Bernardo R. A. Neves
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View article: Optical properties of cicada wings covered by graphene studied by nano‐Raman spectroscopy
Optical properties of cicada wings covered by graphene studied by nano‐Raman spectroscopy Open
Some biological systems exhibit nanoscale constructions to produce optical effects. This study utilises Atomic Force Microscopy (AFM) and Tip‐Enhanced Raman Spectroscopy (TERS) to study the complex bionanometric structure of cicada wings. …
View article: Nano-Raman Spectroscopy Figure of Merit and Chemical Analysis of Contaminations in Single-Layer MoSe<sub>2</sub>
Nano-Raman Spectroscopy Figure of Merit and Chemical Analysis of Contaminations in Single-Layer MoSe<sub>2</sub> Open
Contaminations in the formation of two-dimensional heterostructures can hinder or generate the desired properties. Recent advancements have highlighted the potential of tip-enhanced Raman spectroscopy (TERS) for studying materials in the 2…
View article: Self-Assembled Sodium Dodecyl Sulfate Structures on Mineral Surfaces Following Rapid Solvent Removal
Self-Assembled Sodium Dodecyl Sulfate Structures on Mineral Surfaces Following Rapid Solvent Removal Open
Sodium dodecyl sulfate (SDS) is a widely used surfactant with applications ranging from detergents to cell lysis and nanomaterial exfoliation. Additionally, SDS can form self-assembled structures on different substrates under specific cond…
View article: Probing the interactions in graphene oxide/MoS<sub>2</sub> and reduced graphene oxide/MoS<sub>2</sub> nanoarchitectures using multimodal scanning probe microscopy
Probing the interactions in graphene oxide/MoS<sub>2</sub> and reduced graphene oxide/MoS<sub>2</sub> nanoarchitectures using multimodal scanning probe microscopy Open
A set of SPM techniques helped in identifying different interactions between 2D/2D nanoarchitected thin films (GO/MoS 2 and rGO/MoS 2 ). Notably, the incorporation of MoS 2 led to several alterations in the properties of neat GO or rGO fil…
View article: Corrigendum: Random cellulose acetate nanofibers: a breakthrough for cultivated meat production
Corrigendum: Random cellulose acetate nanofibers: a breakthrough for cultivated meat production Open
[This corrects the article DOI: 10.3389/fnut.2023.1297926.].
View article: Nano-optical investigation of grain boundaries, strain and edges in CVD grown MoS$_{2}$ monolayers
Nano-optical investigation of grain boundaries, strain and edges in CVD grown MoS$_{2}$ monolayers Open
The role of defects in two-dimensional semiconductors and how they affect the intrinsic properties of these materials have been a wide researched topic over the past decades. Optical characterization such as photoluminescence and Raman spe…
View article: Random cellulose acetate nanofibers: a breakthrough for cultivated meat production
Random cellulose acetate nanofibers: a breakthrough for cultivated meat production Open
Overcoming the challenge of creating thick, tissue-resembling muscle constructs is paramount in the field of cultivated meat production. This study investigates the remarkable potential of random cellulose acetate nanofibers (CAN) as a tra…
View article: Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit
Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit Open
Phyllosilicate minerals are an emerging class of naturally occurring layered insulators with large bandgap energy that have gained attention from the scientific community. This class of lamellar materials has been recently explored at the …
View article: Controlled Release and Cell Viability of Ketoconazole Incorporated in PEG 4000 Derivatives
Controlled Release and Cell Viability of Ketoconazole Incorporated in PEG 4000 Derivatives Open
In recent years, polymeric materials have been gaining prominence in studies of controlled release systems to obtain improvements in drug administration. These systems present several advantages compared with conventional release systems, …
View article: Carbon nanotube-cellulose ink for rapid solvent identification
Carbon nanotube-cellulose ink for rapid solvent identification Open
In this work, a conductive ink based on microfibrillated cellulose (MFC) and multiwalled carbon nanotubes (MWCNTs) was used to produce transducers for rapid liquid identification. The transducers are simple resistive devices that can be ea…
View article: High-pressure studies of atomically thin van der Waals materials
High-pressure studies of atomically thin van der Waals materials Open
Two-dimensional (2D) materials and their moiré superlattices represent a new frontier for quantum matter research due to the emergent properties associated with their reduced dimensionality and extreme tunability. The properties of these a…
View article: Locally-enhanced optical properties in a hybrid organic/inorganic (coronene/MoS<sub>2</sub>) Van der Waals heterostructure
Locally-enhanced optical properties in a hybrid organic/inorganic (coronene/MoS<sub>2</sub>) Van der Waals heterostructure Open
Hybrid organic/inorganic Van der Waals heterostructures have emerged recently with enormous potential applications in nanotechnology and industrial areas. In these heterostructures, the interfacial effects can modulate the final properties…
View article: Liquid phase exfoliation of talc: effect of the medium on flake size and shape
Liquid phase exfoliation of talc: effect of the medium on flake size and shape Open
Industrial applications of nanomaterials require large-scale production methods, such as liquid phase exfoliation (LPE). Regarding this, it is imperative to characterize the obtained materials to tailor parameters such as exfoliation mediu…
View article: Carbon nanotube-cellulose ink for rapid liquid identification
Carbon nanotube-cellulose ink for rapid liquid identification Open
In this work, a conductive ink based on micro fibrillated cellulose (MFC) and multi-walled carbon nanotubes (MWCNT) was used to produce transducers for rapid liquid identification. The transducers are simple resistive devices that can be e…
View article: Evaluation of Anti-Candida albicans Activity and Release of Ketoconazole in PMMA-G-PEG 4000 Films
Evaluation of Anti-Candida albicans Activity and Release of Ketoconazole in PMMA-G-PEG 4000 Films Open
Modified release systems depend on the selection of an appropriate agent capable of controlling the release of the drug, sustaining the therapeutic action over time, and/or releasing the drug at the level of a particular tissue or target o…
View article: Aerosol-Printed MoS<sub>2</sub> Ink as a High Sensitivity Humidity Sensor
Aerosol-Printed MoS<sub>2</sub> Ink as a High Sensitivity Humidity Sensor Open
[Image: see text] Molybdenum disulfide (MoS(2)) is attractive for use in next-generation nanoelectronic devices and exhibits great potential for humidity sensing applications. Herein, MoS(2) ink was successfully prepared via a simple exfol…
View article: New Studies In vitro Antibacterial Evaluation and Cell viability in PMMA-G-PEG 4000 Derivatives with Encapsulated Erythromycin
New Studies In vitro Antibacterial Evaluation and Cell viability in PMMA-G-PEG 4000 Derivatives with Encapsulated Erythromycin Open
Synthetic polymers have been extensively studied in several areas of knowledge, one of which is the pharmaceutical.The drug when encapsultated into the PMMA-g-PEG 4000 matrix can produce fewer side effects.The most frequent side effects of…
View article: Photoluminescence and charge transfer in the prototypical 2D/3D semiconductor heterostructure MoS2/GaAs
Photoluminescence and charge transfer in the prototypical 2D/3D semiconductor heterostructure MoS2/GaAs Open
The new generation of two-dimensional (2D) materials has shown a broad range of applications for optical and electronic devices. Understanding the properties of these materials when integrated with more traditional three-dimensional (3D) s…
View article: Physical-Chemical Effects of Nanoparticles on Electropolymerized Polyaniline
Physical-Chemical Effects of Nanoparticles on Electropolymerized Polyaniline Open
The incorporation of nanoparticles on polymer films is possible to obtain materials with desired properties. In the present work, we address the physical-chemical influence of nanoparticles in polymer films by producing and characterizing …
View article: Electromechanical Modulations in Transition Metal Dichalcogenide Nanosheets: Implications for Environmental Sensors
Electromechanical Modulations in Transition Metal Dichalcogenide Nanosheets: Implications for Environmental Sensors Open
Transition metal dichalcogenides (TMDs) are key players in the two-dimensional materials nanoarena due to their exquisite optoelectronic properties under a standard environment (room temperature and atmospheric pressure). Nevertheless, as …
View article: Two-dimensional talc as a van der Waals material for solid lubrication at the nanoscale
Two-dimensional talc as a van der Waals material for solid lubrication at the nanoscale Open
Talc is a van der Waals and naturally abundant mineral with the chemical formula Mg 3 Si 4 O 10 (OH) 2 . Two-dimensional (2D) talc could be an alternative to hBN as van der Waals dielectric in 2D heterostructures. Furthermore, due to its g…
View article: Mapping the local dielectric constant of a biological nanostructured system
Mapping the local dielectric constant of a biological nanostructured system Open
The aim of this work is to determine the varying dielectric constant of a biological nanostructured system via electrostatic force microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the die…
View article: Trypanocidal Activity and Increased Solubility of Benznidazole Incorporated in PEG 4000 and Its Derivatives
Trypanocidal Activity and Increased Solubility of Benznidazole Incorporated in PEG 4000 and Its Derivatives Open
Selecting a polymer depends on its characteristics, the properties of the drug and of the remaining ingredients in the formulation. The drug, when incorporated into a polymeric matrix, can show several advantages when compared with its con…
View article: Novel PEG 4000 derivatives and its use in controlled release of drug indomethacin
Novel PEG 4000 derivatives and its use in controlled release of drug indomethacin Open
The insertion of functional groups in polymer compounds may facilitate their interaction with different drugs. PEG polymers are widely used for their low melting point, low toxicity, drug compatibility, and hydrophilicity. They are used as…
View article: Nanomechanics of few-layer materials: do individual layers slide upon folding?
Nanomechanics of few-layer materials: do individual layers slide upon folding? Open
Folds naturally appear on nanometrically thin materials, also called “2D materials”, after exfoliation, eventually creating folded edges across the resulting flakes. We investigate the adhesion and flexural properties of single-layered and…
View article: Mapping the local dielectric constant of a bio‑nanostructured system
Mapping the local dielectric constant of a bio‑nanostructured system Open
The aim of this work is to determine the dielectric constant value of a bio-nanostructured system via Electrostatic Force Microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the dielectric c…
View article: Nanomechanics of few-layer materials: do individual layers slide upon folding?
Nanomechanics of few-layer materials: do individual layers slide upon folding? Open
Folds naturally appear on nanometrically thin (also called 2D) materials after exfoliation, eventually creating folded edges across the resulting flakes. In the present work, we investigate the adhesion and flexural properties of single an…