Printing gold nanoparticles with an electrohydrodynamic direct-write device

Abstract

A dispersion containing 15nm gold particles in ethanol was subjected to electrohydrodynamic atomization, producing droplets with an average size of ~2 6m as measured by laser diffraction. An electrohydrodynamic direct-write device was used to deposit the dispersion onto silicon wafers with the intention of printing gold tracks. Immediately after deposition ethanol evaporated, leaving the gold particles organised in a ~7 5m wide central region surrounded by two regions, each ~5 0m wide, at the edge of which two further gold tracks, each ~7 m existed.

Inducing compressive residual stress in microscale print-lines for flexible electronics

“…Finally, following up on the introductory comments on the type of technology that drives this analysis, we remark that, unfortunately, inkjet and electrohydrodynamic printing do not allow precise control over the structure of the printed lines. This often results in lines with scalloped edges or non-uniform widths, and offer only limited control over the height of the printed features (Ahmad, Rasekh, & Edirisinghe, 2010;Huang et al, 2003;Samarasinghe, Pastoriza-Santos, Edirisinghe, Reece, & Liz-Marzan, 2006;Sirringhaus et al, 2000). Recently, nanoimprint lithography has been proposed as a means of decreasing the feature size of patterned nanoparticles while allowing more precise control over the structure of the printed lines (Ko et al, 2007Park et al, 2008).…”

On the thermal response of a surface deposited laser-irradiated powder particle

“…In particular, because many substrates can become thermally damaged, for example from thermal stresses, ascertaining the appropriate amount of laser input is necessary. Applications include, for example, optical coatings and photonics (Nakanishi et al [2]), MEMS applications (Fuller et al [3], Samarasinghe et al [4] and Gamota et al [5]) and Biomedical devices (Ahmad et al [6]). In terms of processing techniques, we refer the reader to Sirringhaus et al [7], Wang et al [8], Huang et al [9], Choi et al [10][11][12][13] and Demko et al [14,15] for details.…”

“…In other words, the depicted numerical results are essentially free of numerical error. 4 The approach provides researchers in the field to quickly assess how much power input is needed to drive a system to a prespecified temperature, which is an essential first step in powder-based additive manufacturing. The current analysis does not include phase-transformations and latent heat terms used to describe subsequent softening, melting or ablation.…”

“…A continuous beam is simply I i (t) = I o 4. For several benchmark problems, for constant loadings, the numerical and analytical solution were generated in complete agreement.T.I.…”

Electrohydrodynamic pulsed-inkjet characteristics of various inks containing aluminum particles

“…Their solvent was ethanol containing 0.5-mm alumina ceramic particles between 20 and 60 wt%. Samarasinghe et al (2006) also used an EHD inkjet to produce 75-mm relics using an ethanol solvent containing 15-nm gold particles at 10 wt%. Their drop-size distribution was Gaussian with a 30-mm mean while the inner diameter of their nozzle was 200 mm.…”