Evolution of ordered nanoporous phases during h-BN growth: controlling the route from gas-phase precursor to 2D material by <i>in situ</i> monitoring

Ruckhofer, Adrian; Sacchi, Marco; Payne, Anthony John Ramsay J. R.; Jardine, A. P.; Ernst, Wolfgang; Avidor, Nadav; Tamtögl, Anton

doi:10.1039/d2nh00353h

Cited by 6 publications

(6 citation statements)

References 75 publications

(173 reference statements)

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“…1 The assembly and stability of organic thin-films on surfaces is largely determined by its structural properties such as alignment, molecule-substrate interaction and defects. Moreover, an exact description of the interactions in aromatic carbon systems is of paramount importance for the design of carbon based nanomaterials 2 . Here we address the question how the van der Waals bonding strength upon adsorption of aromatic organic compounds on graphite influences the adsorbate structure, thermal stability and the growth mode.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, an exact description of the interactions in aromatic carbon systems is of paramount importance for the design of carbon-based nanomaterials. 2 Here we address the question of how the van der Waals bonding strength upon adsorption of aromatic organic compounds on graphite influences the adsorbate structure, thermal stability and growth mode.…”

Section: Introductionmentioning

confidence: 99%

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How does tuning the van der Waals bonding strength affect adsorbate structure?

Maier

Xavier

Truscott

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How does tuning the van der Waals bonding strength affect adsorbate structure?

Maier

Xavier

Truscott

et al. 2022

Phys. Chem. Chem. Phys.

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“…[24] As recently reported for Ru(0001), intermediate porous phases constituted by dehydrogenated borazine might exist during hBN synthesis. [25] Furthermore, considerable organic synthesis efforts gave access to a variety of borazine derivatives, [4,26] covering structures ranging from halogenated borazines [27] to complex functionalized borazines. [28][29][30] These serve as versatile building blocks, integrating the (BN) 3 ring into carbon scaffolds.…”

Section: Introductionmentioning

confidence: 99%

“…[ 24 ] As recently reported for Ru(0001), intermediate porous phases constituted by dehydrogenated borazine might exist during h BN synthesis. [ 25 ]…”

Section: Introductionmentioning

confidence: 99%

Adsorption, Single‐Molecule Manipulation, and Self‐Assembly of Borazine on Ag(111)

Weiss,

Baklanov,

Michelitsch

et al. 2023

Adv Materials Inter

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The interaction of borazine with metal supports and the concomitant surface chemistry play important roles in the synthesis of hexagonal boron nitride and the assembly of BN‐doped carbon nanostructures, thus making adsorbed borazine an intriguing model system. Herein, the first real space characterization of individual borazine molecules and highly ordered borazine self‐assemblies on solid supports, combining scanning tunneling microscopy (STM), scanning tunneling spectroscopy, X‐ray photoelectron spectroscopy, and complementary density functional theory modeling is reported. Specifically, a weak, nondissociative adsorption of borazine with the ring aligned in parallel to the surface plane is observed on Ag(111) upon low temperature deposition. Borazine is found to favor hollow adsorption sites, which guide the assembly of intricate borazine assemblies including a porous, chiral honeycomb‐like network, and dense‐packed monolayer films. Additionally, a modification of the borazine adsorption configuration by STM‐based manipulation is demonstrated. Dehydrogenation of individual molecules by voltages pulses yields an upright standing borazine fragment bound via B to Ag. This study thus provides a comprehensive, single‐molecule level characterization of borazine adsorption and surface chemistry on a characteristic coinage metal support and may serve as a reference for advanced low‐dimensional materials based on functionalized borazines or including BN units as dopants.

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“…Still, the high cost of organic solvent and the damage to the lateral size of BNNS inhibit its application. Additionally, the chemical vapor deposition method − can deposit the high-quality BNNS on the surfaces of substrates using two or more precursors. However, the application of this method is not ideal due to the complex operation and low yield.…”

Section: Introductionmentioning

confidence: 99%

Angular-Shaped Boron Nitride Nanosheets with a High Aspect Ratio to Improve the Out-of-Plane Thermal Conductivity of Polyimide Composite Films

et al. 2022

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Polyimide/boron nitride nanosheet (PI/BNNS) composite films have potential applications in the field of electrical devices due to the superior thermal conductivity and outstanding insulating properties of the boron nitride nanosheet. In this study, the boron nitride nanosheet (BNNS-t) was prepared by the template method using sodium chloride as the template, and B 2 O 3 and flowing ammonia as the boron and nitrogen sources, respectively. Then, the PI/ BNNS-t composite films were investigated with different loading of BNNS-t as thermally conductive fillers. The results show that BNNS-t has a high aspect ratio and a uniform lateral dimension, with a large dimension and a thin thickness, and there are a few nanosheets with angular shapes in the as-obtained BNNS-t. The synergistic effect of the above characteristics for BNNS-t is beneficial to constructing the three-dimensional heat conduction network of the PI/BNNS-t composite films, which can significantly improve the out-of-plane thermal conduction properties. And then, the out-of-plane thermal conductivity of the PI/BNNS-t composite film achieves 0.67 W m −1 K −1 at 40% loading, which is nearly 3.5 times that of the PI film.

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Evolution of ordered nanoporous phases during h-BN growth: controlling the route from gas-phase precursor to 2D material by in situ monitoring

Abstract: Large-area single-crystal monolayers of two-dimensional (2D) materials such as graphene and hexagonal boron nitride (h-BN) can be grown by chemical vapour deposition (CVD). However, the high temperatures and fast timescales...

Cited by 6 publications

References 75 publications

How does tuning the van der Waals bonding strength affect adsorbate structure?

How does tuning the van der Waals bonding strength affect adsorbate structure?

Adsorption, Single‐Molecule Manipulation, and Self‐Assembly of Borazine on Ag(111)

Angular-Shaped Boron Nitride Nanosheets with a High Aspect Ratio to Improve the Out-of-Plane Thermal Conductivity of Polyimide Composite Films

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