Two‐Dimensional Protein Crystals for Solar Energy Conversion

Saboe, Patrick O.; Lubner, Carolyn E.; McCool, Nicholas S.; Vargas‐Barbosa, Nella M.; Yan, Hu; Chan, Stanley; Ferlez, Bryan; Bazan, Guillermo C.; Golbeck, John H.; Kumar, Manish

doi:10.1002/adma.201402375

Cited by 32 publications

(26 citation statements)

References 33 publications

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“…The COE structures discussed here contain a hydrophobic oligophenylenevinylene π‐conjugated “backbone” region and polar pendant‐group terminals ( Scheme a); molecular features that give them a spontaneous affinity to intercalate into lipid bilayers. With this membrane‐intercalation property, COEs have been applied in different bioelectrochemical systems with wastewater inoculum, weak or model electroactive microbial species, or photosynthetic systems, and can significantly improve current generation or modify the bioproduction yields . Antimicrobial properties as a function of COE structure have been examined with different bacteria, which leads to the discussion of potential application in microbial selection .…”

Section: Introductionmentioning

confidence: 99%

Membrane‐Intercalating Conjugated Oligoelectrolytes: Impact on Bioelectrochemical Systems

2015

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Conjugated oligoelectrolytes (COEs), molecules that are defined by a π-delocalized backbone and terminal ionic pendant groups, have been previously demonstrated to effectively reduce charge-injection/extraction barriers at metal/organic interfaces in thin-film organic-electronic devices. Recent studies demonstrate a spontaneous affinity of certain COEs to intercalate into, and align within, lipid bilayers in an ordered orientation, thereby allowing modification of membrane properties and the functions of microbes in bioelectrochemical and photosynthetic systems. Several reports have provided evidence of enhanced current generation and bioproduction. Mechanistic approaches suggest that COEs influence microbial extracellular electron transport to abiotic electrode surfaces via more than one proposed pathway, including direct electron transfer and meditated electron transfer. Molecular dynamics simulations as a function of molecular structure suggest that insertion of cationic COEs results in membrane thinning as the lipid phosphate head groups are drawn toward the center of the bilayer. Since variations in molecular structures, especially the length of the conjugated backbone, distribution of ionic groups, and hydrophobic substitutions, show an effect on their antimicrobial properties, preferential cell localization, and microbial selection, it is promising to further design novel membrane-intercalating molecules based on COEs for practical applications, including energy generation, environmental remediation, and antimicrobial treatment.

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Section: Introductionmentioning

confidence: 99%

Membrane‐Intercalating Conjugated Oligoelectrolytes: Impact on Bioelectrochemical Systems

2015

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“…Recent experimental and theoretical studies have improved the understanding of the essential physics behind light harvesting and energy transfer in the incorporation networks of photosynthetic densely arranged pigment proteins . The efficient light‐to‐charge conversion in natural photosynthetic organisms has been successfully used to design and construct alternative functional photodetectors and photoelectrochemical devices . Researchers have paid high attention on the exploitation of the photosynthetic light‐harvesting protein complexes and non‐toxic natural dyes in Grätzel photoelectrochemical cells .…”

Section: Figurementioning

confidence: 99%

“…[4][5][6][7][8] The efficient light-to-chargec onversion in natural photosynthetic organismsh as been successfully used to design andc onstruct alternative functional photodetectors and photoelectrochemicald evices. [9][10][11][12] Researchers have paid high attention on the exploitation of the photosynthetic lightharvesting protein complexes and non-toxic natural dyes in Grätzel photoelectrochemical cells. [13][14][15][16] These photosynthetic protein complexes,i ncluding light harvestingC hl a/b complexes in photosystem II (LHCII), [17][18] photosystem-I [11,[19][20] and photosystem-II [21] are abundant, easy-extracted, environmental benign and low-cost for converting sunlight energy by the interface between semiconductor and protein complex.…”

mentioning

confidence: 99%

“…[9][10][11][12] Researchers have paid high attention on the exploitation of the photosynthetic lightharvesting protein complexes and non-toxic natural dyes in Grätzel photoelectrochemical cells. [13][14][15][16] These photosynthetic protein complexes,i ncluding light harvestingC hl a/b complexes in photosystem II (LHCII), [17][18] photosystem-I [11,[19][20] and photosystem-II [21] are abundant, easy-extracted, environmental benign and low-cost for converting sunlight energy by the interface between semiconductor and protein complex. As major photosynthetic light-harvesting antenna in brown algae and diatoms, FCP complexes have dominated primary biomass productiona nd major biochemical cycles.…”

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confidence: 99%

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Photoelectrochemical Complexes of Fucoxanthin‐Chlorophyll Protein for Bio‐Photovoltaic Conversion with a High Open‐Circuit Photovoltage

Zhang

Cheng

Dong

et al. 2017

Chemistry An Asian Journal

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Open-circuit photovoltage (V ) is among the critical parameters for achieving an efficient light-to-charge conversion in existing solar photovoltaic devices. Natural photosynthesis exploits light-harvesting chlorophyll (Chl) protein complexes to transfer sunlight energy efficiently. We describe the exploitation of photosynthetic fucoxanthin-chlorophyll protein (FCP) complexes for realizing photoelectrochemical cells with a high V . An antenna-dependent photocurrent response and a V up to 0.72 V are observed and demonstrated in the bio-photovoltaic devices fabricated with photosynthetic FCP complexes and TiO nanostructures. Such high V is determined by fucoxanthin in FCP complexes, and is rarely found in photoelectrochemical cells with other natural light-harvesting antenna. We think that the FCP-based bio-photovoltaic conversion will provide an opportunity to fabricate environmental benign photoelectrochemical cells with high V , and also help improve the understanding of the essential physics behind the light-to-charge conversion in photosynthetic complexes.

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“…Depending on the ratio of the hydrophilic and hydrophobic block volume fractions, packing constraints lead to structures such as (in order of decreasing hydrophilic fraction) spherical micelles, wormlike micelles, membranes/vesicles, and inverted microstructures . Because these polymers have greater chemical and mechanical stability than lipids, and because some BCs have been used to incorporate transmembrane proteins, as well as drugs, DNA, dyes, and nanoparticles, BC membranes are widely studied as lipid‐membrane mimics with the stability required for applications such as sensors, separations, energy production, imaging, and drug and gene delivery …”

Section: Introductionmentioning

confidence: 99%

Porous Vesicles with Extrusion‐Tunable Permeability and Pore Size from Mixed Solutions of PEO–PPO–PEO Triblock Copolymers

Schantz

Ren

Pachalla

et al. 2018

Macro Chemistry & Physics

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Block copolymer (BC) vesicles in aqueous solution can encapsulate hydrophilic molecules or nanoparticles for drug and gene delivery, enhanced imaging, microreactors, or sensors. Inexpensive, biocompatible poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymers (TBCs) would be ideal for these applications if they could form concentrated vesicle solutions to encapsulate such molecules with high efficiency. It is shown that solutions of two PEO–PPO–PEO TBCs (EO5–PO68–EO5 and EO100–PO65–EO100) form vesicles, that the vesicle membranes are permeable to low‐molecular weight (MW) solutes, and that extrusion reduces the membrane permeability and MW cutoff. Osmotic permeabilities before and after extrusion are ≈1000 and ≈10 µm s−1, respectively, while the MW cutoffs for solute rejection are ≈1000 and ≈400 g mol−1. Therefore, it is hypothesized that the vesicles contain pores, and that extrusion reduces the pores' size and the membrane's porosity. These selectively permeable vesicles can function as microreactors or sensors encapsulating large solutes without the need to add channel molecules or proteins.

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Two‐Dimensional Protein Crystals for Solar Energy Conversion

Cited by 32 publications

References 33 publications

Membrane‐Intercalating Conjugated Oligoelectrolytes: Impact on Bioelectrochemical Systems

Membrane‐Intercalating Conjugated Oligoelectrolytes: Impact on Bioelectrochemical Systems

Photoelectrochemical Complexes of Fucoxanthin‐Chlorophyll Protein for Bio‐Photovoltaic Conversion with a High Open‐Circuit Photovoltage

Porous Vesicles with Extrusion‐Tunable Permeability and Pore Size from Mixed Solutions of PEO–PPO–PEO Triblock Copolymers

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