The effect of CNT content on the surface and mechanical properties of CNTs doped diamond like carbon films

Wei, Chehung; Wang, Chao-I; Tai, Fong-Cheng; Ting, Kuen; Chang, Rwei Ching

doi:10.1016/j.diamond.2010.01.024

Cited by 17 publications

(4 citation statements)

References 42 publications

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“…Previous computational and experimental studies have investigated amorphous carbon (AC) as a matrix material, particularly in composite thin films. − Jensen et al studied the mechanical properties of various continuous CNT/AC composite models. Jensen et al .…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

Gaikwad

Kowalik

Jensen

et al. 2022

ACS Appl. Nano Mater.

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Flattened carbon nanotubes (flCNTs) naturally form in many carbon nanotube-based materials and can exhibit mechanical properties similar to round carbon nanotubes but with tighter packing and alignment. To facilitate the design, fabrication, and testing of flCNT-based composites for aerospace structures, computational modeling can be used to efficiently and accurately predict their performance as a function of processing parameters, such as reinforcement/matrix cross-linking. In this study, molecular dynamics modeling is used to predict the load transfer characteristics of the interface region between the flat region of flCNTs (i.e., bi-layer graphene) and amorphous carbon (AC) with various levels and locations of covalent bond cross-linking and AC mass density. The results of this study show that increasing the mass density of AC at the interface improves the load transfer capability of the interface. However, a much larger improvement is observed when cross-linking is added both to the flCNT–AC interface and between the flCNT sheets. With both types of cross-linking, substantial improvements in interfacial shear strength, transverse tension strength, and transverse tension toughness are predicted. The results of this study are important for optimizing the processing of flCNT/AC composites for demanding engineering applications.

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Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

Gaikwad

Kowalik

Jensen

et al. 2022

ACS Appl. Nano Mater.

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“…AC has a much higher stiffness and strength than structural polymers [11,12] and also exhibits good structural and chemical compatibility with the CNTs. AC has been previously explored as a matrix material, particularly for composite thin films [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Simulation of mechanical performance limits and failure of carbon nanotube composites

Jensen

Wise

Odegard

2016

Modelling Simul. Mater. Sci. Eng.

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The mechanical properties of carbon nanotube (CNT) fiber composites are steadily approaching those of traditional carbon fiber composites. This work is focused on establishing a plausible upper bound on these properties by modeling the elastic deformations, yield, and fracture of idealized CNT composites using reactive molecular dynamics. Amorphous carbon (AC) was used for the matrix material because of its structural simplicity and physical compatibility with the CNT fillers. Three different arrangements of CNTs in the simulation cell were investigated: a single-wall nanotube (SWNT) array, a multi-wall nanotube (MWNT) array, and a SWNT bundle system. The SWNT and MWNT array systems are clearly idealizations, but the SWNT bundle system is a step closer to real systems in which individual tubes aggregate into large assemblies. Chemical crosslinking was modeled by adding bonds between the CNTs and AC to explore the balance between weakening the CNTs and improving fiber-matrix load transfer. The simulation results reported here clarify the impact of CNT dispersion, the extent of crosslinking, and CNT-templated matrix structuring on the mechanical properties of CNT composites.

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“…Being cylindrical forms of graphene, CNTs are highly conductive and could improve the conductivity of diamond-like material by providing conductive pathways throughout the structure , and potentially overlapping the valence and the conduction bands of DLC. Nevertheless, only a few papers − report attempts to combine multiwalled (MW) CNTs and DLC to create an all-carbon electrode. Also all of those reports mainly concentrate on the effect of CNTs incorporation on the DLC’s mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of Porous Diamond-like Carbon Electrodes for Sensing Hormones, Neurotransmitters, and Endocrine Disruptors

Silva

Zanin

May

et al. 2014

ACS Appl. Mater. Interfaces

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Porous diamond-like carbon (DLC) electrodes have been prepared, and their electrochemical performance was explored. For electrode preparation, a thin DLC film was deposited onto a densely packed forest of highly porous, vertically aligned multiwalled carbon nanotubes (VACNT). DLC deposition caused the tips of the carbon nanotubes to clump together to form a microstructured surface with an enlarged surface area. DLC:VACNT electrodes show fast charge transfer, which is promising for several electrochemical applications, including electroanalysis. DLC:VACNT electrodes were applied to the determination of targeted molecules such as dopamine (DA) and epinephrine (EP), which are neurotransmitters/hormones, and acetaminophen (AC), an endocrine disruptor. Using simple and low-cost techniques, such as cyclic voltammetry, analytical curves in the concentration range from 10 to 100 μmol L(-1) were obtained and excellent analytical parameters achieved, including high analytical sensitivity, good response stability, and low limits of detection of 2.9, 4.5, and 2.3 μmol L(-1) for DA, EP, and AC, respectively.

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The effect of CNT content on the surface and mechanical properties of CNTs doped diamond like carbon films

Cited by 17 publications

References 42 publications

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

Simulation of mechanical performance limits and failure of carbon nanotube composites

Electrochemical Performance of Porous Diamond-like Carbon Electrodes for Sensing Hormones, Neurotransmitters, and Endocrine Disruptors

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