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U(VI) reduction by Fe(II) on hematite nanoparticles
Springer Science and Business Media LLC - Tập 13 - Trang 3741-3754 - 2011
Nanoscale size effects on U(VI) reduction by Fe(II) on hematite were investigated with four aerosol-synthesized hematite nanoparticles (12, 30, 50, 125 nm) and one aqueous-synthesized hematite (70 nm). Batch experiments were conducted at loadings of 0.01 mM U(VI) and 5 mM Fe(II) at pH 7.5 and 9.0. Rate constants for reduction of U(VI) to U(IV) were determined using a pseudo-first order reaction ra...... hiện toàn bộ
Antitumour, antimicrobial and catalytic activity of gold nanoparticles synthesized by different pH propolis extracts
Springer Science and Business Media LLC - Tập 17 - Trang 1-13 - 2015
The Romanian propolis was extracted in five different media, respectively, in water (pH 6.8), glycine buffer (pH 2.5), acetate buffer (pH 5), phosphate buffer (pH 7.4) and carbonate buffer (pH 9.2). The extracts presented different amounts of flavonoids and phenolic acids, increasing pH leading to higher concentrations of active compounds. Five variants of gold nanoparticles suspensions based on d...... hiện toàn bộ
A comparison of atomic force microscopy (AFM) and dynamic light scattering (DLS) methods to characterize nanoparticle size distributions
Springer Science and Business Media LLC - Tập 10 - Trang 89-96 - 2008
This paper compares the accuracy of conventional dynamic light scattering (DLS) and atomic force microscopy (AFM) for characterizing size distributions of polystyrene nanoparticles in the size range of 20–100 nm. Average DLS values for monosize dispersed particles are slightly higher than the nominal values whereas AFM values were slightly lower than nominal values. Bimodal distributions were easi...... hiện toàn bộ
Chemical composition dispersion in bi-metallic nanoparticles: semi-automated analysis using HAADF-STEM
Springer Science and Business Media LLC - - 2012
We present a method using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) to determine the chemical composition of bi-metallic nanoparticles. This method, which can be applied in a semi-automated way, allows large scale analysis with a statistical number of particles (several hundreds) in a short time. Once a calibration curve has been obtained, e.g., using ene...... hiện toàn bộ
A novel Z-scheme Bi2WO6-based photocatalyst with enhanced dye degradation activity
Springer Science and Business Media LLC - Tập 21 - Trang 1-12 - 2019
To overcome the drawback caused by rapid recombination of photogenerated electron-hole pairs, a novel visible-light-driven Bi2WO6/r-GO/Bi25FeO40 Z-scheme photocatalyst was fabricated through the hydrothermal method. The as-prepared sample was analyzed by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), electrochemical impedanc...... hiện toàn bộ
Zinc imidazolate framework-8 nanoparticle application in oil removal from oil/water emulsion and reuse
Springer Science and Business Media LLC - - 2020
Water pollution is one of the biggest problems in the world and treatment is very important. ZIF-8 is a promising nanomaterial for water treatment. In this study, zinc imidazolate framework-8 (ZIF-8) nanoparticles were prepared via a solvothermal method. The synthesized were characterized by using several techniques and applied in emulsified oil/water separation and reuse. A combination of techniq...... hiện toàn bộ
Exciton-plasmon quantum metastates: self-induced oscillations of plasmon fields in the absence of decoherence in nanoparticle molecules
Springer Science and Business Media LLC - Tập 18 - Trang 1-9 - 2016
We investigate formation of unique quantum states (metastates) in quantum dot-metallic nanoparticle systems via self-induced coherent dynamics generated by interaction of these systems with a visible and an infrared laser fields. In such metastates, the quantum decoherence rates of the quantum dots can become zero and even negative while they start to rapidly change with time. Under these conditio...... hiện toàn bộ
Spectrally selective coatings of gold nanorods on architectural glass
Springer Science and Business Media LLC - Tập 12 Số 8 - Trang 2821-2830 - 2010
Folic acid mediated solid lipid nanocarriers loaded with docetaxel and oxidized single-walled carbon nanotubes
Springer Science and Business Media LLC - Tập 16 - Trang 1-10 - 2013
Single-walled carbon nanotubes (SWNT) possess high-near-infrared absorption coefficient, large surface area, and have great potential in drug delivery. In this study, we obtained ultrashort oxidized SWNT (OSWNT) using mixed acid oxidation method. Then, docetaxel (DTX) and folic acid (FA) are conjugated with OSWNT via π–π accumulation and amide linkage, respectively. A targeting and photothermal se...... hiện toàn bộ
Preferential cytotoxicity of ZnO nanoparticle towards cervical cancer cells induced by ROS-mediated apoptosis and cell cycle arrest for cancer therapy
Springer Science and Business Media LLC - Tập 18 - Trang 1-17 - 2016
The present study aimed to synthesize multifunctional ZnO-NP samples, namely ZnO-20, ZnO-40, and ZnO-80 nm, using different approaches, to be used as efficient anticancer agents. Systematic characterizations revealed their particle sizes and demonstrated nanostructures of nanorods (ZnO-80 nm) and nanogranules (ZnO-20 and ZnO-40 nm). They exhibited significant (p < 0.05) toxicity to HeLa cancer cel...... hiện toàn bộ
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