Processable and nanofibrous polyaniline:polystyrene-sulphonate (nano-PANI:PSS) for the fabrication of catalyst-free ammonium sensors and enzyme-coupled urea biosensors

Uzunçar, Sinan; Meng, Lingyin; Turner, Anthony P. F.; Mak, Wing Cheung

doi:10.1016/j.bios.2020.112725

Cited by 42 publications

(21 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the development of modern technology, complex and optimized soft structures with synergistic properties have been developed to improve the sensitivity and selectivity of existing biosensors [ 146 ]. Polymers such as polyaniline (PANI), polypyrrole, and transition metal oxides have been widely used in biosensors due to their good electrical conductivity, ease of compounding with other functional materials, and low cost [ 60 , 147 , 148 , 149 ]. In addition, they can further enhance electrochemical signals by accelerating electron conductivity [ 91 ].…”

Section: Commonly Used Signal Amplification Strategies For Electroche...mentioning

confidence: 99%

Electrochemical Signal Amplification Strategies and Their Use in Olfactory and Taste Evaluation

Wang

Liu

et al. 2022

Biosensors

View full text Add to dashboard Cite

Biosensors are powerful analytical tools used to identify and detect target molecules. Electrochemical biosensors, which combine biosensing with electrochemical analysis techniques, are efficient analytical instruments that translate concentration signals into electrical signals, enabling the quantitative and qualitative analysis of target molecules. Electrochemical biosensors have been widely used in various fields of detection and analysis due to their high sensitivity, superior selectivity, quick reaction time, and inexpensive cost. However, the signal changes caused by interactions between a biological probe and a target molecule are very weak and difficult to capture directly by using detection instruments. Therefore, various signal amplification strategies have been proposed and developed to increase the accuracy and sensitivity of detection systems. This review serves as a reference for biosensor and detector research, as it introduces the research progress of electrochemical signal amplification strategies in olfactory and taste evaluation. It also discusses the latest signal amplification strategies currently being employed in electrochemical biosensors for nanomaterial development, enzyme labeling, and nucleic acid amplification techniques, and highlights the most recent work in using cell tissues as biosensitive elements.

show abstract

Section: Commonly Used Signal Amplification Strategies For Electroche...mentioning

confidence: 99%

Electrochemical Signal Amplification Strategies and Their Use in Olfactory and Taste Evaluation

Wang

Liu

et al. 2022

Biosensors

View full text Add to dashboard Cite

show abstract

“…8−13 Current research has revealed its functionalities by fabricating diverse morphologies, composites, colloids, and hydrogels. 14−17 Different PANI nanostructures have been used in numerous fields, extending from adsorbents, 18−20 chemical sensors, 21−23 biosensors, 24,25 electrocatalysis, 26,27 and supercapacitors to electrode materials for batteries. 28−33 Among PANI nanostructures, the development of PANIs with a high aspect ratio (the ratio is greater than 10) has received extensive attention due to the advantages of onedimensional (1D) morphology in various devices.…”

Section: Introductionmentioning

confidence: 99%

“…Conductive polymers are attractive materials due to their various functions, from insulators to conductors, while retaining traditional polymers’ mechanical properties and processing qualities. − Polyaniline (PANI) is one of the most promising conductive polymers due to its unique physical and electrochemical properties. − Current research has revealed its functionalities by fabricating diverse morphologies, composites, colloids, and hydrogels. − Different PANI nanostructures have been used in numerous fields, extending from adsorbents, − chemical sensors, − biosensors, , electrocatalysis, , and supercapacitors to electrode materials for batteries. − …”

Section: Introductionmentioning

confidence: 99%

Highly Conductive and Dispersible Polyaniline Microtubes Controlled by Methyl Orange

Cao

Cai

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Polyaniline (PANI) is one of the best-known conductive polymers that has been widely studied due to its ease of synthesis, low cost, and tunable conductivity. However, it is still challenging to synthesize dispersible and highly electroconductive PANIs with high aspect ratios. This research provides a facile onestep synthetic method assisted by an organic dye, methyl orange (MO), to obtain high aspect ratios (the ratio could reach 20) in PANI structures. The presence of MO contributes to microtubes' morphology, enhancing their electrical conductivity from 0.5 to 4.6 S cm −1 , which is 8 times that of spherical PANI nanoparticles. The electrical properties and processability of the PANI microtubes were well explored simultaneously. The PANI microtubes can reach high conductive levels and maintain stable electrical performance for over 30 days. In addition, the PANI microtubes could be dispersed in a wide range of organic solvents and water. These functionalities enable them to act as conductive fillers to be effectively combined with silver flakes in thermoplastic polyurethane resins for fabricating conductive composites. Adding the PANI microtubes combined with silver flakes as conductive fillers in polyurethane, the resistivity of the composites can decrease to 1/1900 of those filled only with the same mass ratio of silver flakes, showing their great potential in reinforcing resins.

show abstract

“…Organic micro/nanocrystals have been demonstrated as brilliant building-blocks for the miniaturized devices [1][2][3], electrochemical sensors [4][5][6][7], organic light-emitting diodes (OLEDs) [8,9], solar cells [10,11], and organic field-effect transistors [12,13], and thus have drawn enormous attention from researchers [14]. Compared with the inorganic materials, which occupy strong market positions and accessibility to the manufacturing infrastructure, the organic counterparts play a unique role due to the broad spectral tunability, high optical crosssections as well as low-cost solution processing [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Advances in organic micro/nanocrystals with tunable physicochemical properties

Chen

et al. 2021

Sci. China Mater.

View full text Add to dashboard Cite

Organic micro/nanocrystals based on small organic molecules have drawn extensive attention due to their potential application in organic field-effect transistors, electrochemical sensors, solar cells, etc. Herein, the recent advances for organic micro/nanocrystals from the perspective of molecule aggregation mode, morphology modulation, and optical property modulation are reviewed. The stacking mode and the intermolecular interaction depend on the molecular structure, which eventually determines the morphology of organic micro/nanocrystals. The morphologies of the organic micro/nanocrystals make the aggregates exhibit photon confinement or light-guiding properties as organic miniaturized optoelectronic devices. In this review, we conclude with a summary and put forward our perspective on the current challenges and the future development of morphology and optical tunable direction for the organic micro/nanocrystals.

show abstract

Processable and nanofibrous polyaniline:polystyrene-sulphonate (nano-PANI:PSS) for the fabrication of catalyst-free ammonium sensors and enzyme-coupled urea biosensors

Cited by 42 publications

References 52 publications

Electrochemical Signal Amplification Strategies and Their Use in Olfactory and Taste Evaluation

Electrochemical Signal Amplification Strategies and Their Use in Olfactory and Taste Evaluation

Highly Conductive and Dispersible Polyaniline Microtubes Controlled by Methyl Orange

Advances in organic micro/nanocrystals with tunable physicochemical properties

Contact Info

Product

Resources

About