AFM and Raman study of graphene deposited on silicon surfaces nanostructured by ion beam irradiation

Dell’Anna, Rossana; Iacob, Erica; Dalton, Alan B.; Böttger, Roman; Pepponi, G.

doi:10.1111/jmi.12908

Cited by 4 publications

(5 citation statements)

References 38 publications

(63 reference statements)

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“…Atomic force microscopy (AFM) images in Figure 1a-c show the typical morphology of graphene-covered textured surfaces referred to as GrP40, GrP125, and GrP250. The preparation and characterization of the textured surface is described in previous work [44,45] and in Section S1 Supporting Information. Each textured region comprises long parallel grooves ≈40 nm wide; the grooves′ spacing referred to pitch length (P) varies from 40 ± 4, 125 ± 8, and 250 ± 14 nm.…”

Section: Resultsmentioning

confidence: 99%

Graphene Confers Ultralow Friction on Nanogear Cogs

Mescola

Paolicelli

Ogilvie

et al. 2021

Small

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Friction‐induced energy dissipation impedes the performance of nanomechanical devices. Nevertheless, the application of graphene is known to modulate frictional dissipation by inducing local strain. This work reports on the nanomechanics of graphene conformed on different textured silicon surfaces that mimic the cogs of a nanoscale gear. The variation in the pitch lengths regulates the strain induced in capped graphene revealed by scanning probe techniques, Raman spectroscopy, and molecular dynamics simulation. The atomistic visualization elucidates asymmetric straining of CC bonds over the corrugated architecture resulting in distinct friction dissipation with respect to the groove axis. Experimental results are reported for strain‐dependent solid lubrication which can be regulated by the corrugation and leads to ultralow frictional forces. The results are applicable for graphene covered corrugated structures with movable components such as nanoelectromechanical systems, nanoscale gears, and robotics.

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Section: Resultsmentioning

confidence: 99%

Graphene Confers Ultralow Friction on Nanogear Cogs

Mescola

Paolicelli

Ogilvie

et al. 2021

Small

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“…The height profile in Figure 3i contains several sharp peaks resulting from graphene wrinkles, whereas the other height profiles in Figure 3j-l are all smoother. The frequency distributions of the vertical distance R z shown in Figure 3m-p are calculated from Figure 3e-h. [40,41] The vertical distance R z is defined as the distance between the chosen data point and the lowest data point in the image. The distribution in Figure 3n-p has a much less broadening compared with the distribution in Figure 3m, which reflects the fact that the specimens shown in Figure 3f-h have smoother surfaces.…”

Section: Resultsmentioning

confidence: 99%

The Fabrication of Wrinkle‐Free Graphene Patterns on Ge(110) Substrate

Wang

Gao

et al. 2021

Physica Status Solidi (b)

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A thermal expansion mismatch is inevitable for graphene grown on various substrates by chemical vapor deposition, which leads to the formation of wrinkles during post-growth cooling. Wrinkles can degrade the superior properties of graphene and increase device-to-device inconsistency. To address this issue, wrinkle-free graphene patterns are grown on Ge(110) substrate with the assistance of 5 Â 10 16 cm À2 Si ion implantation. The experimental data show that the wrinkle-free graphene can grow on unimplanted areas, whereas no graphene is synthesized on Si ion implanted areas. Further research shows that the wrinklefree nature of graphene is closely related to the compressive strain distribution in graphene. The compressive strain in graphene is increased to a significant extent with an increase in the size of graphene patterns. When the compressive strain energy exceeds the wrinkle-formation barrier, wrinkles emerge on the graphene, and the compressive strain decreases as a consequence. This research may help to understand the formation mechanisms of graphene wrinkles and promote the growth of wrinkle-free graphene.

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“…Similar atomic resolution have been also obtained with friction in contact AFM [68]. On the other hand, morphology has been broadly investigated with both AFM and STM and findings have been useful to understand: (1) the evolution of growth processes in organic [69,70], inorganic [71,72], and biological [73][74][75][76][77][78][79][80] structures, for organic structures even in situ and in quasi real time [81,82]; (2) chemical/physical interactions between organic and inorganic matter [83,84]; (3) the aggregation phenomena [85][86][87][88]; (4) effects of chemical [89][90][91][92][93] and physical [94][95][96][97][98][99][100][101][102] processes to modify matter and/or its surface; (5) living organisms [103][104][105]. Morphology and electrical measurements may be also correlated to explain the performances of electronic devices [106][107][108][109][110].…”

Section: Scientific Research Publications and Fundings Of Italian Spm...mentioning

confidence: 99%

Probing Italy: A Scanning Probe Microscopy Storyline

Dinelli

Brucale

Valle

et al. 2023

Micro

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Starting from the late 1980’s, scanning probe microscopy has progressively diffused in Italy until today. In this paper, we provide a brief account of the main historical events and a current picture of the distribution of the active groups. A survey was prepared by LimeSurvey, made of six sections asking for personal and institutional data, human resources, equipment available, fields of interest, research projects, educational/dissemination activities, and two relevant publications in the last six years. It turns out that the Italian community includes more than seventy groups and two companies. It is widely diffused, although mostly concentrated near large academic and research institutions, often in locations where prominent Italian researchers have operated. This community is active in many scientific fields and can produce research of high international quality. It shows a wide competence, as proven by the list of research works published in journals ranked within the top 20% class. The diffusion of SPM microscopes in industry is still sporadic, possibly due to extensive collaborations between the research institutions and industries themselves. The authors hope that this work might be useful to the community and beyond, and that it might stimulate the formation of a more structured network.

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AFM and Raman study of graphene deposited on silicon surfaces nanostructured by ion beam irradiation

Cited by 4 publications

References 38 publications

Graphene Confers Ultralow Friction on Nanogear Cogs

Graphene Confers Ultralow Friction on Nanogear Cogs

The Fabrication of Wrinkle‐Free Graphene Patterns on Ge(110) Substrate

Probing Italy: A Scanning Probe Microscopy Storyline

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