An Individual Carbon Nanotube Transistor Tuned by High Pressure

Caillier, Christophe; Ayari, A.; Gouttenoire, V.; Benoit, Jean‐Michel; Jourdain, Vincent; Picher, Matthieu; Paillet, Matthieu; Floch, Sylvie Le; Purcell, Stephen T.; Sauvajol, Jean‐Louis; San-Miguel, Alfonso

doi:10.1002/adfm.201000398

Cited by 13 publications

(6 citation statements)

References 57 publications

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“…The transition towards this ultimate cross-section defines the geometrical collapse of a CNT [5,6]. Since radially deformed CNTs present different and even possibly enhanced electronic [7] and mechanical properties [8], understanding the radial deformation and the collapse process can offer new opportunities for engineering devices and composites [9].…”

Section: Introductionmentioning

confidence: 99%

Pressure-induced radial collapse in few-wall carbon nanotubes: A combined theoretical and experimental study

Alencar

Cui

Torres-Dias

et al. 2017

Carbon

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We study the pressure induced collapse of single-, double-and triple-wall carbon nanotubes. Theoretical simulations were performed using density-functional tight-binding theory. For tube walls separated by the graphitic distance, we show that the radial collapse pressure, P c , is mainly determined by the diameter of the innermost tube, d in and that its value significantly deviates from the usual P c f d À3 in L evy-Carrier law. A modified expression, P c d À3 in ¼ að1 À b 2 ∕ d 2 in Þ with a and b numerical parameters, which reduces the collapse pressure for low diameters is proposed. For d in a 1.5 nm an enhanced stability is found which may be assigned as due to the bundle intertube geometry-induced interactions. If the inner and outer tubes are separated by larger distances, the collapse process is found to be more complex. High-pressure resonant Raman experiments were performed in double-wall carbon nanotubes having inner and outer diameters averaging 1.5 nm and 2.0 nm, respectively. A modification in the response of the G-band and the disappearance of the radial breathing modes between 2 GPa and 5 GPa indicate the beginning and the end of the radial collapse process. Experimental results are in good agreement with our theoretical predictions, but do not allow to discriminate from those corresponding to a continuum mechanics model.

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Section: Introductionmentioning

confidence: 99%

Pressure-induced radial collapse in few-wall carbon nanotubes: A combined theoretical and experimental study

Alencar

Cui

Torres-Dias

et al. 2017

Carbon

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“…The deformation of CNTs under pressure is well documented, notably for SWCNTs and DWCNTs ( [150] and references therein). The first mechanical transition, corresponding to a modification of the outer wall cross section from circular to oval, could occur above 80 MPa for DWCNTs with an outer diameter of 4 nm [151].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Properties of Carbon Nanotubes

Monthioux

Flahaut

Escoffier

et al. 2014

Handbook of Nanomaterials Properties

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“…Nanotube filling is not expected to affect the axial stiffness and strength, whereas the radial mechanical properties may be significantly improved [7,12,14]. All these considerations are particularly important for applications in nanocomposite materials which may be submitted to different mechanical efforts [15][16][17], or in pressure-or straindriven devices based on carbon nanotubes [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…There have been many studies probing the mechanical, electronic, vibrational or structural properties of single wall carbon nanotubes at high pressure, using X-ray or neutron diffraction [20,21], photoluminescence [7,22], optical absorption spectroscopy [23,24], electronic transport measurements [25] but the studied samples have been mostly composed of mixtures of nanotubes with different chiralities or, in the very few cases in which a unique carbon nanotube has been studied at high pressure, its chirality was not identified [18]. There is thus a lack of studies of single chirality samples at high pressure, studies that would allow correlating the pressure evolution of properties with a given chirality or diameter, as well as the effect of molecular filling on these properties.…”

Section: Introductionmentioning

confidence: 99%

Superior carbon nanotube stability by molecular filling:a single-chirality study at extreme pressures

Bousige

Stolz

Silva-Santos

et al. 2021

Carbon

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Carbon nanotubes have extraordinary mechanical properties, but modifications of their structure tend to weaken them. Here, we have studied by experiments and modelling the one-dimensional filling of single chirality (6,5) carbon nanotubes with iodine and water. We show that iodine-filling can enhance the pressure of radial collapse of these nanotubes by a factor 2 compared to the empty (6,5) tubes. For water filling, this enhancement factor reduces to 1.4. Our single-chirality study allows correlating the different Raman signatures of the radial collapsing process, which was not possible in samples with mixed chiralities. A clear spectroscopic signature of the collapse pressure can thus be given: it is the pressure at which the G-band frequency evolution with pressure softens while the radial breathing mode intensity vanishes. These new criteria for the detection of radial collapse allow correcting some existing discrepancies in the literature. Finally, we discuss the impact of molecular filling on the radial mechanical stability as a function of the tube diameter. It results that molecular filling allows for a superior stability effect than filling with tubes (i.e. multi-wall carbon nanotubes). The stability enhancement tends to grow with the tube diameter and depends strongly on the nature of the filling molecules.

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An Individual Carbon Nanotube Transistor Tuned by High Pressure

Cited by 13 publications

References 57 publications

Pressure-induced radial collapse in few-wall carbon nanotubes: A combined theoretical and experimental study

Pressure-induced radial collapse in few-wall carbon nanotubes: A combined theoretical and experimental study

Properties of Carbon Nanotubes

Superior carbon nanotube stability by molecular filling:a single-chirality study at extreme pressures

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