Polyaniline Nanoskein: Synthetic Method, Characterization, and Redox Sensing

Hong, Yoochan; Kim, Hyun Soo; Lee, Taeha; Lee, Gyudo; Kwon, Ohwon

doi:10.1186/s11671-020-03446-2

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…14,15 Generally, chromogenic compounds and color indicators are used in colorimetric sensors, but the application is restricted by toxicity and limited usage to a specic pH range. [16][17][18] The plasmonic properties of silver nanoparticles (AgNPs) result in a characteristic color that is sensitive to the size and environment, which is ideal for the colorimetric detection of H 2 O 2 . 20 Due to their intense surface plasma resonance (SPR) bands, AgNPs provide great sensitivity and superior selectivity as sensing agents.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of silver nanoparticles as a colorimetric sensor for hydrogen peroxide

Ismillayli,

Suprapto,

Santoso

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of silver nanoparticles as a colorimetric sensor for hydrogen peroxide

Ismillayli,

Suprapto,

Santoso

et al. 2024

RSC Adv.

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“…To fulfill these criteria, it is essential to fabricate a CPS by using appropriate materials. Polyaniline (PAni) is a material that has recently gained attention as one of the electroactive polymers due to its unique properties, including electrical, optical, and environmental stability. , PAni has numerous applications, especially in sensor technology. − One primary reason is its redox properties, which lead to color changes during electrochemical reactions . Specifically, PAni nanoparticles (NPs) exhibit distinct color changes when exposed to various pH levels.…”

Section: Introductionmentioning

confidence: 99%

Glucose Oxidase Activity Colorimetric Assay Using Redox-Sensitive Electrochromic Nanoparticle-Functionalized Paper Sensors

Lee,

Park,

et al. 2024

ACS Omega

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Glucose oxidase (GOx) activity assays are vital for various applications, including glucose metabolism estimation and fungal testing. However, conventional methods involve time-consuming and complex procedures. In this study, we present a colorimetric platform for in situ GOx activity measurement utilizing redox-sensitive electrochromic nanoparticles based on polyaniline (PAni). The glucose-adsorbed colorimetric paper sensor, herein termed Glu@CPS, is created by immobilizing ferrocene and glucose onto paper substrates that have been functionalized with PAni nanoparticles. Glu@CPS not only demonstrated rapid detection (within 5 min) but also exhibited remarkable selectivity for GOx and a limit of detection as low as 1.25 μM. Moreover, Glu@CPS demonstrated consistent accuracy in the measurement of GOx activity, exhibiting no deviations even after being stored at ambient temperature for a duration of one month. To further corroborate the effectiveness of this method, we applied Glu@CPS in the detection of GOx activity in a moldy red wine. The results highlight the promising potential of Glu@CPS as a convenient and precise platform for GOx activity measurement in diverse applications including food quality control, environmental monitoring, and early detection of fungal contamination.

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“…Although PAni-NPs have a green color at low pH, they exhibit a blue color at higher pH [ 20 ]. Based on this unique colorimetric response, PAni-NPs have been widely used to monitor changes in the pH of the surrounding environment [ 21 , 22 , 23 , 24 , 25 ]. In addition, it serves as a suitable matrix for biomolecular immobilization and promotes electron transport during redox reactions [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Nanoparticle-Embedded Hydrogels for a Biosensing Platform

Lee

Kim

et al. 2022

Nanomaterials

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Hydrogels containing colorimetric nanoparticles have been used for ion sensing, glucose detection, and microbial metabolite analyses. In particular, the rapid chemical reaction owing to both the hydrogel form of water retention and the sensitive color change of nanoparticles enables the rapid detection of target substances. Despite this advantage, the poor dispersibility of nanoparticles and the mechanical strength of nanoparticle–hydrogel complexes have limited their application. In this study, we demonstrate a milliliter agarose gel containing homogeneously synthesized polyaniline nanoparticles (PAni-NPs), referred to as PAni-NP–hydrogel complexes (PNHCs). To fabricate the optimal PNHC, we tested various pH solvents based on distilled water and phosphate-buffered saline and studied the colorimetric response of the PNHC with thickness. The colorimetric response of the prepared PNHC to the changes in the pH of the solution demonstrated excellent linearity, suggesting the possibility of using PNHC as a pH sensor. In addition, it was verified that the PNHC could detect minute pH changes caused by the cancer cell metabolites without cytotoxicity. Furthermore, the PNHC can be stably maintained outside water for approximately 12 h without deformation, indicating that it can be used as a disposable patch-type wearable biosensing platform.

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Polyaniline Nanoskein: Synthetic Method, Characterization, and Redox Sensing

Cited by 7 publications

References 35 publications

Microwave-assisted synthesis of silver nanoparticles as a colorimetric sensor for hydrogen peroxide

Microwave-assisted synthesis of silver nanoparticles as a colorimetric sensor for hydrogen peroxide

Glucose Oxidase Activity Colorimetric Assay Using Redox-Sensitive Electrochromic Nanoparticle-Functionalized Paper Sensors

Colorimetric Nanoparticle-Embedded Hydrogels for a Biosensing Platform

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