Raman scattering test of single-wall carbon nanotube composites

Hadjiev, V. G.; Iliev, M. N.; Arepalli, Sivaram; Nikolaev, Pavel; Files, Bradley S.

doi:10.1063/1.1373405

Cited by 141 publications

(95 citation statements)

References 13 publications

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“…Reports [4,8] that describe stress induced band shifts in the 9 Raman spectrum of SWCNTs in carbon nanotubes composites help to substantiate this theory.…”

Section: A Nanocompositesmentioning

confidence: 75%

“…Measurements were performed over temperatures in the range of 5 K to 400 K and at magnetic fields up to 1.5 Tesla. 4 Data reproducibility was checked by either repeating measurements on the same sample or conducting the same measurements on different samples from the same batch of SWCNTs. Data consistency was also obtained by comparing the results of temperature dependence measurements with those of magnetic field dependence.…”

Section: Methodsmentioning

confidence: 99%

“…A SWCNT-polymer composite thus may have magnetic field sensing functions if a proper amount of SWCNTs are embedded in the polymer and the intrinsic properties of CNTs, which are sensitive to the applied magnetic field, can be measured. In addition to controllable dispersion, alignment of SWCNTs in a polymer matrix is a primary factor [4] for maximizing the use of CNTs' exceptional mechanical properties in the reinforcement of a structure. Films of strong magnetic field aligned SWCNTs and SWCNT ropes have been produced [5][6] and anisotropic behavior in some of their physical properties have been characterized [7].…”

Section: Introductionmentioning

confidence: 99%

“…Raman spectroscopy has been used in the investigation of the elastic properties of SWCNTs in polymer composites [4,8] and has been proposed as a new approach to determine the residual strains and load transfer in the composites [4] . A direct coupling of SWCNT to the polymer matrix, instead of a van der Waals type mechanism, was suggested as the cause of the frequency shift of certain Raman modes.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic property measurements on single wall carbon nanotube polyimide composites

Sun¹,

Wincheski²,

Park³

2008

Journal of Applied Physics

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[Abstract]Temperature and magnetic field dependent magnetization measurements were performed on polyimide nanocomposite samples, synthesized with various weight percentages of single wall carbon nanotubes. It was found that the magnetization of the composite, normalized to the mass of nanotube material in the sample, decreased with increasing weight percentage of nanotubes. It is possible that the interfacial coupling between the carbon nanotube (CNT) fillers and the polyimide matrix promotes the diamagnetic response from CNTs and reduces the total magnetization of the composite.The coercivity of the samples, believed to originate from the residual magnetic catalyst particles, was enhanced and had a stronger temperature dependence as a result of the composite synthesis. These changes in magnetic properties can form the basis of a new approach to investigate the interfacial properties in the CNT nanocomposites through magnetic property measurements.

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“…Reports [4,8] that describe stress induced band shifts in the 9 Raman spectrum of SWCNTs in carbon nanotubes composites help to substantiate this theory.…”

Section: A Nanocompositesmentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic property measurements on single wall carbon nanotube polyimide composites

Sun¹,

Wincheski²,

Park³

2008

Journal of Applied Physics

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“…18 For CNT composites, it was reported that compressive strain can induce frequency shift of Raman G modes of SWNTs/ epoxy composites subjected to bending. 19 However, these studies relied on the measurements of bulk CNT materials and their composites in which the transfer of mechanical stresses and actual shape of the stressed CNTs remain unknown to great extent. Raman studies of bulk CNT materials demonstrated frequency upshift with increasing compressive strain under hydrostatic pressure.…”

mentioning

confidence: 99%

High-resolution Raman microscopy of curled carbon nanotubes

Pikus

Jiang

et al. 2004

Applied Physics Letters

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Patterned carbon nanotube assemblies with bent nanotube bundles were investigated with combined atomic force microscopy and confocal Raman imaging spectroscopy to identify conditions of carbon nanotubes in the bent state. We showed that the tangential G mode on Raman spectra systematically shifts downward upon nanotube bending as was predicted earlier. This lower frequency shift is attributed to the tensile stress, which results in the loosening of C–C bonds in the outer nanotube walls.

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Carbon Nanotubes and Nanocomposites for Electrical and Thermal Applications

Wang

Veca

et al. 2005

Encyclopedia of Inorganic Chemistry

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The extraordinary electrical and thermal properties of individual carbon nanotubes have prompted predictions on their potentials for ultimately forming polymeric nanocomposites. A significant barrier for the predicted nanocomposites is the severe bundling and insolubility of carbon nanotubes. Chemical modification and functionalization have been demonstrated as being effective in the debundling and solubilization of carbon nanotubes for their homogeneous dispersion into polymer matrices for desired high‐quality nanocomposites. More elegant is the approach to use polymers that are structurally identical or maximally similar to the matrix polymers in the nanotube functionalization to ensure full compatibility of the functionalized nanotubes with the corresponding polymer matrix. Several representative examples are presented, along with discussion on the benefits and issues concerning the polymeric nanocomposites thus obtained. For superior electrical properties, there is experimental evidence suggesting that the nanotube dispersion in the polymer matrix plays an important role. More promising is the use of separated metallic carbon nanotubes for a much enhanced performance in conductive nanocomposites and in related applications, such as transparent conductive films. For highly thermal conductive polymeric nanocomposites, on the other hand, the feasibility of using carbon nanotubes to achieve the desired performance has yet to be convincingly demonstrated experimentally. Nevertheless, the available results do suggest significant effects of the nanotube dispersion and alignment on thermal conductivities of the nanocomposites.

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Raman scattering test of single-wall carbon nanotube composites

Cited by 141 publications

References 13 publications

Magnetic property measurements on single wall carbon nanotube polyimide composites

Magnetic property measurements on single wall carbon nanotube polyimide composites

High-resolution Raman microscopy of curled carbon nanotubes

Carbon Nanotubes and Nanocomposites for Electrical and Thermal Applications

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