Mechanism for the Compressive Strain Induced Oscillations in the Conductance of Carbon Nanotubes

Singh, Lovepreet; Bhattacharyya, Swastibrata; Singh, Abhishek K.

doi:10.1103/physrevlett.110.095504

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…The shift of the D- and G-bands in all the samples after ALD can be explained as the stress build-up on the outer walls due to the contraction of the lattice spacing of carbon atoms with the formation of C–O–Ti bonds at the interface . This trend in the Raman shift due to the strain induced on CNTs or monolayer graphene has been reported in literature. − A shift of the D- and G-bands to higher wavenumbers is an indication of a compressive strain, whereas a shift to lower wavenumbers corresponds to a tensile strain. It seems that after ALD at 60 °C, there is a compressive strain corresponding to the positive shift of the D- and G-bands, and after annealing at 450 °C, there is tensile strain in the structure corresponding to the shift to lower wavenumbers (see Table ).…”

Section: Resultssupporting

confidence: 69%

High Conformity and Large Domain Monocrystalline Anatase on Multiwall Carbon Nanotube Core–Shell Nanostructure: Synthesis, Structure, and Interface

Zhang

Guerra‐Nuñez

et al. 2016

Chem. Mater.

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We report a new facile approach to achieve highly conformal thin layers (∼10 nm) of anatase TiO 2 on nonfunctionalized carbon nanotubes (CNTs) using atomic layer deposition (ALD). The method adopts an initial deposition of amorphous TiO 2 at a low temperature of 60 °C to ensure a good conformity followed by postdeposition annealing at 450 °C under vacuum to induce a complete phase transformation to crystalline anatase TiO 2 while retaining the structural integrity of the CNTs. This approach yields unprecedented sizes of monocrystalline anatase shell domains of up to 500 nm along the CNTs. The high quality of the anatase layer is evidenced directly by high-resolution transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Atomic-scale study of the nanostructure crosssection using electron energy loss spectroscopy provides direct evidence that bonding is formed at the interface after annealing. The low grain boundary anatase shell layer with a well-bonded interface to the CNTs has a high potential of significantly enhanced performance in photocatalysis, solar energy, and nanoelectronics.

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Section: Resultssupporting

confidence: 69%

High Conformity and Large Domain Monocrystalline Anatase on Multiwall Carbon Nanotube Core–Shell Nanostructure: Synthesis, Structure, and Interface

Zhang

Guerra‐Nuñez

et al. 2016

Chem. Mater.

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“…Their mechanical properties—including high strength, high rigidity, and low density—make them highly attractive for various applications by controlling the band structure and thereby modifying the electronic transport properties. Most importantly, this can be achieved reversibly, opening the way to the vast possibility of designing electromechanical sensors, high current field effect transistors, and low resistance interconnects in electronic devices [27].…”

Section: General Considerations Regarding Cntsmentioning

confidence: 99%

Carbon Nanotubes and Carbon Nanotube Structures Used for Temperature Measurement

Monea

Ionete

Spiridon

et al. 2019

Sensors

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Accurate measurement of temperatures with low power consumption with the highest sensitivity and smallest possible elements is still a challenge. The thermal, electrical, and mechanical properties of carbon nanotubes (CNTs) have suggested that their use as a very sensitive sensing element will allow the creation of different sensors, far superior to other devices of similar size. In this paper, we present a short review of different constructive designs of CNTs based resistive sensors used for temperature measurement, available in literature, assembled using different processes, such as self-assembly, drop-casting from a solution, thin films obtained by gluing, printing, spraying, or filtration over a special membrane. As particular cases, temperature sensors obtained from CNT-polymer nanocomposite structures, CNTs filled with uniformly dispersed Fe3O4 nanoparticles or with gallium, and carbon nanotube wires (CNWs) hybrids are presented. Using these preparation procedures, mixtures of CNTs with different dimensions and chirality, as well as with a variable level of impurities and structural defects, can be produced. The sensors’ performance charts are presented, highlighting a number of aspects regarding the applicability of CNT structures for temperature measurement ranging from cryogenic temperatures to high temperatures, the limitations they have, their characteristics and advantages, as well as the special situations that may arise given the particular structure of these new types of materials, together with basic relationships and parameters for CNTs characterization. Further research will be required to develop the techniques of manipulating and depositing individual CNTs on supports and electrodes for the development of temperature sensors.

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“…In general, the modulation of physical properties in electronic materials can be approached by the method of “strain engineering”. So far, strain has been proved to be an effective method for tuning the electronic and optical properties of carbon nanotubes, graphene, , MoS 2 , , and BP, ,− etc. For example, Rudenko et al provide a tight-binding (TB) model parametrization for BP with an arbitrary number of layers to explore the realistic problems related to the electronic properties of multilayer BP.…”

Section: Introductionmentioning

confidence: 99%

Strain Modulation of Electronic Properties of Monolayer Black Phosphorus

2017

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Recent advances in the fabrication of monolayer black phosphorus (MBP) call for a detailed understanding of the physics underlying the electronic structure and related modulation by the method of strain engineering. Here, we present an analytic study to explore the uniaxial strain effect of band structure in MBP based on the first-principles calculations and atomic-bond-relaxation correlation mechanism. It was found that the stress responses of MBP show evident anisotropy due to different edge type structures. The electronic band structure of MBP can be tuned by the applied strain. Moreover, we propose an analytic expression for the variation of the bandgap induced by the uniaxial strain from the perspective of atomistic origin, which suggests an effective bridge between the measurable quantities and the atomic bond identities of MBP. The underlying mechanism on the strain-dependent band offset can be attributed to the variation of crystal potential induced by the changes of bond length, strength, and angle, providing a better understanding of the modulation of electronic properties with strain engineering.

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Mechanism for the Compressive Strain Induced Oscillations in the Conductance of Carbon Nanotubes

Cited by 7 publications

References 32 publications

High Conformity and Large Domain Monocrystalline Anatase on Multiwall Carbon Nanotube Core–Shell Nanostructure: Synthesis, Structure, and Interface

High Conformity and Large Domain Monocrystalline Anatase on Multiwall Carbon Nanotube Core–Shell Nanostructure: Synthesis, Structure, and Interface

Carbon Nanotubes and Carbon Nanotube Structures Used for Temperature Measurement

Strain Modulation of Electronic Properties of Monolayer Black Phosphorus

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