[Journal] Inkjet-printed ultrathin gold electrodes with implementation of photothermal effect work is published - Kang Lab @ AEDRG

[Journal] Inkjet-printed ultrathin gold electrodes with implementation of photothermal effect work is published

11th April 2023

Our recent research on developing an inkjet-printed customizable, transparent electrode for resistive temperature detection is published online in ACS Applied Materials & Interfaces (IF:10.38) on April 11th, 2023. This work was led by Duhee Kim along with Nari Hong, Woongki Hong, Junhee Lee, Murali Bissannnagari, Youngjae Cho, Prof. Jae Eun Jung, Prof. Hyuk-Jun Kwon, and Prof. Hongki Kang.

Title: Inkjet-Printed Polyelectrolyte Seed Layer-Based, Customizable, Transparent, Ultrathin Gold Electrodes and Facile Implementation of Photothermal Effect


Abstract: Recently, interest in transparent electrodes has been increasing in biomedical engineering applications for such as electro-optical hybrid neuro-technologies. However, conventional photolithography-based electrode fabrication methods have limited design customization and large-area applicability. For biomedical engineering applications, it is crucial that we can easily customize the electrode design for different patients over a large body area. In this paper, we propose a novel method to fabricate customization-friendly, transparent, ultrathin, gold microelectrodes using inkjet printing technology. Unlike with typical direct printing of conductive inks, we inkjet-printed a polymer nucleation-inducing seed layer, followed by mask-less vacuum deposition of ultrathin gold (<6 nm) to produce selectively, high-transparency electrodes in the predefined shapes of the inkjet-printed polymer. Owing to the design flexibility of inkjet printing, the transparent ultrathin gold electrodes can be highly efficient in design customization over a large area. Simultaneously, a layer of nonconductive gold islands is formed in the nonprinted region, and this nanostructured layer can implement a photothermal effect that offers versatility for novel biomedical applications. As a demonstration of the effectiveness of these transparent electrodes, and the facile implementation of the photothermal effect for biomedical applications, we successfully fabricated transparent resistive temperature detectors. We used these to directly sense the photothermal effect and to demonstrate their bioimaging capabilities.

From Media