Layer-by-Layer Nano Self-Assembly of pH Sensors Based on Polyelectrolytes and Carboxylated Carbon Nanotubes

Cui, Tianhong

doi:10.1149/1.2992222

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The process is based on the self-assembly of oppositely charged layers, like carboxylated single-walled carbon nanotube (SWNT) self-assembly with a polycation, poly(diallyldimethyammonium chloride (PDDA) used for pH sensing [22]. As polycations, different conductive polymers can be used, like polyaniline (PANI) [23][24], poly(dimethyldiallylammonium chloride) (PDDAC) [25], polyethyleneglycol (PEG) [26], and as carbon material graphene oxide (GO) [27], CVD graphene [28], different nanotubular carbon forms [22,26] and others. These sensors have been applied for temperature sensing [29], humidity measurements [25,30], VOCs sensing [26,31], and also as electrochemical sensors [32].…”

Section: Of 18mentioning

confidence: 99%

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-based Sensors

Al‐Hamry¹,

Lu²,

Bai³

et al. 2022

Preprint

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Precise monitoring of different environmental parameters and contaminations during food processing and storage is a key factor for maintaining its safety and nutritional value. Thus, developing reliable, efficient, cost-effective sensor devices for these purposes is of utmost importance. In this paper, we show that Poly-(diallyl-dimethylammonium chloride)/reduced Graphene oxide (PDAC/rGO) films produced by a simple Layer-by-Layer deposition can be effectively used to monitor temperature, relative humidity and the presence of volatile organic compounds as indicators for spoilage odors. At the same time, they show potential for electrochemical detection of organophosphate pesticide dimethoate. By monitoring the resistance/impedance changes during temperature and relative humidity variations or upon the exposure of PDAC/rGO films to methanol, good linear responses were obtained in the temperature range of 10-100 °C, 15-95 % relative humidity, and 35 ppm - 55 ppm of methanol. Moreover, linearity in the electrochemical detection of dimethoate is shown for the concentrations in the order of 102 µmol dm−3. The analytical response to different external stimuli and analytes depends on the number of layers deposited, affecting sensors’ sensitivity, response and recovery time, and long-term stability. The presented results could serve as a starting point for developing advanced multimodal sensor devices and sensor arrays with high potential for analytical applications in food safety and quality monitoring.

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Section: Of 18mentioning

confidence: 99%

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-based Sensors

Al‐Hamry¹,

Lu²,

Bai³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-Based Sensors

Al‐Hamry

Bai

et al. 2023

Foods

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Different environmental parameters, such as temperature and humidity, aggravate food spoilage, and different volatile organic compounds (VOCs) are released based on the extent of spoilage. In addition, a lack of efficient monitoring of the dosage of pesticides leads to crop failure. This could lead to the loss of food resources and food production with harmful contaminants and a short lifetime. For this reason, precise monitoring of different environmental parameters and contaminations during food processing and storage is a key factor for maintaining its safety and nutritional value. Thus, developing reliable, efficient, cost-effective sensor devices for these purposes is of utmost importance. This paper shows that Poly-(diallyl-dimethyl ammonium chloride)/reduced Graphene oxide (PDAC/rGO) films produced by a simple Layer-by-Layer deposition can be effectively used to monitor temperature, relative humidity, and the presence of volatile organic compounds as indicators for spoilage odors. At the same time, they show potential for electrochemical detection of organophosphate pesticide dimethoate. By monitoring the resistance/impedance changes during temperature and relative humidity variations or upon the exposure of PDAC/rGO films to methanol, good linear responses were obtained in the temperature range of 10–100 °C, 15–95% relative humidity, and 35 ppm–55 ppm of methanol. Moreover, linearity in the electrochemical detection of dimethoate is shown for the concentrations in the order of 102 µmol dm−3. The analytical response to different external stimuli and analytes depends on the number of layers deposited, affecting sensors’ sensitivity, response and recovery time, and long-term stability. The presented results could serve as a starting point for developing advanced multi-modal sensors and sensor arrays with high potential for analytical applications in food safety and quality monitoring.

show abstract

Layer-by-Layer Nano Self-Assembly of pH Sensors Based on Polyelectrolytes and Carboxylated Carbon Nanotubes

Cited by 2 publications

References 11 publications

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-based Sensors

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-based Sensors

Layer-by-Layer Deposited Multi-Modal PDAC/rGO Composite-Based Sensors

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