Sculpturing graphene wrinkle patterns into compliant substrates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00502546" target="_blank" >RIV/61388955:_____/19:00502546 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/19:PU131225 RIV/68378271:_____/19:00502546 RIV/00216208:11310/19:10394079

Výsledek na webu

<a href="http://hdl.handle.net/11104/0294452" target="_blank" >http://hdl.handle.net/11104/0294452</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.carbon.2019.02.041" target="_blank" >10.1016/j.carbon.2019.02.041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sculpturing graphene wrinkle patterns into compliant substrates

Popis výsledku v původním jazyce

In this work we present a fabrication process for sculpturing wrinkled structures into soft polymers by thermal treatment of graphene flakes. This is accomplished by the imposition of a biaxial compressive stress field to the graphene flakes by controlled heating of graphene/polymer composites. The wrinkling patterns (amplitude, wavelength) are linearly related to the thickness of the graphene as in the case of a stiff film deposited on a compliant substrate. The orientation of the wrinkles is controlled by the geometry of the flakes, such as that long and narrow flakes exhibit perfectly parallel wrinkles perpendicular to the longer edge, while more equilateral specimens are wrinkled without any preferred orientation in the flake interior. Kelvin probe measurements showed that this type of wrinkling does not affect the surface potential of the graphene flakes. The universality of the technique is validated by sculpturing two different polymers, using mechanically exfoliated flakes as well as large graphene prepared by chemical vapor deposition. We thus demonstrate that the present approach is an excellent method for patterning the surface of soft matter in a number of applications with nanoscale features of lateral dimensions as low as ∼50 nm.

Název v anglickém jazyce

Sculpturing graphene wrinkle patterns into compliant substrates

Popis výsledku anglicky

In this work we present a fabrication process for sculpturing wrinkled structures into soft polymers by thermal treatment of graphene flakes. This is accomplished by the imposition of a biaxial compressive stress field to the graphene flakes by controlled heating of graphene/polymer composites. The wrinkling patterns (amplitude, wavelength) are linearly related to the thickness of the graphene as in the case of a stiff film deposited on a compliant substrate. The orientation of the wrinkles is controlled by the geometry of the flakes, such as that long and narrow flakes exhibit perfectly parallel wrinkles perpendicular to the longer edge, while more equilateral specimens are wrinkled without any preferred orientation in the flake interior. Kelvin probe measurements showed that this type of wrinkling does not affect the surface potential of the graphene flakes. The universality of the technique is validated by sculpturing two different polymers, using mechanically exfoliated flakes as well as large graphene prepared by chemical vapor deposition. We thus demonstrate that the present approach is an excellent method for patterning the surface of soft matter in a number of applications with nanoscale features of lateral dimensions as low as ∼50 nm.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF16_026%2F0008382" target="_blank" >EF16_026/0008382: Uhlíkové alotropy s racionalizovanými nanorozhraními a nanospoji pro environmentální a biomedicínské aplikace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Carbon

ISSN

0008-6223

e-ISSN

—

Svazek periodika

146

Číslo periodika v rámci svazku

MAY 2019

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

772-778

Kód UT WoS článku

000465408900082

EID výsledku v databázi Scopus

2-s2.0-85062278234