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A thermodynamic gauge for mobile counter-ions from colloids and nanoparticles

05-May-2015 | Albert P. Philipse; Bonny W. M. Kuipers; Agienus Vrij, Faraday Discussions, 2015

A thermodynamic equilibrium sensor is proposed that measures the ratio of the number of elementary charges z to the mass m of charged solutes such as charged colloids and nanoparticles. The sensor comprises a small, membrane-encapsulated salt solution volume that absorbs neutral salt molecules in ...

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Spectral Properties of Single Gold Nanoparticles in Close Proximity to Biological Fluorophores Excited by 2-Photon Excitation

24-Apr-2015 | Andrea Anzalone et al., PLoS ONE, 2015

by Andrea Anzalone, Manuela Gabriel, Laura C. Estrada, Enrico Gratton Metallic nanoparticles (NPs) are able to modify the excitation and emission rates (plasmonic enhancement) of fluorescent molecules in their close proximity. In this work, we measured the emission spectra of 20 nm Gold ...

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Interactions between nanoparticles and lung surfactant investigated by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry

24-Apr-2015 | Tashi Chhoden, Per Axel Clausen, Søren T. Larsen, Asger W. Nørgaard, Frants R. Lauritsen, Rapid Communications in Mass Spectrometry, 2015

Rationale Inhaled nanoparticles may cause adverse effects due to inactivation of lung surfactants. We have studied how three different nanoparticles interact with dipalmitoyl‐phosphatidylcholine (DPPC), the main component in lung surfactant. Methods DPPC in solution was mixed with a ...

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Enhanced Colloidal Stability of CeO2 Nanoparticles by Ferrous Ions: Adsorption, Redox Reaction, and Surface Precipitation

20-Apr-2015 | Xuyang Liu; Jessica R. Ray; Chelsea W. Neil; Qingyun Li; Young-Shin Jun, Environmental Science & Technology, 2015

Due to the toxicity of cerium oxide (CeO2) nanoparticles (NPs), a better understanding of the redox reaction-induced surface property changes of CeO2 NPs and their transport in natural and engineered aqueous systems is needed. This study investigates the impact of redox reactions with ferrous ...

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One-step synthesis of Ag–reduced graphene oxide–multiwalled carbon nanotubes for enhanced antibacterial activities

16-Apr-2015 | Leila Shahriary; Roopa Nair; Sushma Sabharwal; Anjali A. Athawale, New Journal of Chemistry, 2015

The present study reports a rapid one-step preparation of Ag nanoparticles decorated reduced graphene oxide–multiwalled carbon nanotube hybrids (Ag–rGO–MWCNTs) by heating a mixture of graphene oxide (GO), acid functionalized multiwalled carbon nanotubes (f-MWCNTs), and an aqueous solution of ...

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New Reactor Granule Technology for Highly Filled Nanocomposites: Effective Flame Retardation of Polypropylene/Magnesium Hydroxide Nanocomposites

15-Apr-2015 | Bulbul Maira, Patchanee Chammingkwan, Minoru Terano, Toshiaki Taniike, Macromolecular Materials and Engineering, 2015

A novel additive‐free reactor granule technology is reported for the fabrication of polyolefin‐based nanocomposites, which involves in situ generation of nanoparticles with unprecedented dispersion even at high filler loadings. Polypropylene reactor powder obtained by catalyzed propylene ...

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From single‐chain folding to polymer nanoparticles via intramolecular quadruple hydrogen‐bonding interaction

15-Apr-2015 | Fei Wang, Hongting Pu, Ming Jin, Haiyan Pan, Zhihong Chang, Decheng Wan, Jiang Du, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT Single‐chain folding via intramolecular noncovalent interaction is regarded as a facile mimicry of biomacromolecules. Single‐chain folding and intramolecular crosslinking is also an effective method to prepare polymer nanoparticles. In this study, poly(methyl ...

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Multi-analyte detection of chemical species using a conducting polymer nanowire-based sensor array platform

12-Apr-2015 | Author(s): Edward Song , Jin-Woo Choi, Sensors and Actuators B: Chemical, 2015

Publication date: August 2015 Source:Sensors and Actuators B: Chemical, Volume 215 Author(s): Edward Song , Jin-Woo Choi This paper proposes a novel sensing platform for a conducting polymer nanowire-based chemiresistive sensor array for multi-analyte detection capability. In order to ...

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Redox Mediated Synthesis of Fe3O4‐MnO2 Nanocomposite for Dye Adsorption and Pseudocapacitance

10-Apr-2015 | Tarasankar Pal, Ramkrishna Sahoo, Mukul Pradhan, Anindita Roy, Soumen Dutta, Chaiti Ray, Yuichi Negishi, Anjali Pal, Chemistry - An Asian Journal, 2015

A logically chosen redox reaction of submerged Fe(0) in aqueous KMnO4 solution has been reported. The template free reaction condition produced gram amount of hierarchical flower like Fe3O4‐MnO2 nanocomposite. More precisely fresh Fe(0) nanoparticles were prepared from air free hot water under ...

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A dispenser–reactor apparatus applied for in situ XAS monitoring of Pt nanoparticle formation

07-Apr-2015 | Jocenir Boita, Marcus Vinicius Castegnaro, Maria do Carmo Martins Alves, Jonder Morais, Journal of Synchrotron Radiation, 2015

In situ time‐resolved X‐ray absorption spectroscopy (XAS) measurements collected at the Pt L3‐edge during the synthesis of Pt nanoparticles (NPs) in aqueous solution are reported. A specially designed dispenser–reactor apparatus allowed for monitoring changes in the XAS spectra from the earliest ...

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