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Issue 28, 2016

Finite-size scaling in silver nanowire films: design considerations for practical devices

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Abstract

We report the first application of finite-size scaling theory to nanostructured percolating networks, using silver nanowire (AgNW) films as a model system for experiment and simulation. AgNWs have been shown to be a prime candidate for replacing Indium Tin Oxide (ITO) in applications such as capacitive touch sensing. While their performance as large area films is well-studied, the production of working devices involves patterning of the films to produce isolated electrode structures, which exhibit finite-size scaling when these features are sufficiently small. We demonstrate a generalised method for understanding this behaviour in practical rod percolation systems, such as AgNW films, and study the effect of systematic variation of the length distribution of the percolating material. We derive a design rule for the minimum viable feature size in a device pattern, relating it to parameters which can be derived from a transmittance–sheet resistance data series for the material in question. This understanding has direct implications for the industrial adoption of silver nanowire electrodes in applications where small features are required including single-layer capacitive touch sensors, LCD and OLED display panels.

Graphical abstract: Finite-size scaling in silver nanowire films: design considerations for practical devices

Supplementary files

Article information


Submitted
16 May 2016
Accepted
26 Jun 2016
First published
27 Jun 2016

This article is Open Access

Nanoscale, 2016,8, 13701-13707
Article type
Paper

Finite-size scaling in silver nanowire films: design considerations for practical devices

M. J. Large, M. Cann, S. P. Ogilvie, A. A. K. King, I. Jurewicz and A. B. Dalton, Nanoscale, 2016, 8, 13701 DOI: 10.1039/C6NR03960J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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