Measuring Single-Walled Carbon Nanotube Length Distributions from Diffusional Trajectories

Streit, Jason K.; Bachilo, Sergei M.; Naumov, Anton V.; Khripin, Constantine Y.; Zheng, Ming; Weisman, R. Bruce

doi:10.1021/nn3032744

Cited by 55 publications

(78 citation statements)

References 40 publications

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“…To ensure that we were not systematically undercounting shorter and dimmer nanotubes, we adapted a technique from Streit et al 32 . Trolox-supplemented agarose gels containing the (GT) 6 -(8,6) sample were imaged under different excitation powers.…”

Section: Resultsmentioning

confidence: 99%

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

et al. 2017

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Electronic and biological applications of carbon nanotubes can be highly dependent on the species (chirality) of nanotube, purity, and concentration. Existing bulk methods, such as absorbance spectroscopy can quantify SP2 carbon based on spectral bands, but nanotube length distribution, defects, and carbonaceous impurities can complicate quantification of individual particles. We present a general method to relate the optical density of a photoluminescent nanotube sample to the number of individual nanotubes. By acquiring 3-dimensional images of nanotubes embedded in a gel matrix with a reducing environment, we quantified the individual nanotubes in a volume, resulting in a measurement of all emissive nanotubes. Via spectral imaging, we assessed structural impurities and precisely determined molar concentrations of the (8,6) and (9,4) nanotube species. We developed an approach to obtain the molarity of any structurally-enriched semiconducting single-walled carbon nanotube preparation on a per-nanotube basis.

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Section: Resultsmentioning

confidence: 99%

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

et al. 2017

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“…The most advanced insitu measurement of the length distribution of dispersed SWNCTs has been reported by the Weisman group who introduced the length analysis by nanotube diffusion method (LAND). 11 The LAND method yields length distributions very similar to the comparative ex-situ AFM method, but unfortunately it requires a dedicated fluorescence microscopy setup that is not available to all researchers in the field. Hence we wanted to develop an in-situ method that is based on standard equipment and easy to implement.…”

mentioning

confidence: 99%

Chiral-index resolved length mapping of carbon nanotubes in solution using electric-field induced differential absorption spectroscopy

Hennrich

Flavel

et al. 2016

Nanotechnology

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The length of single-walled carbon nanotubes (SWCNTs) is an important metric for the integration of SWCNTs into devices and for the performance of SWCNT-based electronic or optoelectronic applications. In this work we propose a rather simple method based on electric-field induced differential absorption spectroscopy (EFIDAS) to measure the chiralindex-resolved average length of SWCNTs in dispersions. The method takes advantage of the electric-field induced length-dependent dipole moment of nanotubes and has been verified and calibrated by atomic force microscopy. This method not only provides a low cost, in-situ approach for length measurements of SWCNTs in dispersion, but due to the sensitivity of the method to the SWCNT chiral index, the chiral index dependent average length of fractions obtained by chromatographic sorting can also be derived. Also, the determination of the chiral-index resolved length distribution seems to be possible using this method.

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“…Excitons migrate along the polymer chain but the overall path length during their lifetime is just a few nanometers (exciton diffusion length, see Section 3.1). [40] It typically follows a log-normal distribution not unlike the polymer molar weight distribution. Nevertheless, phenyl or methyl groups are preferred over, e.g., bromine end-groups, that are remnants of the synthesis, e.g., by Suzuki coupling reaction.…”

Section: Length Distribution and Molar Weightmentioning

confidence: 99%

Semiconducting Single‐Walled Carbon Nanotubes or Very Rigid Conjugated Polymers: A Comparison

Zaumseil

2018

Adv Elect Materials

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With the ability to produce large amounts of purely semiconducting and even monochiral dispersions of single-walled carbon nanotubes (SWCNT) their application as a bulk material in thin film devices on a large scale becomes feasible. Their physical properties, processing, and final devices are quite similar to those of semiconducting polymers. In the extreme case one may view carbon nanotubes as very long, rigid, and fully conjugated polymers. This analogy raises the question whether the knowledge accumulated over the last two decades of processing and studying conjugated polymers could be transferred to solution-processed nanotube devices. Here, the optical and electronic properties of both materials in solution and in thin films are discussed and compared with a focus on their application in optoelectronic devices. Some striking similarities and common issues are highlighted to show the connection between conjugated polymers and SWCNTs as 1D semiconductors.

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Measuring Single-Walled Carbon Nanotube Length Distributions from Diffusional Trajectories

Cited by 55 publications

References 40 publications

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

Chiral-index resolved length mapping of carbon nanotubes in solution using electric-field induced differential absorption spectroscopy

Semiconducting Single‐Walled Carbon Nanotubes or Very Rigid Conjugated Polymers: A Comparison

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