Stable, one-dimensional suspended and supported monatomic chains of pnictogens: a metal–insulator framework

Ersan, Fatih; Aktürk, Ethem; Çiraci, S.

doi:10.1039/c9cp02474c

Cited by 10 publications

(5 citation statements)

References 80 publications

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“…Furthermore, it has been pointed out that the confined phosphorus and arsenic materials could be used for making P 4 and As 4 , respectively, available for chemical reactions. ,,,− Whether longer chain segments can be recovered intact from inside the SWCNTs using appropriate solvents is another open question. A recent computational study has suggested that the one-dimensional pnictogen zigzag chains may be stable when supported by a substrate . Finally, as we have shown here, moving toward larger-diameter SWCNTs opens a door to ever more complex pnictogen materials.…”

Section: Discussionsupporting

confidence: 64%

“…A recent computational study has suggested that the one-dimensional pnictogen zig-zag chains may be stable when supported by a substrate. 75 Finally, as we have shown here, moving towards larger diameter SWCNTs opens a door to ever more complex pnictogen materials. Exploring their structures and physical properties in detail will be an exciting future challenge.…”

Section: Computational Energies and Bandgaps Of The One-dimensional Pmentioning

confidence: 56%

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One-Dimensional Pnictogen Allotropes inside Single-Wall Carbon Nanotubes

et al. 2019

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The discovery of phosphorene, a single layer of black phosphorus, has accelerated the investigation of pnictogen nanomaterials, leading to the recent identification of arsenene and antimonene. These two-dimensional nanomaterials display physical properties superior to graphene for some applications. Recently, single-wall carbon nanotubes (SWCNTs) have been filled with P4 molecules from the melt and As4 molecules from the vapor phase. Confined within SWCNTs, polymerization reactions yielded new one-dimensional pnictogen allotropes. Here, we show using high-resolution electron microscopy that such nanostructures can also be observed upon filling SWCNTs from the vapor phase using red phosphorus as the source material. Using larger diameter SWCNTs, the vapor phase favors the formation of double-stranded phosphorus zigzag ladders observed here for the first time. Overall, however, SWCNTs were generally found to fill more efficiently with liquid phosphorus; substantial decreases in the filling yields were observed for both phosphorus and arsenic filling of narrow SWCNTs using the vapor route. Attempts to extend the pnitogen series, using molten antimony gave very low filling yields. However, the antimony zigzag ladder was observed on two occasions suggesting that this structural motif dominates across the pnictogens. Computational predictions of the encapsulation energies of the various pnictogen nanostructures are consistent with the observed experimental trends and band gap calculations predict that the single-stranded zigzag chains of all investigated pnictogens are fully metallic. Using SWCNTs with diameters greater than 1.5 nm displayed a plethora of complex new phosphorus nanostructures which highlights an exciting new avenue for future work in this area.

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Section: Discussionsupporting

confidence: 64%

Section: Computational Energies and Bandgaps Of The One-dimensional Pmentioning

confidence: 56%

One-Dimensional Pnictogen Allotropes inside Single-Wall Carbon Nanotubes

et al. 2019

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“…Several studies have demonstrated the advantage of a 3D-printed fracture model over CT imaging alone for the diagnosis of complex fractures [ 40 , 41 ]. This study showed, that the implementation of point of care 3D-printing may provide additional value when compared to the sole use of conventional imaging modalities.…”

Section: Discussionmentioning

confidence: 99%

The influence of 3D printing on inter- and intrarater reliability on the classification of tibial plateau fractures

Dust

Hartel

Henneberg

et al. 2022

Eur J Trauma Emerg Surg

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Purpose Tibial plateau fractures continue to be a challenging task in clinical practice and current outcomes seem to provide the potential for further improvement. Especially presurgical understanding of the orientation of fracture lines and fracture severity is an essential key to sufficient surgical treatment. The object of this study was to evaluate the reliability of modern axial CT-based classification systems for tibial plateau fractures. In addition, the diagnostic-added value of 3D printing on the classification systems was investigated. Methods 22 raters were asked to classify 22 tibial plateau fractures (11 AO B- and 11 AO C-fractures) with the AO, the 10-Segment and the Revisited Schatzker classification in a three-step evaluation: first only using CT scans, second with 3D volumetric reconstructions and last with 3D-printed fracture models. Inter- and intraobserver agreement and the subjective certainty were analyzed. Statistics were done using kappa values, percentage match and a univariant one-way analysis of variance. Results The AO classifications interobserver percentage match and kappa values improved for all raters and recorded an overall value of 0.34, respectively, 43% for the 3D print. The 10-Segment classification interobserver agreement also improved with the 3D-printed models and scored an overall kappa value of 0.18 and a percentage match of 79%. Equally the Revisited Schatzker classification increased its values to 0.31 and 35%. The intraobserver agreement showed a moderate agreement for the AO (0.44) and Revisited Schatzker classification (0.42) whereas the 10-Segment classification showed a fair agreement (0.27). Additionally, the raters changed their classification in 36% of the cases after evaluating the fracture with the 3D-printed models and the subjective certainty regarding the decisions improved as categories of self-reliant diagnostic choices were selected 18% (p < 0.05) more often after using the 3D-printed models. Conclusion Based on the measured outcomes it was concluded that the new classification systems show an overall slight to fair reliability and the use of 3D printing proved to be beneficial for the preoperative diagnostics of tibial plateau fractures. The 10-Segment classification system showed the highest percentage match evaluation of all classification systems demonstrating its high clinical value across all levels of user experience.

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“…A theoretical calculation first predicted the existence of true 1D phosphorene atomic chains [28]. In spite that the fabrication of the narrowest nanostructures of BP from 2D materials can be quite a challenge, there are several experiments that have successfully grown 1D atomic chains using various advanced techniques [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Tuning of excitons in phosphorene atomic chains

Huang,

Zhong,

Sheng

et al. 2023

J. Phys.: Condens. Matter

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An universal scaling between exciton binding energy and band gap was ﬁrst discovered in two-dimensional semiconductors such as graphene derivatives, various TMDs, and black phosphorus [ PRL 115, 066403 (2015); 118, 266401 (2017) ], and later extended to quasi one-dimensional systems such as carbon nanotubes and graphene nanoribbons. In this work we study the excitonic states in phosphorene atomic chains by using the exact diagonalization method and show that the linear scaling between the exciton binding energy (Ex) and quasiparticle shift (∆qs) can be easily tuned by the dielectric environment. In the presence of weak screening, Ex is seen to increase with ∆qs and exhibits a similar scaling as those 2D materials. As the screening becomes stronger, however, the dependence is found to be reversed, i.e., Ex now decreases when ∆qs increases. More interestingly, we also reveal that Ex may even become nearly constant, independent on the system dimension and ∆qs when the screening reaches a certain strength. These abnormal scaling relations are attributed to the complex nature of excitons in the strongly correlated one-dimensional system.

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Stable, one-dimensional suspended and supported monatomic chains of pnictogens: a metal–insulator framework

Abstract: Group-VA elements P, As, Sb, and Bi can construct free-standing, stable zigzag monatomic chain structures, which show unusual properties.

Cited by 10 publications

References 80 publications

One-Dimensional Pnictogen Allotropes inside Single-Wall Carbon Nanotubes

One-Dimensional Pnictogen Allotropes inside Single-Wall Carbon Nanotubes

The influence of 3D printing on inter- and intrarater reliability on the classification of tibial plateau fractures

Tuning of excitons in phosphorene atomic chains

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