Conversion of antibacterial activity of graphene-coated textiles through surface polarity

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abstract

Graphene is emerging in numerous wearable and biomedical applications. Understanding the impact of graphene-based nanocomposites over bacterial activity is critical for design appropriate technical solutions. In this work, antibacterial activity of monolayer and few-layer graphene is tested against Gram-negative and Gram-positive model bacteria. Such graphene-based nanomaterials present different effects on bacteria viability, depending on concentration and shape. The presence of dopant agents can either increase or revert graphene antibacterial effect. Among other bactericidal mechanisms, we also demonstrate that graphene surface polarity is connected to antibacterial properties and can be easily modified by surface charge transfer doping. This electrophilicity tuning offers a novel mechanism for the molecular basis of graphene's antibacterial activity.

keywords

LIGHT-EMITTING-DIODES; ESCHERICHIA-COLI; OXIDE; MECHANISMS; NANOSHEETS; LAYER

subject category

Science & Technology - Other Topics; Materials Science

authors

Rodrigues, DP; Moreirinha, C; Rajan, G; Neves, AIS; Freitas, SC; Sequeira, S; Russo, S; Craciun, MF; Almeida, A; Alves, H

our authors

foto Catarina Moreirinha

Catarina Moreirinha

Post-Doc Fellowship
foto Helena Alves

Helena Alves

Principal Researcher
foto Sara Isabel Holbeche Sequeira

Sara Isabel Holbeche Sequeira

PhD Student

Groups

G1 - Porous Materials and Nanosystems
G4 - Renewable Materials and Circular Economy

Projects

Single Crsytal Solar Cell (IF/01088/2014)

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Sensores de temperatura, gases e humidade baseados em grafeno para a eletronica têxtil (Graphsense)

Inovadores Adesivos Texteis Condutores (CONDAD)

acknowledgements

Fundacao para a Ciencia e a Tecnologia, Grant/Award Numbers: SFRH-BD-129827-2017, IF/01088/2014, UIDB/50011/2020, UIDP/50011/2020; Fundo Regional para a Ciencia e Tecnologia, Grant/Award Numbers: POCI-01-0145-FEDER-032072, POCI-01-0247-FEDER-033126, PCIF/SSO/0163/2019; Engineering and Physical Sciences Research Council, Grant/Award Numbers: EP/S019855/1, EP/M001024/1, EP/M002438/1

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Publication Details

type
Journal Article
year
2023
journal
NANO SELECT
volume
4
publisher
WILEY
issue
8
digital object identifier
10.1002/nano.202100226
web of science article identifier
WOS:001176637400005

Citations

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