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Inkjet-printed gold electrodes on paper: characterization and functionalization.

Anni Määttänen¹, Petri Ihalainen, Petri Pulkkinen

¹Center of Excellence for Functional Materials, Laboratory of Physical Chemistry, Åbo Akademi University, Porthaninkatu 3, FI-20500 Turku, Finland. anni.maattanen@abo.fi

ACS Applied Materials & Interfaces

|January 12, 2012

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Researchers created conductive gold electrodes on paper using inkjet printing and IR sintering. Optimized printing achieved a low volume resistivity of 1.6 × 10⁻⁷ Ω m in a single layer.

Area of Science:

Materials Science
Nanotechnology
Electrical Engineering

Background:

Advancements in printed electronics require novel conductive materials.
Paper substrates offer a low-cost, flexible alternative for electronic devices.
Gold nanoparticles (AuNPs) are promising for conductive inks due to their stability and conductivity.

Purpose of the Study:

To synthesize and characterize inkjet-printed gold nanoparticle electrodes on paper.
To investigate the impact of infrared (IR) sintering and self-assembled monolayer (SAM) functionalization on electrode properties.
To achieve highly conductive electrodes with optimized printing parameters.

Main Methods:

Synthesis of gold nanoparticles for conductive ink formulation.
Inkjet printing of AuNPs onto a paper substrate.

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Infrared (IR) sintering to enhance electrode conductivity.

Functionalization using octadecanethiol self-assembled monolayers (SAMs).

Topographical, chemical, and electrical characterization (e.g., volume resistivity).

Main Results:

Successfully fabricated conductive electrodes via inkjet printing and IR sintering.
Optimized printing parameters yielded a low volume resistivity of approximately 1.6 × 10⁻⁷ Ω m for a single print layer.
Demonstrated the influence of sintering and SAM formation on electrode performance.
Characterization confirmed the topographical and chemical integrity of the printed electrodes.

Conclusions:

Inkjet-printed gold nanoparticle electrodes on paper are feasible for conductive applications.
IR sintering is a critical step for achieving high conductivity in printed electrodes.
Optimized processes enable the creation of low-resistivity electrodes suitable for printed electronics.