Au<sub>3</sub>-Decorated graphene as a sensing platform for O<sub>2</sub> adsorption and desorption kinetics

Libeert, Guillaume; Murugesan, R.; Guba, Márton; Keijers, Wout; Collienne, Simon; Raes, Bart; Brems, Steven; Gendt, Stefan De; Silhanek, Alejandro; Höltzl, Tibor; Houssa, Michel; Vondel, J. Van de; Janssens, Ewald

doi:10.1039/d2nr03076d

Cited by 3 publications

(4 citation statements)

References 52 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an approach minimizes the effect of contact resistances. [ 51 ] The sheet resistivity can be calculated as

{\rho}_{\textit{sheet}} = (W/L)(\Delta V/{I}_{B})

, [ 37,52 ] where

\Delta V

is the measured voltage between the middle contacts,

{I}_{B}

is the applied current (i.e., 1 µA), and

W

and

L

are the width (100 µm) and the length (50 µm) of the probed area, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Han,

Pham,

Pilarczyk

et al. 2024

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

Electrically tunable graphene‐metal metasurfaces with controllable optical properties have attracted interest for straightforward manipulation of free space light. Their resonance tuning range depends on graphene's electrical transport characteristics, which are affected by its quality, operating conditions, and the device design. An important example of the latter is the direct contact of metallic antennas with the graphene layer that limits the extent to which a bias voltage can tune the metasurface's permittivity. In this work, this issue is resolved in a straightforward and fabrication‐efficient way for graphene‐metal hybrid metasurfaces with multiple plasmonic resonances. It is demonstrated that the incorporation of a 10 nm Al2O3 barrier layer enhances the tuning range of mid‐infrared resonances compared to metasurfaces without barrier layer, i.e., from 300 to 700 nm for a 7.3 µm resonance and from 110 to 140 nm for a 4.7 µm resonance. The improved tunability of the metal/dielectric/graphene metasurface can be attributed to the reduced electrical coupling between metal and graphene, as confirmed by an equivalent circuit model. These results bring closer the use of active metasurfaces based on two‐dimensional materials under ambient conditions, with possible applications as optical filters, modulators, and information processing devices that require dynamic control of light.

show abstract

“…Such an approach minimizes the effect of contact resistances. [ 51 ] The sheet resistivity can be calculated as

{\rho}_{\textit{sheet}} = (W/L)(\Delta V/{I}_{B})

, [ 37,52 ] where

\Delta V

is the measured voltage between the middle contacts,

{I}_{B}

is the applied current (i.e., 1 µA), and

W

and

L

are the width (100 µm) and the length (50 µm) of the probed area, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Han,

Pham,

Pilarczyk

et al. 2024

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Yang et al investigated the tunability of palladium decorated graphene, which can be used as formaldehyde detector . Libeert et al showed the high sensitivity of graphene-supported Au 3 cluster for observing the ad- and desorption kinetics of oxygen molecules …”

Section: Introductionmentioning

confidence: 99%

“…showed the high sensitivity of graphene-supported Au 3 cluster for observing the ad-and desorption kinetics of oxygen molecules. 37 The stability analysis of the support anchored clusters helps to select the most prominent models both for the catalyst and sensor material. 38,39 Here, the accurate description of the interaction between the graphene-based support and the clusters is essential, which requires the inclusion of spatially long-range terms.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability and Electronic Structure of Nitrogen-Doped Graphene-Supported Cu_n (n = 1–5) Clusters in Vacuum and under Electrochemical Conditions: Toward Sensor and Catalyst Design

Guba,

Höltzl

2024

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

Here, we present a detailed computational study of the stability and the electronic structure of nitrogen-doped graphene (N 4 V 2 ) supported Cu n (n = 1−5) clusters, which are promising carbon-dioxide electroreduction catalysts. The binding of the clusters to the nitrogen-doped graphene and the electronic structure of these systems were investigated under vacuum and electrochemical conditions. The stability analysis showed that among the systems, the nitrogen-doped graphene bound Cu 4 is the most stable in vacuum, while in an electrolyte, and at a negative potential, the N 4 V 2 −Cu 3 is energetically more favorable. The ground state electronic structure of the nitrogen-doped graphene substrate undergoes topological phase transition, from a semimetallic state, and we observed a metallic and topologically trivial state after the clusters are deposited. The electrode potential adjusts the type and density of the charge carriers in the semimetallic models, while the structures containing copper exhibit bands which are deformed and relaxed by the modified number of electrons.

show abstract

Magnetic clusters as efficient EY-like spin-scattering centres in graphene

Keijers,

Murugesan,

Libeert

et al. 2024

Nanoscale

View full text Add to dashboard Cite

show abstract

Au₃-Decorated graphene as a sensing platform for O₂ adsorption and desorption kinetics

Abstract: The adsorption and desorption kinetics of molecules is of significant fundamental and applied interest. In this paper, we present a new method to quantify the energy barriers for the adsorption...

Cited by 3 publications

References 52 publications

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Stability and Electronic Structure of Nitrogen-Doped Graphene-Supported Cu_n (n = 1–5) Clusters in Vacuum and under Electrochemical Conditions: Toward Sensor and Catalyst Design

Magnetic clusters as efficient EY-like spin-scattering centres in graphene

Contact Info

Product

Resources

About

Au3-Decorated graphene as a sensing platform for O2 adsorption and desorption kinetics

Abstract: The adsorption and desorption kinetics of molecules is of significant fundamental and applied interest. In this paper, we present a new method to quantify the energy barriers for the adsorption...

Cited by 3 publications

References 52 publications

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Tunable Mid‐Infrared Multi‐Resonant Graphene‐Metal Hybrid Metasurfaces

Stability and Electronic Structure of Nitrogen-Doped Graphene-Supported Cun (n = 1–5) Clusters in Vacuum and under Electrochemical Conditions: Toward Sensor and Catalyst Design

Magnetic clusters as efficient EY-like spin-scattering centres in graphene

Contact Info

Product

Resources

About

Au₃-Decorated graphene as a sensing platform for O₂ adsorption and desorption kinetics

Stability and Electronic Structure of Nitrogen-Doped Graphene-Supported Cu_n (n = 1–5) Clusters in Vacuum and under Electrochemical Conditions: Toward Sensor and Catalyst Design