Lead sulfide quantum dots inside ferritin: synthesis and application to photovoltaics

Hansen, Kameron R.; Peterson, James R.; Perego, Alessandro; Shelley, Micah; Olsen, Cameron; Perez, Luis D.; Hogg, Heather; Watt, Richard K.; Colton, John

doi:10.1007/s13204-018-0849-y

Cited by 4 publications

(2 citation statements)

References 78 publications

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“…This synthesis may mimic the work done by Zhai et al where they deposited AgNPs on the surface of silica spheres to stabilize the AgNPs but preserve the nanoparticle catalytic properties [40]. Ferritin synthesized with other metal nanoparticles encapsulated inside ferritin are also capable of performing the photochemical charge separation reactions [41][42][43][44][45]. We chose to test the surface reactivity of the Ferritin-AgNPs (Ftn-AgNPs) by analyzing the antimicrobial activity of these nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

A Ferritin Photochemical Synthesis of Monodispersed Silver Nanoparticles That Possess Antimicrobial Properties

Petrucci

Hilton

Farrer

et al. 2019

Journal of Nanomaterials

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We previously reported that ferritin acts as a photocatalyst to form monodispersed gold nanoparticles. Because silver possesses a favorable reduction potential (+0.80 V), we postulated that the ferritin photochemical method could be used to reduce Ag(I) to Ag(0). Additionally, we postulated that similar to gold, the reduced silver should nucleate and form silver nanoparticles (AgNPs) on the external surface of ferritin. This study reports that Ag(I) can function as an electron acceptor to form monodispersed AgNPs using the ferritin photocatalytic method. The formation and growth of the AgNPs were monitored by following the surface plasmon resonance (SPR) peak at 420 nm by spectrophotometry. The resulting monodispersed AgNPs were analyzed by transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDX). Gel filtration chromatography demonstrated that the AgNPs comigrated with ferritin through the column suggesting a strong association with ferritin. AgNPs are known to possess antimicrobial properties. The antimicrobial properties of Ferritin-AgNPs were compared to commercially available AgNPs by testing the minimal growth inhibition of Staphylococcus aureus. Commercially available AgNPs inhibited bacterial growth at 5 ppm AgNPs, and Ferritin-AgNPs inhibited growth at 20 ppm Ferritin-AgNPs.

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Section: Introductionmentioning

confidence: 99%

A Ferritin Photochemical Synthesis of Monodispersed Silver Nanoparticles That Possess Antimicrobial Properties

Petrucci

Hilton

Farrer

et al. 2019

Journal of Nanomaterials

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“…PbS quantum dots were synthesized inside ferritin protein shells by Hansen et al, which protected them from photocorrosion, resulting in quantum dot sensitized solar cells with mesoporous TiO 2 , giving efficiencies of around 0.29% when a drop casting method was used [77].…”

Section: Pbs Quantum Dot Sensitized Solar Cellsmentioning

confidence: 99%

Recent Developments of Solar Cells from PbS Colloidal Quantum Dots

Błachowicz

Ehrmann

2020

Applied Sciences

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PbS (lead sulfide) colloidal quantum dots consist of crystallites with diameters in the nanometer range with organic molecules on their surfaces, partly with additional metal complexes as ligands. These surface molecules are responsible for solubility and prevent aggregation, but the interface between semiconductor quantum dots and ligands also influences the electronic structure. PbS quantum dots are especially interesting for optoelectronic applications and spectroscopic techniques, including photoluminescence, photodiodes and solar cells. Here we concentrate on the latter, giving an overview of the optical properties of solar cells prepared with PbS colloidal quantum dots, produced by different methods and combined with diverse other materials, to reach high efficiencies and fill factors.

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Ferritin: A Promising Nanoreactor and Nanocarrier for Bionanotechnology

Mohanty

Parida

Raut

et al. 2022

ACS Bio Med Chem Au

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The essence of bionanotechnology lies in the application of nanotechnology/nanomaterials to solve the biological problems. Quantum dots and nanoparticles hold potential biomedical applications, but their inherent problems such as low solubility and associated toxicity due to their interactions at nonspecific target sites is a major concern. The self-assembled, thermostable, ferritin protein nanocages possessing natural iron scavenging ability have emerged as a potential solution to all the above-mentioned problems by acting as nanoreactor and nanocarrier. Ferritins, the cellular iron repositories, are hollow, spherical, symmetric multimeric protein nanocages, which sequester the excess of free Fe(II) and synthesize iron biominerals (Fe2O3·H2O) inside their ∼5–8 nm central cavity. The electrostatics and dynamics of the pore residues not only drives the natural substrate Fe2+ inside ferritin nanocages but also uptakes a set of other metals ions/counterions during in vitro synthesis of nanomaterial. The current review aims to report the recent developments/understanding on ferritin structure (self-assembly, surface/pores electrostatics, metal ion binding sites) and chemistry occurring inside these supramolecular protein cages (protein mediated metal ion uptake and mineralization/nanoparticle formation) along with its surface modification to exploit them for various nanobiotechnological applications. Furthermore, a better understanding of ferritin self-assembly would be highly useful for optimizing the incorporation of nanomaterials via the disassembly/reassembly approach. Several studies have reported the successful engineering of these ferritin protein nanocages in order to utilize them as potential nanoreactor for synthesizing/incorporating nanoparticles and as nanocarrier for delivering imaging agents/drugs at cell specific target sites. Therefore, the combination of nanoscience (nanomaterials) and bioscience (ferritin protein) projects several benefits for various applications ranging from electronics to medicine.

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Lead sulfide quantum dots inside ferritin: synthesis and application to photovoltaics

Cited by 4 publications

References 78 publications

A Ferritin Photochemical Synthesis of Monodispersed Silver Nanoparticles That Possess Antimicrobial Properties

A Ferritin Photochemical Synthesis of Monodispersed Silver Nanoparticles That Possess Antimicrobial Properties

Recent Developments of Solar Cells from PbS Colloidal Quantum Dots

Ferritin: A Promising Nanoreactor and Nanocarrier for Bionanotechnology

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