Covalently‐Bonded Diaphite Nanoplatelet with Engineered Electronic Properties of Diamond

Zhai, Zhaofeng; Zhang, Chuyan; Chen, Bin; Xiong, Ying; Liang, Yan; Liu, Lusheng; Yang, Bing; Yang, Nianjun; Jiang, Xin; Huang, Nan

doi:10.1002/adfm.202401949

Cited by 4 publications

(2 citation statements)

References 61 publications

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“…Two distinct types of BCNW nanostructures were identified and visualized. The first type is characterized by long fibers that originate near the substrate surface and grow perpendicular to it, spanning nearly the full depth of layer . Complementing these are shorter, randomly oriented BCNWs.…”

Section: Resultsmentioning

confidence: 99%

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Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Pierpaoli,

Jakóbczyk,

Ficek

et al. 2024

ACS Appl. Mater. Interfaces

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Tailoring the defects in graphene and its related carbon allotropes has great potential to exploit their enhanced electrochemical properties for energy applications, environmental remediation, and sensing. Vertical graphene, also known as carbon nanowalls (CNWs), exhibits a large surface area, enhanced charge transfer capability, and high defect density, making it suitable for a wide range of emerging applications. However, precise control and tuning of the defect size, position, and density remain challenging; moreover, due to their characteristic labyrinthine morphology, conventional characterization techniques and widely accepted quality indicators fail or need to be reformulated. This study primarily focuses on examining the impact of boron heterodoping and argon plasma treatment on CNW structures, uncovering complex interplays between specific defect-induced three-dimensional nanostructures and electrochemical performance. Moreover, the study introduces the use of defect-rich CNWs as a label-free electrode for directly oxidizing glyphosate (GLY), a common herbicide, and its metabolites (sarcosine and aminomethylphosphonic acid) for the first time. Crucially, we discovered that the presence of specific boron bonds (BC and BN), coupled with the absence of Lewis-base functional groups such as pyridinic-N, is essential for the oxidation of these analytes. Notably, the D+D* second-order combinational Raman modes at ≈2570 cm −1 emerged as a reliable indicator of the analytes' affinity. Contrary to expectations, the electrochemically active surface area and the presence of oxygen-containing functional groups played a secondary role. Argon-plasma post-treatment was found to adversely affect both the morphology and surface chemistry of CNWs, leading to an increase in sp 3hybridized carbon, the introduction of oxygen, and alterations in the types of nitrogen functional groups. Simulations support that certain defects are functional for GLY rather than AMPA. Sarcosine oxidation is the least affected by defect type.

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Section: Resultsmentioning

confidence: 99%

“…The first type is characterized by long fibers that originate near the substrate surface and grow perpendicular to it, spanning nearly the full depth of layer. 29 Complementing these are shorter, randomly oriented BCNWs. Additionally, an amorphous carbon phase is present, situated between the graphitic phases.…”

Section: Resultsmentioning

confidence: 99%

Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Pierpaoli,

Jakóbczyk,

Ficek

et al. 2024

ACS Appl. Mater. Interfaces

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Heterogeneous Structured Nanomaterials from Carbon and Related Materials

Yin,

Hou,

et al. 2024

Adv Funct Materials

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Heterogeneous structured nanomaterials can be considered as a class of advanced materials that integrate multiple phases, different elements, or components into a single nanoscale structure. For such materials, the different phases, components and their interactions are highly variable and tunable, which open a new avenue for the creation of new materials with unique properties unattainable by the corresponding single‐phase materials. In this review, heterogeneous structured nanomaterials constructed by different carbon allotropes are focused. Due to the unique bonding ability of carbon element, the diverse heterogeneous structures constructed by carbon structures with different dimensions possess distinctive structures and exhibit fascinating properties, providing unprecedented opportunities for various application fields, including electronic/optoelectronic devices, superhard materials, etc. This review provides a systematic elaboration for carbon‐based heterogeneous structured nanomaterials, highlighting their dimension‐dependent structural diversity, unique properties, and application prospects.

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Microscopic Insights into Metallization of Diamond with Transition Metals

Fan,

Zhao,

Zhang

et al. 2024

Adv Funct Materials

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Metallization of diamond with transition metals (TMs) has attracted much attention as they play an important role in the development of precision machining, high‐end thermal management, especially for electronic devices. However, it is found that the solid‐state reaction does not stop at the interface, potentially hampering interface engineering. To unleash the full potential of diamond devices, deeper reactions are investigated in monocrystalline intrinsic diamond metallized with Ti/Pt/Au ohmic contacts combing experiments and theoretical calculations. Apart from exhibiting TiC, graphite, TMs, and diamond nanocrystallites at the interface, a unique ion‐implanted‐like multilayered structure is observed at micrometer depth. TM atoms penetrate through diamond produce a buried amorphous carbon layer under the damaged diamond lattice. In addition, these theoretical calculations reveal that the structural amorphization is catalyzed by the incorporation of TM atoms through vacancy‐mediated diffusion, which induces the closure of the bandgap of the diamond. This facilitates carriers crossing the bandgap via impurity band conduction and promotes the formation of the ohmic contact. This study provides critical insight into the microscopic mechanisms of the metallization between diamonds and TMs and could facilitate the development of diamond‐based electronic devices with a tailored electronic property.

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Covalently‐Bonded Diaphite Nanoplatelet with Engineered Electronic Properties of Diamond

Cited by 4 publications

References 61 publications

Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Heterogeneous Structured Nanomaterials from Carbon and Related Materials

Microscopic Insights into Metallization of Diamond with Transition Metals

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