Chemical Vapor Transport Route toward Black Phosphorus Nanobelts and Nanoribbons

Macewicz, Łukasz; Pyrchla, Krzysztof; Bogdanowicz, Robert; Суманасекера, Гамини; Jasiński, Jacek B.

doi:10.1021/acs.jpclett.1c02064

Cited by 12 publications

(10 citation statements)

References 82 publications

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“…However, majority of the widths of the ribbons produced were still in the micron scale. Very recently, Macewicz et al [28] have complimented a chemical vapor transport (CVT) with mechanical exfoliation to produce larger BP nanoribbons and nanobelts that had a length-width ratio in a few hundred range (with width of 1.5 μm and length of 500 μm). Such lager dimensions may limit the active sites available for chemical bonding and modification.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Narrow Phosphorene Nanoribbons Produced by Facile Electrochemical Process

et al. 2022

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Phosphorene nanoribbons (PNRs) have inspired strong research interests to explore their exciting properties that are associated with the unique two-dimensional (2D) structure of phosphorene as well as the additional quantum confinement of the nanoribbon morphology, providing new materials strategy for electronic and optoelectronic applications. Despite several important properties of PNRs, the production of these structures with narrow widths is still a great challenge. Here, a facile and straightforward approach to synthesize PNRs via an electrochemical process that utilize the anisotropic Na + diffusion barrier in black phosphorus (BP) along the [001] zigzag direction against the [100] armchair direction, is reported. The produced PNRs display widths of good uniformity (10.3 ± 3.8 nm) observed by high-resolution transmission electron microscopy, and the suppressed B 2g vibrational mode from Raman spectroscopy results. More interestingly, when used in field-effect transistors, synthesized bundles exhibit the n-type behavior, which is dramatically different from bulk BP flakes which are p-type. This work provides insights into a new synthesis approach of PNRs with confined widths, paving the way toward the development of phosphorene and other highly anisotropic nanoribbon materials for high-quality electronic applications.

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Section: Introductionmentioning

confidence: 99%

Ultra‐Narrow Phosphorene Nanoribbons Produced by Facile Electrochemical Process

et al. 2022

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“…The focus was on the analysis of forces acting perpendicular to the surface on which the nanoribbon is built. This direction of application of an external force is most likely under real conditions since most of the fabricated nanoribbons are grown at the substrate, which is parallel to its layers. ,, Taking into account the low thickness of the layer and the fact that it is partially adhered to the substrate, we only act with force in the direction parallel to its layers. Most of the experiments ,− were carried out focusing only on examining such vertical forces.…”

Section: Resultsmentioning

confidence: 99%

“…This approach is reasonable since nearly all PNRs fabricated thus far are technically nanobelts . Moreover, since the multiple electrooptical properties of PNRs are size-dependent, current progress in the production of PNRs is focused on achieving structures with higher aspect ratios …”

Section: Introductionmentioning

confidence: 99%

Atomic-Scale Finite-Element Modeling of Elastic Mechanical Anisotropy in Finite-Sized Strained Phosphorene Nanoribbons

Pyrchla

Bogdanowicz

2022

J. Phys. Chem. C

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Nanoribbons are crucial nanostructures due to their superior mechanical and electrical properties. This paper is devoted to hybrid studies of the elastic mechanical anisotropy of phosphorene nanoribbons whose edges connect the terminals of devices such as bridges. Fundamental mechanical properties, including Young’s modulus, Poisson’s ratio, and density, were estimated from first-principles calculations for 1-layer, 3-layer, and 6-layer nanoribbons with widths of 10 Å. The data achieved from the ab initio simulations supplied the finite-element model (FEM) of the nanoribbons. The directional coefficients of strain pressure curves were estimated as Young’s effective modulus since the structure is one-dimensional (1D). The modulus values were equal to 85.8, 111.8, and 134 GPa for 6, 3 and 1 layers, respectively. Moreover, the variation in Poisson’s coefficient for the armchair direction was significantly smaller than for the zigzag direction. Monotonic changes in this twist were observed for structures with 3 and 6 layers within the plane along the zigzag axis. The phosphorene nanoribbons subjected to periodic excitation behaved similarly to those subjected to static loading, while their whippiness was inversely proportional to the length. Next, the deflection under static force, resonance frequencies, and response to a variable driving force were calculated.

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“…Indeed, the performance of PNRs fabricated by a two-step method involving chemical vapor transport (CVT) or high-pressure and high-temperature methods and liquid phase exfoliation, can be somewhat degraded by the presence of solvents. [22][23][24][25][26] The two top-down approaches are ineffective for controlling the nanoribbon electronic structure explicitly, and meanwhile they seriously rely on the preparation process of PNRs (like the following liquid phase exfoliation), which limits the critical scalability for many applications. Recently, two down-top routes for the preparation of PNRs were reported.…”

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confidence: 99%