2016
DOI: 10.1038/srep25653
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Surface stress of graphene layers supported on soft substrate

Abstract: We obtain the surface stress of a single layer and multilayers of graphene supported on silicone substrates by measuring the deformation of the graphene-covered substrates induced by the surface tension of liquid droplets together with the Neumann’s triangle concept. We find that the surface stress of the graphene-covered substrate is significant larger than that of the bare substrate, and it increases with increasing graphene layers, and finally reaches a constant value of about 120 mN/m on three and more lay… Show more

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Cited by 6 publications
(7 citation statements)
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“…This indicates that pinning is occurred at the edge of the droplet. This is attributed to that the graphene is bent out of the graphene plane at the triple point of graphene, liquid, and air due to the relatively high surface tension at the triple point …”
Section: Resultsmentioning
confidence: 99%
See 2 more Smart Citations
“…This indicates that pinning is occurred at the edge of the droplet. This is attributed to that the graphene is bent out of the graphene plane at the triple point of graphene, liquid, and air due to the relatively high surface tension at the triple point …”
Section: Resultsmentioning
confidence: 99%
“…With increasing the bias voltage with time, the permeated tiny liquid droplets (graphene blisters) spread and are merged underneath the graphene. This develops a significant stress at the graphene blisters and causes to initiate the fracture of the graphene at the weakest bonding sites such as pentagon-hexagon bonding sites or impurity sites. ,, This study shows that the intercalation of water under graphene at the triple point is effectively controlled by applying a bias voltage. And at the same time, physical or chemical modification (oxidation) can be occurred according to the bias polarity.…”
Section: Introductionmentioning
confidence: 85%
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“…The deformation of the soft material was observed in the previous study. [45] The contact angle relative to the horizon at the pinning of the micropillar can be considered as the summation of the advancing contact angle for the smooth surface and the 90° as shown in Figure 8b. For that, we should assume that the liquid-solid interface is pinned at the sidewall of the micropillar.…”
Section: Discussionmentioning
confidence: 99%
“…[15][16][17][18][19][20][21][22][23][24] To date, the study on wetting transparency has primarily focused on the wetting behavior of graphene on solid substrates. [8,7,9,15,22,25] Nevertheless, from the viewpoint of applications, it is even more appealing when the substrate is a liquid instead of a solid. By flowing different liquids underneath the graphene, the wettability of the graphene can be tuned in real time, which is highly desirable in many applications, for example, water harvesting [26] and multifunctional droplet microfluidic devices.…”
Section: Introductionmentioning
confidence: 99%