Understanding the Relationship between the Growth Conditions and the Diameter of Single Walled Carbon Nanotubes

ABSTRACTIt is frequently observed that as-grown single-walled carbon nanotubes (SWCNTs) contain defects. Controlling the defect density is a key issue for the control of nanotube properties. However, little is known about the influence of the growth conditions on the formation of nanotube defects. In addition, SWCNT samples frequently contain carbonaceous by-products which affect their ensemble properties. Raman spectroscopy is commonly used to characterize both features from the measurement of the defect-induced D band. However, the contribution of each carbonaceous species to the D band is usually not known making it difficult to separately extract the defect density and relative abundance of each. Here, we report on the correlated evolution of the D and G’ bands of SWCNT samples with increasing growth temperature. In the general case, three to four Lorentzian components are required to fit them. Coupled with HRTEM characterization, the low frequency components of the D and G’ can be attributed to the contribution of SWCNTs while high frequency components are associated with defective carbonaceous by-products. The nature of these defective by-products varies with the type of catalysts and with the growth conditions.

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Investigation of the relationship between elastic properties of a single-walled carbon nanotubes and graphene

Herald of the Bauman Moscow State Technical University Series Natural Sciences ◽

10.18698/1812-3368-2016-1-100-110 ◽

2016 ◽

Cited By ~ 1

Author(s):

В.С. Зарубин ◽

◽

Е.С. Сергеева ◽

Keyword(s):

Carbon Nanotubes ◽

Elastic Properties ◽

Single Walled Carbon Nanotubes ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes ◽

The Relationship

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Mapping Single Walled Carbon Nanotubes in Photosynthetic Algae by Single-Cell Confocal Raman Microscopy

Materials ◽

10.3390/ma13225121 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5121

Author(s):

Silvia Orlanducci ◽

Gianluca Fulgenzi ◽

Andrea Margonelli ◽

Giuseppina Rea ◽

Taras K. Antal ◽

...

Keyword(s):

Carbon Nanotubes ◽

Excitation Energy Transfer ◽

Single Walled Carbon Nanotubes ◽

Raman Microscopy ◽

Biological Behavior ◽

Label Free ◽

Single Walled Carbon ◽

Spectroscopic Probes ◽

Walled Carbon Nanotubes ◽

The Relationship

Carbon nanotubes (CNTs) are among the most exploited carbon allotropes in the emerging technologies of molecular sensing and bioengineering. However, the advancement of algal nanobiotechnology and nanobionics is hindered by the lack of methods for the straightforward visualization of the CNTs inside the cell. Herein, we present a handy and label-free experimental strategy based on visible Raman microscopy to assess the internalization of single-walled carbon nanotubes (SWCNTs) using the model photosynthetic alga Chlamydomonas reinhardtii as a recipient. The relationship between the properties of SWCNTs and their biological behavior was demonstrated, along with the occurrence of excitation energy transfer from the excited chlorophyll molecules to the SWCNTs. The non-radiative deactivation of the chlorophyll excitation promoted by the SWCNTs enables the recording of Raman signals originating from cellular compounds located near the nanotubes, such as carotenoids, polyphosphates, and starch. Furthermore, the outcome of this study unveils the possibility to exploit SWCNTs as spectroscopic probes in photosynthetic and non-photosynthetic systems where the fluorescence background hinders the acquisition of Raman scattering signals.

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Influence of the growth conditions on the defect density of single-walled carbon nanotubes

Carbon ◽

10.1016/j.carbon.2012.01.055 ◽

2012 ◽

Vol 50 (7) ◽

pp. 2407-2416 ◽

Cited By ~ 21

Author(s):

Matthieu Picher ◽

Hugo Navas ◽

Raul Arenal ◽

Etienne Quesnel ◽

Eric Anglaret ◽

...

Keyword(s):

Carbon Nanotubes ◽

Defect Density ◽

Single Walled Carbon Nanotubes ◽

Growth Conditions ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

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Effect of Single-Walled Carbon Nanotubes on Strength Properties of Cement Composites

Materials ◽

10.3390/ma13061305 ◽

2020 ◽

Vol 13 (6) ◽

pp. 1305 ◽

Cited By ~ 1

Author(s):

Jiayuan Kang ◽

Salam Al-Sabah ◽

Roger Théo

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Cement Composite ◽

Strength Properties ◽

Cement Composites ◽

Dispersion Method ◽

Single Walled Carbon ◽

Compressive And Flexural Strengths ◽

Walled Carbon Nanotubes ◽

The Relationship

This study aimed to investigate the effects of single-walled carbon nanotubes (SWCNTs) on strength the properties of cement composites when surfactant (SAA) was applied as the dispersion method. TritonX-100 (TX10) was used as the SAA to pretreat SWCNTs, which has been proved to perform well in dispersing the agglomerates of SWCNTs. In this study, four different concentration of SWCNTs, namely 0.00 wt%, 0.02 wt%, 0.04 wt%, and 0.06 wt% by the mass of cement, were used to prepare cement composite specimens. The compressive strength and flexural strength of specimens were tested and recorded. The results show that the compressive and flexural strengths of cement composites decreased with the increase in the concentration of SWCNTs without the addition of TX10. However, when SWCNT suspensions were pretreated with TX10, the strength variation pattern changed; the compressive and flexural strengths of cement composites increased as a function of the concentration of SWCNTs, although there were reductions compared to non-TX10-treated specimens at all concentrations of SWCNTs. Furthermore, the relationship between the strength of cement composites and bulk density of specimens was considered.

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Dynamic Deflection of a Single-Walled Carbon Nanotube Under Ballistic Impact Loading

Journal of Nanotechnology in Engineering and Medicine ◽

10.1115/1.4005676 ◽

2011 ◽

Vol 2 (4) ◽

Cited By ~ 1

Author(s):

Demetris Pentaras ◽

Isaac Elishakoff

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Elastic Beam ◽

Single Walled Carbon Nanotubes ◽

Ballistic Impact ◽

Beam Model ◽

Single Walled Carbon Nanotube ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes ◽

The Relationship

The dynamic deflections of geometrically different single-walled carbon nanotubes are determined under various high-velocity impacts and for different positions at which ballistic impact is applied. Elastic beam model is applied to study the dynamic deflection of single-walled carbon nanotubes for two cases of boundary conditions, namely to clamped–clamped and clamped-free single-walled carbon nanotubes. Moreover, we examine the relationship between the single-walled carbon nanotube radius, the relative position at which the ballistic impact takes place, the speed of the object (e.g., bullet) that strikes the nanotube, and the deflection of the nanotube for a specific bullet size and shape as was used by recent study in the literature.

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