TY - JOUR
T1 - Preparing Copper Nanoparticles and Flexible Copper Conductive Sheets
AU - Hong, Gui Bing
AU - Wang, Jia Fang
AU - Chuang, Kai Jen
AU - Cheng, Hsiu Yueh
AU - Chang, Kai Chau
AU - Ma, Chih Ming
N1 - Funding Information:
investigation and formal analysis, J.-F.W.; resources, G.-B.H.; data curation, J.-F.W.; writing—original draft preparation, J.-F.W., G.-B.H., K.-J.C., and C.-M.M.; writing—review and editing, K.-J.C., H.-Y.C., K.-C.C., G.-B.H., and C.-M.M. All of the authors have read and agreed to the published version of the manuscript. Funding: This research was funded by the Ministry of Science and Technology, Taiwan (grant number Funding: This research was funded by the Ministry of Science and Technology, Taiwan (grant number MOST 109-2221-E-027-074). Institutional Review Board Statement: Not applicable. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: Not applicable. Data Availability Statement: Not applicable. Acknowledgments: The authors thank the Ministry of Science and Technology, Taiwan, for financially Acknowledgments: The authors thank the Ministry of Science and Technology, Taiwan, for financially supporting this research. Conflicts of Interest: The authors declare no conflict of interest. Conflicts of Interest: The authors declare no conflicts of interest.
Publisher Copyright:
© 2022 by the authors.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - Nanotechnology is used in a wide range of fields, including medicine, cosmetics, and new material development, and is one of the most popular technologies in the field of flexible electronic products. For the present work, the chemical reduction method with environmentally friendly reducing agents was used to synthesize copper nanoparticles (CuNPs) with good dispersibility. The CuNPs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and ultraviolet–visible spectrophotometry (UV–vis). After the CuNPs were formed, the solvent, polymers, and additives were added to form copper ink. Finally, the prepared copper inks were applied to flexible polyethylene terephthalate (PET) substrate under low sintering temperature and the effects of sintering time and different concentrations of sintering agent on resistivity were investigated. The results show that the copper nanoparticles synthesized by secondary reduction were smaller, more uniform, and better dispersed than those formed by primary reduction. Ethylene glycol has reducing effects under high temperatures, therefore, the CuNPs formed using the mixed solvent were small and well dispersed. The copper ink was applied on the PET substrate, treated with a formic acid aqueous solution, and sintered at 130 C for 60 min, and its resistivity was about 1.67 X 10-3 W cm. The proposed synthesizing method is expected to have potential applications in the flexible electronic products field.
AB - Nanotechnology is used in a wide range of fields, including medicine, cosmetics, and new material development, and is one of the most popular technologies in the field of flexible electronic products. For the present work, the chemical reduction method with environmentally friendly reducing agents was used to synthesize copper nanoparticles (CuNPs) with good dispersibility. The CuNPs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and ultraviolet–visible spectrophotometry (UV–vis). After the CuNPs were formed, the solvent, polymers, and additives were added to form copper ink. Finally, the prepared copper inks were applied to flexible polyethylene terephthalate (PET) substrate under low sintering temperature and the effects of sintering time and different concentrations of sintering agent on resistivity were investigated. The results show that the copper nanoparticles synthesized by secondary reduction were smaller, more uniform, and better dispersed than those formed by primary reduction. Ethylene glycol has reducing effects under high temperatures, therefore, the CuNPs formed using the mixed solvent were small and well dispersed. The copper ink was applied on the PET substrate, treated with a formic acid aqueous solution, and sintered at 130 C for 60 min, and its resistivity was about 1.67 X 10-3 W cm. The proposed synthesizing method is expected to have potential applications in the flexible electronic products field.
KW - Chemical reduction
KW - Copper ink
KW - Copper nanoparticles
KW - Flexible conductive sheets
UR - http://www.scopus.com/inward/record.url?scp=85123509883&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85123509883&partnerID=8YFLogxK
U2 - 10.3390/nano12030360
DO - 10.3390/nano12030360
M3 - Article
AN - SCOPUS:85123509883
SN - 2079-4991
VL - 12
JO - Nanomaterials
JF - Nanomaterials
IS - 3
M1 - 360
ER -