Development of Printable Graphene/Ag Nanowire Conductive Ink for Electromagnetic Wave Absorption

Hong Phuong Nguyen; Quan Anh Dang; Suong Thu Huynh; Thuy Minh Le; Thuan Huu Mai; Dang Thanh Huyen; Nguyen Khac Long Hiep; Dương Lã

doi:10.62239/jca.2026.016

Authors

Nguyen Thi Hong Phuong School of Chemistry and Life Sciences, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam
Quan Anh Dang Faculty of engineering physics, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi
Huynh Thu Suong School of Chemistry and Life Sciences, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam
Thuy Minh Le School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi
Thuan Huu Mai Faculty of engineering physics, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi
Dang Thanh Huyen Vietnam Standards and Quality Institute, Ministry of Science and Technology
Nguyen Khac Long Hiep Phenikaa University, Nguyen Trac Street, Duong Noi Ward, Hanoi
Duong Duc La Institute of Materials, Biology and Environment, 17 Hoang Sam, Nghia Do, Cau Giay, Hanoi, Viet Nam

DOI:

https://doi.org/10.62239/jca.2026.016

Keywords:

Graphene nanoplatelets, silver nanowires, metamaterial absorber, electromagnetic wave absorption , conductive ink

Abstract

This study reports the formulation and implementation of a graphene/Ag nanowire (AgNW) hybrid conductive ink tailored for printed metamaterial-based electromagnetic (EM) wave absorbers. Graphene nanoplatelets (5 - 20 µm lateral size) provide abundant interfaces and dielectric loss, while high–aspect-ratio Ag nanowires (50 - 100 nm diameter, micrometer-scale length) establish efficient conductive pathways at low filler content. The ink shows good dispersion stability and printability, enabling accurate pattern transfer onto paper substrates. A cross-shaped metasurface geometry (l₁ = 18 mm, l₂ = 15 mm, w₁ = 8 mm) is employed to investigate absorber behavior. Microstructural characterization confirms the formation of an interconnected 2D–1D network, favorable for charge transport and electromagnetic loss. Measured and simulated results indicate effective EM energy dissipation and stable absorption under oblique incidence conditions up to 60°. The proposed ink system and printing approach offer a practical route for lightweight, flexible, and scalable EM absorber fabrication.

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