Influence of solvents on the morphology of Langmuir and Langmuir–Schaefer films of PCBM and PCBM-based oligomers and polymers

Roncaselli, Lucas Kaique Martins; Silva, Edilene Assunção da; Braunger, Maria Luisa; Ramanitra, Hasina H.; Stephen, Meera; Lima, Lucas Kennedy Silva; Fernandes, José Diego; Simõis, André Vítor Santos; Constantino, Carlos J. L.; Agostini, Deuber Lincon da Silva; Bégué, Didier; Hiorns, Roger C.; Olivati, Clarissa de Almeida

doi:10.1039/d1cp05408b

Phys. Chem. Chem. Phys.

2022

DOI: 10.1039/d1cp05408b

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Influence of solvents on the morphology of Langmuir and Langmuir–Schaefer films of PCBM and PCBM-based oligomers and polymers

Lucas Kaique Martins Roncaselli

Edilene Assunção da Silva²,

Maria Luisa Braunger

et al.

Abstract: Fullerente-based polymers and oligomers combine with non-fullerene acceptors are showing extremely high efficiencies in organic photovoltaic devices. Furthermore, these materials are of interest for use in anti-cancer and anti-viral treatments,...

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Cited by 2 publications

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Fabrication and characterization of poly(fullerene) thin films for gas sensors

Simõis,

Borro,

Medina

et al. 2024

Polymer International

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Ammonia, despite being a naturally generated compound in the metabolic process, can be harmful to health in higher concentrations. In this context, sensor devices are directly related to health and safety measurements to detect the presence of such substances. In this work, we study materials derived from fullerene, a material with a high electron affinity. We characterize three fullerene derivatives, namely PCBM, OPCBMMB and PPCBMB, and verify their applicability as ammonia sensors. The materials were studied in the form of thin films, produced by Langmuir–Schaefer and drop‐casting techniques. Optical characterization was performed using UV–visible spectroscopy while morphological characteristics were studied using atomic force microscopy (AFM) and optical microscopy (OM). Current versus voltage and current versus time measurements were performed in order to determine the films' conductivities, electrical resistances and gas‐sensing properties. UV–visible absorption was observed at lower wavelengths, with peaks in the UV region. In the electrical measurements, differences were observed between the deposition techniques, with the Langmuir–Schaefer films showing a higher conductivity than the drop‐casting films. AFM and OM also showed differences in the film surfaces between the techniques, with a rougher surface on the drop‐casting films. When exposed to ammonia, the materials showed electrical responses at every cycle, with a significant increase in their electrical responses. © 2024 Society of Chemical Industry.

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Fabrication and characterization of poly(fullerene) thin films for gas sensors

Simõis,

Borro,

Medina

et al. 2024

Polymer International

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Solvent Impact on Langmuir and Langmuir–Schaefer Films of Soluble Main‐Chain Poly(fullerene)s Based on C₆₀

de Lima Citolino,

Santos Silva,

Silva Agostini

et al. 2023

Physica Rapid Research Ltrs

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Understanding the morphology and electronic properties of poly(fullerene)s is crucial for the development of new organic devices. This work addresses the fabrication and characterization of Langmuir–Schaefer (LS) films of poly(fullerene)s based on C60 with short (HSS8) and long (HSS16) sidechains, solubilized in chloroform or xylene. In addition, density functional theory (DFT) calculations are used to optimize the molecular geometries, determine energies, and investigate the influence of solvent applied. Depending on the organic solvent, floating material isotherms indicate the formation of disordered aggregates in the aqueous subphase. The influence of solvent in LS films is also evidenced by way of atomic force microscopy (AFM), UV‐vis, and cyclic voltammetry (CV) measurements. From DFT calculations, the arms of the poly(fullerene)s start to extend from an initial position of surrounding the fullerene sphere. In AFM measurements, depending on the organic solvent, the roughness significantly reduces, while the homogeneity is much higher. In UV‐vis and CV measurements, the propensity to form aggregates depends mainly on the polarization of the solvent and is directly related to the maximum absorption, oxidation, and reduction peaks. From the optical bandgap energy values, the poly(fullerene)s studied here present high potential for application in organic electronic devices.

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Influence of solvents on the morphology of Langmuir and Langmuir–Schaefer films of PCBM and PCBM-based oligomers and polymers

Abstract: Fullerente-based polymers and oligomers combine with non-fullerene acceptors are showing extremely high efficiencies in organic photovoltaic devices. Furthermore, these materials are of interest for use in anti-cancer and anti-viral treatments,...

Cited by 2 publications

References 78 publications

Fabrication and characterization of poly(fullerene) thin films for gas sensors

Fabrication and characterization of poly(fullerene) thin films for gas sensors

Solvent Impact on Langmuir and Langmuir–Schaefer Films of Soluble Main‐Chain Poly(fullerene)s Based on C₆₀

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Influence of solvents on the morphology of Langmuir and Langmuir–Schaefer films of PCBM and PCBM-based oligomers and polymers

Abstract: Fullerente-based polymers and oligomers combine with non-fullerene acceptors are showing extremely high efficiencies in organic photovoltaic devices. Furthermore, these materials are of interest for use in anti-cancer and anti-viral treatments,...

Cited by 2 publications

References 78 publications

Fabrication and characterization of poly(fullerene) thin films for gas sensors

Fabrication and characterization of poly(fullerene) thin films for gas sensors

Solvent Impact on Langmuir and Langmuir–Schaefer Films of Soluble Main‐Chain Poly(fullerene)s Based on C60

Contact Info

Product

Resources

About

Solvent Impact on Langmuir and Langmuir–Schaefer Films of Soluble Main‐Chain Poly(fullerene)s Based on C₆₀