Critical behaviour of the contact angle within nonwetting gaps.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F24%3A00582854" target="_blank" >RIV/67985858:_____/24:00582854 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/24:43930474

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-648X/ad20a3/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-648X/ad20a3/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-648X/ad20a3" target="_blank" >10.1088/1361-648X/ad20a3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Critical behaviour of the contact angle within nonwetting gaps.

Popis výsledku v původním jazyce

Recent density functional theory and simulation studies of fluid adsorption near planar walls in systems where the wall–fluid and fluid–fluid interactions have different ranges, have shown that critical point wetting may not occur and instead nonwetting gaps appear in the surface phase diagram, separating lines of wetting and drying transitions, that extend up to the critical temperature Tc. Here we clarify the features of the surface phase diagrams that are common, regardless of the range and balance of the forces, showing, in particular, that the lines of temperature driven wetting and drying transitions, as well as lines of constant contact angle $pigtthetagt 0$, always converge to an ordinary surface phase transition at Tc. When nonwetting gaps appear the contact angle either vanishes or tends to π as $tequiv(T_c-T)/T_cto 0$. More specifically, when the wall–fluid interaction is long-ranged (dispersion-like) and the fluid–fluid short-ranged we estimate $pi-thetapropto t^{0.16}$, compared with $thetapropto t^{0.77}$ when the wall–fluid interaction is short-ranged and the fluid–fluid dispersion-like, allowing for the effects of bulk critical fluctuations. The universal convergence of the lines of constant contact angle implies that critical point filling always occurs for fluids adsorbed in wedges.

Název v anglickém jazyce

Critical behaviour of the contact angle within nonwetting gaps.

Popis výsledku anglicky

Recent density functional theory and simulation studies of fluid adsorption near planar walls in systems where the wall–fluid and fluid–fluid interactions have different ranges, have shown that critical point wetting may not occur and instead nonwetting gaps appear in the surface phase diagram, separating lines of wetting and drying transitions, that extend up to the critical temperature Tc. Here we clarify the features of the surface phase diagrams that are common, regardless of the range and balance of the forces, showing, in particular, that the lines of temperature driven wetting and drying transitions, as well as lines of constant contact angle $pigtthetagt 0$, always converge to an ordinary surface phase transition at Tc. When nonwetting gaps appear the contact angle either vanishes or tends to π as $tequiv(T_c-T)/T_cto 0$. More specifically, when the wall–fluid interaction is long-ranged (dispersion-like) and the fluid–fluid short-ranged we estimate $pi-thetapropto t^{0.16}$, compared with $thetapropto t^{0.77}$ when the wall–fluid interaction is short-ranged and the fluid–fluid dispersion-like, allowing for the effects of bulk critical fluctuations. The universal convergence of the lines of constant contact angle implies that critical point filling always occurs for fluids adsorbed in wedges.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA21-27338S" target="_blank" >GA21-27338S: Kapacitní deionizace: Porozumění pomocí molekulárního modelování</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics-Condensed Matter

ISSN

0953-8984

e-ISSN

1361-648X

Svazek periodika

36

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

17LT01

Kód UT WoS článku

001152972200001

EID výsledku v databázi Scopus

2-s2.0-85183959694