Silver nanowires for anti-counterfeiting

Yan Wang; Ningning Bai; Junlong Yang; Zhiguang Liu; Gang Li; Minkun Cai; Lingyu Zhao; Yuan Zhang; Jianming Zhang; Chunhua Li; Yunlong Zhou; Chuan Fei Guo

Journal of Materiomics (Mar 2020)

Silver nanowires for anti-counterfeiting

Yan Wang,
Ningning Bai,
Junlong Yang,
Zhiguang Liu,
Gang Li,
Minkun Cai,
Lingyu Zhao,
Yuan Zhang,
Jianming Zhang,
Chunhua Li,
Yunlong Zhou,
Chuan Fei Guo

Affiliations

Yan Wang: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Ningning Bai: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Junlong Yang: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Zhiguang Liu: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Gang Li: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Minkun Cai: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Lingyu Zhao: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Yuan Zhang: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Jianming Zhang: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China
Chunhua Li: Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute of Biomaterials and Engineering, University of Chinese Academy of Sciences, Wenzhou, 325000, China
Yunlong Zhou: Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute of Biomaterials and Engineering, University of Chinese Academy of Sciences, Wenzhou, 325000, China
Chuan Fei Guo: Department of Materials Science & Engineering, Centers for Mechanical Engineering Research and Education at MIT and SUSTech, Southern University of Science and Technology, Shenzhen, 518055, China; Corresponding author.

Journal volume & issue: Vol. 6, no. 1
pp. 152 – 157

Abstract

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Silver nanowire (AgNW) films have been widely used as flexible transparent electrodes due to the high electrical conductance and high transmittance in the visible range. The infrared (IR) properties of AgNW films, however, are seldom discussed. Here, we show that ultrathin AgNWs present high transmittance in the visible range (∼95%) and high reflectance (60–70%) in the IR range of 8–14 μm. Such a significant difference makes AgNW films invisible to naked eyes but visible under an IR camera, being an ideal selection for anti-counterfeit technologies, while no excitation is required. We have demonstrated that AgNW films can be spray-coated on either flat or microstructured surfaces with high conformability and high scratch-resistance, and thus these anti-counterfeiting materials can be applied to a variety of applications. The AgNW-based anti-counterfeiting may be helpful for combating counterfeiting crimes in the fields of medicines, artwork, banknotes, brand luxuries, industrial parts, and so on. Keywords: Silver nanowires, Anti-counterfeiting, Infrared light, Excitation-free, Conformability

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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