Riya Thomas

Riya Thomas
Koç University · Materials Science and Engineering

Phd

About

16
Publications
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142
Citations
Introduction
Riya Thomas works in the field of thermoelectrics as a Postdoctoral researcher at Koç University.

Publications

Publications (16)
Article
Full-text available
Purpose: This study was conducted to understand the perceptions and awareness of artificial intelligence (AI) in the academic publishing landscape.Methods: We conducted a global survey entitled “Role and impact of AI on the future of academic publishing” to understand the impact of the AI wave in the scholarly publishing domain. This English-langua...
Article
In the study, we deal with the effects of Bi doping on the thermoelectric properties in a series of Cu2Sn1-xBixSe3 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) compounds. The pristine and Bi-doped Cu2SnSe3 samples are synthesized by the solid-state sintering technique. Cubic structure with F4‾3m space group is maintained for all the samples. FESEM analysi...
Article
Full-text available
Cu 2 SnSe 3 has been considered as a potential thermoelectric material owing to its tunable transport properties and its phonon-glass-electron-crystal (PGEC) characteristics. Here, p -type pure and In-doped Cu 2 SnSe 3 samples are synthesized by the solid-state sintering technique. Cubic structure with $$F\overline{4}3m$$ F 4 ¯ 3 m space group is m...
Article
Cu2SnSe3 has been considered as a potential thermoelectric material owing to its cost-effective and nontoxic constituent elements along with its high electrical conductivity. However, its low Seebeck coefficient has been a concern towards realizing a high figure-of-merit. In the present study, Cu2SnSe3/xSnSe (x = 0, 5, 10, and 20 wt %) composite sa...
Article
Single phase CuFeO2, CuFe0.96M0.03V0.01O2 (M = Ti, Mn, and Ga), and CuFe0.96V0.04O2 compounds with space group R3¯m were prepared through a newly developed solid-state technique using annealing under high vacuum. Raman studies demonstrate, for the first time, a minor shift in Ti and Mn-doped samples as well as the Jahn–Teller effect induced distort...
Article
A series of p-type Cu2SnSe3/xCu2Se (x = 0, 5, 10, 15, and 20 wt. %) composites were fabricated by spark plasma sintering, and the thermoelectric properties have been investigated in the temperature range 10–400 K. The crystal structure was evaluated by employing XRD analysis. Rietveld refinement was used to compute the amount of monoclinic and cubi...
Article
Compounds of pristine CuCrO 2 , doped CuCr 0.96 M 0.03 V 0.01 O 2 (M = Ti, Mn, Ga and Nb), CuCr 0.96 V 0.04 O 2 , CuCr 0.97 Mg 0.03 O 2 , CuCr 0.97 Ni 0.03 O 2 and CuCr 1-x Fe x O 2 (x = 0.03, 0.06, and 0.09) were prepared by conventional solid-state route. Rietveld Refinement method using the Fullprof software confirms the single rhombohedral stru...
Article
A systematic investigation on the effect of electron beam irradiation on the structural, electrical properties and thermopower of half doped Nd 0.5 Sr 0.5 MnO 3 manganites is presented in this report. Elemental analysis of the samples through Energy Dispersive X-ray Spectroscopy (EDS) confirm the desired stoichiometry. Rietveld refinement of the X...
Article
In this work, we have adopted melt-spinning technique followed by spark plasma sintering (SPS) to synthesize a p-type nanostructured Si80Ge20 alloy. To illustrate the impact of the technique, the results are compared with that of prepared by ball milling and subsequent SPS. The room temperature XRD of the alloys prepared by both the techniques conf...
Article
The effect of electron beam (e-beam) irradiation on the crystal structure and transport properties of polycrystalline samples of La0.8Sr0.2CoO3 (LSCO) and Pr0.8Sr0.2CoO3 (PSCO) cobaltites is reported in this communication. The of X-ray diffraction data reveals that the pristine and irradiated compounds of LSCO and PSCO samples are single phased hav...
Article
We present temperature-dependent studies on electrical and thermal properties of bulk samples of Pr2/3Sr1/3MnO3-δ synthesized at different sintering temperatures (TS). It is established that these properties intensely influenced by the sintering temperatures. Analysis of electrical resistivity data ρ(T) by means of standard models, demonstrated tha...
Article
A systematic study on the thermal conductivity, Seebeck coefficient and specific heat of La0.7Ca0.2Sr0.1MnO3:PdO composites is presented. Solid state reaction procedure was employed to synthesis the samples. It is seen from thermal conductivity (κ(T)) studies that the samples exhibit a slope change nature close to their corresponding magnetic phase...
Article
In the present communication, we present results on the effect of rare-earth (RE) substitution at La-site on the structural, electrical and thermoelectric properties of La0.7−xRExSr0.3MnO3 compounds. The lattice parameters are observed to decrease with RE-doping which is attributed to the fact that the substituted RE ions (RE = Eu, Gd and Y) are sm...

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