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Updated: May 30, 2025

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

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Published on: June 18, 2013

Laser-Induced Nanowire Percolation Interlocking for Ultrarobust Soft Electronics.

Yeongju Jung¹, Kyung Rok Pyun¹, Sejong Yu¹

¹Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea.

Nano-Micro Letters

|January 31, 2025

Summary

A novel laser process enhances metallic nanowire adhesion and robustness on various substrates. This method avoids protective layers, improving reliability for soft electronics and wearable sensors.

Keywords:

Conducting polymer Functionalization Laser processing Mechanical interlocking Nanowire percolation network

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Area of Science:

Materials Science
Nanotechnology
Soft Electronics

Background:

Metallic nanowires offer excellent mechanical compliance and electrical properties for soft electronics.
Weak adhesion and low robustness of nanowire networks limit their reliability and applications.
Existing methods often require insulating protective layers, restricting utility.

Purpose of the Study:

To develop a versatile laser-based process for strong adhesion and mechanical robustness of nanowire networks on diverse substrates.
To eliminate the need for protective insulating layers in nanowire-based devices.
To demonstrate the broad applicability and enhanced performance of the laser-induced interlocking mechanism.

Main Methods:

Utilizing laser-induced photothermal energy at the nanowire-substrate interface.
Facilitating interpenetration between the nanowire network and the polymer matrix.
Achieving mechanical interlocking through percolation for enhanced adhesion and robustness.

Main Results:

Demonstrated strong adhesion and mechanical robustness of metallic nanowire networks on various substrates without protective layers.
Showcased the broad applicability across different metallic nanowires and thermoplastic substrates.
Validated the enhanced robustness in reusable wearable physiological sensors and stable functionalization of conducting polymers in wet environments.

Conclusions:

The laser-based process offers a generalized and versatile method for improving nanowire network reliability.
This technique significantly enhances mechanical robustness and electrical conductivity, expanding applications in wearable electronics and electrochemical devices.
Eliminating protective layers broadens the utility of metallic nanowires in advanced electronic applications.