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22. The role of substrate on thermal evolution of Ag/TiO[sub]2 nanogranular thin filmsVincenzo Balzano, Emanuele Cavaliere, Mattia Fanetti, Sandra Gardonio, Luca Gavioli, 2021, izvirni znanstveni članek Najdeno v: ključnih besedah
Povzetek najdenega: ...nanogranular composite thin film, substrate driven properties, morphology, optical absorption, Ag/TiO2...
Ključne besede: nanogranular composite thin film, substrate driven properties, morphology, optical absorption, Ag/TiO2
Objavljeno: 03.12.2021; Ogledov: 517; Prenosov: 35
 Polno besedilo (0,00 KB)
Gradivo ima več datotek! Več...
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23. Weathering induced morphological modification on the thermal diffusivity of natural pyrrhotiteMohanachandran Nair Sindhu Swapna, V. Gokul, Vimal Raj, R. Manu Raj, S. N. Kumar, Sankaranarayana Iyer Sankararaman, 2021, izvirni znanstveni članek Opis: Natural pyrrhotites have gained significant attention due to
their interesting electronic, antimicrobial, and chemical
properties. The present work attempts to explore the
morphology-induced modifications in the thermal
characteristics of natural pyrrhotite due to ageing. The
morphological, elemental, structure, optical, and thermal
characterisations help in understanding the effect of
ageing. The effects of five years of ageing of the sample
are (i) Field Emission Scanning Electron Microscopic
analysis reveals a morphological transformation from flakes
to agglomerated powder, (ii) elemental analyses suggest
the ageing induced compositional modification (iii) the
Tauc plot analysis shows a bandgap energy modification
from 1.46 eV to 1.92 eV, (iv) X-ray Diffraction (XRD), Fourier
Transform Infrared, and X-ray photoelectron spectroscopic
studies affirm the formation of oxy-hydroxides (v) the XRD
data indicates an increase of dislocation density, and (vi)
Photoluminescence study shows a deep violet emission
evidenced through the CIE plot. The study by the thermal
lens technique shows a lowering of thermal diffusivity
study by 23%, due to the morphological modifications,
adsorbed/chemisorbed hydroxyl groups, and the formation
of secondary compounds due to oxidation and weathering.
The phonon boundary scattering, weathering induced
smaller grain size, reduced phonon mean free path, and
point defects also account for the lowering of the thermal
diffusivity value and thereby influencing its properties.
Najdeno v: ključnih besedah
Povzetek najdenega: ...chemical
properties. The present work attempts to explore the
morphology-induced modifications in the thermal
characteristics of natural pyrrhotite...
Ključne besede: pyrrhotite, thermal diffusivity, thermal lens, ageing, morphology
Objavljeno: 30.06.2022; Ogledov: 119; Prenosov: 1
 Polno besedilo (1,82 MB)
Gradivo ima več datotek! Več...
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24. Laser-induced thermal lens study of the role of morphology and hydroxyl group in the evolution of thermal diffusivity of copper oxideRiya Sebastian, Mohanachandran Nair Sindhu Swapna, Vimal Raj, Sankaranarayana Iyer Sankararaman, 2022, izvirni znanstveni članek Opis: The paper explores the evolution of thermal behavior of the material by studying the variations in thermal diffusivity
using the single beam thermal lens (TL) technique. For this purpose, the decomposition of Cu(OH)2 into CuO is studied in a
time range up to 120 h, by subjecting the sample to morphological, structural, and spectroscopic characterizations. The time
evolution of thermal diffusivity can be divided into three regions for demonstrating the dynamics of the reaction. When the
reaction is complete, the thermal diffusivity is also found to be saturated. In addition to the morphological modifications,
from rods to flakes, the variations in the amount of hydroxyl group are attributed to be responsible for the enhancement
of base fluid’s thermal diffusivity by 165%. Thus the study unveils the role of hydroxyl groups in the thermal behavior of
CuO.
Najdeno v: ključnih besedah
Ključne besede: thermal diffusivity, CuO, thermal lens, morphology, hydroxyl group
Objavljeno: 04.07.2022; Ogledov: 94; Prenosov: 0
Polno besedilo (2,26 MB) |
25. Tailoring the morphology through alkali treatmentH. V. Saritha Devi, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, 2020, izvirni znanstveni članek Najdeno v: ključnih besedah
Ključne besede: Liquid-phase exfoliation, boron carbide, morphology
tuning, sodium hydroxide, refluxion, bleaching
Objavljeno: 05.07.2022; Ogledov: 101; Prenosov: 0
Polno besedilo (2,02 MB) |
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