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Sensing Molecules with Metal–Organic Framework Functionalized Graphene Transistors

Kumar, Sandeep ; Pramudya, Yohanes ; Müller, Kai ; Chandresh, Abhinav ; Dehm, Simone ; Heidrich, Shahriar ; Fediai, Artem ; Parmar, Devang ; Perera, Delwin ; Rommel, Manuel ; Heinke, Lars ; Wenzel, Wolfgang ; Wöll, Christof ; Krupke, Ralph (2023)
Sensing Molecules with Metal–Organic Framework Functionalized Graphene Transistors.
In: Advanced Materials, 2021, 33 (43)
doi: 10.26083/tuprints-00021004
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Sensing Molecules with Metal–Organic Framework Functionalized Graphene Transistors
Language: English
Date: 11 December 2023
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Materials
Volume of the journal: 33
Issue Number: 43
Collation: 12 Seiten
DOI: 10.26083/tuprints-00021004
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Graphene is inherently sensitive to vicinal dielectrics and local charge distributions, a property that can be probed by the position of the Dirac point in graphene field‐effect transistors. Exploiting this as a useful sensing principle requires selectivity; however, graphene itself exhibits no molecule‐specific interaction. Complementarily, metal–organic frameworks can be tailored to selective adsorption of specific molecular species. Here, a selective ethanol sensor is demonstrated by growing a surface‐mounted metal–organic framework (SURMOF) directly onto graphene field‐effect transistors (GFETs). Unprecedented shifts of the Dirac point, as large as 15 V, are observed when the SURMOF/GFET is exposed to ethanol, while a vanishingly small response is observed for isopropanol, methanol, and other constituents of the air, including water. The synthesis and conditioning of the hybrid materials sensor with its functional characteristics are described and a model is proposed to explain the origin, magnitude, and direction of the Dirac point voltage shift. Tailoring multiple SURMOFs to adsorb specific gases on an array of such devices thus generates a versatile, selective, and highly sensitive platform for sensing applications.

Uncontrolled Keywords: alcohol, graphene, metal–organic frameworks, sensing, transistors
Identification Number: 2103316
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-210047
Classification DDC: 500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
Date Deposited: 11 Dec 2023 13:56
Last Modified: 23 Feb 2024 07:20
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21004
PPN: 515639117
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