Green silver nanobioarchitectures with amplified antioxidant and antimicrobial properties

2014 ◽  
Vol 2 (21) ◽  
pp. 3221-3231 ◽  
Author(s):  
Marcela Elisabeta Barbinta-Patrascu ◽  
Camelia Ungureanu ◽  
Stefan Marian Iordache ◽  
Ioana Raluca Bunghez ◽  
Nicoleta Badea ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Antimicrobial Properties ◽  
Cost Effective ◽  
Single Walled Carbon Nanotubes ◽  
Bottom Up ◽  
Single Walled Carbon ◽  
Biomimetic Membranes ◽  
Walled Carbon Nanotubes

A novel, simple and cost-effective bottom-up approach was developed to achieve antioxidant and antimicrobial biohybrids based on biomimetic membranes, phyto-nanosilver and single-walled carbon nanotubes.

scholarly journals Negatively-Doped Single-Walled Carbon Nanotubes Decorated with Carbon Dots for Highly Selective NO2 Detection

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2509
Author(s):  
Namsoo Lim ◽  
Jae-Sung Lee ◽  
Young Tae Byun
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Cost Effective ◽  
Single Walled Carbon Nanotubes ◽  
X Ray Diffraction ◽  
Single Walled Carbon ◽  
Sensor Applications ◽  
Transmission Electron ◽  
P Type ◽  
Walled Carbon Nanotubes

In this study, we demonstrated a highly selective chemiresistive-type NO2 gas sensor using facilely prepared carbon dot (CD)-decorated single-walled carbon nanotubes (SWCNTs). The CD-decorated SWCNT suspension was characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-visible spectroscopy, and then spread onto an SiO2/Si substrate by a simple and cost-effective spray-printing method. Interestingly, the resistance of our sensor increased upon exposure to NO2 gas, which was contrary to findings previously reported for SWCNT-based NO2 gas sensors. This is because SWCNTs are strongly doped by the electron-rich CDs to change the polarity from p-type to n-type. In addition, the CDs to SWCNTs ratio in the active suspension was critical in determining the response values of gas sensors; here, the 2:1 device showed the highest value of 42.0% in a sensing test using 4.5 ppm NO2 gas. Furthermore, the sensor selectively responded to NO2 gas (response ~15%), and to other gases very faintly (NO, response ~1%) or not at all (CO, C6H6, and C7H8). We propose a reasonable mechanism of the CD-decorated SWCNT-based sensor for NO2 sensing, and expect that our results can be combined with those of other researches to improve various device performances, as well as for NO2 sensor applications.

scholarly journals Single-Walled Carbon Nanotubes (SWCNTs) as Solid-Contact in All-Solid-State Perchlorate ISEs: Applications to Fireworks and Propellants Analysis

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2697 ◽  
Author(s):  
Saad S. M. Hassan ◽  
Ahmed Galal Eldin ◽  
Abd El-Galil E. Amr ◽  
Mohamed A. Al-Omar ◽  
Ayman H. Kamel
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Impedance ◽  
Cost Effective ◽  
Single Walled Carbon Nanotubes ◽  
Solid Contact ◽  
Single Walled Carbon ◽  
Tetraphenyl Porphyrin ◽  
Eis Measurements ◽  
Walled Carbon Nanotubes ◽  
Potential Stability

Herein, we present reliable, robust, stable, and cost-effective solid-contact ion-selective electrodes (ISEs) for perchlorate determination. Single-walled carbon nanotubes (SWCNTs) were used as solid-contact material and indium (III) 5, 10, 15, 20-(tetraphenyl) porphyrin chloride (InIII-porph) as an ion carrier. The sensor exhibited an improved sensitivity towards ClO4− ions with anionic slope of −56.0 ± 1.1 (R2 = 0.9998) mV/decade over a linear range 1.07 × 10−6 – 1.0 × 10−2 M and detection limit of 1.8 × 10−7 M. The short-term potential stability and the double-layer capacitance were measured by chronopotentiometric and electrochemical impedance spectroscopy (EIS) measurements, respectively. The sensor is used for ClO4− determination in fireworks and propellant powders. The results fairly agree with data obtained by ion chromatography.

Solution-processed flexible transparent conductors based on carbon nanotubes and silver grid hybrid films

Nanoscale ◽  
2014 ◽  
Vol 6 (9) ◽  
pp. 4560-4565 ◽  
Author(s):  
Jing Wang ◽  
Jintao Zhang ◽  
Ashok Kumar Sundramoorthy ◽  
Peng Chen ◽  
Mary B. Chan-Park
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Ag Nanoparticles ◽  
Cost Effective ◽  
Single Walled Carbon Nanotubes ◽  
Transparent Conductors ◽  
Hybrid Films ◽  
Single Walled Carbon ◽  
Pet Film ◽  
Walled Carbon Nanotubes

In a simple, cost-effective, and solution-based process, a thin-film of single-walled carbon nanotubes is hybridized on a PET film which has been patterned with solution self-assembled Ag nanoparticles.

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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