Efficient Vapor Sensors Using Foils of Dispersed Nitrogen-Doped and Pure Carbon Multiwalled Nanotubes

2010 ◽  
Vol 10 (6) ◽  
pp. 3965-3972 ◽  
Author(s):  
Bernabe Rebollo-Plata ◽  
Emilio Muñoz-Sandoval ◽  
Florentino López-Urías ◽  
Edson L. Hernández-Cortina ◽  
Humberto Terrones ◽  
...  
Keyword(s):  
Multiwalled Nanotubes ◽  
Nitrogen Doped ◽  
Pure Carbon ◽  
Vapor Sensors ◽  
Carbon Multiwalled Nanotubes

Composites of Polyvinyl Alcohol and Carbon (Coils, Undoped and Nitrogen Doped Multiwalled Carbon Nanotubes) as Ethanol, Methanol and Toluene Vapor Sensors

2011 ◽  
Vol 11 (11) ◽  
pp. 10211-10218 ◽  
Author(s):  
Márcia W. C. C. Greenshields ◽  
Ivo A. Hümmelgen ◽  
Messai A. Mamo ◽  
Ahmed Shaikjee ◽  
Sabelo D. Mhlanga ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polyvinyl Alcohol ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Nitrogen Doped ◽  
Toluene Vapor ◽  
Vapor Sensors

Viability Studies of Pure Carbon- and Nitrogen-Doped Nanotubes withEntamoeba histolytica: From Amoebicidal to Biocompatible Structures

Small ◽  
2007 ◽  
Vol 3 (10) ◽  
pp. 1723-1729 ◽  
Author(s):  
Ana Laura Elías ◽  
Julio César Carrero-Sánchez ◽  
Humberto Terrones ◽  
Morinobu Endo ◽  
Juan Pedro Laclette ◽  
...  
Keyword(s):  
Carbon And Nitrogen ◽  
Nitrogen Doped ◽  
Pure Carbon

scholarly journals Temperature Dependence of Sensors Based on Silver-Decorated Nitrogen-Doped Multiwalled Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Eduardo Gracia-Espino ◽  
Bernabé Rebollo-Plata ◽  
Hugo Martínez-Gutiérrez ◽  
Emilio Muñoz-Sandoval ◽  
Florentino López-Urías ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Density Functional ◽  
Chemical Vapor ◽  
Ag Nps ◽  
Multiwalled Carbon ◽  
Detection Mechanism ◽  
Nitrogen Doped ◽  
Vapor Sensors

Vapor sensors are easily fabricated onto alumina substrates using foils of silver-decorated nitrogen-doped multiwalled carbon nanotubes (CNX-MWNTs-Ag) as active sensing material. The vapor sensors are tested using carbon disulfide, acetone, ethanol, and chloroform vapors. The CNX-MWNTs are produced by chemical vapor deposition process and then decorated with 14 nm Ag nanoparticles (Ag-NPs). The samples are characterized using scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. Our results demonstrate that Ag-decorated CNX-MWNTs exhibit a better response and sensitivity when compared with pristine CNX-MWNTs based sensors, making them promising candidates for air-pollutants environmental monitoring. The temperature effect on the sensor performance is also studied; we found that the detection mechanism could be tuned from physisorption, at room temperature, to chemisorption at higher working temperature. Finally, first-principles density functional calculations are carried out to understand the interactions between the systems involved in the sensors, finding good agreement between experimental results and the theoretical approach.

Raman Characterization of Nitrogen Doped Multiwalled Carbon Nanotubes

2003 ◽  
Vol 772 ◽  
Author(s):  
S. Webster ◽  
J. Maultzsch ◽  
C. Thomsen ◽  
J. Liu ◽  
R. Czerw ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Chemical Vapor ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Multiwalled Carbon ◽  
Multiwalled Nanotubes ◽  
Nitrogen Doped ◽  
Boron Doped ◽  
Donor States

AbstractN-type multi-walled nanotubes were synthesized by nitrogen doping using pyridine and pyridine-melamine mixtures in chemical vapor deposition, and their donor states were verified by Scanning Tunneling Spectroscopy. Tunneling Electron Microscopy reveals small amounts of residual catalyst and Scanning Electron Microscopy show well aligned mats of the Nitrogen doped nanotubes. Nitrogen is present in the lattice of these MWNTs as pyridine structures and CNx structures. Raman scattering measurements were performed as a function of increasing growth temperature and the results compared to previously studied boron doped multiwalled nanotubes.

Boron-Nitrogen Doped Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells

2019 ◽  
Author(s):  
Matthew Morgan ◽  
Maryam Nazari ◽  
Thomas Pickl ◽  
J. Mikko Rautiainen ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Broad Absorption ◽  
Nitrogen Doped ◽  
Large Depth ◽  
End Products ◽  
Boron Nitrogen ◽  
The Way

The electrophilic borylation of 2,5-diarylpyrazines results in the formation of boron-nitrogen doped dihydroindeno[1,2-<i>b</i>]fluorene which can be synthesized via mildly air-sensitive techniques and the end products handled readily under atmosphereic conditions. Through transmetallation via diarylzinc reagents a series of derivatives were sythesized which show broad absorption profiles that highlight the versatility of this backbone to be used in organic solar cell devices. These compounds can be synthesized in large yields, in alow number of steps and functionalized at many stages along the way providing a large depth of possibilities. Exploratory device paramaters were studied and show PCE of 2%.

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