A.M. Umarji
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View article: Polymer-mixed Sb<sub>2</sub>Te<sub>3</sub>/Te nanocomposites exhibiting p-type to n-type conduction reversal and thermal conductivity reduction
Polymer-mixed Sb<sub>2</sub>Te<sub>3</sub>/Te nanocomposites exhibiting p-type to n-type conduction reversal and thermal conductivity reduction Open
Sb 2 Te 3 -based materials are potential room-temperature thermoelectric materials. In the present work, we choose polycrystalline Sb 2 Te 3 /Te nanocomposites and utilize Poly Methyl Methacrylate (PMMA) to reduce the thermal conductivity …
View article: Enhanced phase transition and infrared photoresponse characteristics in VO<sub>2</sub>(M1) thin films synthesized by DC reactive sputtering on different substrates
Enhanced phase transition and infrared photoresponse characteristics in VO<sub>2</sub>(M1) thin films synthesized by DC reactive sputtering on different substrates Open
VO2(M1) films synthesized by sputtering on quartz and c-sapphire substrates exhibited good semiconductor-to-metal transition (SMT) and IR photoresponse properties.
View article: Enhanced humidity responsive ultrasonically nebulised V<sub>2</sub>O<sub>5</sub> thin films
Enhanced humidity responsive ultrasonically nebulised V<sub>2</sub>O<sub>5</sub> thin films Open
A large surface to volume ratio and easily accessible active reaction sites are key attributes for a good gas sensing material. Herein, we report synthesis, characterisation and humidity sensing properties of phase pure 420 nm thick low te…
View article: Measurement of the hysteretic thermal properties of W-doped and undoped nanocrystalline powders of VO2
Measurement of the hysteretic thermal properties of W-doped and undoped nanocrystalline powders of VO2 Open
Hysteresis loops exhibited by the thermal properties of undoped and 0.8 at.% W-doped nanocrystalline powders of VO 2 synthesized by means of the solution combustion method and compacted in pellets, are experimentally measured by phototherm…
View article: Low-cost VO<sub>2</sub>(M1) thin films synthesized by ultrasonic nebulized spray pyrolysis of an aqueous combustion mixture for IR photodetection
Low-cost VO<sub>2</sub>(M1) thin films synthesized by ultrasonic nebulized spray pyrolysis of an aqueous combustion mixture for IR photodetection Open
We report detailed structural, electrical transport and IR photoresponse properties of large area VO2(M1) thin films deposited by a simple cost-effective two-step technique.
View article: High contrast switchability of VO_2 based metamaterial absorbers with ITO ground plane
High contrast switchability of VO_2 based metamaterial absorbers with ITO ground plane Open
A metamaterial consisting of an array of gold micro-disks, separated from a ground plane of indium tin oxide (ITO) by a thin film of vanadium dioxide (VO2), behaves as a perfect absorber at infrared (IR) frequencies at room temperature. Th…
View article: Effect of W addition on the electrical switching of VO2 thin films
Effect of W addition on the electrical switching of VO2 thin films Open
Vanadium Oxide has been a frontrunner in the field of oxide electronics because of its metal-insulator transition (MIT). The interplay of different structures of VO2 has played a crucial role in deciding the magnitude of the first order MI…
View article: Analyzing the kinetic response of tin oxide-carbon and tin oxide-CNT composites gas sensors for alcohols detection
Analyzing the kinetic response of tin oxide-carbon and tin oxide-CNT composites gas sensors for alcohols detection Open
Tin oxide nanoparticles are synthesized using solution combustion technique and tin oxide – carbon composite thick films are fabricated with amorphous carbon as well as carbon nanotubes (CNTs). The x-ray diffraction, Raman spectroscopy and…