1. Statistical mechanics of DNA-nanotube adsorptionArtem Badasyan, Yevgeni S. Mamasakhlisov, Davit Khechoyan, Sh. A. Tonoyan, 2020, original scientific article Abstract: Attraction between the polycyclic aromatic surface elements of carbon nanotubes (CNTs) and the aromaticnucleotides of deoxyribonucleic acid (DNA) leads to reversible adsorption (physisorption) between the two, aphenomenon related to hybridization. We propose a Hamiltonian formulation for the zipper model that accountsfor the DNA-CNT interactions and allows for the processing of experimental data, which has awaited an availabletheory for a decade.
Found in: ključnih besedah
Summary of found: ...between the polycyclic aromatic surface elements of carbon nanotubes (CNTs) and the aromaticnucleotides of deoxyribonucleic...
Keywords: Carbon nanotubes, desoxyribonucleic acid, physisorption
Published: 30.06.2020; Views: 1867; Downloads: 0
 Fulltext (1,21 MB) |
2. Thermal induced order fluctuations in carbon nanosystem with carbon nanotubesSwapna Mohanachandran Nair Sindhu, Sankararaman S, 2019, original scientific article Abstract: The allotropes of carbon nanomaterials such as carbon nanotubes (CNTs) and nanoparticles (CNPs) have emerged as a thrust area of research during the last decade because of their unique properties.CNTs are widely used in microelectronic, sensor, bio-imaging, supercapacitors, fuel cell, and etc.
applications. In the present work, we report the thermal induced order fluctuations in the CNPs with CNTs synthesized from camphor. The samples annealed to different temperatures are characterized by various spectroscopic techniques such as UV–Visible, Raman, Fourier Transform Infrared, and X-ray Photoelectron Spectroscopy. Samples’ structure and morphology are analyzed by scanning and transmission electron microscopes, and X-ray diffraction. The thermogravimetric analysis indicates
not only the mass variation upon annealing but the thermal stability also. The spectroscopic and thermal analyses reveal the thermal induced oscillations in the carbon system which can be assigned to the dynamics in CNTs through desorption of hydrogen/ thinning or shortening of multi-walled CNTs/sp2 - sp3 conversions and the removal of amorphous carbon (AC). Since the amount of CNTs in the sample decides the electrical behavior, the sample can be tuned to a desired electrical conductivity
by annealing and thus making it a tunable material for electronic applications.
Found in: ključnih besedah
Keywords: Carbon nanotubes, Camphor, Thermal induced oscillations
Published: 05.07.2022; Views: 306; Downloads: 0
Fulltext (2,75 MB) |
3. Order fluctuation induced tunable light emission from carbon nano systemSankararaman S, Swapna Mohanachandran Nair Sindhu, 2019, original scientific article Abstract: The paper reports the thermal-induced order fuctuations, in a carbon nanosystem with carbon nanotubes (CNTs) synthesized
by the incomplete combustion of gingelly oil. The sample annealed at diferent temperatures (30–400 °C) is subjected to
various morphological and spectroscopic characterizations. The ultraviolet–visible spectroscopic and thermogravimetric
analyses reveal the CNTs in the sample. The high-resolution transmission electron microscopy (HR-TEM) also confrms the
formation of CNTs in the sample. The Raman spectrum and X-ray difraction pattern show the signature of multi-walled
to single-walled CNT transformation and thus an order fuctuation on annealing. The quantum yield of the sample, measured by integrating sphere method, yields 46.15% at an emission wavelength of 575 nm. When the excitation wavelength
is varied from 350 to 510 nm, the CIE coordinate moves from the white region to the yellowish-green region. The varying
amount of CNTs in the soot, upon annealing is found to vary the luminescence emission from the sample. The study reveals
the thermal-induced oscillatory order in carbon nanosystem with carbon nanotubes (CNTs) leading to tunable excitation/
thermal-dependent luminescence emission and thereby suggesting the possibility of converting the futile soot for fruitful
applications in photonics and nanoelectronics.
Found in: ključnih besedah
Summary of found: ...fuctuations, in a carbon nanosystem with carbon nanotubes (CNTs) synthesized
by the incomplete combustion of...
Keywords: Carbon nanosystem, Single-walled carbon nanotubes, Multi-walled carbon nanotubes, Raman spectroscopy, Thermogravimetric analysis, CIE plot, Quantum yield, gingelly oil
Published: 05.07.2022; Views: 334; Downloads: 0
Fulltext (1,82 MB) |
4. Particulate Exhaust Analysis from Internal Combustion EnginesSwapna Mohanachandran Nair Sindhu, 2017, short scientific article Abstract: Today the world is worried over the particulate emission from various forms of internal combustion engines. The present work is an attempt to understand the constituents of the particulate emission and its possible use. The particulate exhaust matter containing carbonaceous soot produced from the combustion of
fuel containing hydrocarbons shows the presence of significant amount of carbon Nanomaterials. Hydrocarbons are the most widespread precursors among carbon sources employed in the production of carbon nanotubes (CNTs) and carbon
nanoparticles (CNPs). Carbon nanotubes find application in fuel cells providing improved performance. The soot particles collected from the internal combustion diesel engines are cleaned, powdered and analyzed by various techniques. The
CNPs are characterized by Field Emission Scanning Electron Microscopy (FESEM), X-Ray Powder Diffraction (XRD), Energy Dispersive X ray diffraction (EDS), Raman Spectroscopy, Photoluminescence spectroscopy (PL), Power spectrum and CIE
plot. X Ray Diffraction and Raman spectroscopic analysis show the presence of carbon nanotubes in the amorphous materials.
Found in: ključnih besedah
Summary of found: ...possible use. The particulate exhaust matter containing carbonaceous soot produced from the combustion of
fuel... ...sources employed in the production of carbon nanotubes (CNTs) and carbon
nanoparticles (CNPs). Carbon nanotubes...
Keywords: HydrocarbonsL Carbon nanotubes, Diesel engines, CIE plot, EDX, Raman spectroscopy
Published: 30.06.2022; Views: 397; Downloads: 0
Fulltext (672,31 KB) |
5. Carbon Nanonecklaces with Carbon Nanotubes and Carbon DotsSankararaman S, Swapna Mohanachandran Nair Sindhu, 2017, original scientific article Abstract: Carbon nanoparticles (CNP) have gained significant attention representing
unique carbon-based nanomaterials that find applications in various fields of
science and technology. Carbon nanotubes (CNTs) and carbon dots (CDs)
have now been widely employed as an electrode in super capacitors, as
fluorescent nanomaterials for imaging and for fuel cell applications. In the
present work, we describe a simple, low cost and chemical free method of
synthesizing stable CNPs aligned in the form of a chain popularly known as
carbon necklace with CNTs and CDs. Carbon nanoparticles are synthesized by
controlled combustion of camphor in a single step flame process. The CNPs
synthesized are characterized using X-ray Powder diffraction (XRD), Raman
Spectroscopy, Energy Dispersive X ray diffraction (EDX), Fourier Transform
Infrared Spectroscopy (FTIR), UV-Visible absorption and Photoluminescent
(PL) Spectroscopy. The morphology and size of the CNPs are examined using
Field Emission Scanning Electron Microscope (FESEM) which shows
‘necklace’ structure. The CNPs are collected at two different heights and the
particles formed are found in the range 30 to 60 nm. The UV- Visible and PL
Spectra of the CNPs obtained show the presence CDs. The Raman
Spectroscopic and XRD analysis indicate the presence of CNTs in the sample.
Found in: ključnih besedah
Keywords: Carbon nanoparticles, Combustion, Carbon nanotubes, Carbon
dots, Carbon necklaces
Published: 30.06.2022; Views: 372; Downloads: 0
Fulltext (521,95 KB) |
6. Synthesis and Characterization of MWCNT-COOH/Fe3O4 and CNT-COOH/Fe3O4/NiO Nanocomposites: Assessment of Adsorption and Photocatalytic PerformanceOcsana Opris, Gheorghe Borodi, Dorota Korte, Matteo Amati, Francesca Limosani, Ildiko Lung, Hanna Budasheva, Maria-Loredana Soran, Humberto Cabrera, Adina Stegarescu, Monica Dan, Stefano Bellucci, 2022, original scientific article Found in: ključnih besedah
Summary of found: ... carbon nanotubes,magnetite, tartrazine, photodegradation, adsorption, water decontamin...
Keywords: carbon nanotubes, magnetite, tartrazine, photodegradation, adsorption, water decontamination
Published: 02.09.2022; Views: 380; Downloads: 15
Fulltext (5,78 MB) |
7. Solid Volume Fraction Retained Tailoring of Thermal Diffusivity of Multi-Walled Carbon Nanotube Nanofluid: A Photothermal InvestigationSwapna Mohanachandran Nair Sindhu, 2022, original scientific article Found in: ključnih besedah
Summary of found: ...Carbon nanotubes, MWCNT, Thermal diffusivity, thermal lens, solid volume...
Keywords: Carbon nanotubes, MWCNT, Thermal diffusivity, thermal lens, solid volume fraction
Published: 19.12.2022; Views: 157; Downloads: 0
Fulltext (3,22 MB) |
