David Turnbull Lectureship
Conferences should include sessions about failed experiments

Symposium NM05: Challenges and Opportunities in Solution Synthesis of Functional Nanomaterials

Jisun Im, University of Nottingham

Surface and Interface Controlled Zero-Dimensional Nanomaterials for Advanced Printed Electronics

Written by Rosemary Calabro

Additive manufacturing is a promising technique to achieve complex three-dimensional structures for applications including flexible and wearable electronics, optoelectronics, and sensors. Conductive inks composed of nanoparticles are promising for additive manufacturing but present challenges because they usually require sintering which can cause cracks in the printed material. Jisun Im presented work aiming to improve gold nanoparticle printing techniques. Gold is an excellent alternative to copper and silver inks because it is very stable and has a high chemical stability. Im presented some strategies she implemented that improve the joining of the nanoparticles, reduced the amount of microcracks, lowered the activation energy for sintering, and increased the conductivity. These included adding small molecules to join the particles together, using ligands that could be photocleaved with ultraviolet light, and using polymer–nanoparticle composites. This talk highlighted the interesting shapes and designs that can be achieved using additive manufacturing while addressing current challenges that affect the performance of conductive inks.  

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