physiological pH (7.1-7.3) self-assemble into micellar structures and the acidification of the media lead to controlled micelle dissociation and triggered drug release. Several modern techniques can be applied for their synthesis as atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer (RAFT), and stable free radical polymerization (SFRP). 2 These techniques are based on a reversible activation/deactivation cycle of

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“…Even though MOS normally have higher sensitivities, CP present an attractive alternative to metal oxides due to their ability to operate at room temperature, which contributes to much lower power consumptions of the device [ 129 ]. CP are normally synthetized by chemical or electrochemical oxidation of their corresponding monomer and have conjugated

-electron systems in their structure, which make them conductive [ 130 ]. Some of the most typically CP implemented for gas sensing applications are: PANI, PEDOT, PPy, PTs, PA, and PPV.…”

Section: Gas Sensors For Vocs Detectionmentioning

confidence: 99%

Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

Ollé

Farré-Lladós

Casals‐Terré

2020

Sensors

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In recent years, advancements in micromachining techniques and nanomaterials have enabled the fabrication of highly sensitive devices for the detection of odorous species. Recent efforts done in the miniaturization of gas sensors have contributed to obtain increasingly compact and portable devices. Besides, the implementation of new nanomaterials in the active layer of these devices is helping to optimize their performance and increase their sensitivity close to humans’ olfactory system. Nonetheless, a common concern of general-purpose gas sensors is their lack of selectivity towards multiple analytes. In recent years, advancements in microfabrication techniques and microfluidics have contributed to create new microanalytical tools, which represent a very good alternative to conventional analytical devices and sensor-array systems for the selective detection of odors. Hence, this paper presents a general overview of the recent advancements in microfabricated gas sensors and microanalytical devices for the sensitive and selective detection of volatile organic compounds (VOCs). The working principle of these devices, design requirements, implementation techniques, and the key parameters to optimize their performance are evaluated in this paper. The authors of this work intend to show the potential of combining both solutions in the creation of highly compact, low-cost, and easy-to-deploy platforms for odor monitoring.

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Polymer-based sensors: A review

Cited by 162 publications

References 67 publications

Nanoscale Au-ZnO Heterostructure Developed by Atomic Layer Deposition Towards Amperometric H2O2 Detection

Nanoscale Au-ZnO Heterostructure Developed by Atomic Layer Deposition Towards Amperometric H2O2 Detection

Design and synthesis of fluorescent shell functionalized polymer micelles for biomedical application

Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

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