Self-organization of vapor-deposited polyolefins at the solid/vacuum interface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00540725" target="_blank" >RIV/68378271:_____/20:00540725 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/20:10411357 RIV/49777513:23520/20:43958593

Výsledek na webu

<a href="https://doi.org/10.1016/j.porgcoat.2020.105630" target="_blank" >https://doi.org/10.1016/j.porgcoat.2020.105630</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.porgcoat.2020.105630" target="_blank" >10.1016/j.porgcoat.2020.105630</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Self-organization of vapor-deposited polyolefins at the solid/vacuum interface

Popis výsledku v původním jazyce

Here, solvent-free interactions between polyolefins and silicon substrates are investigated upon their physical vapor deposition under vacuum. Molecular dynamics simulations show that polyolefins unfold upon adsorption and that two macromolecules suffice to produce a stable nucleus. Supersharp probe AFM measurements reveal the formation of 3.5 nm globular clusters that further transform into two-dimensional islands with compact shapes that possess a 3.5 nm thick rim and a 7.0 nm thick center. The islands grow via attachment-limited aggregation by accepting new molecules from the edge, keeping the thickness constant and expanding laterally. Upon longer deposition times, the islands coalesce, whereas their surface smoothens with a growth exponent of γ = -0.33 and a dynamic exponent of 1/z = -0.21. Smoothening is accompanied by crystallization phenomena that result in the formation of orthorhombic polyolefin crystals, as detected by XRD.

Název v anglickém jazyce

Self-organization of vapor-deposited polyolefins at the solid/vacuum interface

Popis výsledku anglicky

Here, solvent-free interactions between polyolefins and silicon substrates are investigated upon their physical vapor deposition under vacuum. Molecular dynamics simulations show that polyolefins unfold upon adsorption and that two macromolecules suffice to produce a stable nucleus. Supersharp probe AFM measurements reveal the formation of 3.5 nm globular clusters that further transform into two-dimensional islands with compact shapes that possess a 3.5 nm thick rim and a 7.0 nm thick center. The islands grow via attachment-limited aggregation by accepting new molecules from the edge, keeping the thickness constant and expanding laterally. Upon longer deposition times, the islands coalesce, whereas their surface smoothens with a growth exponent of γ = -0.33 and a dynamic exponent of 1/z = -0.21. Smoothening is accompanied by crystallization phenomena that result in the formation of orthorhombic polyolefin crystals, as detected by XRD.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Progress in Organic Coatings

ISSN

0300-9440

e-ISSN

—

Svazek periodika

143

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000532797100015

EID výsledku v databázi Scopus

2-s2.0-85081030698