Precise Identification of Graphene’s Crystal Structures by Removable Nanowire Epitaxy

Kim, Jonghyeok; Lim, Ki-Taek; Lee, Yangjin; Kim, Jong-In; Kim, Kihwan; Park, Jungwon; Kim, Kwanpyo; Lee, Won Chul

doi:10.1021/acs.jpclett.7b00279

Cited by 12 publications

(18 citation statements)

References 42 publications

(79 reference statements)

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“…For in-situ imaging of crystal nucleation, we prepared single-layered graphene support films on which gold(I) cyanide (AuCN) nanoribbons were synthesized (fig. S2) (19,20). The electron beam acted as an imaging source as well as a reducing agent to decompose AuCN nanoribbons (about 2 -5 nm thick) to zerovalent Au atoms and (CN) 2 gas (19,21).…”

Section: Main Text (2528 Words)mentioning

confidence: 99%

Reversible disorder-order transitions in atomic crystal nucleation

Jeon

Heo

Hwang

et al. 2021

Science

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147

128

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Nucleation in atomic crystallization remains poorly understood, despite advances in classical nucleation theory. The nucleation process has been described to involve a nonclassical mechanism that includes a spontaneous transition from disordered to crystalline states, but a detailed understanding of dynamics requires further investigation. In situ electron microscopy of heterogeneous nucleation of individual gold nanocrystals with millisecond temporal resolution shows that the early stage of atomic crystallization proceeds through dynamic structural fluctuations between disordered and crystalline states, rather than through a single irreversible transition. Our experimental and theoretical analyses support the idea that structural fluctuations originate from size-dependent thermodynamic stability of the two states in atomic clusters. These findings, based on dynamics in a real atomic system, reshape and improve our understanding of nucleation mechanisms in atomic crystallization.

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Section: Main Text (2528 Words)mentioning

confidence: 99%

Reversible disorder-order transitions in atomic crystal nucleation

Jeon

Heo

Hwang

et al. 2021

Science

Self Cite

147

128

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“…After the fabrication of the Au electrode, the non-irradiated region of the AuCN layer remains on the substrate, but these residuals can be easily wet-etched using ammonia solution. Due to the good solubility of AuCN in the ammonia solution [ 18 , 19 , 20 ] and the volatility of the ammonia solution, this AuCN solution can be recycled after the etching procedure as the drop-casting solution to minimize the material waste [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…Following these facile and on-demand fabrication trends, we devised transformative gold patterning through selective laser refining of gold cyanide (AuCN). The AuCN, the first product of the cyanidation process, can be easily transformed into Au as well as desolved in aqueous solutions of strong bases [ 17 , 18 , 19 , 20 , 21 , 22 ]. Based on these characteristics, we provide a facile fabrication method for Au micropatterns directly from AuCN without separate synthesis steps, derived from the laser-induced in situ refinement and alignment ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

A Transformative Gold Patterning through Selective Laser Refining of Cyanide

et al. 2021

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Gold is an essential noble metal for electronics, and its application area is increasing continuously through the introduction of gold nanoparticle ink that enables rapid prototyping and direct writing of gold electrodes on versatile substrates at a low temperature. However, the synthesis of gold nanoparticles has certain limitations involving high cost, long synthesis time, large waste of material, and frequent use of chemicals. In this study, we suggest simultaneous laser refining of gold cyanide and selective fabrication of gold electrodes directly on the substrate without a separate synthesis step. Gold cyanide is commonly the first product of gold from the primitive ore, and the gold can be extracted directly from the rapid photothermal decomposition of gold cyanide by the laser. It was confirmed that laser-induced thermocapillary force plays an important role in creating the continuous gold patterns by aligning the refined gold. The resultant gold electrodes exhibited a low resistivity analogous to the conventional direct writing method using nanoparticles, and the facile repair process of a damaged electrode was demonstrated as the proof-of-concept. The proposed transformative approach for gold patterning, distinguished from the previous top-down and bottom-up approaches, has the potential to replace the well-known techniques and provide a new branch of electrode manufacturing scheme.

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“…2D vdW layered materials have been extensively studied as the substrate for epitaxy growth [101][102][103][104][105][106][107]. Their chemically inert and dangling-bond-free surface also enable 1D atomic crystals to be easily integrated via weak vdW interaction [108][109][110][111][112][113][114][115][116][117][118][119][120].…”

Section: Sequent Growthmentioning

confidence: 99%

Van der Waals heterostructures with one-dimensional atomic crystals

Qin

Wang

Zhen

et al. 2021

Progress in Materials Science

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As one of the well-defined classes of materials, one-dimensional (1D) materials and related heterostructures have aroused broad interest due to their unique physical properties and widespread applications over the past decades. The concept of van der Waals (vdW) heterostructure, which has gained great success in superlattice of 2D layered materials, can be also extended to heterostructures with 1D atomic crystals. Due to the less rigid requirement on lattice matching, versatility of foreign materials with different dimensionalities can be integrated with the 1D templates via non-covalent bonding. Such 1D vdW heterostructures are expected to exhibit intriguing physical properties and functionalities that cannot be realized in single-component 1D material.This review article aims to provide a succinct and critical survey of the emerging 1D vdW heterostructures. We start with an overview of the configuration and summarize the synthetic strategies of 1D vdW heterostructures. Next, we discuss their physical properties with emphasis on those originated from the unique structure-property relationship, including spatial confinement effect and phase transition, band structure and electrical properties, optical properties, thermal properties and environmental stability, and directional mass transport. The emerging applications of 1D vdW heterostructures in electronic, photonic, optoelectronic and energy storage fields are comprehensively overviewed. Last, we conclude with a brief perspective on the opportunities as well as challenges of vdW heterostructures with 1D atomic crystals.

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Precise Identification of Graphene’s Crystal Structures by Removable Nanowire Epitaxy

Cited by 12 publications

References 42 publications

Reversible disorder-order transitions in atomic crystal nucleation

Reversible disorder-order transitions in atomic crystal nucleation

A Transformative Gold Patterning through Selective Laser Refining of Cyanide

Van der Waals heterostructures with one-dimensional atomic crystals

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