TY - JOUR
T1 - Bacteriophage M13 Aggregation on a Microhole Poly(ethylene-terephthalate) Substrate Produces an Anionic Current Rectifier:
T2 - Sensitivity toward Anionic versus Cationic Guests
AU - Putra, Budi Riza Putra
AU - Szot-Karpińska, Katarzyna
AU - Kudła , Patryk
AU - Yin, Han
AU - Boswell, Jacob
AU - Squires, Adam
AU - da Silva, Marcelo
AU - Edler, Karen
AU - Fletcher, Philip
AU - Parker, Steve
AU - Marken, Frank
PY - 2020/1/21
Y1 - 2020/1/21
N2 - Bacteriophage material (M13, wild-type) deposited as a film onto a poly-ethylene-terephthalate (PET) substrate (6 m thick with a 20 m diameter laser-drilled microhole) has been investigated for ion conductivity and ionic current rectification effects for potential applications in membranes. The M13 aggregate membrane forms under acidic conditions (in aqueous 10 mM acids) and behaves like a microporous anion conductor with micropores defined by the packing of cylindrical virus particles. Asymmetric deposition on the PET film substrate in conjunction with semi-permeability leads to anionic diode behaviour. Typical rectification ratio values are around 10 (determined at +/-1V) in aqueous 10 mM acids. Cationic guest species (aqueous Cu2+, Co2+, Ag+) consistently lead to a rectification minimum at 0.5 mM guest concentration. In contrast, anionic guest species (indigo carmine) lead to a similar rectification minimum already at 5 M concentration. The behaviour is proposed to be associated with cation exclusion effects on transport.
AB - Bacteriophage material (M13, wild-type) deposited as a film onto a poly-ethylene-terephthalate (PET) substrate (6 m thick with a 20 m diameter laser-drilled microhole) has been investigated for ion conductivity and ionic current rectification effects for potential applications in membranes. The M13 aggregate membrane forms under acidic conditions (in aqueous 10 mM acids) and behaves like a microporous anion conductor with micropores defined by the packing of cylindrical virus particles. Asymmetric deposition on the PET film substrate in conjunction with semi-permeability leads to anionic diode behaviour. Typical rectification ratio values are around 10 (determined at +/-1V) in aqueous 10 mM acids. Cationic guest species (aqueous Cu2+, Co2+, Ag+) consistently lead to a rectification minimum at 0.5 mM guest concentration. In contrast, anionic guest species (indigo carmine) lead to a similar rectification minimum already at 5 M concentration. The behaviour is proposed to be associated with cation exclusion effects on transport.
U2 - 10.1021/acsabm.9b00952
DO - 10.1021/acsabm.9b00952
M3 - Article
SN - 2576-6422
VL - 3
SP - 512
EP - 521
JO - ACS Applied Bio Materials
JF - ACS Applied Bio Materials
IS - 1
ER -