منابع مشابه
Endohedral Carbon Chains in Single-Wall Carbon Nanotubes
Using a first-principles, local-density-functional approach, we report the bond length optimization of endohedral linear carbon chains. In these calculations, all-carbon nanowire structures were constructed by inserting cumulenic linear carbon chains inside the semiconducting (7,3) and metallic (7,4) single-wall carbon nanotubes with radii of about 0.35 nm. Our calculations show that the total ...
متن کاملElectronic spectroscopy of carbon chains.
Investigators have recorded the electronic spectra of assorted carbon-chain systems in the gas phase using a variety of methods, ranging from direct cavity ringdown absorption spectroscopy to photofragmentation techniques that utilize the cooling capabilities of an ion trap. We summarize the results from these studies and compare them with astronomical measurements of the diffuse interstellar b...
متن کاملChains of Carbon Nanotetrahedra/Nanoribbons
Flattening of a carbon nanotube results in the formation of a carbon nanoribbon with well-defined edges. In addition, a switching of the flattening direction by about a right angle yields a carbon nanotetrahedron at the switching point in a nanoribbon. Here, we report that chains of carbon nanotetrahedra/nanoribbons are formed via sequential switching of the flattening direction of multiwalled ...
متن کاملEngineering molecular chains in carbon nanotubes.
A range of mono- and bis-functionalised fullerenes have been synthesised and inserted into single-walled carbon nanotubes. The effect of the size and shape of the functional groups of the fullerenes on the resultant 1D arrays formed within the nanotubes was investigated by high resolution transmission electron microscopy and X-ray diffraction. The addition of non-planar, sterically bulky chains...
متن کاملSmall Carbon Chains in Circumstellar Envelopes
Observations of carbon-rich circumstellar envelopes were made using the Phoenix spectrograph on the Gemini South telescope to determine the abundance of small carbon chain molecules. Vibration–rotation lines of the ν3 antisymmetric stretch of C3 near 2040 cm−1 (4.902 μm) have been used to determine the column density for four carbon-rich circumstellar envelopes: CRL 865, CRL 1922, CRL 2023 and ...
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ژورنال
عنوان ژورنال: Nature
سال: 1995
ISSN: 0028-0836,1476-4687
DOI: 10.1038/375636a0