Tin oxide (SnO2) nanowires (NWs) and indium oxide (In2O3) nanoparticles (NPs) were synthesized using thermal evaporation and sol–gel methods, respectively. The NWs were decorated with the NPs by ultraviolet light irradiation and furnace annealing. The sensing properties of the NP-decorated NWs were compared with those of SnO2–In2O3 core–shell nanobelts (NBs). Very few nanomaterial sensors show both strong response (response time + recovery time) and short sensing time. In contrast, the In2O3-dec...
The quest for novel synthesis method of silver nanoparticles (AgNPs) is still an active field of research due to their usefulness in different levels of therapeutic and sensing applications. Owing to the better biodegradability and biocompatibility, plant extract-assisted synthesis processes of AgNPs have gained considerable attention in recent years. Here, we report a novel synthesis approach for AgNPs using banana root bulb (BRB) extract. The BRB extract was used as solvent as well as reducing...
The photocatalytic H2 production requires catalysts with specific and optimized crystal morphology, surface area and interfacial bonding. In this work, we used a template based on walnut shell biomass to prevent particle aggregation. Using this approach, we obtained nano-TiO2 with a brookite structure. CdS nanoparticles were then grown in situ on the TiO2 surface. This material was then combined with the inexpensive non-noble-metal cocatalyst (CoP) for consequent H2 production. During the calcin...
Photocatalytic efficacy of copper oxide nanoparticles (CuO Nps) synthesised by a simple wet chemical route at different pH values ranging from 4 to 10 was investigated. The synthesised nanoparticles were characterised by analytical tools such as X-ray diffraction (XRD), diffuse reflectance spectroscopy, photoluminescence, scanning electron microscope and Raman spectroscopy. The XRD pattern endorses the formation of monoclinic CuO with an average particle size of 26 nm at higher pH (pH 8), wherea...
Present work describes the superficial incorporation of the RuO2 in pristine PPy matrix by simply immersing the pristine PPy FE in 20 ml of 1 μM aqueous solution of RuCl3 to soak it in PPy matrix followed by drying. XRD shows mostly amorphous nature but there are peaks confirming the existence of tetragonal as well as rutile structures of RuO2. The characteristic peak at 1563 cm−1 in FTIR confirms the formation of PPy. SEM image of the prepared hybrid flexible electrodes (HFEs) exhibits spherica...
Generating plane waves for sonar systems is of high value due to their directive nature. In this paper, first, the unidirectional carpet cloak theory will be elaborated for converting arbitrary wavefronts to plane waves and collimating transmitted energy. Next, as an specific case study, converting cylindrical waves to plane waves will be demonstrated. Broadband capability of pentamode metasurfaces along with impedance matching has made these structures desirable for experimental underwater appl...
Knowledge on PRET mechanism would be a guide for developing PRET-based sensors. The study on PRET mechanism is in infancy. Herein, the effect of spectral overlap between donor and acceptor on PRET was investigated using the model donor–acceptor pairs, Au/Ag/Au nanosphere (Au/Ag/AuNS)-QD 800 and Au nanosphere (AuNS)-QD 800. The PRET comparison between the two pairs indicated that the particles experiencing PRET and PRET efficiency increased by spectral overlap.
In the present work, nanostructured hydroxyapatite (nano-Hap) was synthesized by following a hydrothermal process using calcium hydroxide and ammonium phosphate. The nano-Hap was unpurified with different amounts of dysprosium oxide (Dy2O3), from 0.5 to 2.0 wt%. Its physicochemical properties were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). TEM confirmed the formation of rod structures (L/D aspect ratio > 1...
Multi-walled carbon nanotubes (MWCNT) were synthesized by the chemical vapor deposition method and functionalized successfully through a two-step procedure, namely sonication and acid reflux. Functionalized multi-wall carbon nanotubes (FMWCNT) were decorated with crystalline nickel-substituted cobalt ferrite nanoparticles (CNF) by the two different routes of hydrothermal method to form CNF@FMWCNT nanocomposite. The nanocomposites with different weight ratios of CNF and FMWCNT were characterized ...
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