Ligand-assisted deposition of ultra-small Au nanodots on Fe<sub>2</sub>O<sub>3</sub>/reduced graphene oxide for flexible gas sensors

Wang, Jian; Fatima-Ezzahra, Essalhi; Dai, Jie; Liu, Yanlei; Pei, Chengjie; Li, Hai; Wang, Zhiwei; Huang, Xiao

doi:10.1039/d1na00734c

Cited by 10 publications

(4 citation statements)

References 62 publications

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“…Upon exposure to NO 2 (an oxidizing gas), the BiOCl film and Bi 2 Se 3 film showed decreased and increased resistance, respectively, consistent with their p-type and n-type semiconducting properties [54][55][56][57]. However, their sensitivities are poor (e.g., 1.8% response at 1 ppm for BiOCl and 5.4% response at 1 ppm for Bi 2 Se 3 ).…”

Section: Resultsmentioning

confidence: 78%

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

et al. 2022

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Most van der Waals two-dimensional (2D) materials without surface dangling bonds show limited surface activities except for their edge sites. Ultrathin Bi2Se3, a topological insulator that behaves metal-like under ambient conditions, has been overlooked on its surface activities. Herein, through a topochemical conversion process, ultrathin nanoporous Bi2Se3 layers were epitaxially deposited on BiOCl nanosheets with strong electronic coupling, leading to hybrid electronic states with further bandgap narrowing. Such oriented nanoporous Bi2Se3 layers possessed largely exposed active edge sites, along with improved surface roughness and film forming ability even on inkjet-printed flexible electrodes. Superior room-temperature NO2 sensing performance was achieved compared to other 2D materials under bent conditions. Our work demonstrates that creating nanoscale features in 2D materials through topochemical heteroepitaxy is promising to achieve both favorable electronic properties and surface activity toward practical applications.

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Section: Resultsmentioning

confidence: 78%

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

et al. 2022

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“…Wang et al 185 reported the functionalization of Au nanodots (NDs) with a size of 1.7 nanometers on the surface of α-Fe 2 O 3 /rGO for NO 2 sensing. Mercaptohexadecanoic acid (MHA) and 1-octadecanethiol (OTD) are used as ligands for different samples.…”

Section: Compounded Mos Functionalized With Au Npsmentioning

confidence: 99%

“…Fig. 13 Schematic illustration of the preparation of the flexible NO 2 sensor, with photographs of the printed Ag electrode array and flexible gas sensor coated with Au ND-ODT/a-Fe 2 O 3 /rGO 185. …”

mentioning

confidence: 99%

The enhanced sensing properties of MOS-based resistive gas sensors by Au functionalization: a review

Luan,

Hu,

et al. 2023

Dalton Trans.

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“…On the other hand, Wang et al [82] fabricated an interesting NO 2 gas sensor based on α-Fe 2 O 3 /rGO and Au nanodots on α-Fe 2 O 3 /rGO with 1-octadecanethiol as the surface ligand (Au ND-ODT/α-Fe 2 O 3 /rGO). Fig.…”

Section: Screen-print/epoxy Substratementioning

confidence: 99%

Progress and Insights on Graphene and MXene‐based Emerging 2‐Dimensional Conductive Nanomaterials for Fabrication of Flexible Gas Sensors

Wang,

Yeap,

Cheok

et al. 2023

ChemBioEng Reviews

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Owing to the unique properties such as pristine interfaces, ultra‐thin and uniform thickness, 2D nanomaterials have attracted the attention from many researchers. Particularly, rGO and MXene 2D nanomaterials have received intense research interest in the application of gas sensors due to their high electrical conductivity. The coating of these 2D nanomaterials onto plastic, paper or textile substrate formed flexible, stretchable and portable gas sensors as an alternative to the conventional rigid gas sensors. To date, numerous research works on flexible gas sensors using either graphene or MXene have been published. However, the reported data is scattered and varied by multiple factors. In this short review, we revisit the advances in the current application of 2D conductive nanomaterials (mainly rGO and MXene) and their nanocomposites with metal oxides on flexible gas sensors. We focus on recent developments regarding the working mechanism, advantages, disadvantages, and performances (including gas response, selectivity, response time, and recovery time) of each type of gas sensor. Finally, this short review sheds light on future directions and prospects in the field of flexible gas sensors using 2D nanomaterials.

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Ligand-assisted deposition of ultra-small Au nanodots on Fe₂O₃/reduced graphene oxide for flexible gas sensors

Abstract: This work demonstrates introducing noble metal nanodots with suitable surface ligands in gas sensing materials is an effective way to improve their performance, and noble metal/metal oxide/rGO composites have potentials in flexible gas sensing.

Cited by 10 publications

References 62 publications

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

The enhanced sensing properties of MOS-based resistive gas sensors by Au functionalization: a review

Progress and Insights on Graphene and MXene‐based Emerging 2‐Dimensional Conductive Nanomaterials for Fabrication of Flexible Gas Sensors

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Ligand-assisted deposition of ultra-small Au nanodots on Fe2O3/reduced graphene oxide for flexible gas sensors

Abstract: This work demonstrates introducing noble metal nanodots with suitable surface ligands in gas sensing materials is an effective way to improve their performance, and noble metal/metal oxide/rGO composites have potentials in flexible gas sensing.

Cited by 10 publications

References 62 publications

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

Realization of Oriented and Nanoporous Bismuth Chalcogenide Layers via Topochemical Heteroepitaxy for Flexible Gas Sensors

The enhanced sensing properties of MOS-based resistive gas sensors by Au functionalization: a review

Progress and Insights on Graphene and MXene‐based Emerging 2‐Dimensional Conductive Nanomaterials for Fabrication of Flexible Gas Sensors

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Product

Resources

About

Ligand-assisted deposition of ultra-small Au nanodots on Fe₂O₃/reduced graphene oxide for flexible gas sensors