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. 2023 Jan 4;8(2):1929-1936.
doi: 10.1021/acsomega.2c04687. eCollection 2023 Jan 17.

Printed Platinum Nanoparticle Thin-Film Structures for Use in Biology and Catalysis: Synthesis, Printing, and Application Demonstration

Annelies Sels  1 , Vivek Subramanian  1
Affiliations

Printed Platinum Nanoparticle Thin-Film Structures for Use in Biology and Catalysis: Synthesis, Printing, and Application Demonstration

Annelies Sels et al. ACS Omega. .

Abstract

This work describes the formulation of a stable platinum nanoparticle-based ink for drop-on-demand inkjet printing and fabrication of metallic platinum thin films. A highly conductive functional nanoink was formulated based on dodecanethiol platinum nanoparticles (3-5 nm) dispersed in a toluene-terpineol mixture with a loading of 15 wt %, compatible with inkjet printing. The reduced sintering temperatures (200 °C) make them interesting for integration in devices using flexible substrates and substrates that cannot tolerate high-temperature exposures. A resistive platinum heater was successfully printed as a demonstrator for integration of the platinum ink. The platinum nanoink developed herein will be, therefore, attractive for a range of applications in biology, chemistry, and printed electronics.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
TEM of platinum nanoparticles with hexanethiol (A; 2.4 ± 0.5 nm), octanethiol (B; 2.5 ± 0.4 nm), dodecanthiol (C; 2.3 ± 0.6 nm), and dodecylthiosulfate (D; 2.2 ± 0.3 nm) ligands. The scale bar represents 10 nm.
Figure 2
Figure 2
TGA analysis of platinum nanoparticles with hexanethiol (Pt 6), octanethiol (Pt c8), dodecanthiol (Pt c12 sh), and dodecylthiosulfate (Pt c12 sso3) ligands.
Figure 3
Figure 3
Rheometry studies of platinum nanoparticles in 10 and 15 wt % toluene.
Figure 4
Figure 4
Sintering studies of hexanethiol, 3.2 × 10–6 Ω·m, and 0.055 μm thick. The scale bar represents 20 μm (150 °C), 10 μm (200 °C), 30 μm (225 °C), and 20 μm (250 °C).
Figure 5
Figure 5
Sintering studies of dodecanethiol, 3.6 × 10–6 Ω·m, and 0.02 μm thick. The scale bar represents 4 μm (150 °C), 4 μm (200 °C), 2 μm (225 °C), and 4 μm (250 °C).
Figure 6
Figure 6
Resistive heater with an integrated temperature sensor. Sensing measurements were performed by probing two probe tips on the printed pads of the heater (major serpentine) and two probe tips on the printed pads of the RTD (middle feature).
Figure 7
Figure 7
Calibration (left) and power consumption (right) of the printed heater.
Figure 8
Figure 8
Recovery of the heater: thermal cycling evaluation of the printed resistive heater. Temperature–time curve evaluating the recovery of the heater at 45 mA (107.7 °C), 20 mA (30.8 °C), and 30 mA (57.0 °C).
See this image and copyright information in PMC

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