Advances in Natural Sciences: Nanoscience and Nanotechnology

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Characterization of the thin layer photocatalysts TiO2 and V2O5- and Fe2O3- doped TiO2 prepared by the sol–gel method
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
The catalysts TiO2 and TiO2 doped with Fe and V were prepared using the sol–gel method. TiO2-modified samples were obtained in the form of a thick film on pyrex glass sticks and tubes and were used as catalysts in the gas phase photo-oxidation of p-xylene. The physico-chemical characteristics of the catalysts were determined using the methods of Brunauer–Emmett–Teller adsorption, x-ray diffraction... hiện toàn bộ
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The prospect of using guava leaf extract for biosynthesizing chitosan nanoparticles
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Chitosan is polysaccharide polymer used for biomedical applications and food packaging. The aim of this investigation is to produce chitosan nanoparticles (ChNPs) using guava leaf (Psidium guajava L.) extract as green synthesis of nanoparticles using plant leaf extract is ecofriendly and cost-effective approach. The leaves of guava are nontoxic, full of bioactive compounds, and suitable alternativ... hiện toàn bộ
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Electrospinning of doxorubicin loaded silica/poly(ɛ-caprolactone) hybrid fiber mats for sustained drug release
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Loading of anticancer drugs into electrospun fiber matrices is a portentous approach for clinical treatment of diseased tissues or organs. In this study, doxorubicin hydrochloride (DOX) is added to silica nanoparticles (SiO2) during the formation of SiO2 via the sol-gel approach. The obtained DOX@SiO2  nanoparticles are then added to poly(ɛ-caprolactone) (PCL) and poly(ethylene oxide) (PEO) blend ... hiện toàn bộ
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Preparation of the vulcan XC-72R-supported Pt nanoparticles for the hydrogen evolution reaction in PEM water electrolysers
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Pt nanoparticles on vulcan XC-72R support (Pt/vulcan XC-72R) were prepared by the impregnation–reduction method. The Pt content, the morphological properties and the electrochemical catalysis of the Pt/vulcan XC 72R materials have been investigated by ICP-OES analysis, FESEM, TEM, and cyclic voltammetry. These materials were then used as catalyst for hydrogen evolution reaction at the cathode of p... hiện toàn bộ
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A facile bio-synthesis of copper nanoparticles using Cuminum cyminum seed extract: antimicrobial studies
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
In this study we report the facile synthesis of environmentally benignant copper nanoparticles (CuNPs) using Cuminum cyminum (Cumin) seed extract. Bio-molecules present in the seed extracts can be used to reduce the metal ions to nanoparticles in a single-step green synthesis process. The synthesized CuNPs have been characterized by studying the structural, morphological, optical and antimicrobial... hiện toàn bộ
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Potential in-vitro anti-breast cancer activity of green-synthesized silver nanoparticles preparation against human MCF-7 cell-lines
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
An efficient bio-catalyzed synthesis of silver nanoparticles from aqueous silver nitrate solution was carried out utilizing the fresh Buchanania axillaris leaves' aqueous-n-butanolic extract. The high-density yield silver nanoparticles were characterized by UV-Vis (Ultraviolet-visible), Fourier-transform infra-red (FT-IR), X-ray diffraction (XRD), energy dispersive-absorption X-rays (EDX), size an... hiện toàn bộ
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Performance analysis of SOI MOSFET with rectangular recessed channel
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
In this paper a two dimensional (2D) rectangular recessed channel–silicon on insulator metal oxide semiconductor field effect transistor (RRC-SOI MOSFET), using the concept of groove between source and drain regions, which is one of the channel engineering technique to suppress the short channel effect (SCE). This suppression is mainly due to corner potential barrier of the groove and the simulati... hiện toàn bộ
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Solution processing of microcavity for BioMEMS application
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Compared to the conventional silicon-based technology, the solution process appears to be a revolution in the field of micro/nanofabrication due to its advantages of high efficiency in material and energy consumption and the use of low cost material. In this paper, we introduce a new approach to fabricate BioMEMS devices using this novel technology to make microcavity. Zirconium oxide patterns wer... hiện toàn bộ
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Time-resolved photoluminescence study of CuInS2/ZnS nanocrystals
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2010
The emission mechanism in ZnS-capped 3-nm CuInS2 nanocrystals was studied by using time-resolved photoluminescence (TRPL). A typical TRPL spectrum demonstrates two broad emission bands. The spectral shifts as functions of the excitation power density and delay times from the excitation moment prove that both emission bands originate from donor-acceptor pair recombinations. Moreover, the temperatur... hiện toàn bộ
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Effect of calcination temperature on physicochemical and antimicrobial properties of green synthesised ZnO/C/Ca nanocomposites using Calotropis gigantea leaves
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2021
In the present study, green synthesised ZnO nanoparticles using Calotropis gigantea (C. gigantea) leaf extract which were produced at different calcination temperatures (i.e. 400 °C and 500 °C) were evaluated against skin ulcer pathogens since no study is reviewed before. The results from x-ray powder diffraction and energy-dispersive spectroscopy confirmed the presence of ZnO nanoparticles along ... hiện toàn bộ
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