Mass Production of High-Purity Semiconducting Carbon Nanotubes by Hydrochloric Acid Assisted Gel Chromatography

2018 ◽  
Vol 2 (1) ◽  
pp. 343-350 ◽  
Author(s):  
Jiaming Cui ◽  
Wei Su ◽  
Dehua Yang ◽  
Shilong Li ◽  
Xiaojun Wei ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrochloric Acid ◽  
High Purity ◽  
Mass Production ◽  
Gel Chromatography

One-step separation of high-purity (6,5) carbon nanotubes by multicolumn gel chromatography

2011 ◽  
Vol 248 (11) ◽  
pp. 2524-2527 ◽  
Author(s):  
Huaping Liu ◽  
Takeshi Tanaka ◽  
Hiromichi Kataura
Keyword(s):  
Carbon Nanotubes ◽  
High Purity ◽  
Gel Chromatography ◽  
One Step

The Relationship Between The Multimeric Structure Of F VIII-VWF And The Facilitation Of Platelet Adhesion To Human Subendothelium (Von Willebrand Factor Activity VWF-A)

1981 ◽  
Author(s):  
Jan J Sixma ◽  
Kjell S Sakariassen ◽  
Piet A Bolhuis
Keyword(s):  
High Purity ◽  
Human Platelets ◽  
Gel Chromatography ◽  
Absolute Requirement ◽  
Mild Reduction ◽  
Agarose Electrophoresis ◽  
Von Willebrand ◽  
The Relationship ◽  
Willebrand Factor ◽  
Ristocetin Cofactor

The relation between the VWF-A of F VIII-VWF and its multimeric structure was studied in an annular perfusion chamber according to Baumgartner, with a steady flow system. 51Cr-labelled aspirin treated human platelets and human post mortem renal arteries were employed. F VIII-VWF was purified from cryoprecipitate by agarose gel chromatography and radiolabelled by the lactoperoxydase method. The multimeric distribution was determined by SDS-agarose electrophoresis. Five different commercial high purity concentrates contained multimers between 0.5 and 3.5 x 106 mol wt. None of these concentrates had VWF-A at ristocetin cofactor activities (RIC0F-A) of 1.0 u/ml. A low potency concentrate with mul- timers in the same mol wt range had normal VWF-A. Mild reduction (dithioerythritol-DTE ≤ 2mM) caused a shift in , mol wt range from 3.0 - 20.0 × 106 towards 0.5 - 2.0 × 106 with little decrease in RIC0F-A and VWF-A. Reduction with 10 mM DTE produced multimers of 1.5 and 0.5 × 106 without RICOF-A and VWF-A, but binding normally to the vessel wall. The void volume peak of 125I-VIII-VWF was rechromatographed on Sepharose-2B and arbitrarily divided in fractions A: mol wt 8,0 - 18.0 × 106 ;B: mol wt 4.5 - 11.0 × 106 ; and C: mol wt 2.5 - 6.5 × 106 . Binding of 125I-VIII-VWF to the subendothelium was highest for A, intermediate for B and lowest for C. Correction for mean mol wt showed that almost equal numbers of molecules bound from all three fractions. When the quantity of bound VIII-VWF was thus expressed, all fractions had a similar relative VWF-A.These data indicate that high purity concentrates do not correct the bleeding time at normal RICOF-levels, because they lack VWF-A. Multimers of high mol wt normally carry both RICOF-A and VWF-A, but the high mol wt is no absolute requirement. These data are in agreement with the notion that VWF-A resides on a specific polypeptide chain in the molecule.

Mass production of multi-wall carbon nanotubes by metal dusting process with high yield

2011 ◽  
Vol 46 (5) ◽  
pp. 716-721 ◽  
Author(s):  
H. Ghorbani ◽  
A.M. Rashidi ◽  
S. Rastegari ◽  
S. Mirdamadi ◽  
M. Alaei
Keyword(s):  
Carbon Nanotubes ◽  
Mass Production ◽  
High Yield ◽  
Metal Dusting ◽  
Multi Wall Carbon Nanotubes

Large-Scale Patterning and Assembly of Carbon Nanotubes by Microfluidic Hydrodynamic Focusing

2011 ◽  
Vol 194-196 ◽  
pp. 503-506 ◽  
Author(s):  
Mei Liu ◽  
Yan Peng ◽  
Qiu Quan Guo ◽  
Jun Luo ◽  
Jun Yang
Keyword(s):  
Carbon Nanotubes ◽  
Mass Production ◽  
Large Scale ◽  
Sample Solution ◽  
Hydrodynamic Focusing ◽  
Bottom Up ◽  
General Pathway ◽  
Efficient Integration

Efficient integration of synthetic nanotubes/nanowires into functional nanodevices by bottom-up approaches is the key of mass production of nanodevices, and is still a big challenge. Here we present a simple microfluidic method of patterning and aligning a large scale of carbon nanotubes by hydrodynamic focusing: the sample solution carrying carbon nanotubes were hydrodynamically controlled by the sheath flows. This method can be used to align and position both a large scale of nanotubes and a few lines of nanotubes to designated positions, offering a general pathway for assembly of nanosystems.

Effect of ozone exposure on the electrical characteristics of high-purity, large-diameter semiconducting carbon nanotubes

2014 ◽  
Vol 16 (22) ◽  
pp. 10861-10865 ◽  
Author(s):  
Jia Gao ◽  
Yueh-Lin Loo
Keyword(s):  
Carbon Nanotubes ◽  
High Purity ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Large Diameter ◽  
Ozone Exposure ◽  
Electrical Characteristics

Presorted, semiconducting carbon nanotubes in the channels of field-effect transistors undergo simultaneous p-doping and oxidation during ozone exposure.

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