Integration of 3D nanographene into mesoporous germanium

Sauze, Stéphanie; Aziziyan, Mohammad Reza; Brault, Pascal; Kolhatkar, Gitanjali; Ruediger, Andréas; Korinek, Andreas; Machon, Denis; Arès, Richard; Boucherif, Abderraouf

doi:10.1039/d0nr04937a

Cited by 6 publications

(17 citation statements)

References 59 publications

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“…Structural characterization of the Gr–MP-Ge has been carried out and reported in ref. 13 . According to XPS measurements performed at different etching times to evaluate the presence of carbon at different depths, the coating covers the pore walls as indicated by the presence of carbon after different etching times.…”

Section: Resultsmentioning

confidence: 99%

“…The graphene–mesoporous germanium nanocomposite (Gr–MP-Ge) was synthesized and characterized following the process reported in ref. 13 ( Fig. 1 ).…”

Section: Methodsmentioning

confidence: 97%

“…The temperature treatment may vary and this allows us to tune the graphene quality (domain size and disorder). 13 In this work, the treatment temperature was 873 K.…”

Section: Methodsmentioning

confidence: 99%

“…Such a nanocomposite was obtained with mesoporous silicon, 12 and more recently with mesoporous germanium (MP-Ge). 13 Such achievements allowed incorporating the remarkable properties of graphene for ample improvement of semiconductor-based devices, possibly beyond the limits set by their nature or fabrication processes. For instance, in the graphene–mesoporous silicon nanocomposite, the temperature stability of the materials has been drastically improved thanks to the graphene coating.…”

Section: Introductionmentioning

confidence: 99%

“…However, if the chemical and physical properties of a nanocomposite highly depend on the morphology of the different component materials, the nature of their interface is also a major determining factor of their resulting properties. 21,22 In the case of the graphene–mesoporous germanium nanocomposite (Gr–MP-Ge), it has been shown that the carbon coating of mesoporous Ge does not create Ge–C covalent bonding, 13 and the nature of the interaction between the components of the nanocomposite and its intensity remains to be characterized. Raman spectroscopy is a powerful tool not only as it provides a very rich fingerprint of graphene crystallinity or allows stacking order determination, but also as it provides access to understanding the adhesion property when it is combined with mechanical deformation.…”

Section: Introductionmentioning

confidence: 99%

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Probing the coupling between the components in a graphene–mesoporous germanium nanocomposite using high-pressure Raman spectroscopy

et al. 2021

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Section: Resultsmentioning

confidence: 99%

“…The graphene–mesoporous germanium nanocomposite (Gr–MP-Ge) was synthesized and characterized following the process reported in ref. 13 ( Fig. 1 ).…”

Section: Methodsmentioning

confidence: 97%

“…The temperature treatment may vary and this allows us to tune the graphene quality (domain size and disorder). 13 In this work, the treatment temperature was 873 K.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Probing the coupling between the components in a graphene–mesoporous germanium nanocomposite using high-pressure Raman spectroscopy

et al. 2021

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Large‐Scale Formation of Uniform Porous Ge Nanostructures with Tunable Physical Properties

Hanuš

Arias-Zapata

Ilahi

et al. 2023

Adv Materials Inter

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Porous germanium (PGe) nanostructures attract a lot of attention for various emerging applications due to their unique properties. Consequently, there is an increasing need for the development of low‐cost synthesis routes that are compatible with large‐scale production. Bipolar electrochemical etching (BEE) is a widely used solution for producing porous Ge layers. However, the lack of controllable production of large‐scale uniform PGe layers is the limiting factor for mainstream applications. Large‐scale homogeneous PGe layers formation is demonstrated by improving the BEE process. The PGe structures demonstrate excellent homogeneity in thickness and porosity, with a relative variation of below 2% across the 100 mm wafer. Furthermore, this process enables accurate tuning of the PGe's physical properties through variation of the etching parameters. PGe structures with porosity ranging from 40% to 80% and an adjustable thickness, while preserving low surface roughness are demonstrated, giving access to a large variety of PGe nanostructures for a wide range of applications. Ellipsometry and X‐ray reflectivity are employed to measure the porosity and thickness of PGe layers, providing fast and non‐destructive methods of characterization. These findings lay the groundwork for the large‐scale production of high‐quality PGe layers with on‐demand characteristics.

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Investigating Chain‐Like Core‐Shell Ge Nanowires Coated with Carbon Nanotubes Through Atomic Simulations: Implication for Improving Binding and Mechanical Properties

Zhao,

Guan,

Zhang

2024

Advcd Theory and Sims

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Atomic simulations within the classical mechanics' formalism are used to investigate the interfacial binding between carbon nanotubes (CNTs) and germanium nanowires (GeNWs) as well as the mechanical properties of the chain‐like coreshell germanium nanowires coated with CNTs. The simulations at the atomic scale provide the effect of temperature, systems’ cross–sectional diameter, interfacial distance, applied tension loading on their binding degree, and deformation behaviors. The simulation results reveal that the spacing between CNT and nanowires as well as the interfaces formed between them directly affect the thermal stability and the degree of interfacial bonding of the systems. The coreshell GeNWs coated with CNTs present significantly excellent mechanical properties. The Lode‐Nadai parameters and the atomic hydrostatic pressures on the atoms can be used to identify atoms’ bearing states in different regions and the stress‐transfer paths during different stages including elasticity, plasticity, and fracture of the confined systems.

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Integration of 3D nanographene into mesoporous germanium

Abstract: Integration of nanographene in a 3D mesoporous structure of germanium. This opens a wide variety of applications requiring a high specific surface area.

Cited by 6 publications

References 59 publications

Probing the coupling between the components in a graphene–mesoporous germanium nanocomposite using high-pressure Raman spectroscopy

Probing the coupling between the components in a graphene–mesoporous germanium nanocomposite using high-pressure Raman spectroscopy

Large‐Scale Formation of Uniform Porous Ge Nanostructures with Tunable Physical Properties

Investigating Chain‐Like Core‐Shell Ge Nanowires Coated with Carbon Nanotubes Through Atomic Simulations: Implication for Improving Binding and Mechanical Properties

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