Diamond nanothread based resonators: ultrahigh sensitivity and low dissipation

Duan, Ke; Li, Yijun; Li, Li; Duan, Ke; Wang, Xuelin

doi:10.1039/c8nr00502h

Cited by 45 publications

(24 citation statements)

References 53 publications

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“…Thus, a straightforward way to maximize the energy storage capacity of nanothread bundle is to utilize the full tensile potential of each constituent nanothread filaments. It is noted that experimental studies have shown that the carbon nanothreads can be partially saturated 41 , which could increase their elastic limit 42 . This provides the possibility of using partially saturated nanothreads at the outermost layer of the bundle to enhance the mechanical performance of a twisted bundle.…”

Section: Optimum Mechanical Energy Storage In Nanothread Bundlementioning

confidence: 99%

High density mechanical energy storage with carbon nanothread bundle

et al. 2020

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The excellent mechanical properties of carbon nanofibers bring promise for energy-related applications. Through in silico studies and continuum elasticity theory, here we show that the ultra-thin carbon nanothreads-based bundles exhibit a high mechanical energy storage density. Specifically, the gravimetric energy density is found to decrease with the number of filaments, with torsion and tension as the two dominant contributors. Due to the coupled stresses, the nanothread bundle experiences fracture before reaching the elastic limit of any individual deformation mode. Our results show that nanothread bundles have similar mechanical energy storage capacity compared to (10,10) carbon nanotube bundles, but possess their own advantages. For instance, the structure of the nanothread allows us to realize the full mechanical energy storage potential of its bundle structure through pure tension, with a gravimetric energy density of up to 1.76 MJ kg −1 , which makes them appealing alternative building blocks for energy storage devices.

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Section: Optimum Mechanical Energy Storage In Nanothread Bundlementioning

confidence: 99%

High density mechanical energy storage with carbon nanothread bundle

et al. 2020

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“…For example, they may uniquely combine extreme strength with flexibility and resilience, [13][14][15] have higher load transference to polymer matrices than carbon nanotubes due to more irregular surface topography, [16][17] and may support torsional deformations ~3 times those of sp 2 nanotubes for which flattening degrades mechanical performance. 17 Modeling also suggests certain nanothreads may behave as resonators with higher quality factors than carbon nanotubes, 18 could exhibit electronic properties tunable by tensile strain, 19 and may show superplastic behavior. 20 Their thermal conductivity is predicted to be tunable depending on axial structural order.…”

Section: Introductionmentioning

confidence: 99%

Local Structure and Bonding of Carbon Nanothreads Probed by High-Resolution Transmission Electron Microscopy

et al. 2019

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Carbon nanothreads are a new one-dimensional sp 3-bonded nanomaterial of CH stoichiometry synthesized from benzene at high pressure and room temperature by slow solid-state polymerization. The resulting threads assume crystalline packing hundreds of microns across. We show high-resolution electron microscopy (HREM) images of hexagonal arrays of well-aligned thread columns that traverse the 80-100 nm thickness of the prepared sample. Diffuse scattering in electron diffraction reveals that nanothreads are packed with axial and/or azimuthal disregistry between them. Layer lines in diffraction from annealed nanothreads provide the first evidence of translational order along their length, indicating that this solid-state reaction proceeds with some regularity. HREM also reveals bends and defects in nanothread crystals that can contribute to the broadening of their diffraction spots, and electron energy-loss spectroscopy confirms them to be primarily sp 3 hybridized, with less than 27% sp 2 carbon, most likely associated with partially saturated "degree-4" threads.

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“…Figure 11 and Figure 12 show the relationship between the resonance frequencies and the added masses of the DNTs with an isolated SW defect and continuous SW defects. The approximate curve equation for the figures can be expressed as Equation ( 18 ) [ 59 , 60 ], which is applied for the first time in the DNT vibration analysis in this study.

where m denotes the attached mass,

is the natural frequency,

is the resonant frequency with the attached mass, and

is the constant obtained by fitting the analysis results.…”

Section: Resultsmentioning

confidence: 99%

“…Figures 11 and 12 show the relationship between the resonance frequencies and the added masses of the DNTs with an isolated SW defect and continuous SW defects. The approximate curve equation for the figures can be expressed as Equation ( 18) [59,60], which is applied for the first time in the DNT vibration analysis in this study.…”

Section: Vibration Analysismentioning

confidence: 99%

Vibration Control of Diamond Nanothreads by Lattice Defect Introduction for Application in Nanomechanical Sensors

2021

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Carbon nanomaterials, such as carbon nanotubes (CNTs) and graphene sheets (GSs), have been adopted as resonators in vibration-based nanomechanical sensors because of their extremely high stiffness and small size. Diamond nanothreads (DNTs) are a new class of one-dimensional carbon nanomaterials with extraordinary physical and chemical properties. Their structures are similar to that of diamond in that they possess sp3-bonds formed by a covalent interaction between multiple benzene molecules. In this study, we focus on investigating the mechanical properties and vibration behaviors of DNTs with and without lattice defects and examine the influence of density and configuration of lattice defects on the two them in detail, using the molecular dynamics method and a continuum mechanics approach. We find that Young’s modulus and the natural frequency can be controlled by alternating the density of the lattice defects. Furthermore, we investigate and explore the use of DNTs as resonators in nanosensors. It is shown that applying an additional extremely small mass or strain to all types of DNTs significantly changes their resonance frequencies. The results show that, similar to CNTs and GSs, DNTs have potential application as resonators in nano-mass and nano-strain sensors. In particular, the vibration behaviors of DNT resonators can be controlled by alternating the density of the lattice defects to achieve the best sensitivities.

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Diamond nanothread based resonators: ultrahigh sensitivity and low dissipation

Cited by 45 publications

References 53 publications

High density mechanical energy storage with carbon nanothread bundle

High density mechanical energy storage with carbon nanothread bundle

Local Structure and Bonding of Carbon Nanothreads Probed by High-Resolution Transmission Electron Microscopy

Vibration Control of Diamond Nanothreads by Lattice Defect Introduction for Application in Nanomechanical Sensors

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