Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics

Gold electrodes are important in some devices and certain applications where an inert, highly conductive feature is required. An aqueous gold nanoparticle (AuNP) ink suitable for inkjet printing was synthesized and formulated using starch and microwave-assisted heating. By varying the hydrolysis con...

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Main Author: Enriquez, Erwin P
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Published: Archīum Ateneo 2018
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Online Access:https://archium.ateneo.edu/chemistry-faculty-pubs/3
https://archium.ateneo.edu/cgi/viewcontent.cgi?article=1002&context=chemistry-faculty-pubs
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spelling ph-ateneo-arc.chemistry-faculty-pubs-10022020-01-23T03:15:49Z Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics Enriquez, Erwin P Gold electrodes are important in some devices and certain applications where an inert, highly conductive feature is required. An aqueous gold nanoparticle (AuNP) ink suitable for inkjet printing was synthesized and formulated using starch and microwave-assisted heating. By varying the hydrolysis conditions of starch, the size, yield, and stability of the AuNP suspension can be controlled and optimized to achieve a jettable ink. The optimized formulation has a very low starch loading of only 1.75 wt% relative to gold forming a highly stable AuNP ink, which upon drying already forms a very conductive film and sinters at low temperature. The overall synthesis protocol thus provides a greener and cheaper alternative to other AuNP synthesis methods. The sintering behavior of the film was monitored wherein upon heating, starch is degraded, crystallite growth increased, and the morphology changed from individual nanoparticles to a network of fused particles. The film sheet resistance decreased concomitant with these physical changes. By heating the film to at least 200 oC, a sheet resistance of < 1.0 Ω/□ is achieved. This aqueous-formulated ink, therefore, offers an alternative to the usual organic solvent ink formulations used in printed electronics. It proved to print conductive films on various substrates for possible applications in flexible electronic devices 2018-01-01T08:00:00Z text application/pdf https://archium.ateneo.edu/chemistry-faculty-pubs/3 https://archium.ateneo.edu/cgi/viewcontent.cgi?article=1002&amp;context=chemistry-faculty-pubs Chemistry Faculty Publications Archīum Ateneo gold nanoparticle starch inkjet printing microwave synthesis green chemistry Biochemistry Chemistry Radiochemistry
institution Ateneo De Manila University
building Ateneo De Manila University Library
country Philippines
collection archium.Ateneo Institutional Repository
topic gold nanoparticle
starch
inkjet printing
microwave synthesis
green chemistry
Biochemistry
Chemistry
Radiochemistry
spellingShingle gold nanoparticle
starch
inkjet printing
microwave synthesis
green chemistry
Biochemistry
Chemistry
Radiochemistry
Enriquez, Erwin P
Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
description Gold electrodes are important in some devices and certain applications where an inert, highly conductive feature is required. An aqueous gold nanoparticle (AuNP) ink suitable for inkjet printing was synthesized and formulated using starch and microwave-assisted heating. By varying the hydrolysis conditions of starch, the size, yield, and stability of the AuNP suspension can be controlled and optimized to achieve a jettable ink. The optimized formulation has a very low starch loading of only 1.75 wt% relative to gold forming a highly stable AuNP ink, which upon drying already forms a very conductive film and sinters at low temperature. The overall synthesis protocol thus provides a greener and cheaper alternative to other AuNP synthesis methods. The sintering behavior of the film was monitored wherein upon heating, starch is degraded, crystallite growth increased, and the morphology changed from individual nanoparticles to a network of fused particles. The film sheet resistance decreased concomitant with these physical changes. By heating the film to at least 200 oC, a sheet resistance of < 1.0 Ω/□ is achieved. This aqueous-formulated ink, therefore, offers an alternative to the usual organic solvent ink formulations used in printed electronics. It proved to print conductive films on various substrates for possible applications in flexible electronic devices
format text
author Enriquez, Erwin P
author_facet Enriquez, Erwin P
author_sort Enriquez, Erwin P
title Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
title_short Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
title_full Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
title_fullStr Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
title_full_unstemmed Controlled Microwave-Hydrolyzed Starch as Stabilizer for Green Formulation of Aqueous Gold-Nanoparticle Ink for Flexible Printed Electronics
title_sort controlled microwave-hydrolyzed starch as stabilizer for green formulation of aqueous gold-nanoparticle ink for flexible printed electronics
publisher Archīum Ateneo
publishDate 2018
url https://archium.ateneo.edu/chemistry-faculty-pubs/3
https://archium.ateneo.edu/cgi/viewcontent.cgi?article=1002&amp;context=chemistry-faculty-pubs
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