Surface characterization and London dispersive surface free energy of functionalized single‐walled carbon nanotubes with a blend of polytetrafluoroethylene by inverse gas chromatography

2019 ◽  
Vol 51 (5) ◽  
pp. 516-524 ◽  
Author(s):  
Praveen Kumar Basivi ◽  
T.V.M. Sreekanth ◽  
Ramesh Sivalingam ◽  
Chandrakalavathi Thota ◽  
Visweswara Rao Pasupuleti
Keyword(s):  
Carbon Nanotubes ◽  
Gas Chromatography ◽  
Free Energy ◽  
Surface Free Energy ◽  
Surface Characterization ◽  
Inverse Gas Chromatography ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Dispersive Surface Free Energy

On the loading mechanism of ssDNA into carbon nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56896-56903 ◽  
Author(s):  
Jia-Wei Shen ◽  
Ting Tang ◽  
Xiao-Hong Wei ◽  
Wei Zheng ◽  
Tian-Yang Sun ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Binding Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The loading mechanism and dynamics of ssDNA oligomers into single-walled carbon nanotubes was investigated. The binding free energy is in the order A-zigzag SWNT (24,0) > T-zigzag SWNT (24,0) > A-armchair SWNT (14,14) > T-armchair SWNT (14,14).

Inverse Gas Chromatography Study on London Dispersive Surface Free Energy and Electron Acceptor–Donor of Fluconazole Drug

2017 ◽  
Vol 62 (7) ◽  
pp. 2090-2094 ◽  
Author(s):  
Praveen Kumar Basivi ◽  
Visweswara Rao Pasupuleti ◽  
Ramanaiah Seella ◽  
Madhusudana Reddy Tukiakula ◽  
Subramanyam Reddy Kalluru ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Free Energy ◽  
Surface Free Energy ◽  
Electron Acceptor ◽  
Inverse Gas Chromatography ◽  
Dispersive Surface Free Energy

scholarly journals Protein Detection with Potentiometric Aptasensors: A Comparative Study between Polyaniline and Single-Walled Carbon Nanotubes Transducers

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Ali Düzgün ◽  
Hassan Imran ◽  
Kalle Levon ◽  
F. Xavier Rius
Keyword(s):  
Carbon Nanotubes ◽  
Surface Characterization ◽  
Electrochemical Impedance ◽  
Protein Detection ◽  
Single Walled Carbon Nanotubes ◽  
Comparison Study ◽  
Single Walled Carbon ◽  
Multiply Charged ◽  
Walled Carbon Nanotubes

A comparison study on the performance characteristics and surface characterization of two different solid-contact selective potentiometric thrombin aptasensors, one exploiting a network of single-walled carbon nanotubes (SWCNTs) and the other the polyaniline (PANI), both acting as a transducing element, is described in this work. The molecular properties of both SWCNT and PANI surfaces have been modified by covalently linking thrombin binding aptamers as biorecognition elements. The two aptasensors are compared and characterized through potentiometry and electrochemical impedance spectroscopy (EIS) based on the voltammetric response of multiply charged transition metal cations (such as hexaammineruthenium, [Ru(NH3)6]3+) bound electrostatically to the DNA probes. The surface densities of aptamers were accurately determined by the integration of the peak for the reduction of [Ru(NH3)6]3+to [Ru(NH3)6]2+. The differences and the similarities, as well as the transduction mechanism, are also discussed. The sensitivity is calculated as 2.97 mV/decade and 8.03 mV/decade for the PANI and SWCNTs aptasensors, respectively. These results are in accordance with the higher surface density of the aptamers in the SWCNT potentiometric sensor.

Experimental Gibbs Free Energy Considerations in the Nucleation and Growth of Single-Walled Carbon Nanotubes

2005 ◽  
Vol 109 (20) ◽  
pp. 10435-10440 ◽  
Author(s):  
Larry M. Wagg ◽  
G. Louis Hornyak ◽  
Leonid Grigorian ◽  
Anne C. Dillon ◽  
Kim M. Jones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Gibbs Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Nucleation And Growth ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

An Experimental Estimate of the Free Energy of Formation of Single Walled Carbon Nanotubes

2004 ◽  
Vol 858 ◽  
Author(s):  
L. M. Wagg ◽  
G. L. Hornyak ◽  
L. Grigorian ◽  
A. C. Dillon ◽  
K. M. Jones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Feed Composition ◽  
Single Walled Carbon ◽  
Mo Catalyst ◽  
Free Energy Of Formation ◽  
The Difference ◽  
Walled Carbon Nanotubes ◽  
Energy Of Formation

ABSTRACTSingle walled carbon nanotubes (SWNT) were synthesized by methane CVD on a supported mixed transition metal (Fe/Mo) catalyst. Gas feed composition and reaction temperature were varied to identify the threshold conditions for the growth of SWNT. These reaction conditions closely approximate pseudo-equilibrium conditions with some active reaction intermediate (likely chemisorbed carbon atoms) that proceeds to nucleate and grow SWNT. This value also serves as an estimated upper limit of the free energy of formation ΔG*(T)SWNT since the active intermediate proceeds to form SWNT through a process that is thought to be essentially irreversible. The difference relative to graphite is in good agreement with literature values predicted from simulations for SWNT nuclei containing approximately 80 atoms, while considerably larger than that predicted for bulk 5, 5 SWNT. Our estimate over the range 700 to 1000 °C of 16.1 to 13.9 kJ/mol is considerably greater than the free energy of formation for diamond (between 5.8 and 6.9 kJ/mol from 700 to 925 °C).

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
Sign in / Sign up

Export Citation Format

Share Document