The Experts below are selected from a list of 159 Experts worldwide ranked by ideXlab platform
Angela Hight R Walker - One of the best experts on this subject based on the ideXlab platform.
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analyzing surfactant structures on length and chirality resolved 6 5 single wall carbon nanotubes by analytical ultracentrifugation
ACS Nano, 2013Co-Authors: Jeffrey A Fagan, Ming Zheng, Vinayak Rastogi, Jeffrey R Simpson, Constantine Y Khripin, Carlos Silvera A Batista, Angela Hight R WalkerAbstract:The structure and density of the bound interfacial surfactant layer and associated hydration shell were investigated using analytical ultracentrifugation for length and chirality purified (6,5) single-wall carbon nanotubes (SWCNTs) in three different bile salt surfactant solutions. The differences in the chemical structures of the surfactants significantly affect the size and density of the bound surfactant layers. As probed by exchange of a common parent nanotube population into Sodium Deoxycholate, Sodium cholate, or Sodium tauroDeoxycholate solutions, the anhydrous density of the nanotubes was least for the Sodium tauroDeoxycholate surfactant, and the absolute sedimentation velocities greatest for the Sodium cholate and Sodium tauroDeoxycholate surfactants. These results suggest that the thickest interfacial layer is formed by the Deoxycholate, and that the tauroDeoxycholate packs more densely than either Sodium cholate or Deoxycholate. These structural differences correlate well to an observed 25% inc...
Hiromichi Kataura - One of the best experts on this subject based on the ideXlab platform.
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Optical and Conductive Characteristics of Metallic Single-Wall Carbon Nanotubes with Three Basic Colors; Cyan, Magenta, and Yellow
Applied Physics Express, 2008Co-Authors: Kazuhiro Yanagi, Yasumitsu Miyata, Hiromichi KatauraAbstract:We present protocols to prepare high-purity metallic single-wall carbon nanotubes (SWCNTs) with three basic colors, cyan, magenta, and yellow, through density gradient centrifugations. Addition of Deoxycholate Sodium salts as a co-surfactant could improve separation capability for metallic SWCNTs in centrifugations. We applied the improved separation protocols to the SWCNTs with different average diameters (1.34, 1.0, and 0.84 nm), and obtained the metallic SWCNTs with cyan, magenta, and yellow colors. Their optical/conductive characteristics were revealed, and conductive color films were formed from the metallic SWCNTs.
Jeffrey A Fagan - One of the best experts on this subject based on the ideXlab platform.
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analyzing surfactant structures on length and chirality resolved 6 5 single wall carbon nanotubes by analytical ultracentrifugation
ACS Nano, 2013Co-Authors: Jeffrey A Fagan, Ming Zheng, Vinayak Rastogi, Jeffrey R Simpson, Constantine Y Khripin, Carlos Silvera A Batista, Angela Hight R WalkerAbstract:The structure and density of the bound interfacial surfactant layer and associated hydration shell were investigated using analytical ultracentrifugation for length and chirality purified (6,5) single-wall carbon nanotubes (SWCNTs) in three different bile salt surfactant solutions. The differences in the chemical structures of the surfactants significantly affect the size and density of the bound surfactant layers. As probed by exchange of a common parent nanotube population into Sodium Deoxycholate, Sodium cholate, or Sodium tauroDeoxycholate solutions, the anhydrous density of the nanotubes was least for the Sodium tauroDeoxycholate surfactant, and the absolute sedimentation velocities greatest for the Sodium cholate and Sodium tauroDeoxycholate surfactants. These results suggest that the thickest interfacial layer is formed by the Deoxycholate, and that the tauroDeoxycholate packs more densely than either Sodium cholate or Deoxycholate. These structural differences correlate well to an observed 25% inc...
Kazuhiro Yanagi - One of the best experts on this subject based on the ideXlab platform.
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Optical and Conductive Characteristics of Metallic Single-Wall Carbon Nanotubes with Three Basic Colors; Cyan, Magenta, and Yellow
Applied Physics Express, 2008Co-Authors: Kazuhiro Yanagi, Yasumitsu Miyata, Hiromichi KatauraAbstract:We present protocols to prepare high-purity metallic single-wall carbon nanotubes (SWCNTs) with three basic colors, cyan, magenta, and yellow, through density gradient centrifugations. Addition of Deoxycholate Sodium salts as a co-surfactant could improve separation capability for metallic SWCNTs in centrifugations. We applied the improved separation protocols to the SWCNTs with different average diameters (1.34, 1.0, and 0.84 nm), and obtained the metallic SWCNTs with cyan, magenta, and yellow colors. Their optical/conductive characteristics were revealed, and conductive color films were formed from the metallic SWCNTs.
Ming Zheng - One of the best experts on this subject based on the ideXlab platform.
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analyzing surfactant structures on length and chirality resolved 6 5 single wall carbon nanotubes by analytical ultracentrifugation
ACS Nano, 2013Co-Authors: Jeffrey A Fagan, Ming Zheng, Vinayak Rastogi, Jeffrey R Simpson, Constantine Y Khripin, Carlos Silvera A Batista, Angela Hight R WalkerAbstract:The structure and density of the bound interfacial surfactant layer and associated hydration shell were investigated using analytical ultracentrifugation for length and chirality purified (6,5) single-wall carbon nanotubes (SWCNTs) in three different bile salt surfactant solutions. The differences in the chemical structures of the surfactants significantly affect the size and density of the bound surfactant layers. As probed by exchange of a common parent nanotube population into Sodium Deoxycholate, Sodium cholate, or Sodium tauroDeoxycholate solutions, the anhydrous density of the nanotubes was least for the Sodium tauroDeoxycholate surfactant, and the absolute sedimentation velocities greatest for the Sodium cholate and Sodium tauroDeoxycholate surfactants. These results suggest that the thickest interfacial layer is formed by the Deoxycholate, and that the tauroDeoxycholate packs more densely than either Sodium cholate or Deoxycholate. These structural differences correlate well to an observed 25% inc...