Analysis of the Size Distribution of Single-Walled Carbon Nanotubes Using Optical Absorption Spectroscopy

Tian, Ying; Jiang, Hua; Pfaler, Jan von; Zhu, Zhen; Nasibulin, Albert G.; Nikitin, Timur; Aitchison, Brad; Khriachtchev, Leonid; Brown, David P.; Kauppinen, Esko I.

doi:10.1021/jz100161p

Cited by 63 publications

(53 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Complementary to Raman spectroscopy, optical absorption spectrometry has been proven to be a universal tool to evaluate the mean diameters and diameter distributions of SWCNT samples since all types of nanotubes are active in the UV-vis-NIR region [13,14]. Figure 3 shifted to longer wavelengths from 1450 to 2300 nm as the CO 2 concentration was increased from 0.25 to 1.00%.…”

Section: Resultsmentioning

confidence: 99%

“…This significant up-shift of the absorption peaks is indicative of an increase in SWCNT diameter with CO 2 concentration, which is in good agreement with the Raman measurements. Recently, an efficient method for quantifying the diameter distribution of SWCNTs has been developed based on optical absorption spectroscopy [14]. Using this method, the derived diameter histograms of the SWCNT samples are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring the diameter of single-walled carbon nanotubes for optical applications

et al. 2011

Self Cite

View full text Add to dashboard Cite

Single-walled carbon nanotubes (SWCNTs) with specific diameters are required for various applications particularly in electronics and photonics, since the diameter is an essential characteristic determining their electronic and optical properties. In this work, the selective growth of SWCNTs with a certain mean diameter is achieved by the addition of appropriate amounts of CO 2 mixed with the carbon source (CO) into the aerosol (floating catalyst) chemical vapor deposition reactor. The noticeable shift of the peaks in the absorption spectra reveals that the mean diameters of the as-deposited SWCNTs are efficiently altered from 1.2 to 1.9 nm with increasing CO 2 concentration. It is believed that CO 2 acts as an etching agent and can selectively etch small diameter tubes due to their highly curved carbon surfaces. Polymer-free as-deposited SWCNT films with the desired diameters are used as saturable absorbers after stamping onto a highly reflecting Ag-mirror using a simple dry-transfer technique. Sub-picosecond mode-locked fiber laser operations at ~1.56 μm and ~2 μm are demonstrated, showing improvements in the performance after the optimization of the SWCNT properties.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tailoring the diameter of single-walled carbon nanotubes for optical applications

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…The absorption peaks are denoted as M 11 , eh 11 (S 11 ), eh 22 (S 22 ), and eh 33 (S 33 ), and assigned to the first transition of m-SWNTs and the first, second and third excitonic transition of s-SWNTs, respectively [64], [65]. The spectrum for the un-sorted DIPS-SWNTs (Figure 2a) shows broad bands for the M 11 , S 22 , and S 33 peak due to the "nominally" large diameter distribution [93]. Moreover, the lack of sharp features for the excitonic transitions of both m-and s-SWNTs is a signature of bundles [59].…”

Section: Room Temperature Separationmentioning

confidence: 99%

Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography

Yahya

Bonaccorso

Clowes

et al. 2015

Carbon

View full text Add to dashboard Cite

Post-synthesis separation of metallic (m-SWNTs) and semiconducting (s-SWNTs) single-wall carbon nanotubes (SWNTs) remains a challenging process. Gel agarose chromatography is emerging as an efficient and large scale separation technique. However, the full (100%) separation has not been achieved yet, mainly due to the lack of understanding of the underlying mechanism. Here, we study the temperature effect on the SWNTs separation via gel agarose chromatography, for four different SWNT sources. Exploiting a gel agarose micro-beads filtration technique we achieve up to 70% m-SWNTs and over 90% s-SWNTs, independent of the source material. The process is temperature dependent, with yields up to 95% for s-SWNT (HiPco) at 6 °C. Temperature affects the sodium dodecyl sulfate surfactant-micelle distribution along the SWNT sidewalls, thus determining the effectiveness of the SWNTs sorting by electronic type. The sorted SWNTs are then used to fabricate transistors with very low OFF-currents (∼10−13 A), high ON/OFF current ratio (>106) and charge carriers mobility ∼ 40 cm2 V−1 s−1

show abstract

“…UV–vis–NIR absorption spectroscopy is a versatile tool that can be used to define both d tube and, to a limited extent, metallicity [30]. The fitting of semiconducting ( E 11 and E 22 ) and metallic ( M 11 ) optical-transition peaks to the absorption spectra shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of the diameter of single-walled carbon nanotube bundles on the optoelectronic performance of dry-deposited thin films

Mustonen¹,

Susi²,

Kaskela³

et al. 2012

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

SummaryThe optoelectronic performance of thin films of single-walled carbon nanotubes (SWCNTs) was studied with respect to the properties of both individual nanotubes and their bundles. The SWCNTs were synthesized in a hot wire generator aerosol reactor, collected by gas filtration and dry-transferred onto various substrates. By thus completely avoiding liquid dispersion steps, we were able to avoid any artifacts from residual surfactants or sonication. We found that bundle lengths determined the thin-film performance, as would be expected for highly resistive bundle–bundle junctions. However, we found no evidence that contact resistances were affected by the bundle diameters, although they did play a secondary role by simply affecting the absorption. The individual SWCNT diameters and their graphitization level as gauged by the Raman D band intensity did not show any clear correlation with the overall performance.

show abstract

Analysis of the Size Distribution of Single-Walled Carbon Nanotubes Using Optical Absorption Spectroscopy

Cited by 63 publications

References 33 publications

Tailoring the diameter of single-walled carbon nanotubes for optical applications

Tailoring the diameter of single-walled carbon nanotubes for optical applications

Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography

Influence of the diameter of single-walled carbon nanotube bundles on the optoelectronic performance of dry-deposited thin films

Contact Info

Product

Resources

About