Chemical Sensing with Atomically Thin Platinum Templated by a 2D Insulator
Journal article, 2020

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.

nanomaterials

atomically thin materials

chemical sensors

buffer layer

Author

Kyung Ho Kim

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Hans He

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Marius Rodner

Linköping University

Rositsa Yakimova

Linköping University

Karin Larsson

Uppsala University

Marten Piantek

University of Zaragoza

David Serrate

University of Zaragoza

Alexei Zakharov

MAX IV Laboratory, Lund, 22100 Sweden

Sergey Kubatkin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Jens Eriksson

Linköping University

Samuel Lara Avila

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Advanced Materials Interfaces

2196-7350 (eISSN)

Vol. 7 12 1902104

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Subject Categories

Physical Sciences

Nano Technology

Infrastructure

Chalmers Materials Analysis Laboratory

Nanofabrication Laboratory

DOI

10.1002/admi.201902104

More information

Latest update

7/3/2020 6