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https://www.readbyqxmd.com/read/28800236/inorganic-nanoparticles-induced-morphological-transition-for-confined-self-assembly-of-block-copolymers-within-emulsion-droplets
#1
Yan Zhang, Yun He, Nan Yan, Yutian Zhu, Yuexin Hu
Recently, it has been reported that the incorporation of functional inorganic nanoparticles (NPs) into the three-dimension (3D) confined self-assembly of block copolymers (BCPs) creates the unique nanostructured hybrid composites, which can not only introduce new functions to BCPs but also induce some interesting morphological transitions of BCPs. In the current study, we systematically investigate the cooperative self-assembly of a series of size-controlled and surface chemistry-tunable gold nanoparticles (AuNPs) and polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) diblock copolymer within the emulsion droplets...
August 11, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28795495/thiol-ene-click-reaction-as-a-facile-and-general-approach-for-surface-functionalization-of-colloidal-nanocrystals
#2
Bin Liu, Xiaoran Deng, Zhongxi Xie, Ziyong Cheng, Piaoping Yang, Jun Lin
Oleic acid (OA) and/or oleylamine (OAm) are generally used as the surface ligands for stabilization of inorganic nanocrystals (NCs). The hydrophobic and inert surface of the NCs limits their applications such as in biomedical areas. Hence, surface modifications are essential in many physical and chemical processes. Here, a facile and versatile strategy is reported for the modification of NCs by ultraviolet-induced thiol-ene chemistry, in which thiol-terminated poly(ethylene glycol) (HSPEG) and its derivatives can react directly with double bonds in OA/OAm ligands to form covalent linking within one step...
August 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28790423/decoupling-between-the-response-of-coral-calcifying-fluid-ph-and-calcification-to-ocean-acidification
#3
S Comeau, C E Cornwall, M T McCulloch
Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783188/a-review-of-flexible-lithium-sulfur-and-analogous-alkali-metal-chalcogen-rechargeable-batteries
#4
REVIEW
Hong-Jie Peng, Jia-Qi Huang, Qiang Zhang
Flexible energy storage systems are imperative for emerging flexible devices that are revolutionizing our life. Lithium-ion batteries, the current main power sources, are gradually approaching their theoretical limitation in terms of energy density. Therefore, alternative battery chemistries are urgently required for next-generation flexible power sources with high energy densities, low cost, and inherent safety. Flexible lithium-sulfur (Li-S) batteries and analogous flexible alkali metal-chalcogen batteries are of paramount interest owing to their high energy densities endowed by multielectron chemistry...
August 7, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28780875/preface-for-the-advances-in-main-group-inorganic-chemistry-forum
#5
Philip P Power, Ching-Wen Chiu
No abstract text is available yet for this article.
August 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28777567/inorganic-nanotubes-and-fullerene-like-nanoparticles-at-the-crossroad-between-solid-state-chemistry-and-nanotechnology
#6
Bojana Višić, Leela S Panchakarla, Reshef Tenne
Inorganic nanotubes and fullerene-like nanoparticles of WS2 were discovered some 25 years ago and are produced now on a commercial scale for various applications. This "Perspective" is dedicated to a brief description of recent progress in this scientific discipline. The conceptual evolution leading to their discovery, is briefly discussed. Subsequently, the recent progress with the synthesis of such nanoparticles from variety of inorganic compounds with layered (2D) structure is described. In particular, the synthesis of nanotubes from chalcogenide- and oxide-based ternary misfit layered compounds is discussed as well as their structure and different growth-mechanisms...
August 4, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28771006/continuous-hydrothermal-synthesis-of-inorganic-nanoparticles-applications-and-future-directions
#7
Jawwad A Darr, Jingyi Zhang, Neel M Makwana, Xiaole Weng
Nanomaterials are at the leading edge of the emerging field of nanotechnology. Their unique and tunable size-dependent properties (in the range 1-100 nm) make these materials indispensable in many modern technological applications. In this Review, we summarize the state-of-art in the manufacture and applications of inorganic nanoparticles made using continuous hydrothermal flow synthesis (CHFS) processes. First, we introduce ideal requirements of any flow process for nanoceramics production, outline different approaches to CHFS, and introduce the pertinent properties of supercritical water and issues around mixing in flow, to generate nanoparticles...
August 3, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28766633/structure-and-reactivities-of-rhenium-and-technetium-bis-arene-sandwich-complexes-m-%C3%AE-6-arene-2
#8
Giuseppe Meola, Henrik Braband, Sara Jordi, Thomas Fox, Olivier Blacque, Bernhard Spingler, Roger Alberto
Sandwich complexes are important building blocks in medicinal inorganic chemistry for group 6 and 8 elements but are almost unknown for the manganese triad. We present the syntheses and full characterization of the mixed-arene (99)Tc sandwich complexes [(99)Tc(η(6)-hmbz)(η(6)-C6H5-NH3)](PF6)2 and [(99)Tc(η(6)-hmbz)(η(6)-C6H5-Br)](PF6). Both comprise functionalities for conjugation to targeting molecules or for being included as substructures in pharmaceutically active lead compounds. Since η(6)-benzene ligands are too stably bound to be replaced with incoming ligands, we prepared naphthalene complexes [Re(η(6)-C6H6)(η(6)-napht)](+) and [Re(η(6)-napht)2](+)...
August 2, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28763123/laying-waste-to-mercury-inexpensive-sorbents-made-from-sulfur-and-recycled-cooking-oils
#9
Max Worthington, Renata Kucera, Ines Albuquerque, Christopher Gibson, Alexander Sibley, Ashley Slattery, Jonathan Campbell, Salah Alboaiji, Katherine Muller, Jason Young, Nick Adamson, Jason Gascooke, Deshetti Jampaiah, Ylias Sabri, Suresh Bhargava, Samuel Ippolito, David Lewis, Jamie Quinton, Amanda Ellis, Alexander Johs, Gonçalo Bernardes, Justin M Chalker
Mercury pollution threatens the environment and human health across the globe. This neurotoxic substance is encountered in artisanal gold mining, coal combustion, oil and gas refining, waste incineration, chloralkalai plant operation, metallurgy, and areas of agriculture in which mercury-rich fungicides are used. Thousands of tonnes of mercury are emitted annually through these activities. With the Minamata Convention on Mercury entering force this year, increasing regulation of mercury pollution is imminent...
August 1, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28759726/inorganic-nanoparticles-as-donors-in-resonance-energy-transfer-for-solid-phase-bioassays-and-biosensors
#10
Yi Han, M Omair Noor, Abootaleb Sedighi, Uvaraj Uddayasankar, Samer Doughan, Ulrich J Krull
Bioassays for the rapid detection and quantification of specific nucleic acids, proteins, and peptides are fundamental tools in many clinical settings. Traditional optical emission methods have focused on the use of molecular dyes as labels to track selective binding interactions and as probes that are sensitive to environmental changes. Such dyes can offer good detection limits based on brightness but typically have broad emission bands and suffer from time-dependent photobleaching. Inorganic nanoparticles such as quantum dots and upconversion nanoparticles are photostable over prolonged exposure to excitation radiation and tend to offer narrow emission bands, providing a greater opportunity for multiwavelength multiplexing...
August 11, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28759069/the-mechanism-for-the-formation-of-oh-radicals-in-condensed-phase-water-under-ultraviolet-irradiation
#11
Fan Jin, Min Wei, Chengbu Liu, Yuchen Ma
Irradiation on liquid water and ice by ultraviolet light in the range of 150-200 nm can create volatile OH radicals which react with other organic and inorganic molecules actively. However, the mechanism for OH radical formation in the condensed-phase water in this energy range is still unclear. To uncover this mechanism we studied the excited-state behaviors of ice using first-principles calculations based on many-body Green's function theory. First, we showed that the long-wavelength optical absorption at the Urbach tail (190-300 nm) can be attributed to inherent hydroxide ions or transient structures formed in the autoionization process...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28749653/measurement-and-surface-complexation-modeling-of-u-vi-adsorption-to-engineered-iron-oxide-nanoparticles
#12
Zezhen Pan, Wenlu Li, John D Fortner, Daniel E Giammar
Surface-functionalized magnetite nanoparticles have high capacity for U(VI) adsorption and can be easily separated from the aqueous phase by applying a magnetic field. A surface-engineered bilayer structure enables the stabilization of nanoparticles in aqueous solution. Functional groups in stearic acid (SA), oleic acid (OA), and octadecylphosphonic acid (ODP) coatings led to different adsorption extents (SA≈ OA > ODP) under the same conditions. The impact of water chemistry (initial loading of U(VI), pH, and the presence of carbonate) has been systematically examined for U(VI) adsorption to OA-coated nanoparticles...
July 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28745890/the-role-of-thermal-activation-and-molecular-structure-on-the-reaction-of-molecular-surfaces
#13
Gregory J Deye, Juvinch R Vicente, Shawn M Dalke, Selma Piranej, Jixin Chen, Jacob W Ciszek
Though surface modifications of organic thin-films dramatically improve optoelectronic device performance, chemistry at organic surfaces presents new challenges that are not seen in conventional inorganic surfaces. This work demonstrates that the subsurface of pentacene remains highly accessible, even to large adsorbates, and that three distinct reaction regimes (surface, subsurface, and bulk) are accessed within a narrow thermal range 30-75 ºC. Progression of this transition is quantitatively measured via polarized modulation infrared reflection absorption spectroscopy (PM-IRRAS), and atomic force microscopy (AFM) is used to measure the thin-film morphology...
July 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28740163/determination-of-the-solid-electrolyte-interphase-structure-grown-on-a-silicon-electrode-using-a-fluoroethylene-carbonate-additive
#14
Gabriel M Veith, Mathieu Doucet, Robert L Sacci, Bogdan Vacaliuc, J Kevin Baldwin, James F Browning
In this work we explore how an electrolyte additive (fluorinated ethylene carbonate - FEC) mediates the thickness and composition of the solid electrolyte interphase formed over a silicon anode in situ as a function of state-of-charge and cycle. We show the FEC condenses on the surface at open circuit voltage then is reduced to C-O containing polymeric species around 0.9 V (vs. Li/Li(+)). The resulting film is about 50 Å thick. Upon lithiation the SEI thickens to 70 Å and becomes more organic-like. With delithiation the SEI thins by 13 Å and becomes more inorganic in nature, consistent with the formation of LiF...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735065/time-required-for-resetting-postural-effects-on-serum-constituents-in-healthy-individuals
#15
Yoshihisa Shimizu, Kiyoshi Ichihara, Katsunori Kouguchi
OBJECTIVE: We investigated postural effects on concentrations of commonly measured serum analytes and sought for optimal duration of sitting before venipuncture in an outpatient setting. METHODS: Seven healthy volunteers changed posture serially at 30-minute (min) intervals from lying, sitting, slowly walking, sitting, and to lying again. At the end of the first lying posture, wing-needle was inserted into cubital vein and 3mL of blood was drawn every 5min. All the serum was stored at -80°C until the time of collective measurements for 16 major chemistry analytes two weeks later...
July 19, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28730356/seasonal-variation-of-chemical-composition-and-source-apportionment-of-pm2-5-in-pune-india
#16
Ranjeeta D Gawhane, Pasumarthi Surya Prakasa Rao, Krishnakant B Budhavant, Vinayak Waghmare, Dhananjay C Meshram, Pramod D Safai
Particulate matter with size less than or equal to 2.5 μm (PM2.5) samples were collected from an urban site Pune, India, during April 2015 to April 2016. The samples were analyzed for various chemical constituents, including water soluble inorganic ions, organic carbon (OC), and elemental carbon (EC). The yearly mean total mass concentration of PM2.5 at Pune was 37.3 μg/m(3), which is almost four times higher than the annual WHO standard (10 μg/m(3)), and almost equal to that recommended by the Central Pollution Control Board, India (40 μg/m(3))...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28730213/magnetic-separation-its-application-in-mining-waste-purification-medicine-biochemistry-and-chemistry
#17
REVIEW
M Iranmanesh, J Hulliger
The use of strong magnetic field gradients and high magnetic fields generated by permanent magnets or superconducting coils has found applications in many fields such as mining, solid state chemistry, biochemistry and medical research. Lab scale or industrial implementations involve separation of macro- and nanoparticles, cells, proteins, and macromolecules down to small molecules and ions. Most promising are those attempts where the object to be separated is attached to a strong magnetic nanoparticle. Here, all kinds of specific affinity interactions are used to attach magnetic carrier particles to mainly objects of biological interest...
July 21, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28727218/altered-sediment-biota-and-lagoon-habitat-carbonate-dynamics-due-to-sea-cucumber-bioturbation-in-a-high-pco2-environment
#18
Kennedy Wolfe, Francisco Vidal-Ramirez, Sophie Dove, Dione Deaker, Maria Byrne
The effects of global change on biological systems and functioning are already measureable, but how ecological interactions are being altered is poorly understood. Ecosystem resilience is strengthened by ecological functionality, which depends on trophic interactions between key species and resilience generated through biogenic buffering. Climate-driven alterations to coral reef metabolism, structural complexity and biodiversity are well documented, but the feedbacks between ocean change and trophic interactions of non-coral invertebrates are understudied...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28725901/zinc-binding-sites-in-pra1-a-zincophore-from-candida-albicans
#19
Dorota Łoboda, Magdalena Rowińska-Żyrek
The aim of this work is to understand the interactions of Zn(ii) with Pra1, a zincophore from Candida albicans, one of the most common causes of serious fungal infections in humans. Pra1 is a 299 amino acid protein, secreted from the fungus to specifically bind Zn(ii) and deliver it to a transmembrane zinc transporter, Zrt1. We take the first step towards understanding the bioinorganic chemistry of this process, by pointing out the Zn(ii) binding sites in Pra1 and understanding the thermodynamics of such interactions...
July 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28719021/high-temperature-ionic-epitaxy-of-halide-perovskite-thin-film-and-the-hidden-carrier-dynamics
#20
Yiping Wang, Xin Sun, Zhizhong Chen, Yi-Yang Sun, Shengbai Zhang, Toh-Ming Lu, Esther Wertz, Jian Shi
High-temperature vapor phase epitaxy (VPE) has been proved ubiquitously powerful in enabling high-performance electro-optic devices in III-V semiconductor field. A typical example is the successful growth of p-type GaN by VPE for blue light-emitting diodes. VPE excels as it controls film defects such as point/interface defects and grain boundary, thanks to its high-temperature processing condition and controllable deposition rate. For the first time, single-crystalline high-temperature VPE halide perovskite thin film has been demonstrated-a unique platform on unveiling previously uncovered carrier dynamics in inorganic halide perovskites...
July 18, 2017: Advanced Materials
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