Mechanisms of Interface Cleaning in Heterostructures Made from Polymer‐Contaminated Graphene

Huang, Zhujun; Cuniberto, Edoardo; Park, Suji; Kisslinger, Kim; Wu, Qin; Taniguchi, Takashi; Watanabe, Kenji; Yager, Kevin G.; Shahrjerdi, Davood

doi:10.1002/smll.202201248

Cited by 9 publications

(12 citation statements)

References 59 publications

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“…The investigations on the adhesion mechanics and the spontaneous blistering of the 2D materials are only limited to the rigid and solid substrates [2,11,43,[45][46][47][48][49][50], where the substrate-based instabilities remain absent. The spontaneous blistering of the MLG flakes over a poly(vinyl) alcohol (PVA) substrate has been recently observed through a polymer-curing assisted technique [12], but the elastic-solid based instabilities still remain unexplored in such a system.…”

Section: Introductionmentioning

confidence: 99%

Hoop compression driven instabilities in spontaneously formed multilayer graphene blisters over a polymeric substrate

Pandey¹,

Ahuja²,

Kumar³

2023

Nanotechnology

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The blistering of elastic membranes is prone to elastic-solid as well as substrate-based mechanical instabilities. The solid-based instabilities have been well-explored in the mechanically indented blisters of elastic membranes over the rigid/ solid substrates, but an integrated study illustrating the underlying mechanism for the onset of solid as well as substrate-based instabilities in the spontaneous blistering of a 2D material is still lacking in the literature. In this article, an extensive experimental as well as analytical analysis of the spontaneous blister-formation in the multilayer graphene (MLG) flakes over a polymeric substrate is reported, which elucidates the involved mechanism and the governing parameters behind the development of elastic-solid as well as viscoelastic-substrate based instabilities. Herein, a ‘blister-collapse model’ is proposed, which infers that the suppression of the hoop compression, resulting from the phase-transition of the confined matter, plays a crucial role in the development of the instabilities. The ratio of blister-height to flake-thickness is a direct consequence of the taper-angle of the MLG blisters and the thickness-dependent elasticity of the upper-bounding MLG flakes, which shows a significant impact on the growth-dynamics of the viscous fingering patterns (viscoelastic-substrate based instabilities) under the MLG blisters.

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Section: Introductionmentioning

confidence: 99%

Hoop compression driven instabilities in spontaneously formed multilayer graphene blisters over a polymeric substrate

Pandey¹,

Ahuja²,

Kumar³

2023

Nanotechnology

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“…[19] In addition, a high-resolution cross-section STEM image (Figure 1i) from the red box in (h) reveals a clean interface between graphene and layered hBN, which reduces long-range and short-range scattering in graphene and thus increases carrier mobility. [26,27]…”

Section: Preparation Of Hbn/graphene/hbn Sandwich Structurementioning

confidence: 99%

Extremely High Intrinsic Carrier Mobility and Quantum Hall Effect Of Single Crystalline Graphene Grown on Ge(110)

Guo,

Zhang,

Xue

et al. 2023

Adv Materials Inter

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The successful synthesis of wafer‐scale single crystalline graphene on semiconducting Ge substrate has been considered a significant breakthrough toward the manufacturing of graphene‐based electronic and photonic devices; however, the assumed extremely high electrical mobility has not been found yet due to the lack of an adequate characterization method. Herein, state‐of‐the‐art transfer methods are developed to encapsulate the single crystalline graphene, which is grown on semiconducting Ge(110), in two hexagonal boron nitride (hBN) flakes, then acquire its inherent electrical mobility precisely via edge‐contact technique. It is found that single crystalline graphene grown on Ge(110) possesses a maximum carrier mobility of over 100 000 cm2 V−1 s−1 at low temperatures (2.3 K), which is superior to that obtained from graphene grown on other nonmetal substrates. Due to the extremely high mobility, well‐defined quantum Hall effect and Shubnikov‐de Haas oscillations can be observed at low temperatures as well. The study suggests that the excellent carrier mobility of graphene grown on Ge(110) may open an avenue to develop the practical graphene‐based nanodevices with high performance.

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“…For example, metal activity center, high surface area, and orderly structure, high specificity resistance surface are introduced as vital to the property promotion of heterostructure materials. In addition, other high-surface-area materials, such as graphene, carbon nitride, or layered dihydroxyl oxide, [17,18] have been hybridized to achieve a complementary or synergetic effect. Recently, taking advantage of rolling circle amplification, stevens and coworkers have fabricated heterostructure materials DNA-inorganic hybrid micro/nanostructures with highly loading, enhanced stability, and high surface area properties for biomacromolecules pay loading.…”

Section: Introductionmentioning

confidence: 99%

Virus‐Like Magnetic Heterostructure: an Outstanding Metal‐Complex Active Platform Enables High‐Efficiency Separation and Catalysis

Guo¹,

Zhang²,

He³

et al. 2023

Small

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Assembled heterostructure systems, as emerging functional materials, have broad applications ranging from enzyme and drug payload to catalysis and purification. However, these require trial‐ and ‐error design process and complex experimental environment to generate heterostructure materials. Here, this study describes an easy‐to‐execute strategy to fabricate magnetic heterostructure as multifunctional delivery system. We utilize first‐row transition metal copper and nitroso/amino ligand as modules to assemble around Fe3O4 magnetic nanoparticles by excessed mild stimuli and fabricate the magnetic heterostructure materials (Fe3O4@ TACN NPs (tetraamminecopper (II) nitrate)). Notably, the Fe3O4@ TACN NPs present with cat's‐whisker structure containing ligand and metal center. The nitroso‐group ligands exhibit strong binding affinity to heme‐structure enzyme, ensuring effective capture and isolate of cytochrome C (Cyt‐c), resulting in their excellent isolation property. The copper complex‐powered magnetic heterostructure materials can effectively isolation Cyt‐c from complex biological sample (pork heart). Importantly, the Fe3O4@ TACN NPs coordinated with heme‐structure, induced methionine 80 (Met80) disassociates from heme prosthetic group, and contributed to peroxidase‐like (POD‐like) activities increasing. These results exhibit that copper complex‐powered magnetic heterostructure materials can not only satisfy the Cyt‐c isolation and immobilization in an alkaline medium, but also be of the potential for improving the immobilization enzyme reactor performance.

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Mechanisms of Interface Cleaning in Heterostructures Made from Polymer‐Contaminated Graphene

Cited by 9 publications

References 59 publications

Hoop compression driven instabilities in spontaneously formed multilayer graphene blisters over a polymeric substrate

Hoop compression driven instabilities in spontaneously formed multilayer graphene blisters over a polymeric substrate

Extremely High Intrinsic Carrier Mobility and Quantum Hall Effect Of Single Crystalline Graphene Grown on Ge(110)

Virus‐Like Magnetic Heterostructure: an Outstanding Metal‐Complex Active Platform Enables High‐Efficiency Separation and Catalysis

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