Method for separating metallic single-wall carbon nano-tube
A technology of single-wall carbon nanotubes and carbon nanotubes, which is applied in the field of separation of single-wall carbon nanotubes, and can solve problems such as device pollution and unfavorable performance of nanoelectronic devices
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Embodiment 1
[0029] Implementation Example 1 : Purification of carbon tubes
[0030] Since the carbon tube powder used in the experiment itself has certain impurities, it is necessary to carry out purification treatment, for example, adopt the treatment method provided by the prior art, which can make the subsequent separation more effective and reliable. If the used carbon tube powder itself is relatively pure, the purification treatment step may not be used.
[0031] The purification method used in the present embodiment is: first, 1 weight part of carbon nanotubes and 10 weight parts of concentrated hydrochloric acid solution added with 4 weight parts of sodium lauryl sulfate or sodium dodecylsulfonate, ultrasonic 3~ After 4 hours, stand still, remove the upper layer acid solution after the carbon tubes settle, add new acid solution with surfactant and sonicate again, in order to fully remove the catalyst particles in the carbon nanotubes, this step should be repeated until the color ...
Embodiment 2
[0032] Implementation example 2 : Modification and product separation with 6,13-bis(2-(trimethylsilyl)ethynyl)pentacene
[0033] 1 part by weight of the purified single-walled carbon nanotubes obtained in Example 1 was mixed with 0.1 part by weight of 6,13-bis(2-(trimethylsilyl)ethynyl)pentacene in chloroform and ultrasonically mixed for 3.5 hours , centrifuge at 12000 rpm in a high-speed centrifuge to collect the supernatant and precipitate. Precipitation is a product enriched in semiconducting carbon tubes. The supernatant was filtered with a 0.22 micron microporous membrane, and then washed with a large amount of solvent to remove a small amount of unadsorbed or desorbed 6,13-bis(2-(trimethylsilyl)ethynyl)pentacene. The product on the filter membrane is collected to obtain a metal-enriched carbon tube product.
[0034] For the characterization of the isolated product see figure 1 , figure 2 , image 3 and Figure 4 .
Embodiment 3
[0035] Implementation example 3 : Modification and product separation with anthracene
[0036] 1 part by weight of the purified single-walled carbon nanotubes obtained in Example 1 was mixed with 0.1 part by weight of anthracene in chloroform and ultrasonicated for 3.5 hours, then centrifuged in a high-speed centrifuge at a speed of 12000 rpm, and the supernatant and precipitate were collected respectively. Precipitation is a product enriched in semiconducting carbon tubes. Filter the supernatant with a 0.22 micron microporous membrane to remove the solvent, and wash with a large amount of solvent to remove a small amount of unadsorbed or desorbed anthracene. The product on the filter membrane is collected to obtain a metal-enriched carbon tube product.
[0037] For the characterization of the isolated product see image 3 .
[0038] The tube diameter distribution of the samples obtained in Example 2 and Example 3 and the content of metal tubes and semiconductor carbon na...
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Abstract
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