scholarly journals Emergence of Additional Visible-Range Photoluminescence Due to Aggregation of Cyanine Dye: Astraphloxin on Carbon Nanotubes Dispersed with Anionic Surfactant

2016 ◽  
Vol 120 (36) ◽  
pp. 20378-20386 ◽  
Author(s):  
Petro Lutsyk ◽  
Yuri Piryatinski ◽  
Mohammed AlAraimi ◽  
Raz Arif ◽  
Mykola Shandura ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Anionic Surfactant ◽  
Cyanine Dye ◽  
Visible Range

scholarly journals Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

2021 ◽  
Vol 11 (19) ◽  
pp. 9256
Author(s):  
Michał Chodkowski ◽  
Iryna Ya. Sulym ◽  
Konrad Terpiłowski ◽  
Dariusz Sternik
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Multiwalled Carbon Nanotubes ◽  
Composite Coatings ◽  
Thermal Analyses ◽  
Sol Gel ◽  
Visible Range ◽  
Multiwalled Carbon ◽  
Scanning Electron

In this paper, we focus on fabrication and physicochemical properties investigations of silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) composite coatings deposited on the glass supports activated by cold plasma. Air or argon was used as the carrier gas in the plasma process. Multiwalled carbon nanotubes were modified with poly(dimethylsiloxane) in order to impart their hydrophobicity. The silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) nanocomposite was synthesized using the sol–gel technique with acid-assisted tetraethyl orthosilicate hydrolysis. The stability and the zeta potential of the obtained suspension were evaluated. Then, the product was dried and used as a filler in another sol–gel process, which led to the coating application via the dip-coating method. The substrates were exposed to the hexamethyldisilazane vapors in order to improve their hydrophobicity. The obtained surfaces were characterized by the wettability measurements and surface free energy determination as well as optical profilometry, scanning electron microscopy, and transmittance measurements. In addition, the thermal analyses of the carbon nanotubes as well as coatings were made. It was found that rough and hydrophobic coatings were obtained with a high transmittance in the visible range. They are characterized by the water contact angle larger than 90 degrees and the transmission at the level of 95%. The X-ray diffraction studies as well as scanning electron microscopy images confirmed the chemical and structural compositions of the coatings. They are thermally stable at the temperature up to 250 °C. Moreover, the thermal analysis showed that the obtained composite material has greater thermal resistance than the pure nanotubes.

A Novel Chloroplastmimic Photovoltaics With Full Visible Spectrum Operation

2007 ◽  
Author(s):  
Gou-Jen Wang ◽  
Wei-Zheng Chen ◽  
Ming-Way Lee
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Visible Light ◽  
Thylakoid Membrane ◽  
Visible Spectrum ◽  
Visible Range ◽  
Hydrogen Ions ◽  
Ion Diffusion ◽  
Multiple Reflections ◽  
Ultraviolet Range

A novel and very simple chloroplastmimic photovoltaic scheme, in which water is photolyzed by a new photocatalyst fabricated by depositing a thin film of TiO2 on an array of carbon nanotubes (CNT), has been made. Multiple reflections within the photocatalyst extend the optical response from the ultraviolet range to the full visible range. Hydrogen ions with various concentrations are separated by an artificial thylakoid membrane, resulting in a transmembrane chemiosmotic potential, generating ion-diffusion-induced electricity. Experimental results demonstrate that the proposed simple chloroplastmimic photovoltaics can produce a photocurrent directly from visible light.

A facile method to coat mesoporous silica layer on carbon nanotubes by anionic surfactant

2010 ◽  
Vol 64 (12) ◽  
pp. 1383-1386 ◽  
Author(s):  
Min Zhang ◽  
Xihao Zhang ◽  
Xiwen He ◽  
Langxing Chen ◽  
Yukui Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Mesoporous Silica ◽  
Anionic Surfactant ◽  
Silica Layer

scholarly journals A dioxaborine cyanine dye as a photoluminescence probe for sensing carbon nanotubes

2016 ◽  
Vol 7 ◽  
pp. 1991-1999 ◽  
Author(s):  
Mohammed Al Araimi ◽  
Petro Lutsyk ◽  
Anatoly Verbitsky ◽  
Yuri Piryatinski ◽  
Mykola Shandura ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Near Infrared ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Industrial Applications ◽  
Cyanine Dye ◽  
Infrared Range ◽  
Excitation Wavelength ◽  
Potential Threat ◽  
Walled Carbon Nanotubes

The unique properties of carbon nanotubes have made them the material of choice for many current and future industrial applications. As a consequence of the increasing development of nanotechnology, carbon nanotubes show potential threat to health and environment. Therefore, development of efficient method for detection of carbon nanotubes is required. In this work, we have studied the interaction of indopentamethinedioxaborine dye (DOB-719) and single-walled carbon nanotubes (SWNTs) using absorption and photoluminescence (PL) spectroscopy. In the mixture of the dye and the SWNTs we have revealed new optical features in the spectral range of the intrinsic excitation of the dye due to resonance energy transfer from DOB-719 to SWNTs. Specifically, we have observed an emergence of new PL peaks at the excitation wavelength of 735 nm and a redshift of the intrinsic PL peaks of SWNT emission (up to 40 nm) in the near-infrared range. The possible mechanism of the interaction between DOB-719 and SWNTs has been proposed. Thus, it can be concluded that DOB-719 dye has promising applications for designing efficient and tailorable optical probes for the detection of SWNTs.

STUDY OF ELECTRICAL AND OPTICAL PROPERTIES OF Cu-ASSISTED AMORPHOUS CARBON THIN FILMS DEPOSITION BY DC MAGNETRON SPUTTERING

2013 ◽  
Vol 27 (24) ◽  
pp. 1350174 ◽  
Author(s):  
SARA HASSANNIA ◽  
SEYED MOHAMMAD ELAHI ◽  
ARASH BOOCHANI
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Magnetron Sputtering ◽  
Sheet Resistance ◽  
Amorphous Carbon ◽  
Visible Range ◽  
Dc Magnetron Sputtering ◽  
Composite Target ◽  
X Ray ◽  
Carbon Thin Films

Cu incorporated amorphous carbon thin films have been prepared by DC-magnetron sputtering using a bi-component Cu - C composite target. The properties of the films have been investigated by X-ray diffraction, energy dispersive X-ray analysis, atomic force microscopy, FTIR, Raman and UV-vis spectroscopies. The results show that the films are amorphous with major distorted sp2 graphite bonds as well as carbon nanotubes. Sputtering simulation shows that the chemical composition of the films is Cu 0.066 C 0.934. Cu addition results in the formation of new type of carbon nanotubes (CNT) with new radial Breathing mode located at 236 cm-1. Cu induces an increase in the density of defects due to bundles of CNT's. Moreover the films are transparent in visible range and highly reflective in mid-infrared region. Electrical characterization shows that the pure carbon deposited films are semiconductor while the copper assisted thin films behave like metal and their sheet resistance is comparable with sheet resistance of conventional conductive electrodes.

Dispersion of Single-Walled Carbon Nanotubes in Aqueous Solutions of the Anionic Surfactant NaDDBS

2003 ◽  
Vol 107 (48) ◽  
pp. 13357-13367 ◽  
Author(s):  
Olga Matarredona ◽  
Heather Rhoads ◽  
Zhongrui Li ◽  
Jeffrey H. Harwell ◽  
Leandro Balzano ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Anionic Surfactant ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals White nanolight source for optical nanoimaging

2020 ◽  
Vol 6 (23) ◽  
pp. eaba4179
Author(s):  
Takayuki Umakoshi ◽  
Misaki Tanaka ◽  
Yuika Saito ◽  
Prabhat Verma
Keyword(s):  
Carbon Nanotubes ◽  
Resonant Excitation ◽  
Visible Range ◽  
Experimental Demonstration ◽  
Next Generation ◽  
Metallic Nanostructure ◽  
Resonant Phenomenon ◽  
Research Fields ◽  
Multiple Wavelengths

Nanolight sources, which are based on resonant excitation of plasmons near a sharp metallic nanostructure, have attracted tremendous interest in the vast research fields of optical nanoimaging. However, being a resonant phenomenon, this ideally works only for one wavelength that resonates with the plasmons. Multiple wavelengths of light in a broad range confined to one spot within a nanometric volume would be an interesting form of light, useful in numerous applications. Plasmon nanofocusing can generate a nanolight source through the propagation and adiabatic compressions of plasmons on a tapered metallic nanostructure, which is independent of wavelength, as it is based on the propagation, rather than resonance, of plasmons. Here, we report the generation of a white nanolight source spanning over the entire visible range through plasmon nanofocusing and demonstrate spectral bandgap nanoimaging of carbon nanotubes. Our experimental demonstration of the white nanolight source would stimulate diverse research fields toward next-generation nanophotonic technologies.

scholarly journals Sonication-assisted dispersion of carbon nanotubes in aqueous solutions of the anionic surfactant SDBS: The role of sonication energy

2013 ◽  
Vol 58 (17) ◽  
pp. 2082-2090 ◽  
Author(s):  
Kun Yang ◽  
ZiLi Yi ◽  
QingFeng Jing ◽  
RenLiang Yue ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Anionic Surfactant
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