A polyaniline/polyvinyl acetate composite film electrode for highly sensitive electrochemical sensing of pH

Kang, Qi; Takehara, Hiroaki; Ichikı, Takanori

doi:10.1016/j.synthmet.2023.117380

Cited by 13 publications

(2 citation statements)

References 55 publications

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“…Su et al fabricated an electrochemical pH sensor utilizing graphene and PANI composite film and reported a sensitivity of 51 mV pH −1 in the wide pH range of 1.0–11.0 21 . In comparison, our previous study using a PANI and polyvinyl acetate (PVAc) composite film as the pH‐sensing material achieved a high pH sensitivity of 100 mV pH −1 in the pH range of 3.0–8.0 22 . Therefore, PANI/PVAc films have proven to be good choices for pH sensing.…”

Section: Introductionmentioning

confidence: 79%

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Effect of pH on the properties of protonated polyaniline‐based films for pH sensing applications

Kang,

Takehara,

Ichiki

2024

J of Applied Polymer Sci

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The chemical and physical properties of protonated polyaniline (PANI)‐based films, including PANI‐emeraldine salt (ES) and PANI/polyvinyl acetate (PVAc) films, before and after pH treatments are characterized and compared. Protonated PANI‐based films are prepared by spin coating. The effects of pH value and immersion time on the film properties are investigated to gain a better understanding of their performance in pH sensing. The films are characterized based on color, morphology, chemical structure, phase state, and protonation state. Protonated PANI‐based films exhibit a color change from green to dark blue as deprotonation occurs in solutions with higher pH. The highly porous structure of PANI/PVAc films is slightly affected by the pH of the solution. However, the globular structure of the PANI‐ES films forms cracks with increasing immersion time. PANI/PVAc films exhibit better stability in acidic and neutral solutions than in alkaline solutions because of the hydrolysis of PVAc. Compared with the negligible differences in the PANI/PVAc film in buffers with different pH, PANI‐ES exhibits noticeable changes. Therefore, PVAc improves the stability and performance of PANI for pH‐sensing applications.

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Section: Introductionmentioning

confidence: 79%

“…These films were used as pH‐sensing electrodes. pH sensitivities of these electrodes were tested in our previous studies, in which PANI‐ES exhibited a pH sensitivity of 65 mV pH −1 and PANI/PVAc achieved a significantly higher pH sensitivity of 100 mV pH −1 22 …”

Section: Experimental/methodsmentioning

confidence: 99%

Effect of pH on the properties of protonated polyaniline‐based films for pH sensing applications

Kang,

Takehara,

Ichiki

2024

J of Applied Polymer Sci

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Extended Gate Transistor‐based Multi‐biomarker Sensing Platform for Real‐time Urine Analysis

Panigrahi,

Zheng,

Wang

et al. 2024

Adv Materials Technologies

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Urine analysis stands as a critical diagnostic tool, offering insights into health and disease. However, current techniques demand sophisticated equipment or significant sample processing for urine examination, reducing their suitability for regular point‐of‐care assessments. This study introduces a novel multi‐component sensing platform to address these constraints. The proposed sensor array can detect sodium (Na+), potassium (K+), ammonium (NH4+), calcium (Ca++), chloride (Cl−), and pH levels, thus, enabling real‐time urine analysis. This sensing platform utilizes an extended gate (EG)‐field effect transistor (FET) design employing EG electrodes made of LASER engraved graphene on flexible Kapton substrates. These experimental findings from individual sensors demonstrate consistent linear responses to ion levels, discrimination of specific ions among interferences, and operational stability over time. Additionally, the six‐channel sensor array exhibits notable sensitivity and selectivity in a urine environment, effectively discerning various ions and pH, illustrating its efficacy for urine analysis and validating its potential for reliable point‐of‐care diagnostics.

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Advancements in Molecularly Imprinted Polymer-Based Electrochemical Sensors: Fabrication, Functionalization, Applications, and Future Perspectives

Maheshwari,

Kaur,

Kaur

et al. 2024

Molecularly Imprinted Polymers: Path to Artificial Antibodies

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A polyaniline/polyvinyl acetate composite film electrode for highly sensitive electrochemical sensing of pH

Cited by 13 publications

References 55 publications

Effect of pH on the properties of protonated polyaniline‐based films for pH sensing applications

Effect of pH on the properties of protonated polyaniline‐based films for pH sensing applications

Extended Gate Transistor‐based Multi‐biomarker Sensing Platform for Real‐time Urine Analysis

Advancements in Molecularly Imprinted Polymer-Based Electrochemical Sensors: Fabrication, Functionalization, Applications, and Future Perspectives

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