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On the self-damping nature of densification in photonic sintering of nanoparticles

Sintering of nanoparticle inks over large area-substrates is a key enabler for scalable fabrication of patterned and continuous films, with multiple emerging applications. The high speed and ambient condition operation of photonic sintering has elicited significant interest for this purpose. In this...

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Autores principales: MacNeill, William, Choi, Chang-Ho, Chang, Chih-Hung, Malhotra, Rajiv
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4595846/
https://www.ncbi.nlm.nih.gov/pubmed/26443492
http://dx.doi.org/10.1038/srep14845
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author MacNeill, William
Choi, Chang-Ho
Chang, Chih-Hung
Malhotra, Rajiv
author_facet MacNeill, William
Choi, Chang-Ho
Chang, Chih-Hung
Malhotra, Rajiv
author_sort MacNeill, William
collection PubMed
description Sintering of nanoparticle inks over large area-substrates is a key enabler for scalable fabrication of patterned and continuous films, with multiple emerging applications. The high speed and ambient condition operation of photonic sintering has elicited significant interest for this purpose. In this work, we experimentally characterize the temperature evolution and densification in photonic sintering of silver nanoparticle inks, as a function of nanoparticle size. It is shown that smaller nanoparticles result in faster densification, with lower temperatures during sintering, as compared to larger nanoparticles. Further, high densification can be achieved even without nanoparticle melting. Electromagnetic Finite Element Analysis of photonic heating is coupled to an analytical sintering model, to examine the role of interparticle neck growth in photonic sintering. It is shown that photonic sintering is an inherently self-damping process, i.e., the progress of densification reduces the magnitude of subsequent photonic heating even before full density is reached. By accounting for this phenomenon, the developed coupled model better captures the experimentally observed sintering temperature and densification as compared to conventional photonic sintering models. Further, this model is used to uncover the reason behind the experimentally observed increase in densification with increasing weight ratio of smaller to larger nanoparticles.
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spelling pubmed-45958462015-10-13 On the self-damping nature of densification in photonic sintering of nanoparticles MacNeill, William Choi, Chang-Ho Chang, Chih-Hung Malhotra, Rajiv Sci Rep Article Sintering of nanoparticle inks over large area-substrates is a key enabler for scalable fabrication of patterned and continuous films, with multiple emerging applications. The high speed and ambient condition operation of photonic sintering has elicited significant interest for this purpose. In this work, we experimentally characterize the temperature evolution and densification in photonic sintering of silver nanoparticle inks, as a function of nanoparticle size. It is shown that smaller nanoparticles result in faster densification, with lower temperatures during sintering, as compared to larger nanoparticles. Further, high densification can be achieved even without nanoparticle melting. Electromagnetic Finite Element Analysis of photonic heating is coupled to an analytical sintering model, to examine the role of interparticle neck growth in photonic sintering. It is shown that photonic sintering is an inherently self-damping process, i.e., the progress of densification reduces the magnitude of subsequent photonic heating even before full density is reached. By accounting for this phenomenon, the developed coupled model better captures the experimentally observed sintering temperature and densification as compared to conventional photonic sintering models. Further, this model is used to uncover the reason behind the experimentally observed increase in densification with increasing weight ratio of smaller to larger nanoparticles. Nature Publishing Group 2015-10-07 /pmc/articles/PMC4595846/ /pubmed/26443492 http://dx.doi.org/10.1038/srep14845 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
MacNeill, William
Choi, Chang-Ho
Chang, Chih-Hung
Malhotra, Rajiv
On the self-damping nature of densification in photonic sintering of nanoparticles
title On the self-damping nature of densification in photonic sintering of nanoparticles
title_full On the self-damping nature of densification in photonic sintering of nanoparticles
title_fullStr On the self-damping nature of densification in photonic sintering of nanoparticles
title_full_unstemmed On the self-damping nature of densification in photonic sintering of nanoparticles
title_short On the self-damping nature of densification in photonic sintering of nanoparticles
title_sort on the self-damping nature of densification in photonic sintering of nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4595846/
https://www.ncbi.nlm.nih.gov/pubmed/26443492
http://dx.doi.org/10.1038/srep14845
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