“…In addition, the distances between the yellow boxes are 143, 64, 43, 100, and 71 nm from the left, respectively, which are similar values to the previously reported compartmented distances of the BS-MWCNTs fabricated under the same synthetic conditions (Fig. S2 ) 9 . Figure 4 ( a ) A scanning electron microscopy (SEM) image of a bamboo-shaped multi-walled carbon nanotube (BS-MWCNT) on highly oriented pyrolytic graphite (HOPG).…”
Section: Resultssupporting
confidence: 88%
“…In addition, the distances between the yellow boxes are 143, 64, 43, 100, and 71 nm from the left, respectively, which are similar values to the previously reported compartmented distances of the BS-MWCNTs fabricated under the same synthetic conditions (Fig. S2) 9 .…”
Section: Characterization Of the Curvature Of The Compartmented Strucsupporting
confidence: 88%
“…Their unique structure and properties, such as a relatively large surface area and defect sites, have drawn increasing attention and led to their utilization in many applications, including their use as an absorbent for organic pollutants 13 , 17 , for hydrogen storage 10 , 18 , in lithium-ion battery electrodes 12 , and in sensors 11 . In detail, BS-MWCNTs have many defect sites near the partition part of the compartments because the multi-layered graphene sheets comprising the partition part are open-ended at the surface of the BS-MWCNTs 1 , 8 , 9 , 15 , which inevitably develops to maintain the curvature of the compartmented part. These defect sites appear regularly owing to the periodicity of the compartmented structure in BS-MWCNTs 1 , 2 , 8 – 10 , 15 .…”
Bamboo-shaped multi-walled carbon nanotubes (BS-MWCNTs) have compartmented structures inherently obtained during their catalytic growth, and the curvature of the compartmented structure is known to be determined by the morphology of the metal catalysts. In this study, the inside curvature of the BS-MWCNTs was directly measured through scanning probe microscopy (SPM). The surface of the compartment structures of BS-MWCNTs has discontinuous graphene layers and different frictional force levels depending on the curvature direction. That of the inside curvature can be directly observed through tribological analysis by adding and subtracting the lateral force microscopy images obtained on opposite sides along the axial direction of the BS-MWCNT (diameter of 500 nm). This tells us the direction of the inside curvature of the BS-MWCNT, which was also confirmed by identifying the growth direction of the BS-MWCNTs via scanning electron microscopy. Our demonstration implies that SPM can give the same insight into the structural characterization of nanomaterials that is relatively inexpensive and more user-friendly than currently used methods.
“…In addition, the distances between the yellow boxes are 143, 64, 43, 100, and 71 nm from the left, respectively, which are similar values to the previously reported compartmented distances of the BS-MWCNTs fabricated under the same synthetic conditions (Fig. S2 ) 9 . Figure 4 ( a ) A scanning electron microscopy (SEM) image of a bamboo-shaped multi-walled carbon nanotube (BS-MWCNT) on highly oriented pyrolytic graphite (HOPG).…”
Section: Resultssupporting
confidence: 88%
“…In addition, the distances between the yellow boxes are 143, 64, 43, 100, and 71 nm from the left, respectively, which are similar values to the previously reported compartmented distances of the BS-MWCNTs fabricated under the same synthetic conditions (Fig. S2) 9 .…”
Section: Characterization Of the Curvature Of The Compartmented Strucsupporting
confidence: 88%
“…Their unique structure and properties, such as a relatively large surface area and defect sites, have drawn increasing attention and led to their utilization in many applications, including their use as an absorbent for organic pollutants 13 , 17 , for hydrogen storage 10 , 18 , in lithium-ion battery electrodes 12 , and in sensors 11 . In detail, BS-MWCNTs have many defect sites near the partition part of the compartments because the multi-layered graphene sheets comprising the partition part are open-ended at the surface of the BS-MWCNTs 1 , 8 , 9 , 15 , which inevitably develops to maintain the curvature of the compartmented part. These defect sites appear regularly owing to the periodicity of the compartmented structure in BS-MWCNTs 1 , 2 , 8 – 10 , 15 .…”
Bamboo-shaped multi-walled carbon nanotubes (BS-MWCNTs) have compartmented structures inherently obtained during their catalytic growth, and the curvature of the compartmented structure is known to be determined by the morphology of the metal catalysts. In this study, the inside curvature of the BS-MWCNTs was directly measured through scanning probe microscopy (SPM). The surface of the compartment structures of BS-MWCNTs has discontinuous graphene layers and different frictional force levels depending on the curvature direction. That of the inside curvature can be directly observed through tribological analysis by adding and subtracting the lateral force microscopy images obtained on opposite sides along the axial direction of the BS-MWCNT (diameter of 500 nm). This tells us the direction of the inside curvature of the BS-MWCNT, which was also confirmed by identifying the growth direction of the BS-MWCNTs via scanning electron microscopy. Our demonstration implies that SPM can give the same insight into the structural characterization of nanomaterials that is relatively inexpensive and more user-friendly than currently used methods.
“…novel structural, mechanical, electronic, and chemical properties [33,34]. Depending on their atomic structure, CNTs behave electrically as a metal or as a semiconductor [35,36]. The subtle electronic properties suggest that CNTs have the ability to promote charge-transfer reactions when used as an electrode [37][38][39][40].…”
“…Since its discovery by Iijima in 1991 using transmission electron microscopy, CNTs have been the subject of numerous investigations in chemical, physical, and materials areas due to their novel structural, mechanical, electronic, and chemical properties (Ajayan 1999;Odom et al 1998). Depending on their atomic structure, CNTs behave electrically as a metal or as a semiconductor (Jang et al 2003;Tekleab et al 2000). The subtle electronic properties suggest that CNTs have the ability to promote charge-transfer reactions when used as an electrode (Nugent et al 2001;Gong et al 2005;Wang 2005;Merkoc et al 2005).…”
A simple and highly sensitive method is described for voltammetric determination of leucine in blood and urine samples; namely, a glassy carbon electrode with an effective method is modified with multiwall carbon nanotubes (MWNTs). The cyclic voltammetric results indicated that MWNTs remarkably enhanced electrocatalytic activity toward the oxidation of leucine. Under the optimum condition the calibration curve was linear in the concentration range 9.0 Â 10 À6 À 1.5 Â 10 À3 mol L À1 , with the detection limit of 3.0Â 10 À6 mol L À1 and a relative standard deviation (RSD%) lower than 3.0% (n ¼ 5). Also, some kinetic parameters were determined and a multistep mechanism for oxidation of leucine was proposed.
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