We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Electrolyte-Gated Field-Effect Transistor-Based Sensor for Nanoplastic Detection: A Sensitivity Investigation of Two Nanoplastic Models
Summary
Researchers developed a transistor-based sensor using carbon nanotube channels to detect nanoplastics in water. The sensor showed comparable sensitivity for both non-functionalized and carboxylated polystyrene nanoplastics, attributed to hydrophobic interactions between the carbon nanotubes and plastic particles. The study offers a starting point for fast, reliable nanoplastic detection in aquatic environments.
Nanoplastics (NPs) accumulating in the environment pose a severe environmental threat, harming both animals and humans. This urgently calls for reliable, fast and easy to use sensing methods. In this work we investigated the use of an electrolyte-gated field-effect-transistor (EG-FET) based sensor with a carbon nanotube (CNT) semiconducting channel (EG-CNTFET) for the detection of NPs in aquatic environments. A variety of NP models, made from different materials and with different surface modifications, are nowadays available. Here, we compared the EG-CNTFET sensitivity using two NP models: polystyrene NPs with both non-functionalized and carboxylated surface. The EG-CNTFET devices presented a sensitivity of $22.6 \mu A/(1mg/ml)$ for non-functionalized NPs, and of $20.9 \mu A/(1mg/ml)$ for carboxylated NPs. This sensitivity is attributed to the hydrophobic interaction between CNTs and the NPs. Indeed, through atomic force microscopy, NPs were observed on the CNTs network. This study offers a starting point for future use of EG-FET-based sensors for detection of environmentally relevant NPs.
Sign in to start a discussion.
More Papers Like This
Transistor-Based Nanoplastics Sensor: Investigation of Sensitivity Towards Polystyrene and Polyethylene Terephthalate
Researchers explored the use of electrolyte-gated carbon nanotube field-effect transistors as sensors for detecting nanoplastics in water. The study found that the sensors exhibited distinct electrical responses to polystyrene and PET nanoplastics, suggesting that transistor-based approaches could provide a simple and reliable method for nanoplastic detection in environmental samples.
Electrolyte-Gated Carbon Nanotube Field-Effect Transistor-Based Sensors for Nanoplastics Detection in Seawater: A Study of the Interaction between Nanoplastics and Carbon Nanotubes
Researchers developed a novel sensor based on an electrolyte-gated carbon nanotube field-effect transistor for detecting nanoplastics in seawater. The sensor demonstrated high sensitivity and the ability to detect polystyrene nanoplastics at very low concentrations, offering a faster and more portable alternative to traditional spectroscopy methods. The study suggests this technology could enable more accessible and widespread monitoring of nanoplastic contamination in marine environments.
Polystyrene Nanoplastic‐Mercury Complexes Detection by Electrolyte‐Gated Carbon Nanotube Field‐Effect Transistor‐Based Sensors
Researchers examined the ability of an electrolyte-gated carbon nanotube field-effect transistor sensor to detect polystyrene nanoplastics in the presence of mercury ions, forming PS nanoplastic-mercury complexes through mercury sorption onto nanoplastic surfaces. The EG-CNTFET sensor successfully distinguished nanoplastic-mercury complexes in realistic multi-pollutant scenarios, advancing detection of nanoplastics as vectors for co-transported environmental pollutants.
Novel unlabeled electrochemical sensing platform based on highly electroactive Cu-MOF film for nanoplastic detection in water
Researchers developed an electrochemical sensor using a copper-based metal-organic framework film on carbon nanotubes to detect nanoplastics in water without fluorescent labels, demonstrating that polystyrene nanoplastics adsorbing onto the sensor surface measurably inhibit electrical current in a concentration-dependent manner across particle sizes from 100 nm to 1 µm.
Microplastic in situ detection based on a portable triboelectric microfluidic sensor
Researchers developed a portable triboelectric microfluidic sensor that detects microplastics in water by measuring electrical charges generated as particles flow through a microchannel, demonstrating linear response to polystyrene particle size and concentration for field-deployable environmental monitoring.