Colloids and Interface Science Communications This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Modulating physical, chemical, and biological properties of silver nanoparticles obtained by green synthesis using different parts of the tree Handroanthus heptaphyllus (Vell.) Mattos
Publication date: January 2020Source: Colloid and Interface Science Communications, Volume 34Author(s): Tatiane Melo Pereira, Vera Lucia Perussi Polez, Marcelo Henrique Sousa, Luciano Paulino SilvaAbstractGreen synthesis of silver nanoparticles (AgNPs) is already widely used, however, it presents challenges. This work describes a way to modulate the physicochemical characteristics of AgNPs using green synthesis and aqueous extract from different parts of Handroanthus heptaphyllus. The progress of the synthesis reaction, the physicochemical characteristics, and the biological activity against Escherichia coli and Staphyloco...
Source: Colloids and Interface Science Communications - December 14, 2019 Category: Nanotechnology Source Type: research

Electrophoretic deposition of flower-like CaBiVMoO8 particles for the photocatalytic degradation of pharmaceutical pollutants
Publication date: January 2020Source: Colloid and Interface Science Communications, Volume 34Author(s): A. Vázquez, S. Obregón, D.B. Hernández-UrestiAbstractIn this work, it is reported for the first time the preparation of CaBiVMoO8 coatings by the electrophoretic deposition route. The material exhibits absorption in the visible light region with a bandgap energy of 2.49 eV. In addition, the conduction and valence potentials were estimated at 0.07 and 2.56 eV, respectively. Isopropanol-based suspensions of CaBiVMoO8 were used for the formation of the EPD coatings at 10, 12 and 14 V. The photocatalytic performance...
Source: Colloids and Interface Science Communications - December 4, 2019 Category: Nanotechnology Source Type: research

Micellization, anti-proliferative activity and binding study of cationic gemini surfactants with calf thymus DNA
Publication date: Available online 27 November 2019Source: Colloid and Interface Science CommunicationsAuthor(s): Farooq Ahmad Wani, Kamalakanta Behera, Rayees Ahmad Padder, Mohammad Husain, Maqsood Ahmad Malik, Nada Shaeel Al-Thabaiti, Rabia Ahmad, Rajan PatelAbstractAggregation behaviour of two cation gemini surfactants i.e., 1,3-bis (1-decylbenzimidazolium) propane bromide BG10 and 1,3-bis (1-octylbenzimidazolium) propane bromide BG8 was studied using conductivity and dynamic light scattering (DLS). The enthalpy (∆Hmо), entropy (∆Smо) and Gibbs free energy of micellization (∆Gmо) have been observed from the con...
Source: Colloids and Interface Science Communications - November 28, 2019 Category: Nanotechnology Source Type: research

Preparation and stabilization of Ag nanoparticles with N-vinyl-2-pyrrolidone grafted-poly(vinyl alcohol) in an organic medium and investigation of their usability in the catalytic dye decolorization
Publication date: Available online 27 November 2019Source: Colloid and Interface Science CommunicationsAuthor(s): Meryem Kalkan ErdoğanAbstractTo obtain a copolymer with different substituent groups, N-vinyl-2-pyrrolidone (NVP) was grafted onto certain appendages of vinyl methacrylate introduced-poly(vinyl alcohol) PVA using AIBN. Then, PVA-g-NVP copolymer was used in the formation and stabilization of Ag nanoparticles in an organic medium without the use of reducing agents. The effects of volume ratio of the solvents, temperature, and concentrations of reactants were investigated for the formation of Ag nanoparticles. Th...
Source: Colloids and Interface Science Communications - November 27, 2019 Category: Nanotechnology Source Type: research

Influence of TiO2 nanostructure size and surface modification on surface wettability and bacterial adhesion
Publication date: Available online 15 November 2019Source: Colloid and Interface Science CommunicationsAuthor(s): Gaoqi Wang, Ding Weng, Chaolang Chen, Lei Chen, Jiadao WangAbstractThe aim of the study was to explore the synergistic effects of nanostructure size and surface treatment of TiO2 coatings on its wettability and bacteria adhesion. The coatings were fabricated by TiO2 particles with a diameter ranging from 25 nm to 300 nm. The surface wettability of coatings was tuned by chemical treatment. The anti-adhesion property of as-prepared coatings was evaluated with Streptococcus mutans in two types of solutions: ph...
Source: Colloids and Interface Science Communications - November 17, 2019 Category: Nanotechnology Source Type: research

Prediction of oil/water interfacial tension containing ionic surfactants
This study introduces a new approach to predict interfacial tension (IFT) at oil/water interfaces in the presence of ionic surfactants. Experimental data for sodium dodecylsulphate (SDS), decyltrimethylammonium bromide (C10TAB) and dodecyltrimethylammonium bromide (C12TAB) at hydrocarbon/water interfaces are used to validate the new approach. The model parameters, including molar surface area (ω) and bulk-surface distribution coefficient of surfactant (KS) are obtained by fitting the proposed equation to the literature data. The change of model parameters at different interfaces is discussed. In all cases investigated, th...
Source: Colloids and Interface Science Communications - November 14, 2019 Category: Nanotechnology Source Type: research

Gold nanoparticles deposited on silica microparticles - Electrokinetic characteristics and application in SERS
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Dawid Lupa, Magdalena Oćwieja, Natalia Piergies, Andrzej Baliś, Czesława Paluszkiewicz, Zbigniew AdamczykAbstractThe range of applicability of nanoparticle aggregates in surface enhanced Raman spectroscopy (SERS) sensing is limited. Therefore, in this work, an alternative route is developed consisting in a deposition of positively charged gold nanoparticles on silica carrier microparticles in an electrostatic interaction driven colloidal self-assembly process. The obtained composite particles of a raspberry structure...
Source: Colloids and Interface Science Communications - November 9, 2019 Category: Nanotechnology Source Type: research

Comparison of the effects of various supporting electrolytes on the treatment of a dye solution by electrocoagulation process
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Ramazan Keyikoglu, Orhan Taner Can, Ahmet Aygun, Ahu TekAbstractLaboratory experiments were conducted to investigate the effect of some supporting electrolytes on the treatment of Reactive Black 5 (RB5) by electrocoagulation using aluminum and iron electrode couples. Electrolytes, which contain Cl−, SO42−, NO− anions and Na+, K+, NH4+ cations, were compared in terms of color removal efficiencies. The presence of SO42− led to poor performances with aluminum electrodes yielding a removal efficiency close to 45% at...
Source: Colloids and Interface Science Communications - November 8, 2019 Category: Nanotechnology Source Type: research

Effects of head group and counter-ion variation in cationic surfactants on the microstructures of EO-PO block copolymer micelles
This study reports the effect of several cationic surfactants namely C16TABr,C16TPPBr, C16TBPBr, C16PyBr, C16TACl and C16TATs, each with 16C long alkyl side chain but different counterions and head groups on the micellar behavior of an ethylene oxide-propylene oxide (EO-PO) linear triblock copolymer, Pluronic® 103 from cloud point (CP), dynamic light scattering (DLS) and small angle neutron scattering (SANS) measurements. The solubilizing capacity of the mixed system was also checked for a poorly water soluble drug quercetin (QN). We show that cationic surfactants in the aqueous copolymeric system enhanced the surface cha...
Source: Colloids and Interface Science Communications - November 8, 2019 Category: Nanotechnology Source Type: research

In-situ synthesis of magnetic nanoparticle immobilized heterogeneous catalyst through mussel mimetic approach for the efficient removal of water pollutants
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Tushar Kanti Das, Sayan Ganguly, Sabyasachi Ghosh, Sanjay Remanan, Suman Kumar Ghosh, Narayan Ch. DasAbstractNaturally occurring 2:1 layered phyllosilicate tactoids decorated by in situ synthesized magnetite nanoparticles via mussel inspired surface chemistry. Polydopamine has been exploited here to promote surface energy of the clay tactoids resulting in fast anchoring of magnetic nanoparticles (MNP) on to the phyllosilicate layers. Such a typical metal-organic framework based heterogeneous catalyst has immense interes...
Source: Colloids and Interface Science Communications - November 6, 2019 Category: Nanotechnology Source Type: research

Influence of ligand's thermal stability on size and self-assembly of Cu nanoparticles
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Mohammed R. Chandan, Aabid Hussain ShaikAbstractIn this work, we report the effect of thermal stability of various capping ligands in modified digestive ripening (MDR) technique for probing the mechanism of formation of self-assembled monodipserse Cu nanoparticles from the polydisperse Cu nanoparticles. Narrowing of the size distribution of monodisperse Cu nanoparticles after modified digestive ripening process is strongly dependent on the thermal stability of capping ligands. Various capping ligands such as dodecanethi...
Source: Colloids and Interface Science Communications - November 6, 2019 Category: Nanotechnology Source Type: research

Optimization of ciprofloxacin adsorption from synthetic wastewaters using γ-Al2O3 nanoparticles: An experimental design based on response surface methodology
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Ali Asghar Najafpoor, Omid Nemati Sani, Hossein Alidadi, Mohsen Yazdani, Ali Asghar Navaei Fezabady, Mahmoud TaghaviAbstractPollution of water resources and the environment by antibiotics is one of the most concerning environmental issues. So, this study investigates adsorption of ciprofloxacin, as a common antibiotic and an emerging pollutant, onto γ-Al2O3 nanoparticles (NPs) and evaluates the effect of the operational parameters and their interactions using central composite design. Furthermore, the adsorption proces...
Source: Colloids and Interface Science Communications - November 3, 2019 Category: Nanotechnology Source Type: research

Facile green synthesis of silver nanoparticles using Crocus Haussknechtii Bois bulb extract: Catalytic activity and antibacterial properties
In this study, the extract of Crocus Haussknechtii Bois was used to synthesize small-sized AgNPs and the effective parameters were investigated. The experimental optimization of temperature and pH reveals that spherical nanoparticles with a size of about 10–25 nm could be obtained using 0.5 mL of AgNO3 (20 mM) and 0.5 mL of the plant extract with total volume of 20 mL at pH = 7 and temperature of 75 °C within 120 min. The catalytic activity of synthesized nanoparticles was evaluated in the degradation of a Congo Red dye in the presence of sodium borohydride. The results indicate that 16.67 μM Congo ...
Source: Colloids and Interface Science Communications - October 25, 2019 Category: Nanotechnology Source Type: research

Kinetic and plasmonic properties of gold nanorods adsorbed on glass substrates
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Marina V. Gutiérrez, Alberto F. ScarpettiniAbstractMonodisperse gold nanorods with different sizes were synthesized and adsorbed on chemically modified glass substrates. Influence of surfactant molar concentration on nanorod adsorption was studied and the optimum range was determined. During substrate coverages we monitored the growth of longitudinal localized surface plasmon resonances at short times due to density increase of isolated nanorods and, at longer times, their subsequent decrease and a concurrent growth of...
Source: Colloids and Interface Science Communications - October 24, 2019 Category: Nanotechnology Source Type: research

Core/shell phosphomolybdic acid-supported magnetic silica nanocomposite (Ni@SiO2-PMo): Synthesis, characterization and its application as a recyclable antibacterial agent
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Taymaa A. Jabbar, Saad H. AmmarAbstractIn the present work, phosphomolybdic acid (PMo) supported on silica coated magnetic Ni core/shell nanocomposite (Ni@SiO2-PMo) was synthesized and characterized. The antibacterial property of synthesized Ni@SiO2-PMo magnetic nanocomposite has been investigated for the first time against Gram-negative bacteria (E. coli) using micro dilution approach. Furthermore, the cytotoxic effect (cell viability) of Ni@SiO2/PMo has been investigated on breast cancer cell line (MCF-7) and normal h...
Source: Colloids and Interface Science Communications - October 24, 2019 Category: Nanotechnology Source Type: research