Adapting Aluminum-Doped Zinc Oxide for Electrically Conductive Membranes Fabricated by Atomic Layer Deposition

Wulin Yang, Moon Son, Ruggero Rossi, Johannes S. Vrouwenvelder, Bruce E. Logan

Research output: Contribution to journalArticle

Abstract

The use of electrically conductive membranes has recently drawn great interest in water treatment as an approach to reduce biofouling. Most conductive membranes are made by binding nanoparticles (carbon nanotubes or graphene) to a polymeric membrane using additional polymers, but this method risks leaching these nanomaterials into the environment. A new approach was developed here based on producing an electrically conductive layer of aluminum-doped zinc oxide (AZO) by atomic layer deposition. The aqueous instability of AZO, which is a critical challenge for water applications, was solved by capping the AZO layer with an ultrathin (∼11 nm) TiO2 layer (AZO/TiO2). The combined film exhibited prolonged stability in water and had a low sheet resistance of 67 ω/sq with a 120 nm-thick coating, while the noncapped AZO coating quickly deteriorated as shown by a large increase in membrane resistance. The AZO/TiO2 membranes had enhanced resistance to biofouling, with a 72% reduction in bacterial counts in the absence of an applied current due to its higher hydrophilicity than the bare polymeric membrane, and it achieved an additional 50% reduction in bacterial colonization with an applied voltage. The use of TiO2-capped AZO layers provides a new approach for producing conductive membranes using abundant materials, and it avoids the risk of releasing nanoparticles into the environment.

Original languageEnglish (US)
Pages (from-to)963-969
Number of pages7
JournalACS Applied Materials and Interfaces
Volume12
Issue number1
DOIs
StatePublished - Jan 8 2020

Fingerprint

Zinc Oxide
Atomic layer deposition
Zinc oxide
Aluminum
Membranes
Biofouling
Polymeric membranes
Nanoparticles
Coatings
Carbon Nanotubes
Graphite
Water
Sheet resistance
Hydrophilicity
Water treatment
Nanostructured materials
Graphene
Leaching
Carbon nanotubes
Polymers

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Yang, Wulin ; Son, Moon ; Rossi, Ruggero ; Vrouwenvelder, Johannes S. ; Logan, Bruce E. / Adapting Aluminum-Doped Zinc Oxide for Electrically Conductive Membranes Fabricated by Atomic Layer Deposition. In: ACS Applied Materials and Interfaces. 2020 ; Vol. 12, No. 1. pp. 963-969.
@article{151cf7539325487fa3a394ae82c83cf2,
title = "Adapting Aluminum-Doped Zinc Oxide for Electrically Conductive Membranes Fabricated by Atomic Layer Deposition",
abstract = "The use of electrically conductive membranes has recently drawn great interest in water treatment as an approach to reduce biofouling. Most conductive membranes are made by binding nanoparticles (carbon nanotubes or graphene) to a polymeric membrane using additional polymers, but this method risks leaching these nanomaterials into the environment. A new approach was developed here based on producing an electrically conductive layer of aluminum-doped zinc oxide (AZO) by atomic layer deposition. The aqueous instability of AZO, which is a critical challenge for water applications, was solved by capping the AZO layer with an ultrathin (∼11 nm) TiO2 layer (AZO/TiO2). The combined film exhibited prolonged stability in water and had a low sheet resistance of 67 ω/sq with a 120 nm-thick coating, while the noncapped AZO coating quickly deteriorated as shown by a large increase in membrane resistance. The AZO/TiO2 membranes had enhanced resistance to biofouling, with a 72{\%} reduction in bacterial counts in the absence of an applied current due to its higher hydrophilicity than the bare polymeric membrane, and it achieved an additional 50{\%} reduction in bacterial colonization with an applied voltage. The use of TiO2-capped AZO layers provides a new approach for producing conductive membranes using abundant materials, and it avoids the risk of releasing nanoparticles into the environment.",
author = "Wulin Yang and Moon Son and Ruggero Rossi and Vrouwenvelder, {Johannes S.} and Logan, {Bruce E.}",
year = "2020",
month = "1",
day = "8",
doi = "10.1021/acsami.9b20385",
language = "English (US)",
volume = "12",
pages = "963--969",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "1",

}

Adapting Aluminum-Doped Zinc Oxide for Electrically Conductive Membranes Fabricated by Atomic Layer Deposition. / Yang, Wulin; Son, Moon; Rossi, Ruggero; Vrouwenvelder, Johannes S.; Logan, Bruce E.

In: ACS Applied Materials and Interfaces, Vol. 12, No. 1, 08.01.2020, p. 963-969.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Adapting Aluminum-Doped Zinc Oxide for Electrically Conductive Membranes Fabricated by Atomic Layer Deposition

AU - Yang, Wulin

AU - Son, Moon

AU - Rossi, Ruggero

AU - Vrouwenvelder, Johannes S.

AU - Logan, Bruce E.

PY - 2020/1/8

Y1 - 2020/1/8

N2 - The use of electrically conductive membranes has recently drawn great interest in water treatment as an approach to reduce biofouling. Most conductive membranes are made by binding nanoparticles (carbon nanotubes or graphene) to a polymeric membrane using additional polymers, but this method risks leaching these nanomaterials into the environment. A new approach was developed here based on producing an electrically conductive layer of aluminum-doped zinc oxide (AZO) by atomic layer deposition. The aqueous instability of AZO, which is a critical challenge for water applications, was solved by capping the AZO layer with an ultrathin (∼11 nm) TiO2 layer (AZO/TiO2). The combined film exhibited prolonged stability in water and had a low sheet resistance of 67 ω/sq with a 120 nm-thick coating, while the noncapped AZO coating quickly deteriorated as shown by a large increase in membrane resistance. The AZO/TiO2 membranes had enhanced resistance to biofouling, with a 72% reduction in bacterial counts in the absence of an applied current due to its higher hydrophilicity than the bare polymeric membrane, and it achieved an additional 50% reduction in bacterial colonization with an applied voltage. The use of TiO2-capped AZO layers provides a new approach for producing conductive membranes using abundant materials, and it avoids the risk of releasing nanoparticles into the environment.

AB - The use of electrically conductive membranes has recently drawn great interest in water treatment as an approach to reduce biofouling. Most conductive membranes are made by binding nanoparticles (carbon nanotubes or graphene) to a polymeric membrane using additional polymers, but this method risks leaching these nanomaterials into the environment. A new approach was developed here based on producing an electrically conductive layer of aluminum-doped zinc oxide (AZO) by atomic layer deposition. The aqueous instability of AZO, which is a critical challenge for water applications, was solved by capping the AZO layer with an ultrathin (∼11 nm) TiO2 layer (AZO/TiO2). The combined film exhibited prolonged stability in water and had a low sheet resistance of 67 ω/sq with a 120 nm-thick coating, while the noncapped AZO coating quickly deteriorated as shown by a large increase in membrane resistance. The AZO/TiO2 membranes had enhanced resistance to biofouling, with a 72% reduction in bacterial counts in the absence of an applied current due to its higher hydrophilicity than the bare polymeric membrane, and it achieved an additional 50% reduction in bacterial colonization with an applied voltage. The use of TiO2-capped AZO layers provides a new approach for producing conductive membranes using abundant materials, and it avoids the risk of releasing nanoparticles into the environment.

UR - http://www.scopus.com/inward/record.url?scp=85077661234&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077661234&partnerID=8YFLogxK

U2 - 10.1021/acsami.9b20385

DO - 10.1021/acsami.9b20385

M3 - Article

C2 - 31834766

AN - SCOPUS:85077661234

VL - 12

SP - 963

EP - 969

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 1

ER -