Parametric variational principle and quadratic programming method for van der Waals force simulation of parallel and cross nanotubes

Zhang, H.W.; Wang, J.B.; Ye, H.F.; Wang, L.

doi:10.1016/j.ijsolstr.2006.08.025

Cited by 15 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, while approaching the tip, a negative response was observed slightly before the contact point. This response could be explained by the attractive Van der Waals forces that are applied at a long distance in the approach step, thus causing a snap of the AFM tip at the surface . It demonstrates the sensitivity of the pressure sensor to the attractive forces with a high sensitivity since the force was evaluated at 150 pN.…”

mentioning

confidence: 93%

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties

Schrodj

Mougin

et al. 2018

Advanced Materials

View full text Add to dashboard Cite

for use in conductors, semiconductors, and insulators. [5] Electronic properties are indeed closely linked to the nature of the metal and conditions of fabrication, which determine the structure of the final material at the atomic scale. These properties can be modified by doping with different metals, by adjusting the metal to oxygen stoichiometry or by generating an amorphous or crystal phase. [6][7][8][9] Today, integration of MOs as thin films, micropatterns or nanopatterns by convenient and simple means remains a major challenge for the fabrication of electronic and optoelectronic devices. MOs are commonly deposited as thin films by sputtering. Though the sputtered MOs usually exhibit better electrical properties due to the accurate control of the composition and defect concentration at the atomic scale, solution-based processes have gained much attention during the last years due to their simplicity, cost effectiveness, vacuum-free processes, and high versatility.In solution-based processes, thermal annealing is required to eliminate the solvent and organic ligands that are complexed on metal ions and to obtain material and phase compositions with suitable properties. This step is typically conducted at temperatures ranging from 300 to 1000 °C. Thus, such a fabrication strategy can be difficult to apply in the case of multistep integration processes involving different materials.In this context, laser processing of MOs presents many advantages due to the control of the laser-matter interaction in space and time. [9] Laser curing allows a fast treatment that can be confined to a limited volume by focusing the laser beam. Such a laserinduced effect leads to a much lower energy consumption with respect to that of thermal annealing. For example, a pulsed laser in the ultraviolet (UV) or near-infrared (NIR) range has been successfully used for the crystal growth of amorphous MO films [10,11] or the hydrothermal growth of MO nanostructures. [12,13] Recently, laser processing has also been introduced for the direct writing of MO microstructures. For this purpose, UV or deep-UV (DUV) wavelengths are usually used. At the molecular scale, the patterning proceeds according to the photodecomposition of the metal precursors complexed by organic molecules. Patterning can be obtained at room temperature down to the nanoscale using direct laser writing (DLW), but usually, a thermal post-treatment is needed to obtain an MO with suitable Metal oxides are an important class of materials for optoelectronic applications. In this context, developing simple and versatile processes for integrating these materials at the microscale and nanoscale has become increasingly important. One of the major remaining challenges is to control the microstructuration and electro-optical properties in a single step. It is shown here that near-infrared femtosecond laser irradiation can be successfully used to prepare amorphous or crystallized TiO 2 microstructures in a single step using a direct laser writing (DLW) approach from a TiO 2 precursor ...

show abstract

mentioning

confidence: 93%

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties

Schrodj

Mougin

et al. 2018

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…The SWCNT network and configuration in the PEEU polymer substrate are schematically illustrated in Figure e. The network and configuration dictate the electron transport properties because van der Waals and electrostatic interactions between CNTs are too weak to transfer electrons efficiently. , …”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, SWCNT and PEEU interaction plays a vital role in the sensing and stretchability properties of the nanocomposite system. Some polymer substrates such as polyvinyl alcohol, ,, thermoplastic polyurethane, polyvinyl carbonate, PDMS, and polyethylene terephthalate were widely used as sensing element substrates which results in different stretchabilities and sensitivities of the sensor. The piezoresistive effect due to mechanical deformation of CNT/polymer composites can be understood in terms of the CNT network configuration, as investigated by many authors. − …”

Section: Resultsmentioning

confidence: 99%

“…The network and configuration dictate the electron transport properties because van der Waals and electrostatic interactions between CNTs are too weak to transfer electrons efficiently. 35,36 Accordingly, SWCNT and PEEU interaction plays a vital role in the sensing and stretchability properties of the nanocomposite system. Some polymer substrates such as polyvinyl alcohol, 8,34,35 thermoplastic polyurethane, 36 polyvinyl carbonate, 37 PDMS, 38 and polyethylene terephthalate 39 were widely used as sensing element substrates which results in different stretchabilities and sensitivities of the sensor.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Stretchable and Sensitive Single-Walled Carbon Nanotube-Based Sensor Decorated on a Polyether Ester Urethane Substrate by a Low Hydrothermal Process

et al. 2021

View full text Add to dashboard Cite

We report a highly stretchable sensor with low-concentration (1.5 wt %) single-walled carbon nanotubes (SWCNTs) on flexible polyether ester urethane (PEEU) yarn, fabricated using a low hydrothermal process at 90 °C. Although SWCNTs restrict the PEEU polymer chain mobility, the resulting ductility of our nanocomposites reduces only by 16.5% on average, initially from 667.3% elongation at break to 557.2%. The resulting electrical resistivity of our nanocomposites can be controlled systematically by the number of hydrothermal cycles. A high gauge factor value of 4.84 is achieved at a tensile strain below 100%, and it increases up to 28.5 with applying a tensile strain above 450%. We find that the piezoresistivity of our nanocomposite is sensitive to temperature variations of 25–85 °C due to the hopping effect, which promotes more charge transport at elevated temperatures. Our nanocomposites offer both a high sensitivity and a large strain sensing range, which is achieved with a relatively simple fabrication technique and low concentration of SWCNTs.

show abstract

“…An advanced definition would be that Van der Waals are short-range forces that act when surfaces are sufficiently close together, and are due to spontaneous electrical and magnetic polarisations that cause a fluctuating electromagnetic field within the medium and in the gap between the surfaces involved (Debrincat et al [2], Zhang et al [16]). …”

Section: Van Der Waals Forces and Conceptsmentioning

confidence: 99%

Micro-Material Handling Employing E-Beam Generated Topographies of Copper and Aluminium

Matope

Nemutudi

et al. 2011

The South African Journal of Industrial Engineering

View full text Add to dashboard Cite

Parametric variational principle and quadratic programming method for van der Waals force simulation of parallel and cross nanotubes

Cited by 15 publications

References 18 publications

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties

Highly Stretchable and Sensitive Single-Walled Carbon Nanotube-Based Sensor Decorated on a Polyether Ester Urethane Substrate by a Low Hydrothermal Process

Micro-Material Handling Employing E-Beam Generated Topographies of Copper and Aluminium

Contact Info

Product

Resources

About

Parametric variational principle and quadratic programming method for van der Waals force simulation of parallel and cross nanotubes

Cited by 15 publications

References 18 publications

Direct Laser Writing of Crystallized TiO2 and TiO2/Carbon Microstructures with Tunable Conductive Properties

Direct Laser Writing of Crystallized TiO2 and TiO2/Carbon Microstructures with Tunable Conductive Properties

Highly Stretchable and Sensitive Single-Walled Carbon Nanotube-Based Sensor Decorated on a Polyether Ester Urethane Substrate by a Low Hydrothermal Process

Micro-Material Handling Employing E-Beam Generated Topographies of Copper and Aluminium

Contact Info

Product

Resources

About

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties

Direct Laser Writing of Crystallized TiO₂ and TiO₂/Carbon Microstructures with Tunable Conductive Properties