Centrifugal Length Separation of Carbon Nanotubes

Langmuir ◽  
2008 ◽  
Vol 24 (24) ◽  
pp. 13880-13889 ◽  
Author(s):  
Jeffrey A. Fagan ◽  
Matthew L. Becker ◽  
Jaehun Chun ◽  
Pingting Nie ◽  
Barry J. Bauer ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Length Separation

scholarly journals Chromatographic Length Separation and Photoluminescence Study on DNA-Wrapped Single-Wall and Double-Wall Carbon Nanotubes

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Yuki Asada ◽  
Toshiki Sugai ◽  
Ryo Kitaura ◽  
Hisanori Shinohara
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Performance ◽  
Water Soluble ◽  
Size Exclusion ◽  
Photoluminescence Study ◽  
Force Microscopy ◽  
Atomic Force ◽  
Length Separation ◽  
Double Wall

Water-soluble DNA-wrapped single-wall and double-wall carbon nanotubes (DNA-SWNTs, DNA-DWNTs) have been well separated by length incorporating size-exclusion high-performance liquid chromatography (HPLC). The morphology and electronic properties of the size- (length-) separated DNA-SWNTs and -DWNTs are investigated by atomic force microscopy (AFM), photoluminescence (PL), and Raman spectroscopy. By using length-separated DNA-SWNTs and -DWNTs, we have found that PL intensity of the DNA-SWNTs varies sensitively depending not only on the chirality (or diameter) but more importantly on the length of the hybrids.

Purification and length separation of single-walled carbon nanotubes using chromatographic method

2005 ◽  
Vol 155 (3) ◽  
pp. 455-460 ◽  
Author(s):  
Yanlian Yang ◽  
Liming Xie ◽  
Zhuo Chen ◽  
Manhong Liu ◽  
Tao Zhu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chromatographic Method ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Length Separation ◽  
Walled Carbon Nanotubes

Length Separation of Zwitterion-Functionalized Single Wall Carbon Nanotubes by GPC

2002 ◽  
Vol 124 (5) ◽  
pp. 728-729 ◽  
Author(s):  
Debjit Chattopadhyay ◽  
Sarah Lastella ◽  
Sejong Kim ◽  
Fotios Papadimitrakopoulos
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Length Separation

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

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