Journal
ACS APPLIED NANO MATERIALS
Volume 1, Issue 3, Pages 1247-1256Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.7b00379
Keywords
gold nanoparticle; starch; inkjet printing; microwave synthesis; green chemistry
Funding
- Commission on Higher Education Philippine-California Advanced Research Institutes (CHED-PCARI)
- SALSA
- UniCat - DFG within the Excellence Initiative
Ask authors/readers for more resources
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 degrees C, a sheet resistance of <1.0 Omega/square is achieved. This aqueous-formulated ink, therefore, offers an alternative to the usual organic solvent ink formulations used in printed electronics. It proved printing of conductive films on various substrates for possible applications in flexible electronic devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available