Article
Environmental Sciences
Krassimira Ilieva-Makulec, Anna Augustyniuk-Kram, Izabella Olejniczak, Kamil Karaban, Marek Nowicki, Tomasz Runka, Andrzej Kulczycki, Jaroslaw Kaluzny
Summary: The study found that multiwalled carbon nanotubes had a potential impact on soil organisms, especially with higher sensitivity in nematodes. Contamination by CNTs significantly affected the dynamics and diversity of soil fauna and microbial communities, potentially leading to long-term consequences for soil functioning and nutrient cycling.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Liwei Wen, Haiqing Shen, Zhuan Chen
Summary: In this study, a prepreg was prepared by melt mixing to increase the interlaminar shear strength of carbon-fiber-reinforced polymer (CFRP) composites. When only 0.5 wt% multiwalled carbon nanotube (MWCNT) was used as reinforcement, cracks were hindered and deflected by the MWCNTs during propagation, while the mechanism of MWCNTs pulling out increased the energy required for crack propagation. The reinforcement effect of adding 0.5 wt% graphene oxide (GO) alone was inferior to that of using the same amount of MWCNTs, but when a mixture of MWCNT and GO was added, the interlayer shear strength increased significantly due to the synergistic enhancement effect of the laminar structure of GO and the tubular structure of MWCNTs.
Article
Engineering, Environmental
Leema Rose Viannie, N. R. Banapurmath, Manzoore Elahi M. Soudagar, Anilkumar Nandi, Nazia Hossain, Ashwini Shellikeri, Vinita Kaulgud, Ma Mujtaba, Sher Afghan Khan, Mohammad Asif
Summary: In this study, highly flexible polymer nanocomposite sheets were successfully developed using MWCNT in a PDMS matrix via solution processing technique, showing superior electrical conductivity and stability. An optimal filler concentration of 5.58 wt% exhibited high stiffness, tensile strength, and elongation, making it suitable for fabricating flexible strain sensors.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Computer Science, Information Systems
Lukasz Pietrzak, Grzegorz Raniszewski, Lukasz Szymanski
Summary: The article describes the processes of manufacturing highly homogeneous polylactide resin/multiwalled carbon nanotubes (CNTs) and their properties. The dispersion of the nanotubes in the polymer matrix is achieved by quick polymer solidification and freezing of the dispersion state. The method used in this study allows for obtaining an electrical conductive surface on virtually any material by using a small amount of carbon nanotubes.
Article
Environmental Sciences
Ifeoluwa O. Awogbindin, Ikenna C. Maduako, Isaac A. Adedara, Solomon E. Owumi, Akinola O. Ajeleti, Olatunde Owoeye, Anita K. Patlolla, Paul B. Tchounwou, Ebenezer O. Farombi
Summary: Studies have shown that exposure to multiwalled carbon nanotubes (MWCNTs) can impair liver and kidney function in rats through oxidative stress and inflammation, while treatment with kolaviron (KV) can mitigate these effects by its anti-inflammatory and antioxidant properties.
ENVIRONMENTAL TOXICOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Emil Petrescu, Cristina Cirtoaje
Summary: By using a proper dispersion of nanotubes in the liquid crystal sample and a theoretical model, the dielectric permittivities of multiwalled carbon nanotubes are calculated, and their influence on the Freedericksz transition threshold is discussed.
Article
Materials Science, Multidisciplinary
Lei Guo, Yusong He, Dong Chen, Bin Du, Wei Cao, Yadong Lv, Zhijun Ding
Summary: In this study, nickel ferrite/multiwalled carbon nanotubes hybrids were successfully synthesized on a large scale by the hydrothermal method, and their structural, morphological, electromagnetic, and microwave absorption properties were analyzed in detail. The optimized sample exhibited excellent microwave absorption performance, indicating great potential for practical applications.
Article
Polymer Science
Xue Lei, Mei Liang, Huawei Zou, Shengtai Zhou
Summary: The objective of this study was to investigate the influence of shear rates on the properties of polyamide 6/multiwalled carbon nanotube composites. It was found that high shearing conditions in injection molding were unfavorable for the formation of intact filler network, resulting in lower electrical conductivity. A better filler distribution was observed under higher shearing conditions. Moreover, the tensile strength of the injection molded samples increased with higher filler concentrations, attributed to the preferential orientation and better distribution of carbon nanotubes.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Byungcheon Yoo, Ziwei Xu, Feng Ding
Summary: High-pressure carbon monoxide (HiPCO) synthesized single-walled carbon nanotubes (SWCNTs) were heat treated at high temperatures, resulting in an increase in diameter and the formation of double-, triple-, and multi-walled carbon nanotubes (MWCNTs). Most MWCNTs were found to have an odd number of walls, in accordance with the mechanism of SWCNT bundle coalescence.
Article
Chemistry, Multidisciplinary
Arya Uthaman, Hiran Mayookh Lal, Chenggao Li, Guijun Xian, Sabu Thomas
Summary: The study investigated the thermal, mechanical, and water uptake properties of epoxy nanocomposites with surfactant-modified MWCNTs, showing that the addition of surfactant-modified CNTs into the epoxy significantly improved mechanical and thermal properties. However, excessive concentration of CNTs led to agglomeration and decreased the performance of the nanocomposites.
Article
Chemistry, Physical
Pawel Smolen, Tomasz Czujko, Zenon Komorek, Dominik Grochala, Anna Rutkowska, Malgorzata Osiewicz-Powezka
Summary: This study successfully obtained electrically conductive materials by adding functionalized multiwalled carbon nanotubes, and confirmed that carbon nanotubes as polymer reinforcements can increase tensile strength and strain percentage. However, increasing nanofiller percentages resulted in a drastic decrease in Young's modulus values.
Article
Materials Science, Multidisciplinary
Kun-Tse Yang, Je-Chuan Hsu, Fuqian Yang, Sanboh Lee
Summary: This study investigated the effects of UV light irradiation on multiwall-carbon-nanotube reinforced poly(methyl methacrylate) composites, focusing on changes in glass transition temperature and mechanical properties. The addition of MWCNTs increased the glass transition temperature of the composites, but UV irradiation negatively affected the properties. The research presented a simple equation to calculate the effective modulus of the composites and found that toughness and elongation were higher in composites without UV irradiation.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Energy & Fuels
Dharmendra Kumar Yadav, Fatin Saiha Omar, Mamta Yadav, Xian Liang Ho, Malcolm E. Tessensohn, K. Ramesh, S. Ramesh, Richard D. Webster, Vellaichamy Ganesan
Summary: In the field of renewable energy research, MWCNTs-ZrO2-Co3O4 has been successfully employed as a catalyst and supercapacitor material, demonstrating efficient and stable performance.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Paper & Wood
Vasuki Durairaj, Touko Liljestrom, Niklas Wester, Peter Engelhardt, Sami Sainio, Benjamin P. Wilson, Panpan Li, Katri S. Kontturi, Tekla Tammelin, Tomi Laurila, Jari Koskinen
Summary: This study comprehensively investigates the influence of nanocellulosic material properties on the electroanalytical performance of nanocellulose/CNT hybrid electrodes. By manipulating the functionalization and geometry of cellulose nanocrystals, cellulose nanofibers, and TEMPO-oxidized cellulose nanofibers, the optimal combination for hybrid electrode performance is determined. This research demonstrates for the first time the tunability of nanocellulose/CNT hybrid electrodes towards different biomolecules through the selection of nanocellulosic materials.
Article
Materials Science, Multidisciplinary
Emilia Gradzka, Piotr Dluzewski, Izabela Wigda, Monika Wysocka-Zolopa, Krzysztof Winkler
Summary: The electrochemical behavior of the ternary composite is influenced by the relative amounts of polypyrrole, multiwalled carbon nanotubes, and tetra(n-octyl)ammonium bromide, resulting in enhanced capacitance and stability.
Article
Computer Science, Information Systems
Daniele Capista, Maurizio Passacantando, Luca Lozzi, Enver Faella, Filippo Giubileo, Antonio Di Bartolomeo
Summary: A simple method is proposed for fabricating a photodetector based on the carbon nanotube/silicon nitride/silicon (CNT/Si3N4/Si) heterojunction. The method avoids the thermal stress caused by chemical vapor deposition and uses a carbon nanotube film as the charge collecting electrode to ensure uniform photocurrent across the device's sensitive area.
Article
Nanoscience & Nanotechnology
Luca Camilli, Daniele Capista, Piergiorgio Eramo, Angelo Antonio D'Archivio, Maria Anna Maggi, Andrea Lazzarini, Marcello Crucianelli, Maurizio Passacantando
Summary: Clean water is crucial for ecosystems, human life, and socio-economic development. However, climate change, pollution, and population growth may lead to water scarcity. Therefore, it is important to develop new materials and efficient methods for treating waste and contaminated water. A recent study discovered that by treating carbon nanotube sponges at mild temperatures, the sponges can become hydrophilic and effectively remove toxic contaminants dissolved in water.
Article
Optics
Francesco Reda, Marcella Salvatore, Fabio Borbone, Pasqualino Maddalena, Antonio Ambrosio, Stefano Luigi Oscurato
Summary: This research demonstrates the realization of a fully reconfigurable flat varifocal diffractive lens, which can be directly manufactured, erased, and reshaped on the surface of an azopolymer film. Integrating the lens into the optical system allows for multi-depth object imaging. This approach provides an effective choice for integrating or substituting modern optical systems for advanced functionalities.
Article
Nanoscience & Nanotechnology
Filippo Giubileo, Enver Faella, Aniello Pelella, Arun Kumar, Daniele Capista, Maurizio Passacantando, Sang Sub Kim, Antonio Di Bartolomeo
Summary: The field emission properties of SnO2 nanofiber networks have been systematically investigated, demonstrating a field emission current at low electric fields, and a maximum field enhancement factor at a separation distance of 200 nm. The emission from a single nanofiber shows current saturation.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Adriana Pecoraro, Pasqualino Maddalena, Michele Pavone, Ana B. Munoz Garcia
Summary: This paper investigates the challenges faced by perovskite solar cells and dye-sensitized solar cells, and proposes alternative materials. By using density functional theory, the structural and electronic properties of three potential p-type semiconductors are compared with existing materials. The study reveals the significant impact of defects on charge transport in the devices.
Article
Nanoscience & Nanotechnology
Filippo Giubileo, Daniele Capista, Enver Faella, Aniello Pelella, Woo Young Kim, Paola Benassi, Maurizio Passacantando, Antonio Di Bartolomeo
Summary: This experimental study investigates the field emission properties of commercially available graphene flowers cloth. Material characterization confirms the formation of high-quality vertical few-layers graphene nanosheets. The results demonstrate a low turn-on field and a high field enhancement factor in a small cathode-anode separation distance range. The study also shows that the turn-on field increases with distance while the field enhancement factor decreases. Additionally, the time stability of the field emission current is reported.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Serena Pilato, Samanta Moffa, Gabriella Siani, Francesca Diomede, Oriana Trubiani, Jacopo Pizzicannella, Daniele Capista, Maurizio Passacantando, Paolo Samori, Antonella Fontana
Summary: The development of novel three-dimensional (3D) nanomaterials with high biocompatibility, precise mechanical characteristics, electrical conductivity, and controlled pore size is highly sought after for cardiac tissue engineering applications. Hybrid, highly porous tridimensional scaffolds based on chemically functionalized graphene oxide (GO) can provide these unique characteristics and be manufactured using the layer-by-layer technique.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Marcella Salvatore, Francesco Reda, Fabio Borbone, I. Komang Januariyasa, Pasqualino Maddalena, Stefano Luigi Oscurato
Summary: We propose a simple diffractive method for measuring the refractive index of homogeneous solid thin films by structuring the surface with a diffraction grating. The refractive index of a soft-moldable material is successfully estimated by incorporating the measured topography and diffraction efficiency of the grating into a scalar theory-based diffraction model. This method provides a simple and widely accessible optical characterization of materials, useful in material science and photonics applications, without the need for specialized expertise and equipment.
Article
Chemistry, Multidisciplinary
Daniele Capista, Luca Lozzi, Aniello Pelella, Antonio Di Bartolomeo, Filippo Giubileo, Maurizio Passacantando
Summary: Photodetectors based on vertical multi-walled carbon nanotube (MWCNT) film-Si heterojunctions are successfully achieved by growing MWCNTs on n-type Si substrates covered with Si3N4 layers. Spatially resolved photocurrent measurements demonstrate that higher photo detection is achieved in regions with thinner MWCNT film, resulting in nearly 100% external quantum efficiency. Therefore, a simple method utilizing scotch tape is proposed to tune the thickness and density of the as-grown MWCNT film, thereby enhancing the device photo-response.
Article
Nanoscience & Nanotechnology
Kimberly Intonti, Enver Faella, Loredana Viscardi, Arun Kumar, Ofelia Durante, Filippo Giubileo, Maurizio Passacantando, Hoi Tung Lam, Konstantinos Anastasiou, Monica F. Craciun, Saverio Russo, Antonio Di Bartolomeo
Summary: This study reports the optoelectronic characterization of few-layer ReSe2 field effect transistors at different pressures. The devices exhibit a dominant n-type behavior with low Schottky barrier and significant hysteresis. The conductance and mobility of the devices are affected by air pressure, increasing with lower pressure due to the desorption of electronegative air molecules. The photoresponse of the device changes from positive photoconductivity at higher pressure to negative photoconductivity at lower pressure, which can be explained by the desorption of molecules and the defect trapping of photogenerated carriers.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Gennaro Vincenzo Sannino, Adriana Pecoraro, Pasqualino Maddalena, Annalisa Bruno, Paola Delli Veneri, Michele Pavone, Ana Belen Munoz-Garcia
Summary: Recent experiments have shown that moderate Mg doping in SnO2 plays a beneficial role in perovskite solar cells. Density functional theory calculations reveal that low Mg contents increase the open circuit potential (V-OC) by pushing up the conduction band minimum (CBM) of SnO2, while high dopant concentration leads to interstitial Mg defects and the formation of intra-gap band states, resulting in lower V-OC and decreased performance of the solar cells. These findings provide new insights into the effects of Mg doping in SnO2 and highlight the tunable structural and defect properties for tailored electronic features in ETL materials.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Nanoscience & Nanotechnology
Serena Pilato, Samanta Moffa, Gabriella Siani, Francesca Diomede, Oriana Trubiani, Jacopo Pizzicannella, Daniele Capista, Maurizio Passacantando, Paolo Samori, Antonella Fontana
Summary: The development of 3D nanomaterials with high biocompatibility, precise mechanical characteristics, electrical conductivity, and controlled pore size is crucial for cardiac tissue engineering applications. Hybrid, highly porous tridimensional scaffolds based on chemically functionalized graphene oxide (GO) offer enhanced compositional and structural control. These scaffolds are biocompatible, promote cell adhesion and growth without interfering with cell morphology and cardiac markers, and can be used for repairing damaged heart tissues and cardiac modeling investigations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Marcella Salvatore, Francesco Reda, Fabio Borbone, Pasqualino Maddalena, Stefano Luigi Oscurato
Summary: Multiplexing is a method of combining multiple information in a common medium. The use of Azopolymer in photolithographic applications allows for the direct photo-structuring of the material over large scales with high quality. This method provides a suitable platform for encoding multiplexed information in a topographic surface relief pattern. The fabrication of multiplexed azopolymer surface relief gratings through a computer controlled holographic illumination system is demonstrated here, showing the potential for structured surfaces that can convert multiple information in a single complex topographic profile.
PHOTOSENSITIVE MATERIALS AND THEIR APPLICATIONS II
(2022)
Article
Materials Science, Multidisciplinary
Francesco Reda, Marcella Salvatore, Fabio Borbone, Pasqualino Maddalena, Stefano L. Oscurato
Summary: This study characterizes the temporal evolution of surface relief gratings (SRGs) fabricated using interference lithography, and proposes a simple yet detailed diffraction model to accurately describe the diffraction behavior of SRGs. By conducting Fourier analysis of surface profiles, a reliable surface structuration dynamics is empirically extracted, providing insights for improving the performance and application of SRGs.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Physical
Luca Camilli, Daniele Capista, Massimo Tomellini, Jianbo Sun, Patrick Zeller, Matteo Amati, Luca Gregoratti, Luca Lozzi, Maurizio Passacantando
Summary: We investigate the oxidation mechanism of GeAs and find that a Ge-rich ultrathin oxide film is formed on the surface while As leaves upon oxidation. A theoretical model suggests that the activation energy for As oxidation is almost twice that for Ge at room temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
