2D materials towards energy conversion processes in nanofluidics

Acosta, Selene; Ojeda-Galván, H. Joazet; Quintana, Mildred

doi:10.1039/d3cp00702b

Cited by 3 publications

(1 citation statement)

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“…The almost full d-orbitals in the electronic structure of 2D-TMDs allow the layer-dependent bandgaps tuning, electrostatic coupling, and photo switching, making them excellent materials for field-effect transistors (FETs), ultrasensitive sensors, flexible electronics, fluorescence quenchers, and Raman enhancers [ 75 ]. In addition, 2D-TMDs can be easily integrated into membranes by a simple vacuum filtration methodology, improving the sensing mechanism in microfluidic and nanofluidic systems [ 76 ]. The electrical properties and the chemical structure of 2D-TMDs allow the design and production of adaptable transductors for electrochemical, optical, electrical, and SERS detection, demonstrating great potential for the massive production of flexible and reliable sensors.…”

Section: Concluding Remarks and Perspectivesmentioning

confidence: 99%

Chemically Functionalized 2D Transition Metal Dichalcogenides for Sensors

Acosta,

Quintana

2024

Sensors

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The goal of the sensor industry is to develop innovative, energy-efficient, and reliable devices to detect molecules relevant to economically important sectors such as clinical diagnoses, environmental monitoring, food safety, and wearables. The current demand for portable, fast, sensitive, and high-throughput platforms to detect a plethora of new analytes is continuously increasing. The 2D transition metal dichalcogenides (2D-TMDs) are excellent candidates to fully meet the stringent demands in the sensor industry; 2D-TMDs properties, such as atomic thickness, large surface area, and tailored electrical conductivity, match those descriptions of active sensor materials. However, the detection capability of 2D-TMDs is limited by their intrinsic tendency to aggregate and settle, which reduces the surface area available for detection, in addition to the weak interactions that pristine 2D-TMDs normally exhibit with analytes. Chemical functionalization has been proposed as a consensus solution to these limitations. Tailored surface modification of 2D-TMDs, either by covalent functionalization, non-covalent functionalization, or a mixture of both, allows for improved specificity of the surface–analyte interaction while reducing van der Waals forces between 2D-TMDs avoiding agglomeration and precipitation. From this perspective, we review the recent advances in improving the detection of biomolecules, heavy metals, and gases using chemically functionalized 2D-TMDs. Covalent and non-covalent functionalized 2D-TMDs are commonly used for the detection of biomolecules and metals, while 2D-TMDs functionalized with metal nanoparticles are used for gas and Raman sensors. Finally, we describe the limitations and further strategies that might pave the way for miniaturized, flexible, smart, and low-cost sensing devices.

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Section: Concluding Remarks and Perspectivesmentioning

confidence: 99%