Combining Chemical Functionalization and FinFET Geometry for Field Effect Sensors as Accessible Technology to Optimize pH Sensing [* Cross-Reference *]

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Dipti Rani; Serena Rollo; Wouter Olthuis; Sivashankar Krishnamoorthy; César Pascual García, 2026, "Combining Chemical Functionalization and FinFET Geometry for Field Effect Sensors as Accessible Technology to Optimize pH Sensing [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.CSKV5E, LIST Open Repository, V1
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Description
Field Effect Transistors (FETs) have led the progress of applications measuring the acidity
in aqueous solutions thanks to their accuracy, ease of miniaturization and capacity of multiplexing.
The signal-to-noise ratio and linearity of the sensors are two of the most relevant figures of merit that
can facilitate the improvements of these devices. In this work we present the functionalization with
aminopropyltriethoxysilane (APTES) of a promising new FET design consisting of a high height-towidth
aspect ratio with an efficient 2D gating architecture that improves both factors. We measured
the transistor transfer and output characteristics before and after APTES functionalization, obtaining
an improved sensitivity and linearity in both responses. We also compared the experimental results
with a site-biding model of the surface buffering capacity of the APTES functionalized layers. (2022-12-07)
***This entry has been automatically imported via OpenAlex by LIST harvest scripts. Please refer to https://doi.org/10.5281/zenodo.7409450 for the original and latest version of the publication*** (2026-07-01)
Subject Chemistry; Earth and Environmental Sciences; Engineering; Physics
Keyword Surface modification, Materials science, Field (mathematics), Nanotechnology, Computer science, Engineering, Mechanical engineering, Mathematics, Pure mathematics
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