Self-Assembly of Metal Oxide Nanoparticles in Liquid Metal toward Nucleation Control for Graphene Single-Crystal Arrays

Zeng, Mengqi; Zhang, Qiqi; Gao, Xiaowen; Fu, Lei

doi:10.1016/j.chempr.2017.12.026

Cited by 29 publications

(26 citation statements)

References 29 publications

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“…Therefore, on the one hand, the ultrasmooth surface can effectively suppress nucleation to allow for the large‐sized growth of 2D materials . On the other hand, the fluent surface enables self‐alignment of the grains into highly uniform arrays, which is beneficial for commensurate stitching . Liquid substrates are demonstrated to be extremely effective in fabricating large‐scale and high‐quality 2D materials …”

Section: Vapor‐phase Growth Of High‐quality Wafer‐scale 2d Materialsmentioning

confidence: 99%

“…[90][91][92] On the other hand, the fluent surface enables self-alignment of the grains into highly uniform arrays, which is beneficial for commensurate stitching. 55,[93][94][95][96] Liquid substrates are demonstrated to be extremely effective in fabricating large-scale and high-quality 2D materials. 88,97,98 Fu's group has done a series of studies on the growth behavior of 2D materials on a liquid substrate.…”

Section: Self-collimated Grains On a Liquid Substratementioning

confidence: 99%

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Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

Tong

Liu

Zeng

et al. 2019

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Emerging two‐dimensional (2D) materials have stimulated tremendous scientific and industrial interests due to their diverse and tunable physical, chemical, and mechanical properties. The scalable production of high‐quality wafer‐scale 2D materials has become significantly essential to bring us closer to practical industrial applications, particularly in electronic devices. Vapor‐phase growth provides attractive opportunities for the synthesis of large‐area and high‐quality 2D materials. In this review, we will emphasize vapor‐phase growth strategies from three aspects, including suppressing nucleation, seamless stitching, and evolutionary selection growth. We discuss the general understanding of the related fundamental mechanism and specific parameter optimization from precursors and substrate design to the adjusting of growth parameters (temperature and pressure). Meanwhile, we present other strategies to produce various kinds of wafer‐scale 2D materials. Finally, we conclude the current challenges and future directions in this developing field. This work may inspire researchers to better design routes in the synthesis of wafer‐scale 2D materials with high quality.

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Section: Vapor‐phase Growth Of High‐quality Wafer‐scale 2d Materialsmentioning

confidence: 99%

Section: Self-collimated Grains On a Liquid Substratementioning

confidence: 99%

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

Tong

Liu

Zeng

et al. 2019

InfoMat

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“…Xu et al [29,47] aimed to convey fundamental understandings regarding nanoparticle capture during re-solidification in order to obtain a nanocomposite-dispersed metal bulk, bringing the consideration of the Van der Waals (abbreviated as VDW hereinafter) effect, the Brownian effect, and thermodynamic analysis into the modeling of interactions in the nanocomposite-melt dispersion system. There are also experimental works revealing the VDW [48] and electrostatic interactions [49][50][51] among inorganic nanocomposites in the liquid metal. Nevertheless, those works disregard the influence of the driving effect from the melt flow dynamics when describing the nanocomposite-liquid/molten metal dispersion as well as the inter-particle interactions.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Tracing during Laser Powder Bed Fusion of Oxide Dispersion Strengthened Steels

et al. 2021

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The control of nanoparticle agglomeration during the fabrication of oxide dispersion strengthened steels is a key factor in maximizing their mechanical and high temperature reinforcement properties. However, the characterization of the nanoparticle evolution during processing represents a challenge due to the lack of experimental methodologies that allow in situ evaluation during laser powder bed fusion (LPBF) of nanoparticle-additivated steel powders. To address this problem, a simulation scheme is proposed to trace the drift and the interactions of the nanoparticles in the melt pool by joint heat-melt-microstructure–coupled phase-field simulation with nanoparticle kinematics. Van der Waals attraction and electrostatic repulsion with screened-Coulomb potential are explicitly employed to model the interactions with assumptions made based on reported experimental evidence. Numerical simulations have been conducted for LPBF of oxide nanoparticle-additivated PM2000 powder considering various factors, including the nanoparticle composition and size distribution. The obtained results provide a statistical and graphical demonstration of the temporal and spatial variations of the traced nanoparticles, showing ∼55% of the nanoparticles within the generated grains, and a smaller fraction of ∼30% in the pores, ∼13% on the surface, and ∼2% on the grain boundaries. To prove the methodology and compare it with experimental observations, the simulations are performed for LPBF of a 0.005 wt % yttrium oxide nanoparticle-additivated PM2000 powder and the final degree of nanoparticle agglomeration and distribution are analyzed with respect to a series of geometric and material parameters.

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“…Atomic‐scale structural modification can be one of the most effective ways to achieve the controllable property modulation. Different atomic‐scale structures (ASSs) can be naturally or intentionally formed along with the alteration of atomic configurations of as‐obtained 2D materials, owing to the thermal motion and lattice growth kinetics. The appearance of the special structures can tune the electrical, optical, or magnetic properties of 2D materials due to the transformation of electronic structures, and it can also provide opportunities for new discoveries on the mechanism of 2D material synthesis.…”

Section: Introductionmentioning

confidence: 99%

Atomic‐Scale Structural Modification of 2D Materials

et al. 2019

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2D materials have attracted much attention since the discovery of graphene in 2004. Due to their unique electrical, optical, and magnetic properties, they have potential for various applications such as electronics and optoelectronics. Owing to thermal motion and lattice growth kinetics, different atomic‐scale structures (ASSs) can originate from natural or intentional regulation of 2D material atomic configurations. The transformations of ASSs can result in the variation of the charge density, electronic density of state and lattice symmetry so that the property tuning of 2D materials can be achieved and the functional devices can be constructed. Here, several kinds of ASSs of 2D materials are introduced, including grain boundaries, atomic defects, edge structures, and stacking arrangements. The design strategies of these structures are also summarized, especially for atomic defects and edge structures. Moreover, toward multifunctional integration of applications, the modulation of electrical, optical, and magnetic properties based on atomic‐scale structural modification are presented. Finally, challenges and outlooks are featured in the aspects of controllable structure design and accurate property tuning for 2D materials with ASSs. This work may promote research on the atomic‐scale structural modification of 2D materials toward functional applications.

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Self-Assembly of Metal Oxide Nanoparticles in Liquid Metal toward Nucleation Control for Graphene Single-Crystal Arrays

Cited by 29 publications

References 29 publications

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

Nanoparticle Tracing during Laser Powder Bed Fusion of Oxide Dispersion Strengthened Steels

Atomic‐Scale Structural Modification of 2D Materials

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