Chemical Sensing with Atomically Thin Platinum Templated by a 2D Insulator
(2020) In Advanced Materials Interfaces 7(12).- Abstract
Boosting the sensitivity of solid-state gas sensors by incorporating nanostructured materials as the active sensing element can be complicated by interfacial effects. Interfaces at nanoparticles, grains, or contacts may result in nonlinear current–voltage response, high electrical resistance, and ultimately, electric noise that limits the sensor read-out. This work reports the possibility to prepare nominally one atom thin, electrically continuous platinum layers by physical vapor deposition on the carbon zero layer (also known as the buffer layer) grown epitaxially on silicon carbide. With a 3–4 Å thin Pt layer, the electrical conductivity of the metal is strongly modulated when interacting with chemical analytes, due to charges being... (More)
Boosting the sensitivity of solid-state gas sensors by incorporating nanostructured materials as the active sensing element can be complicated by interfacial effects. Interfaces at nanoparticles, grains, or contacts may result in nonlinear current–voltage response, high electrical resistance, and ultimately, electric noise that limits the sensor read-out. This work reports the possibility to prepare nominally one atom thin, electrically continuous platinum layers by physical vapor deposition on the carbon zero layer (also known as the buffer layer) grown epitaxially on silicon carbide. With a 3–4 Å thin Pt layer, the electrical conductivity of the metal is strongly modulated when interacting with chemical analytes, due to charges being transferred to/from Pt. The strong interaction with chemical species, together with the scalability of the material, enables the fabrication of chemiresistor devices for electrical read-out of chemical species with sub part-per-billion (ppb) detection limits. The 2D system formed by atomically thin Pt on the carbon zero layer on SiC opens up a route for resilient and high sensitivity chemical detection, and can be the path for designing new heterogenous catalysts with superior activity and selectivity.
(Less)
- author
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- atomically thin materials, buffer layer, chemical sensors, nanomaterials
- in
- Advanced Materials Interfaces
- volume
- 7
- issue
- 12
- article number
- 1902104
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:85084154082
- ISSN
- 2196-7350
- DOI
- 10.1002/admi.201902104
- language
- English
- LU publication?
- yes
- id
- 96a87b0f-ff84-4aa0-9ffb-04da7086f0d2
- date added to LUP
- 2021-01-12 09:56:57
- date last changed
- 2022-04-26 23:24:24
@article{96a87b0f-ff84-4aa0-9ffb-04da7086f0d2,
abstract = {{<p>Boosting the sensitivity of solid-state gas sensors by incorporating nanostructured materials as the active sensing element can be complicated by interfacial effects. Interfaces at nanoparticles, grains, or contacts may result in nonlinear current–voltage response, high electrical resistance, and ultimately, electric noise that limits the sensor read-out. This work reports the possibility to prepare nominally one atom thin, electrically continuous platinum layers by physical vapor deposition on the carbon zero layer (also known as the buffer layer) grown epitaxially on silicon carbide. With a 3–4 Å thin Pt layer, the electrical conductivity of the metal is strongly modulated when interacting with chemical analytes, due to charges being transferred to/from Pt. The strong interaction with chemical species, together with the scalability of the material, enables the fabrication of chemiresistor devices for electrical read-out of chemical species with sub part-per-billion (ppb) detection limits. The 2D system formed by atomically thin Pt on the carbon zero layer on SiC opens up a route for resilient and high sensitivity chemical detection, and can be the path for designing new heterogenous catalysts with superior activity and selectivity.</p>}},
author = {{Kim, Kyung Ho and He, Hans and Rodner, Marius and Yakimova, Rositsa and Larsson, Karin and Piantek, Marten and Serrate, David and Zakharov, Alexei and Kubatkin, Sergey and Eriksson, Jens and Lara-Avila, Samuel}},
issn = {{2196-7350}},
keywords = {{atomically thin materials; buffer layer; chemical sensors; nanomaterials}},
language = {{eng}},
number = {{12}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Advanced Materials Interfaces}},
title = {{Chemical Sensing with Atomically Thin Platinum Templated by a 2D Insulator}},
url = {{http://dx.doi.org/10.1002/admi.201902104}},
doi = {{10.1002/admi.201902104}},
volume = {{7}},
year = {{2020}},
}