| 1. |
- Schuppert, Anna, et al.
(författare)
-
Ink jet printing of conductive silver tracks from nanoparticle inks on mesoporous substrates
- 2011
-
Ingår i: Digital fabrication 2011, NIP27 27th international conference on digital printing technologies. - 9780892082964 ; , s. -440
-
Konferensbidrag (refereegranskat)abstract
- Conductive tracks are produced by ink jet printing of a commercial silver nanoparticle ink on different substrates. We observed that applying mesoporous coatings on the substrates resulted in metallic conductivity immediately after printing. The influence of the average pore size and some chemical parameters of the coatings were studied, as well as the thermal treatment after printing. We found that using substrates with slightly acidic cationic coating and small pore sizes of about 15 nm resulted in the highest conductivity for the given ink even without any thermal treatment applied. Another crucial parameter found was the smoothness of the surface, which was estimated by the surface gloss. After drying / "sintering" of the printed tracks for 9 min at 100°C in an oven a specific resistance of 13 μΩ·cm (about eightfold that of bulk silver) could be achieved using a commercially available substrate. This is a significant higher value than recently reported conductivities obtained after heating to much higher temperatures. Additionally, some chemical post treatment of the prints by aqueous solutions can be applied for a further increase in conductivity. Furthermore, samples produced were exposed to "photonic sintering" equipment to assess the potential of this technique for inline post-processing of metallic structures on porous substrates.
|
|
| 2. |
- Öhlund, Thomas, et al.
(författare)
-
Assisted sintering of silver nanoparticle inkjet inks on paper with active coatings
- 2015
-
Ingår i: RSC Advances. - : Royal Society of Chemistry (RSC). - 2046-2069. ; 5, s. 64841-64849
-
Tidskriftsartikel (refereegranskat)abstract
- Inkjet-printed metal films are important within the emerging field of printed electronics. For large-scale manufacturing, low-cost flexible substrates and low temperature sintering is desired. Tailored coated substrates are interesting for roll-to-roll fabrication of printed electronics, since a suitable tailoring of the ink-substrate system may reduce, or remove, the need for explicit sintering. Here we utilize specially designed coated papers, containing chloride as an active sintering agent. The built-in sintering agent greatly assists low-temperature sintering of inkjet-printed AgNP films. Further, we examine the effect of variations in coating pore size and precoating type. Interestingly, we find that the sintering is substantially affected by these parameters.
|
|
| 3. |
- Öhlund, Thomas, et al.
(författare)
-
Inkjet Fabrication of Copper Patterns for Flexible Electronics : Using Paper with Active Precoatings
- 2015
-
Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 7:33, s. 18273-18282
-
Tidskriftsartikel (refereegranskat)abstract
- Low-cost solution-processing of highly conductive films is important for the expanding market of printed electronics. For roll-to-roll manufacturing, suitable flexible substrates and compatible postprocessing are essential. Here, custom-developed coated papers are demonstrated to facilitate the inkjet fabrication of high performance copper patterns. The patterns are fabricated in ambient conditions using water-based CuO dispersion and intense pulsed light (IPL) processing. Papers using a porous CaCO3 precoating, combined with an acidic mesoporous absorption coating, improve the effectiveness and reliability of the IPL process. The processing is realizable within 5 ms, using a single pulse of light. A resistivity of 3.1 ± 0.12 μΩ·cm is achieved with 400 μm wide conductors, corresponding to more than 50% of the conductivity of bulk copper. This is higher than previously reported results for IPL-processed copper.
|
|
