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The mechanism of the selective dispersion of single-walled carbon nanotubes (CNTs) by polyfluorene polymers is studied in this paper. Using extensive molecular dynamics simulations, it is demonstrated that diameter selectivity is the result…

Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly…

In the present study, we report a systematic study of doping/ admixing of carbon nanotubes (CNTs) in different concentrations in MgB2. The composite material corresponding to MgB2+ x at.%CNTs (35 at.% > x > 0 at.%) have been prepared by…

超导电性 · 物理学 2007-05-23 Chandra Shekhar , Rajiv Giri , S. K. Malik* , O N Srivastava

In this work, we investigate the electrical conductivity of carbon nanotubes (CNTs), with a particular focus on the effects of doping. Using a first-principles approach, we study the electronic structure, phonon dispersion, and…

材料科学 · 物理学 2024-08-07 Mina Yoon , German D. Samolyuk , Kai Li , James A. Hayne , Tolga Aytug

Macroscopic assemblies of carbon nanotubes (CNTs) are desirable materials because of the excellent CNT properties. Amongst the methods of production of these CNT materials, the dry-draw fabrication where CNT fibers (CNTFs) are directly…

介观与纳米尺度物理 · 物理学 2023-07-12 Luís F. V. Thomazini , Alexandre F. Fonseca

Using carbon nanotubes (CNTs) produced by chemical vapor deposition, we have explored different strategies for the preparation of carbon nanotube devices suited for electrical and mechanical measurements. Though the target device is a…

介观与纳米尺度物理 · 物理学 2009-11-10 B. Babic , J. Furer , M. Iqbal , C. Schonenberger

Carbon nanotubes (CNTs) are stiff, all-carbon macromolecules with diameters as small as one nanometer and few microns long. Solutions of CNTs in chlorosulfonic acid (CSA) follow the phase behavior of rigid rod polymers interacting via a…

Short fiber reinforced polymer composites have found extensive industrial and engineering applications owing to their unique combination of low cost, relatively easy processing and superior mechanical properties compared to their parent…

计算物理 · 物理学 2017-04-06 Atiyeh Alsadat Mousavi , Behrouz Arash , Xiaoying Zhuang , Timon Rabczuk

Transfer printing methods are used to pattern and assemble monolithic carbon nanotube (CNT) thin-film transistors on large-area transparent, flexible substrates. Airbrushed CNT thin-films with sheet resistance 1kOhmsquare^{-1} at 80%…

This study sequentially investigates the enhancement of fracture behavior in adhesive joints. Initially, mechanical sanding techniques were explored, revealing significant improvements of 55% in fracture energy and 38% in load-bearing…

材料科学 · 物理学 2024-06-24 Roohollah Nazari , Rashid Hakimi , Mohammad Daneshfar , Behnam Talebi

Transistors incorporating single-wall carbon nanotubes (CNTs) as the channel material are used in a variety of electronics applications. However, a competitive CNT-based technology requires the precise placement of CNTs at predefined…

Coiled Carbon Nanotubes (CCNTs) are increasingly set to become a vital factor in the new generation of nanodevices and energy-absorbing materials due to their outstanding properties. In the following work, the multi-objective optimization…

材料科学 · 物理学 2021-03-16 Ehsan Shahini , Fazel Rangriz , Ali Karimi Taheri

A nanoscopic simulation for an acceleration sensor is aimed based on the piezoresistive effect of carbon nanotubes (CNTs). Therefore, a compact model is built from density functional theory (DFT), compared with results of molecular dynamics…

介观与纳米尺度物理 · 物理学 2017-07-04 C. Wagner , S. Hartmann , B. Wunderle , J. Schuster , S. E. Schulz , T. Gessner

In building up composite structures using carbon nanotube (CNT) fibers, the fiber-to-matrix interfacial shear strength (IFSS) is one of the most important issues. Originating from the assembly characteristics of CNT fiber, the IFSS strongly…

In this work we study the reinforcement of polymers by mechanically interlocked derivatives of single-walled carbon nanotubes (SWNTs). We compare the mechanical properties of fibers made of polymers and of composites with pristine…

Sorbent materials are a promising alternative to advance hydrogen storage technologies. The general disadvantage is the relatively weak solid-gas interaction and adsorption energy, providing low gravimetric and volumetric capacities and…

材料科学 · 物理学 2022-11-28 Shima Rezaie , David M. J. Smeulders , Azahara Luna-Triguero

We demonstrate that a single zone furnace with a modified synthesis chamber design is sufficient to obtain metal (Fe, Co or Ni) filled carbon nanotubes (CNT) with high filling efficiency and controlled morphology. Samples are formed by…

材料科学 · 物理学 2017-10-09 Aakanksha Kapoor , Nitesh Singh , Arka Bikash Dey , A. K. Nigam , Ashna Bajpai

Carbon nanotube (CNT) is expected for much more important and broader applications in the future, because of its amazing electrical and mechanical properties. However, today, the prospect is detained by the fact that the growth of CNTs…

材料科学 · 物理学 2007-05-23 Shuang Zhang , Takeo Hoshi , Takeo Fujiwara

Vertically-aligned carbon nanotube (CNT) "forest" microstructures fabricated by chemical vapor deposition (CVD) using patterned catalyst films typically have a low CNT density per unit area. As a result, CNT forests have poor bulk…

材料科学 · 物理学 2015-05-19 Michael De Volder , Sei Jin Park , Sameh H. Tawfick , Daniel O. Vidaud , A. John Hart

Short-fiber-reinforced polymer composites are increasingly used in engineering applications and industrial products owing to their unique combination of superior mechanical properties, and relatively easy and low cost manufacturing process.…

应用物理 · 物理学 2017-04-25 Behrouz Arash , Harold S. Park , Timon Rabczuk