scholarly journals Waterborne Graphene- and Nanocellulose-Based Inks for Functional Conductive Films and 3D Structures

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1435
Author(s):  
Jose M. González-Domínguez ◽  
Alejandro Baigorri ◽  
Miguel Á. Álvarez-Sánchez ◽  
Eduardo Colom ◽  
Belén Villacampa ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Carbon Nanostructures ◽  
Carbon Nanomaterials ◽  
Electronic Device ◽  
Aqueous Media ◽  
High Viscosity ◽  
Resistance Surface ◽  
Conductive Films ◽  
Low Viscosity

In the vast field of conductive inks, graphene-based nanomaterials, including chemical derivatives such as graphene oxide as well as carbon nanotubes, offer important advantages as per their excellent physical properties. However, inks filled with carbon nanostructures are usually based on toxic and contaminating organic solvents or surfactants, posing serious health and environmental risks. Water is the most desirable medium for any envisioned application, thus, in this context, nanocellulose, an emerging nanomaterial, enables the dispersion of carbon nanomaterials in aqueous media within a sustainable and environmentally friendly scenario. In this work, we present the development of water-based inks made of a ternary system (graphene oxide, carbon nanotubes and nanocellulose) employing an autoclave method. Upon controlling the experimental variables, low-viscosity inks, high-viscosity pastes or self-standing hydrogels can be obtained in a tailored way. The resulting inks and pastes are further processed by spray- or rod-coating technologies into conductive films, and the hydrogels can be turned into aerogels by freeze-drying. The film properties, with respect to electrical surface resistance, surface morphology and robustness, present favorable opportunities as metal-free conductive layers in liquid-phase processed electronic device structures.

Fullerene Derivatives (CN-[OH]β) and Carbon Nanotubes Modelled as Transporters for Doxorubicin Drug in Cancer Therapy

2021 ◽  
Author(s):  
Hakim AL Garalleh
Keyword(s):  
Carbon Nanotubes ◽  
Anticancer Drugs ◽  
Carbon Nanomaterials ◽  
Aqueous Media ◽  
Medical Model ◽  
Antitumor Agent ◽  
World Health ◽  
Fullerene Derivative ◽  
Fullerene Derivatives ◽  
Health Organization

Abstract Carbon nanomaterials have received increasing attention in drug delivery applications because of their distinct properties and structures, including large surface areas, high conductivity, low solubility in aqueous media, unique chemical functionalities and stability at the nano-scale size. Particularly, they have been used as nano-carriers and mediators for anticancer drugs such as, combination with Cisplatin, Camptothecin and Doxorubicin. Cancer has become the most challenging disease because its sophisticated therapy and classified as one of the top killers according to the World health organization records. The aim of the current work is to study and investigate the mechanism of combination between single-walled carbon nanotubes (SWCNTs) and the fullerene derivatives (C N -[OH] β ) as mediators, and anticancer drugs for photodynamic therapy directly to destroy the infected cells without damaging the normal ones. Here, we obtain a bio-medical model to determine the efficiency of usefulness of Doxorubicin (DOX) as an antitumor agent conjugated with SWCNTs with variant radii r and fullerene derivative (C N -[OH] β ). The two sub-models are obtained mathematically to evaluate the potential energy arising from the DOX-SWCNT and DOX-(C N -[OH] β ) interactions. DOX modelled as two-connected spheres, small and large, each interacting with different SWCNTs (variant radii r ) and fullerene derivatives C N -[OH] β , forming based on the number of carbon atoms (N) and the number of Hydroxide molecules (OH) ( β ), respectively.

Diameter-Selective Solubilization of Carbon Nanotubes by Lipid Micelles

2008 ◽  
Vol 8 (1) ◽  
pp. 420-423 ◽  
Author(s):  
Dimitrios Tasis ◽  
Konstantinos Papagelis ◽  
Dionysios Douroumis ◽  
James R. Smith ◽  
Nikolaos Bouropoulos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Aqueous Suspension ◽  
Aqueous Media ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
One Step ◽  
The One ◽  
Walled Carbon Nanotubes

The one-step dispersion of HiPco single-walled carbon nanotubes in aqueous media with the use of a synthetic lyso-phosphatidylcholine was studied. Solubilization occurs through wrapping of lipid molecules around the circumference of the tubes, yielding lipid monolayers on the graphitic sidewalls as evidenced by atomic force microscopy imaging and dynamic light scattering measurements. Raman spectroscopy showed that the dispersion and centrifugation process leads to an effective enrichment of the stable aqueous suspension in carbon nanostructures with smaller diameters.

Nanostructured manganese oxide/carbon nanotubes, graphene and graphene oxide as water-oxidizing composites in artificial photosynthesis

2014 ◽  
Vol 43 (28) ◽  
pp. 10866-10876 ◽  
Author(s):  
Mohammad Mahdi Najafpour ◽  
Fahime Rahimi ◽  
Maryam Fathollahzadeh ◽  
Behzad Haghighi ◽  
Małgorzata Hołyńska ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Manganese Oxide ◽  
Carbon Nanostructures ◽  
Artificial Photosynthesis ◽  
Mn Oxide

Nano-sized Mn oxide/carbon nanostructures as water-oxidizing catalyts are reported.

Electrical and piezoresistive properties of cement composites with carbon nanomaterials

2018 ◽  
Vol 52 (24) ◽  
pp. 3325-3340 ◽  
Author(s):  
Doo-Yeol Yoo ◽  
Ilhwan You ◽  
Hyunchul Youn ◽  
Seung-Jung Lee
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Carbon Nanomaterials ◽  
Peak Load ◽  
Compressive Load ◽  
Gauge Factor ◽  
Fractional Change ◽  
Graphite Nanofibers ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

This study investigates the effect of nanomaterials on the piezoresistive sensing capacity of cement-based composites. Three different nanomaterials—multi-walled carbon nanotubes, graphite nanofibers, and graphene oxide—were considered along with a plain mortar, and a cyclic compressive test was performed. Based on a preliminary test, the optimum flowability was determined to be 150 mm in terms of fiber dispersion. The electrical resistivity of the composites substantially decreased by incorporating 1 wt% multi-walled carbon nanotubes, but only slightly decreased by including 1 wt% graphite nanofibers and graphene oxide. This indicates that the use of multi-walled carbon nanotubes is most effective in improving the conductivity of the composites compared to the use of graphite nanofibers and graphene oxide. The fractional change in resistivity of the composites with nanomaterials exhibited similar behavior to that of the cyclic compressive load, but partial reversibility in fractional change in resistivity was obtained beyond 60% of the peak load. A linear relationship between the fractional change in resistivity and cyclic compression strain (up to 1500 με) was observed in the composites with multi-walled carbon nanotubes, and the gauge factor was found to be 166.6. It is concluded that cement-based composites with 1 wt% multi-walled carbon nanotubes can be used as piezoresistive sensors for monitoring the stress/strain generated in concrete structures.

scholarly journals Evaluation of Addition of Carbon Nano Materials Over Properties of an Elastomeric Matrix

2021 ◽  
Vol 57 (4) ◽  
pp. 45-54
Author(s):  
Beatriz Adriana Salazar-Cruz ◽  
Jose Luis Rivera-Armenta ◽  
Cynthia Graciela Flores-Hernandez ◽  
Juventino Lopez-Barroso ◽  
Jorge Estrada-Martinez ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanostructures ◽  
Carbon Nanomaterials ◽  
Viscoelastic Behavior ◽  
Expanded Graphite ◽  
Thermal Characterization ◽  
Mechanical Analysis ◽  
Nano Particles ◽  
Elastomeric Matrix ◽  
Surface Patterns

In the present work, the effect of the addition of different types of carbon nano structures on the mechanical, thermomechanical and thermal properties of a radial structure of styrene-butadiene-styrene (SBSR) copolymer matrix is reported. Different carbon nanostructures were used as nano-rein-forcements: expanded graphite (XG), graphene oxide (GO), reduced graphene oxide (RGO) and exfo-liated graphene (EG). These carbon structures present various functional groups, such as carbonyl, epoxy, and others, which are the responsible for the interaction between the polymer matrix and the nano particles. The compatibility induced between the nanomaterials and the elastomeric matrix fa-vors the stable dispersion of the nanocomposites during their obtention process. For instance, the ad-dition of GO increased in 10 and 16% the tensile strength and storage modulus of the nanocomposites. The fracture surface patterns in the nanocomposites after the tensile test was observed by scanning electron microscopy. Also, the dynamic mechanical analysis (DMA) and thermal characterization showed differences in the viscoelastic behavior of the reinforced nanocomposites with different carbon nanomaterials.

scholarly journals Carbon Nanostructures, Nanolayers, and Their Composites

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2368
Author(s):  
Nikola Slepičková Slepičková Kasálková ◽  
Petr Slepička ◽  
Václav Švorčík
Keyword(s):  
Carbon Nanotubes ◽  
Electric Fields ◽  
Carbon Nanostructures ◽  
Carbon Nanomaterials ◽  
Carbon Materials ◽  
Biological Properties ◽  
Forms Of Carbon ◽  
The Right ◽  
Hybrid Carbon Materials ◽  
Walled Carbon Nanotubes

The versatility of the arrangement of C atoms with the formation of different allotropes and phases has led to the discovery of several new structures with unique properties. Carbon nanomaterials are currently very attractive nanomaterials due to their unique physical, chemical, and biological properties. One of these is the development of superconductivity, for example, in graphite intercalated superconductors, single-walled carbon nanotubes, B-doped diamond, etc. Not only various forms of carbon materials but also carbon-related materials have aroused extraordinary theoretical and experimental interest. Hybrid carbon materials are good candidates for high current densities at low applied electric fields due to their negative electron affinity. The right combination of two different nanostructures, CNF or carbon nanotubes and nanoparticles, has led to some very interesting sensors with applications in electrochemical biosensors, biomolecules, and pharmaceutical compounds. Carbon materials have a number of unique properties. In order to increase their potential application and applicability in different industries and under different conditions, they are often combined with other types of material (most often polymers or metals). The resulting composite materials have significantly improved properties.

A comparative study of cellular uptake and cytotoxicity of multi-walled carbon nanotubes, graphene oxide, and nanodiamond

2012 ◽  
Vol 1 (1) ◽  
pp. 62-68 ◽  
Author(s):  
Xiaoyong Zhang ◽  
Wenbing Hu ◽  
Jing Li ◽  
Lei Tao ◽  
Yen Wei
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Cellular Uptake ◽  
Hela Cells ◽  
Carbon Nanomaterials ◽  
Toxicity Assessment ◽  
Cell Uptake ◽  
Multi Walled Carbon Nanotubes ◽  
Living Organisms ◽  
Walled Carbon Nanotubes

Abstract Investigations of the interactions between carbon nanomaterials (CNMs) and living organisms and their subsequent biological responses are of fundamental significance for toxicity assessment and further biomedical applications. In this work, the cellular uptake and cytotoxicity of multi-walled carbon nanotubes (MWCNTs), graphene oxide (GO) and nanodiamond (ND) were examined and compared. We demonstrated that all of the CNMs were readily internalized by HeLa cells through nonspecific cellular uptake. Their cell uptake ratios showed significant differences in the following order: ND > MWCNTs > GO. A series of biological assays were used to evaluate the cytotoxicity of CNMs. It was found that CNMs showed dose- and time-dependent cytotoxicity to HeLa cells. However, cytotoxicity of CNMs was not associated with their cell uptake ratios. Among them, ND exhibited the highest cell uptake ratio and the least cytotoxicity. To the best of our knowledge, this is the first study which has quantitatively determined and compared the cell uptake ratios and cytotoxicities of MWCNTs, GO and ND. And we expect that these results described here could provide useful information for the development of new strategies to design efficient drug delivery nanocarriers and therapeutic systems as well as deep insights into the mechanism of CNMs' cytotoxicity.

scholarly journals Environmental Remediation Applications of Carbon Nanotubes and Graphene Oxide: Adsorption and Catalysis

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 439 ◽  
Author(s):  
Yanqing Wang ◽  
Can Pan ◽  
Wei Chu ◽  
Adavan Vipin ◽  
Ling Sun
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Environmental Remediation ◽  
Carbon Nanomaterials ◽  
Social Sustainability ◽  
Environmental Issues ◽  
The Social ◽  
Low Dimensional

Environmental issues such as the wastewater have influenced each aspect of our lives. Coupling the existing remediation solutions with exploring new functional carbon nanomaterials (e.g., carbon nanotubes, graphene oxide, graphene) by various perspectives shall open up a new venue to understand the environmental issues, phenomenon and find out the ways to get along with the nature. This review makes an attempt to provide an overview of potential environmental remediation solutions to the diverse challenges happening by using low-dimensional carbon nanomaterials and their composites as adsorbents, catalysts or catalysts support towards for the social sustainability.

Sign in / Sign up

Export Citation Format

Share Document