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Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles

We extend a previous study on the influence of nanoparticles on the decay of nanoimprinted polymer film patterns to compare the effects of “bare” silica (SiO(2)) nanoparticles and SiO(2) nanoparticles with grafted polymer layers having the same chemical composition as the polymer matrix. This method...

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Autores principales: Bhadauriya, Sonal, Nallapaneni, Asritha, Wang, Xiaoteng, Zhang, Jianan, Masud, Ali, Bockstaller, Michael R., Al-Enizi, Abdullah M., Stafford, Christopher M., Douglas, Jack F., Karim, Alamgir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419356/
https://www.ncbi.nlm.nih.gov/pubmed/36132626
http://dx.doi.org/10.1039/d1na00206f
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author Bhadauriya, Sonal
Nallapaneni, Asritha
Wang, Xiaoteng
Zhang, Jianan
Masud, Ali
Bockstaller, Michael R.
Al-Enizi, Abdullah M.
Stafford, Christopher M.
Douglas, Jack F.
Karim, Alamgir
author_facet Bhadauriya, Sonal
Nallapaneni, Asritha
Wang, Xiaoteng
Zhang, Jianan
Masud, Ali
Bockstaller, Michael R.
Al-Enizi, Abdullah M.
Stafford, Christopher M.
Douglas, Jack F.
Karim, Alamgir
author_sort Bhadauriya, Sonal
collection PubMed
description We extend a previous study on the influence of nanoparticles on the decay of nanoimprinted polymer film patterns to compare the effects of “bare” silica (SiO(2)) nanoparticles and SiO(2) nanoparticles with grafted polymer layers having the same chemical composition as the polymer matrix. This method involves nanoimprinting substrate-supported polymer films using a pattern replicated from a digital versatile disc (DVD), and then annealing the patterned polymer nanocomposite films at elevated temperatures to follow the decay of the topographic surface pattern with time by atomic force microscopy imaging after quenching. We quantified the relaxation of the pattern height (“slumping”) and determined the relaxation time τ for this pattern decay process as a function of nanoparticle filler type and concentration to determine how nanoparticle additives influence relative film stability. Attractive interactions between the bare nanoparticles and the polymer matrix significantly enhance the thermal resilience of the nanopatterns to decay, compared to those of the particle brushes, wherein the particle core interactions are screened from the matrix via the brush layer. A novel aspect of this method is that it readily lends itself to in situ film relaxation measurements in a manufacturing context. We observe that the relaxation time of the pattern relaxation exhibits entropy–enthalpy compensation in the free energy parameters governing the pattern relaxation process as a function of temperature, irrespective of the NP system used, consistent with our previous experimental and computational studies.
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spelling pubmed-94193562022-09-20 Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles Bhadauriya, Sonal Nallapaneni, Asritha Wang, Xiaoteng Zhang, Jianan Masud, Ali Bockstaller, Michael R. Al-Enizi, Abdullah M. Stafford, Christopher M. Douglas, Jack F. Karim, Alamgir Nanoscale Adv Chemistry We extend a previous study on the influence of nanoparticles on the decay of nanoimprinted polymer film patterns to compare the effects of “bare” silica (SiO(2)) nanoparticles and SiO(2) nanoparticles with grafted polymer layers having the same chemical composition as the polymer matrix. This method involves nanoimprinting substrate-supported polymer films using a pattern replicated from a digital versatile disc (DVD), and then annealing the patterned polymer nanocomposite films at elevated temperatures to follow the decay of the topographic surface pattern with time by atomic force microscopy imaging after quenching. We quantified the relaxation of the pattern height (“slumping”) and determined the relaxation time τ for this pattern decay process as a function of nanoparticle filler type and concentration to determine how nanoparticle additives influence relative film stability. Attractive interactions between the bare nanoparticles and the polymer matrix significantly enhance the thermal resilience of the nanopatterns to decay, compared to those of the particle brushes, wherein the particle core interactions are screened from the matrix via the brush layer. A novel aspect of this method is that it readily lends itself to in situ film relaxation measurements in a manufacturing context. We observe that the relaxation time of the pattern relaxation exhibits entropy–enthalpy compensation in the free energy parameters governing the pattern relaxation process as a function of temperature, irrespective of the NP system used, consistent with our previous experimental and computational studies. RSC 2021-07-19 /pmc/articles/PMC9419356/ /pubmed/36132626 http://dx.doi.org/10.1039/d1na00206f Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Bhadauriya, Sonal
Nallapaneni, Asritha
Wang, Xiaoteng
Zhang, Jianan
Masud, Ali
Bockstaller, Michael R.
Al-Enizi, Abdullah M.
Stafford, Christopher M.
Douglas, Jack F.
Karim, Alamgir
Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title_full Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title_fullStr Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title_full_unstemmed Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title_short Enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
title_sort enhanced resistance to decay of imprinted nanopatterns in thin films by bare nanoparticles compared to polymer-grafted nanoparticles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419356/
https://www.ncbi.nlm.nih.gov/pubmed/36132626
http://dx.doi.org/10.1039/d1na00206f
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