Remarkable difference in structural relaxation dynamics of conventionally prepared bulk glass and vapor-deposited thin films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F24%3A39922014" target="_blank" >RIV/00216275:25310/24:39922014 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.aip.org/aip/jcp/article-abstract/161/7/074507/3308991/Remarkable-difference-in-structural-relaxation?redirectedFrom=fulltext" target="_blank" >https://pubs.aip.org/aip/jcp/article-abstract/161/7/074507/3308991/Remarkable-difference-in-structural-relaxation?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0228778" target="_blank" >10.1063/5.0228778</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Remarkable difference in structural relaxation dynamics of conventionally prepared bulk glass and vapor-deposited thin films

Popis výsledku v původním jazyce

&quot;The structural relaxation dynamics of conventionally prepared bulk glass of N,N &apos;-bis(3-methylphenyl)-N,N &apos;-diphenyl-benzidine (TPD) was measured by differential scanning calorimetry. The calorimetric data were quantitatively described in terms of the Tool-Narayanaswamy-Moynihan (TNM) model. The TNM parameters were evaluated using a combination of linearization and non-linear optimization methodologies: h*/R = 109.5 kK, ln(A/s) = -321, beta = 0.37, x = 0.64. In addition, the TNM phenomenology was used to describe recently reported normalized thickness data of stable and aged thin TPD films measured by ellipsometry. The structural relaxation was found to proceed at a markedly higher rate in these thin films prepared by the physical vapor deposition compared to that of conventional bulk glass. This feature appears to be associated with the significantly narrower distribution of relaxation times (beta congruent to 0.8) observed for stable thin film in &quot;&quot;as-deposited&quot;&quot; form with uniquely dense molecular packing. Interestingly, very similar attributes of the relaxation kinetics were also found in the aged thin film with a previously erased thermal history associated with the deposition.&quot;

Název v anglickém jazyce

Remarkable difference in structural relaxation dynamics of conventionally prepared bulk glass and vapor-deposited thin films

Popis výsledku anglicky

&quot;The structural relaxation dynamics of conventionally prepared bulk glass of N,N &apos;-bis(3-methylphenyl)-N,N &apos;-diphenyl-benzidine (TPD) was measured by differential scanning calorimetry. The calorimetric data were quantitatively described in terms of the Tool-Narayanaswamy-Moynihan (TNM) model. The TNM parameters were evaluated using a combination of linearization and non-linear optimization methodologies: h*/R = 109.5 kK, ln(A/s) = -321, beta = 0.37, x = 0.64. In addition, the TNM phenomenology was used to describe recently reported normalized thickness data of stable and aged thin TPD films measured by ellipsometry. The structural relaxation was found to proceed at a markedly higher rate in these thin films prepared by the physical vapor deposition compared to that of conventional bulk glass. This feature appears to be associated with the significantly narrower distribution of relaxation times (beta congruent to 0.8) observed for stable thin film in &quot;&quot;as-deposited&quot;&quot; form with uniquely dense molecular packing. Interestingly, very similar attributes of the relaxation kinetics were also found in the aged thin film with a previously erased thermal history associated with the deposition.&quot;

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

—

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 Chemical Physics

ISSN

0021-9606

e-ISSN

1089-7690

Svazek periodika

161

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

074507

Kód UT WoS článku

001294541100005

EID výsledku v databázi Scopus

2-s2.0-85201740145