Advances in Natural Sciences: Nanoscience and Nanotechnology

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Iron oxide-based conjugates for cancer theragnostics
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
In this paper we first summarize our recent research on fabrication and structure characterization of conjugates of Fe3O4 nanoparticles (MNPs) encapsulated by several organic materials such as oleic acid (OL), starch (ST), dextran (D), chitosan (CS), O-carboxymethyl chitosan (OCMCS) and the copolymer of poly(styrene-co-acrylic acid (St-co-AA)). The ferrofluids stability and toxicity were also cons... hiện toàn bộ
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A new perovskite-type NdFeO3 adsorbent: synthesis, characterization, and As(V) adsorption
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Nanocrystalline NdFeO3 perovskite oxide was prepared by the combustion method using polyvinyl alcohol (PVA) and corresponding metal nitrate precursors under optimum process conditions, using a solution with a pH of 2, a metal/PVA molar ratio of 1:3, and a calcination temperature of 600 °C, and was characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, B... hiện toàn bộ
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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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Recent advances in experimental basic research on graphene and graphene-based nanostructures
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
The present work is a review of the results achieved in the experimental basic research on following rapidly developing modern topics of nanoscience and nanotechnology related to graphene and graphene-based nanosystems: reduction of graphene oxide and investigation of physical properties of reduced graphene oxide; fabrication and investigation of graphene quantum dots; study of light emission from... 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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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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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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