Aligned Nanowire Growth

Cientanni, Vito; Milne, W. I.; Cole, Matthew T.

doi:10.1007/978-3-319-67132-1_1

Cited by 1 publication

(2 citation statements)

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“…For other types of 1D materials, alignment can be complicated. 16 For silver (Ag) nanowires, alignment is often performed through an electric field, 17,18 or partial alignment can be achieved after slow evaporation of water. 19 On the other hand, the alignment of other 1D materials such as GaN, 20 TiO 2 , 21 or SiO 2 22 requires prepatterning of the substrate before growth or growth under special conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Vertical alignment with respect to the substrate can be acquired directly during the growth process of CNTs. − Horizontal alignment during deposition can be achieved as well. − However, in the latter case, the surface density of CNTs on the substrate is rather low, and only a few dedicated substrates can be used. For other types of 1D materials, alignment can be complicated . For silver (Ag) nanowires, alignment is often performed through an electric field, , or partial alignment can be achieved after slow evaporation of water .…”

Section: Introductionmentioning

confidence: 99%

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Langmuir–Scheaffer Technique as a Method for Controlled Alignment of 1D Materials

et al. 2020

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A widely applicable method for aligning 1D materials, and in particular carbon nanotubes (CNTs), independent of their preparation would be very useful as the growth methods for these materials are substance-specific. Langmuir−Schaefer (LS) deposition could be such an approach for alignment, as it aligns a large number of 1D materials independently of the desired substrate. However, the mechanism and required conditions for alignment of 1D nanomaterials in a Langmuir trough are still unclear. Here we show, relying on numerical simulations of the Langmuir film compression, that the LS method is a powerful tool to achieve maximal alignment of 1D material in a controllable manner. In particular, 1D materials terminated with a suitable surfactant can align only if the velocity induced by the attraction between individual 1D entities is low enough relative to the flow speed. To validate this model, we achieved an efficient LS alignment of single-walled carbon nanotubes covered with a suitable surfactant relying on the numerical simulations. In situ polarized Raman microspectroscopy during the compression of Langmuir film revealed good quantitative agreement between the numerical simulations and the experiment. This suggests the applicability of the LS technique as a versatile method for the controlled alignment of 1D materials.

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