scholarly journals Protein Adsorption on Hybrids of Thermoresponsive Polymers and Single-Walled Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Kazuo Umemura ◽  
Katsuki Izumi ◽  
Yoshikazu Kumashiro ◽  
Shusuke Oura ◽  
Teruo Okano
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Dna Binding Protein ◽  
Biological Applications ◽  
Dna Molecules ◽  
Thermoresponsive Polymers ◽  
Single Walled Carbon ◽  
Fundamental Information ◽  
Significant Difference ◽  
Walled Carbon Nanotubes

Poly(N-isopropylacrylamide) (PNIPAAm) is one of the most popular thermoresponsive polymers. Adsorption of RecA proteins onto hybrids of PNIPAAm and single-walled carbon nanotubes (SWNTs) was observed in the presence and absence of DNA molecules. Although RecA molecules were adsorbed efficiently onto the hybrid surfaces at 37°C, even in the absence of DNA molecules, the adsorption of RecA was inhibited at 4°C. These results suggest that the thermoresponsive functions of PNIPAAm were effective, even on the SWNT surfaces, which supports the possibility of developing nanobiodevices using PNIPAAm-SWNT hybrids. However, although RecA is a DNA binding protein, there was no significant difference in the adsorption of RecA onto PNIPAAm-SWNT surfaces with and without DNA molecules. This study provides fundamental information for potential biological applications of PNIPAAm-SWNT hybrids.

Quantification of the Number of Adsorbed DNA Molecules on Single-Walled Carbon Nanotubes

2020 ◽  
Vol MA2020-01 (7) ◽  
pp. 710-710
Author(s):  
Robert Nißler ◽  
Florian Mann ◽  
Parth Chaturvedi ◽  
Jan Horlebein ◽  
Daniel Meyer ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Dna Molecules ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Study on Dispersant and Surface Analysis of Ophthalmic Lens Materials Containing Carbon Nanotubes

2021 ◽  
Vol 21 (8) ◽  
pp. 4164-4168
Author(s):  
Su-Mi Shin ◽  
A-Young Sung
Keyword(s):  
Carbon Nanotubes ◽  
Contact Lenses ◽  
Breaking Strength ◽  
Crosslinking Agent ◽  
Single Walled Carbon Nanotubes ◽  
Hydroxyethyl Methacrylate ◽  
Single Walled Carbon ◽  
Significant Difference ◽  
Walled Carbon Nanotubes ◽  
Lens Material

In this study, two types of carbon nanotubes were used as ophthalmic material, and hydrogel contact lenses were polymerized by adding two types of dispersants to effectively exert the functions of carbon nanotubes. The physical properties and surfaces of the ophthalmic hydrogel lenses prepared to confirm the functionality as a dispersant were compared and analyzed to find the utility as an ophthalmic lens material. For the polymerization, single-walled carbon nanotubes (SWCNTs), single-walled carbon nanotubes carboxylic acid functionalized (SWCCNTs), 2-hydroxyethyl methacrylate (HEMA), ethylene glycol dimethacrylate (EGDMA, a crosslinking agent), and azobisisobutyronitrile (AIBN, an initiator) was used. In addition, as a dispersant, PVP (polyvinylpyrrolidone) and BYK-111 were copolymerized. As a result of this study, PVP increased the water content and decreased refractive index regardless of the type of carbon, whereas BYK-111 did not show a significant difference in basic properties. Also, PVP gradually decreased breaking strength, while BYK-111 gradually increased breaking strength. BYK-111 effectively exerted the function of carbon nanotubes, and it was confirmed whether it was dispersed through TEM. Therefore, if carbon nanotubes are used as ophthalmic materials by utilizing BYK-111, it considered to be used as functional ophthalmic lens materials.

ZnO/Ag NANOPARTICLE-DECORATED SINGLE-WALLED CARBON NANOTUBES (SWCNTs) AND THEIR PROPERTIES

2019 ◽  
Vol 27 (03) ◽  
pp. 1950123 ◽  
Author(s):  
MOHAMMAD R. MOHAMMAD ◽  
DUHA S. AHMED ◽  
MUSTAFA K. A. MOHAMMED
Keyword(s):  
Carbon Nanotubes ◽  
Colloidal Stability ◽  
Single Walled Carbon Nanotubes ◽  
Chemical Precipitation ◽  
Biological Applications ◽  
Ag Nanoparticle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Raw single-walled carbon nanotubes (SWCNTs) were oxidized by using sulfuric acid and nitric acid at 3:1 ratio to produce oxygen functional groups attached to SWCNTs surfaces. Then, the oxidized SWCNTs are coated with zinc oxide and silver nanoparticles by chemical precipitation route to synthesize ZnO/Ag-SWCNTs nanocomposite material. The nanocomposite sample was analyzed via zeta potential analyzer, ultraviolet-visible (UV-Vis) spectrophotometer, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy to investigate colloidal stability, optical, morphological, and structural properties. The SWCNT properties were found to be changed after the addition of ZnO/Ag nanoparticles. Hence, the new ZnO/Ag-SWCNTs nanocomposite is a good candidate for photocatalyst applications and biological applications.

Quantification of the Number of Adsorbed DNA Molecules on Single-Walled Carbon Nanotubes

2019 ◽  
Vol 123 (8) ◽  
pp. 4837-4847 ◽  
Author(s):  
Robert Nißler ◽  
Florian A. Mann ◽  
Parth Chaturvedi ◽  
Jan Horlebein ◽  
Daniel Meyer ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Dna Molecules ◽  
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
Sign in / Sign up

Export Citation Format

Share Document