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Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates

In this paper we present the laser nanowelding process of silver nanowires (AgNWs) deposited on flexible polymer substrates by continuous wave (CW) lasers. CW lasers are cost-effective and can provide moderate power density, somewhere between nanosecond pulsed lasers and flash lamps, which is just e...

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Detalles Bibliográficos
Autores principales: Xu, Li, Weng, Wei-Chia, Yeh, Ying-Chin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541505/
https://www.ncbi.nlm.nih.gov/pubmed/34684961
http://dx.doi.org/10.3390/nano11102511
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author Xu, Li
Weng, Wei-Chia
Yeh, Ying-Chin
author_facet Xu, Li
Weng, Wei-Chia
Yeh, Ying-Chin
author_sort Xu, Li
collection PubMed
description In this paper we present the laser nanowelding process of silver nanowires (AgNWs) deposited on flexible polymer substrates by continuous wave (CW) lasers. CW lasers are cost-effective and can provide moderate power density, somewhere between nanosecond pulsed lasers and flash lamps, which is just enough to perform the nanowelding process efficiently and does not damage the nanowires on the polymer substrates. Here, an Nd:YAG CW laser (wavelength 532 nm) was used to perform the nanowelding of AgNWs on polyethylene terephthalate (PET) substrates. Key process parameters such as laser power, scan speed, and number of scans were studied and optimized, and mechanisms of observed phenomena are discussed. Our best result demonstrates a sheet resistance of 12 ohm/squ with a transmittance at λ = 550 nm of 92% for AgNW films on PET substrates. A transparent resistive heater was made, and IR pictures were taken to show the high uniformity of the CW laser nanowelded AgNW film. Our findings show that highly effective and efficient nanowelding can be achieved without the need of expensive pulse lasers or light sources, which may contribute to lower the cost of mass producing AgNWs on flexible substrates.
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spelling pubmed-85415052021-10-24 Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates Xu, Li Weng, Wei-Chia Yeh, Ying-Chin Nanomaterials (Basel) Article In this paper we present the laser nanowelding process of silver nanowires (AgNWs) deposited on flexible polymer substrates by continuous wave (CW) lasers. CW lasers are cost-effective and can provide moderate power density, somewhere between nanosecond pulsed lasers and flash lamps, which is just enough to perform the nanowelding process efficiently and does not damage the nanowires on the polymer substrates. Here, an Nd:YAG CW laser (wavelength 532 nm) was used to perform the nanowelding of AgNWs on polyethylene terephthalate (PET) substrates. Key process parameters such as laser power, scan speed, and number of scans were studied and optimized, and mechanisms of observed phenomena are discussed. Our best result demonstrates a sheet resistance of 12 ohm/squ with a transmittance at λ = 550 nm of 92% for AgNW films on PET substrates. A transparent resistive heater was made, and IR pictures were taken to show the high uniformity of the CW laser nanowelded AgNW film. Our findings show that highly effective and efficient nanowelding can be achieved without the need of expensive pulse lasers or light sources, which may contribute to lower the cost of mass producing AgNWs on flexible substrates. MDPI 2021-09-27 /pmc/articles/PMC8541505/ /pubmed/34684961 http://dx.doi.org/10.3390/nano11102511 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Li
Weng, Wei-Chia
Yeh, Ying-Chin
Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title_full Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title_fullStr Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title_full_unstemmed Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title_short Continuous Wave Laser Nanowelding Process of Ag Nanowires on Flexible Polymer Substrates
title_sort continuous wave laser nanowelding process of ag nanowires on flexible polymer substrates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541505/
https://www.ncbi.nlm.nih.gov/pubmed/34684961
http://dx.doi.org/10.3390/nano11102511
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