Wetting on a-C:H coatings decorated with sub-micron structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10403919" target="_blank" >RIV/00216208:11320/19:10403919 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nvLj6IqPN2" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nvLj6IqPN2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2019.03.060" target="_blank" >10.1016/j.surfcoat.2019.03.060</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wetting on a-C:H coatings decorated with sub-micron structures

Popis výsledku v původním jazyce

A novel technique that enables the production of a-C:H coatings decorated either by sub-micron concave or convex structures is presented. The technique is based on several steps that involve i) pre-seeding of substrates with C:H sub-micron particles produced by a gas aggregation cluster source, ii) overcoating of the C:H particles by thin a-C:H coatings produced by plasma enhanced chemical vapor deposition and iii) optional ultrasonic liftoff of the C:H particles. The main focus is set on the characterization of the morphology of the resultant structures as well as on the comparison of their wettability. It is shown that the properties of the structured a-C:H coatings may be precisely controlled by the number of the C:H particles. Different dynamic wetting of convex and concave structures is reported, although static wettability is the same. For concave wells (maximum depth 90 rim) the dynamics of water droplet drying is similar to the one observed on smooth a-C:H films and is characterized by three well-distinguishable phases - the constant contact radius phase, the constant contact angle phase and the mixed phase - independently of the number of wells. By contrast, the increasing number of convex bumps (300 rim in height) gradually impedes the movement of a triple line which progressively suppresses the constant contact angle phase. Subsequently, the differences in the droplet drying have a strong impact on the bovine serum albumin patterns formed after the complete evaporation of droplets. Spatially irregular protein pattern is observed on smooth and well-decorated concave a-C:H coatings while a well-defined &quot;coffee-ring&quot; structure is formed on the a-C:H coatings decorated with convex structures.

Název v anglickém jazyce

Wetting on a-C:H coatings decorated with sub-micron structures

Popis výsledku anglicky

A novel technique that enables the production of a-C:H coatings decorated either by sub-micron concave or convex structures is presented. The technique is based on several steps that involve i) pre-seeding of substrates with C:H sub-micron particles produced by a gas aggregation cluster source, ii) overcoating of the C:H particles by thin a-C:H coatings produced by plasma enhanced chemical vapor deposition and iii) optional ultrasonic liftoff of the C:H particles. The main focus is set on the characterization of the morphology of the resultant structures as well as on the comparison of their wettability. It is shown that the properties of the structured a-C:H coatings may be precisely controlled by the number of the C:H particles. Different dynamic wetting of convex and concave structures is reported, although static wettability is the same. For concave wells (maximum depth 90 rim) the dynamics of water droplet drying is similar to the one observed on smooth a-C:H films and is characterized by three well-distinguishable phases - the constant contact radius phase, the constant contact angle phase and the mixed phase - independently of the number of wells. By contrast, the increasing number of convex bumps (300 rim in height) gradually impedes the movement of a triple line which progressively suppresses the constant contact angle phase. Subsequently, the differences in the droplet drying have a strong impact on the bovine serum albumin patterns formed after the complete evaporation of droplets. Spatially irregular protein pattern is observed on smooth and well-decorated concave a-C:H coatings while a well-defined &quot;coffee-ring&quot; structure is formed on the a-C:H coatings decorated with convex structures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

367

Číslo periodika v rámci svazku

Červen

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

165-172

Kód UT WoS článku

000466253300018

EID výsledku v databázi Scopus

2-s2.0-85063751341