A novel electrochemical chiral sensor for 3,4-dihydroxyphenylalanine based on the combination of single-walled carbon nanotubes, sulfuric acid and square wave voltammetry

The Analyst ◽  
2014 ◽  
Vol 139 (9) ◽  
pp. 2243-2248 ◽  
Author(s):  
Lisha Chen ◽  
Fengxia Chang ◽  
Lingchen Meng ◽  
Meixian Li ◽  
Zhiwei Zhu
Keyword(s):  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Chiral Recognition ◽  
Square Wave Voltammetry ◽  
Single Walled Carbon Nanotubes ◽  
Chiral Discrimination ◽  
Square Wave ◽  
Single Walled Carbon ◽  
Wave Voltammetry ◽  
Walled Carbon Nanotubes

The combination of SWV with chiral SWCNTs and H2SO4 shows chiral discrimination for 3,4-dihydroxyphenylalanine, and the three are indispensable for this chiral recognition.

SERS studies on single-walled carbon nanotubes submitted to chemical transformation with sulfuric acid

Carbon ◽  
2002 ◽  
Vol 40 (12) ◽  
pp. 2201-2211 ◽  
Author(s):  
S. Lefrant ◽  
I. Baltog ◽  
M. Baibarac ◽  
J.Y. Mevellec ◽  
O. Chauvet
Keyword(s):  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Chemical Transformation ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Purification and Characterization of Single-Walled Carbon Nanotubes

1999 ◽  
Vol 593 ◽  
Author(s):  
H.Y. Kim ◽  
W.B. Choi ◽  
N.S. Lee ◽  
D.S. Chung ◽  
J.H. Kang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Volume Ratio ◽  
Single Walled Carbon Nanotubes ◽  
Tem Analysis ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes

ABSTRACTSingle-walled carbon nanotubes (SWNTs) were purified and cut into short length by the liquid phase oxidation using the typical oxidants such as HNO3, H2SO4 and their mixture. The SWNTacid solutions were refluxed at high temperature, filtered on poly tetra-fluoro ethylene (PTFE) filter paper. rinsed with distilled water, and then dried at room temperature. In order to find optimum purifying condition, acid solutions were made by mixing nitric / sulfuric acid by the different volume ratio. The reaction time was also varied from 1h to 6h. Through this method, purified SWNTs with the length of less than 2μm were successfully obtained, which was confirmed by scanning electron microscopy (SEM). From transmission electron microscopy (TEM) analysis, it was verified that SWNTs were purified with little damage on surface and metal catalysts were efficiently removed when sulfuric acid was mixed, which was also confirmed by energy disperse spectrum analysis (EDS). Moreover, size distribution of the purified SWNTs was characterized with Field Flow-Fractionation (FFF) method.

scholarly journals Purification and Functionalization of Single-Walled Carbon Nanotubes through Different Treatment Procedures

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Peir-An Tsai ◽  
Hsuan-Yuan Kuo ◽  
Wei-Ming Chiu ◽  
Jyh-Horng Wu
Keyword(s):  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Single Walled Carbon Nanotubes ◽  
Acid Mixture ◽  
Acid Digestion ◽  
Single Walled Carbon ◽  
Microwave Assisted ◽  
Combined Use ◽  
Treatment Procedures ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWCNTs) were purified by the combined use of ultrasonic- and microwave-assisted acid digestion. The results show that the method efficiently eliminates impurities, reduces solvent consumption, and prevents damage to the structure of the SWCNTs. The purified SWCNTs were given functionalization treatments with a nitric acid/sulfuric acid mixture. These acid-treated SWCNTs (A-SWCNTs) were then grafted with 3-isocyanatopropyl triethoxysilane (A-SWCNTs-Si). The A-SWCNTs and A-SWCNTs-Si were used to improve interfacial interactions with polymers and to produce a well-dispersed SWCNT composite.

Interaction of single-walled carbon nanotubes with sulfuric acid

2006 ◽  
Vol 80 (10) ◽  
pp. 1686-1691
Author(s):  
S. I. Kuzina ◽  
A. G. Ryabenko ◽  
D. P. Kiryukhin ◽  
G. A. Kichigina ◽  
A. V. Krestinin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Individualized Single Walled Carbon Nanotubes from Bulk Material Using 96% Sulfuric Acid as Solvent

2006 ◽  
Vol 18 (2) ◽  
pp. 374-377 ◽  
Author(s):  
Jason J. Stephenson ◽  
Jared L. Hudson ◽  
Samina Azad ◽  
James M. Tour
Keyword(s):  
Carbon Nanotubes ◽  
Sulfuric Acid ◽  
Bulk Material ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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