Polypyrrole/sulfonated multi-walled carbon nanotubes conductive hydrogel for electrochemical sensing of living cells

Yang, Ming; Ren, Xiangzhong; Yang, Taotao; Xu, Chao; Ye, Yongqin; Sun, Zhaowei; Kong, Lingqian; Wang, Bin; Luo, Zhiqiang

doi:10.1016/j.cej.2021.129483

Cited by 54 publications

(47 citation statements)

References 45 publications

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“…Conducting polymer hydrogels (CPHs) have been extensively used for the development of EC biosensors because they have a large specific surface area, good biocompatibility and 3D continuous conducting network [109][110][111][112][113][114][115][116][117]. For instance, Geleta et al developed a cost effective, environmentally friendly and disposable EC aptasensor (termed SPCE/PAM/PA/PDA/Apt) for the detection of Aflatoxin B2 (AFB2) through the immobilization of an AFB2 aptamer (Apt) on a conducting porous polyacrylamide/phytic acid/polydopamine (PAM/PA/PDA) hydrogel modified screen printed carbon electrode (SPCE) [112].…”

Section: Polymer Hydrogel-based Ec Biosensormentioning

confidence: 99%

“…The as-developed EC immunosensor exhibited a wide linear range of 10 pg mL −1 to 100 ng mL −1 , low LOD of 2.73 pg mL −1 and a highly sensitive response, with the slope value as high as 31.342, making great sense in the practical diagnosis. Yang et al developed an EC biosensor by using a conjugated polypyrrole (PPy) hydrogel with conductive sulfonated multi-walled carbon nanotubes (s-MWCNTs) as crosslinking agents [117]. Due to the integration of the advantages of PPy hydrogel and s-MWCNTs, the as-developed EC biosensor enables sensitive in situ detection of biomolecules released from living cells and real-time monitoring of cell proliferation.…”

Section: Polymer Hydrogel-based Ec Biosensormentioning

confidence: 99%

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The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

Sun

2022

Polymers

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Polymers with different structures and morphology have been extensively used to construct functionalized surfaces for a wide range of applications because the physicochemical properties of polymers can be finely adjusted by their molecular weights, polydispersity and configurations, as well as the chemical structures and natures of monomers. In particular, the specific functions of polymers can be easily achieved at post-synthesis by the attachment of different kinds of active molecules such as recognition ligand, peptides, aptamers and antibodies. In this review, the recent advances in the bioanalytical and biomedical applications of polymer modified substrates were summarized with subsections on functionalization using branched polymers, polymer brushes and polymer hydrogels. The review focuses on their applications as biosensors with excellent analytical performance and/or as nonfouling surfaces with efficient antibacterial activity. Finally, we discuss the perspectives and future directions of polymer modified substrates in the development of biodevices for the diagnosis, treatment and prevention of diseases.

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Section: Polymer Hydrogel-based Ec Biosensormentioning

confidence: 99%

Section: Polymer Hydrogel-based Ec Biosensormentioning

confidence: 99%

The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

Sun

2022

Polymers

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“…At the same time, the sensor has a faster response time to SO 2 , and the response time to 150 ppm and 1 ppm SO 2 are 435 s and 185 s, respectively. This is mainly ascribed that electrospun nanofibers with the high porosity is in favor of fast gas diffusion, [31,32] moreover, rich pores and voids of UiO-66-NH 2 can capture and adsorb SO 2 gas molecules immediately. In consequence, the sensor also has an excellent sensing effect on low concentrations of SO 2 .…”

Section: The Performance Evaluation Of Sensormentioning

confidence: 99%

“…[30] Additionally, the CNT guarantees breathability, flexibility as well as electric conductivity at the same time. [31,32] Figure S3 shows the SEM images of PVDF NM/CNT. Delightfully, the prepared capacitive sensor can detect SO 2 in large ppm range from 1 ppm to 150 ppm with a linear response (R 2 = 0.994) at ambient condition.…”

Section: Introductionmentioning

confidence: 99%

Zr‐MOF Combined with Nanofibers as an Efficient and Flexible Capacitive Sensor for Detecting SO₂

et al. 2021

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The fabrication of gas sensors with flexible properties and sensitive performances is of great importance for improving wearable sensing electronics. Herein, we coated a metal-organic framework (UiO-66-NH 2 ) on flexible electrospun polyvinylidenefluoride (PVDF) nanofibers as sensing layer for real-time monitoring of toxic SO 2 at room temperature. The developed capacitive sensor possesses a great bending flexibility, excellent cycling stability, high detection sensitivity, light weight as well as portable ability. The fabricated sensor possesses a short response time with 435 s and 185 s towards 150 ppm and 1 ppm, respectively. Importantly, the flexible sensor still maintained outstanding sensing behavior with the retention value of 98.4% in the detection of SO 2 at 10 ppm after bending 2000 times. In addition, significant cycling performance was desirably achieved, and the response value of the sensor was also kept at about 88.7% towards 50 ppm SO 2 , compared with original sensor after 20 days. This strategy can provide promising applications for the development of wearable devices for the detection of harmful gases.

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“…As such, the power conversion efficiency of devices fabricated from the composite gel was around six times higher than that of devices from the same solutions without gelation [22]. Recently, the conductive composite gels consisting of polypyrrole and carbon nanotubes were reported by solution mixing of polypyrrole and carbon nanotubes to form interconnected porous networks [26]. The resulting polypyrrole/nanotube nanocomposite gels demonstrated very high conductivity and biocompatibility, and they were further fabricated into the soft biosensors displaying excellent electrochemical sensing of living cells.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Gelation of Conductive Polymer Nanocomposites Consisting of Poly(3-hexylthiophene) and ZnO Nanowires

et al. 2021

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The sol–gel transition of conductive nanocomposites consisting of poly(3-hexylthiophene) (P3HT) and ZnO nanowires in o-dichlorobenzene (o-DCB) has been investigated rheologically. The physical gelation of P3HT in o-DCB spontaneously occurs upon adding the small amount of ZnO nanowires. The rheological properties of the P3HT/ZnO nanocomposite gels have been systematically studied by varying factors such as polymer concentration, nanowire loading, and temperature. The nanocomposite gel exhibits shear-thinning in the low shear rate range and shear-thickening in the high shear rate range. The elastic storage modulus of the nanocomposite gel gradually increases with gelation time and is consistently independent of frequency at all investigated ranges. The isothermal gelation kinetics has been analyzed by monitoring the storage modulus with gelation time, and the data are well fitted with a first-order rate law. The structural analysis data reveal that the polymer forms the crystalline layer coated on ZnO nanowires. A fringed micelle model is proposed to explain the possible gelation mechanism.

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Polypyrrole/sulfonated multi-walled carbon nanotubes conductive hydrogel for electrochemical sensing of living cells

Cited by 54 publications

References 45 publications

The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

Zr‐MOF Combined with Nanofibers as an Efficient and Flexible Capacitive Sensor for Detecting SO₂

Dynamic Gelation of Conductive Polymer Nanocomposites Consisting of Poly(3-hexylthiophene) and ZnO Nanowires

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Polypyrrole/sulfonated multi-walled carbon nanotubes conductive hydrogel for electrochemical sensing of living cells

Cited by 54 publications

References 45 publications

The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

The Bioanalytical and Biomedical Applications of Polymer Modified Substrates

Zr‐MOF Combined with Nanofibers as an Efficient and Flexible Capacitive Sensor for Detecting SO2

Dynamic Gelation of Conductive Polymer Nanocomposites Consisting of Poly(3-hexylthiophene) and ZnO Nanowires

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Product

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Zr‐MOF Combined with Nanofibers as an Efficient and Flexible Capacitive Sensor for Detecting SO₂