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Fabrication of Low-Cost Flexible Superhydrophobic Antibacterial Surface with Dual-Scale Roughness

Tripathy, Abinash and Kumar, Arvind and Sreedharan, Syama and Muralidharan, Girish and Pramanik, Amitava and Nandi, Dipankar and Sen, Prosenjit (2018) Fabrication of Low-Cost Flexible Superhydrophobic Antibacterial Surface with Dual-Scale Roughness. In: ACS BIOMATERIALS SCIENCE & ENGINEERING, 4 (6, SI). pp. 2213-2223.

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Official URL: https://dx.doi.org/10.1021/acsbiomaterials.8b00209

Abstract

In this work, we report a large-area fabrication of a flexible superhydrophobic bactericidal surface decorated with copper hydroxide nanowires. This involves a simple two-step method which involves growth followed by transfer of the nanowires onto the polydimethylsiloxane (PDMS) surface by mechanical peeling. Additional roughness in PDMS is obtained through incomplete wetting of the nanoscale gaps which leads to dual-scale roughness and superhydrophobicity with a contact angle of 169 and hysteresis of less than 2. The simplicity of the process makes it low-cost and easily scalable. The process allows fabrication of nonplanar 3D surfaces. The surface shows blood repellence and antibacterial activity against Escherichia coli with more than 5 log reductions in bacterial colony. The surface also shows hemoconapatible behavior, making it suitable for healthcare applications. The fabricated surface is found to be extremely robust against stretching, twisting, sandpaper abrasion, solid weight impact, and tape peel test. The surface is found to withstand human weight multiple times without losing its hydrophobicity, making it suitable for several practical scenarios in healthcare and household applications.

Item Type: Journal Article
Additional Information: Copyright of this article belong to AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Biological Sciences > Biochemistry
Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Depositing User: Id for Latest eprints
Date Deposited: 03 Jul 2018 15:32
Last Modified: 03 Jul 2018 15:32
URI: http://eprints.iisc.ac.in/id/eprint/60134

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