scholarly journals Special Issue on New Carbon Materials from Biomass and Their Applications

2021 ◽  
Vol 11 (6) ◽  
pp. 2453
Author(s):  
Jorge Bedia ◽  
Carolina Belver
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Materials ◽  
Activated Carbons ◽  
Graphene Nanosheets ◽  
Two Dimensional ◽  
Special Issue ◽  
One Dimensional ◽  
New Carbon Materials ◽  
Carbon Based

Carbon-based materials, such as chars, activated carbons, one-dimensional carbon nanotubes, and two-dimensional graphene nanosheets, have shown great potential for a wide variety of applications [...]

scholarly journals Carbons from Biomasic Waste and their Applications

2019 ◽  
Vol 5 (4) ◽  
pp. 59
Author(s):  
Bedia ◽  
Belver
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbons ◽  
Graphene Nanosheets ◽  
Two Dimensional ◽  
One Dimensional ◽  
Carbon Based

Carbon-based materials, such as chars, activated carbons, one-dimensional carbon nanotubes, and two-dimensional graphene nanosheets, have shown great potential for a wide variety of applications[...]

scholarly journals Fracture toughness of one- and two-dimensional nanoreinforced cement via scratch testing

2021 ◽  
Vol 379 (2203) ◽  
pp. 20200288 ◽  
Author(s):  
Ange-Therese Akono
Keyword(s):  
Carbon Nanotubes ◽  
Fracture Toughness ◽  
Cement Industry ◽  
Vertical Force ◽  
Two Dimensional ◽  
Scratch Testing ◽  
Helical Carbon Nanotubes ◽  
Reinforced Cement ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Cement is the most widely consumed material globally, with the cement industry accounting for 8% of human-caused greenhouse gas emissions. Aiming for cement composites with a reduced carbon footprint, this study investigates the potential of nanomaterials to improve mechanical characteristics. An important question is to increase the fraction of carbon-based nanomaterials within cement matrices while controlling the microstructure and enhancing the mechanical performance. Specifically, this study investigates the fracture response of Portland cement reinforced with one- and two-dimensional carbon-based nanomaterials, such as carbon nanofibres, multiwalled carbon nanotubes, helical carbon nanotubes and graphene oxide nanoplatelets. Novel processing routes are shown to incorporate 0.1–0.5 wt% of nanomaterials into cement using a quadratic distribution of ultrasonic energy. Scratch testing is used to probe the fracture response by pushing a sphero-conical probe against the surface of the material under a linearly increasing vertical force. Fracture toughness is then computed using a nonlinear fracture mechanics model. Nanomaterials are shown to bridge nanoscale air voids, leading to pore refinement, and a decrease in the porosity and the water absorption. An improvement in fracture toughness is observed in cement nanocomposites, with a positive correlation between the fracture toughness and the mass fraction of nanofiller for graphene-reinforced cement. Moreover, for graphene-reinforced cement, the fracture toughness values are in the range of 0.701 to 0.717 MPa m . Thus, this study illustrates the potential of nanomaterials to toughen cement while improving the microstructure and water resistance properties. This article is part of a discussion meeting issue ‘A cracking approach to inventing new tough materials: fracture stranger than friction’.

scholarly journals Recent developments in carbon-based two-dimensional materials: synthesis and modification aspects for electrochemical sensors

2020 ◽  
Vol 187 (8) ◽  
Author(s):  
Eva-Maria Kirchner ◽  
Thomas Hirsch
Keyword(s):  
Carbon Materials ◽  
Electrochemical Sensors ◽  
Field Effect Transistors ◽  
Chemical Properties ◽  
Chemical Vapor ◽  
Wide Field ◽  
Two Dimensional ◽  
Sensing Applications ◽  
The Impact ◽  
Carbon Based

Abstract This review (162 references) focuses on two-dimensional carbon materials, which include graphene as well as its allotropes varying in size, number of layers, and defects, for their application in electrochemical sensors. Many preparation methods are known to yield two-dimensional carbon materials which are often simply addressed as graphene, but which show huge variations in their physical and chemical properties and therefore on their sensing performance. The first section briefly reviews the most promising as well as the latest achievements in graphene synthesis based on growth and delamination techniques, such as chemical vapor deposition, liquid phase exfoliation via sonication or mechanical forces, as well as oxidative procedures ranging from chemical to electrochemical exfoliation. Two-dimensional carbon materials are highly attractive to be integrated in a wide field of sensing applications. Here, graphene is examined as recognition layer in electrochemical sensors like field-effect transistors, chemiresistors, impedance-based devices as well as voltammetric and amperometric sensors. The sensor performance is evaluated from the material’s perspective of view and revealed the impact of structure and defects of the 2D carbon materials in different transducing technologies. It is concluded that the performance of 2D carbon-based sensors is strongly related to the preparation method in combination with the electrical transduction technique. Future perspectives address challenges to transfer 2D carbon-based sensors from the lab to the market.

Nano-makisu: highly anisotropic two-dimensional carbon allotropes made by weaving together nanotubes

Nanoscale ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 347-355 ◽  
Author(s):  
Lei Zhao ◽  
Wei Liu ◽  
WenCai Yi ◽  
Tao Hu ◽  
Dalar Khodagholian ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Materials ◽  
Single Walled Carbon Nanotubes ◽  
Two Dimensional ◽  
Carbon Allotropes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Two-dimensional Dirac carbon materials with the strongest anisotropy are constructed by spontaneously interlinking single-walled carbon nanotubes along the radial directions.

scholarly journals Carbon Nanostructures for Actuators: An Overview of Recent Developments

Actuators ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 46 ◽  
Author(s):  
Mauro Giorcelli ◽  
Mattia Bartoli
Keyword(s):  
Carbon Nanotubes ◽  
Material Science ◽  
Carbon Nanostructures ◽  
Carbon Materials ◽  
Cutting Edge ◽  
Main Role ◽  
Nanostructured Carbon ◽  
Intrinsic Properties ◽  
Recent Developments ◽  
Carbon Based

In recent decades, micro and nanoscale technologies have become cutting-edge frontiers in material science and device developments. This worldwide trend has induced further improvements in actuator production with enhanced performance. A main role has been played by nanostructured carbon-based materials, i.e., carbon nanotubes and graphene, due to their intrinsic properties and easy functionalization. Moreover, the nanoscale decoration of these materials has led to the design of doped and decorated carbon-based devices effectively used as actuators incorporating metals and metal-based structures. This review provides an overview and discussion of the overall process for producing AC actuators using nanostructured, doped, and decorated carbon materials. It highlights the differences and common aspects that make carbon materials one of the most promising resources in the field of actuators.

Curvature Elastic Energy Model for Carbon Nanotubes

2014 ◽  
Vol 906 ◽  
pp. 185-189
Author(s):  
Wen Wei Yao
Keyword(s):  
Carbon Nanotubes ◽  
Elastic Energy ◽  
Continuous Model ◽  
Energy Model ◽  
Chemical Characteristics ◽  
Two Dimensional ◽  
Elastic Rod ◽  
One Dimensional ◽  
Rod Theory ◽  
Physical And Chemical

Since carbon nanotubes (CNTs) were discovered, due to their unique and novel physical and chemical characteristics, many studies focus on them. In this article, a two-dimensional (2D) curvature elastic energy model for isotropic tube is presented, and reduced to a one-dimensional (1D) continuous model which is in accordance with Kirchhoff elastic rod theory. The problems remaining to be solved are discussed.

scholarly journals Melamine as a single source for fabrication of mesoscopic 3D composites of N-doped carbon nanotubes on graphene

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 12157-12164 ◽  
Author(s):  
Xiao-Ling Yan ◽  
Hua-Fei Li ◽  
Chen Wang ◽  
Bang-Bang Jiang ◽  
Hai-Yan Hu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Two Dimensional ◽  
Single Source ◽  
One Dimensional ◽  
Carbon Structures ◽  
Enhanced Properties

Integration of two-dimensional graphene and one-dimensional carbon nanotubes (CNTs) to create potentially useful 3D mesoscopic carbon structures with enhanced properties relative to the original materials is very desirable.

Distinct interface behaviors of Ni(ii) on graphene oxide and oxidized carbon nanotubes triggered by different topological aggregations

Nanoscale ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 1383-1393 ◽  
Author(s):  
Jianjun Liang ◽  
Ping Li ◽  
Xiaolan Zhao ◽  
Ziyi Liu ◽  
Qiaohui Fan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Environmental Risks ◽  
Two Dimensional ◽  
Graphene Nanosheet ◽  
One Dimensional ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes

Although carbon nanotubes can be described as a seamlessly curled graphene nanosheet, two-dimensional graphene oxide (GO) and one-dimensional oxidized carbon nanotubes (OCNTs), especially with coexisting heavy metals, have different fates and environmental risks, such as deposition, degradation and cytotoxicity.

Sign in / Sign up

Export Citation Format

Share Document