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PubMed Journal Database | Journal of colloid and interface science RSS

07:44 EST 21st November 2018 | BioPortfolio

The US National Library of Medicine and National Institutes of Health manage PubMed.gov which comprises of more than 21 million records, papers, reports for biomedical literature, including MEDLINE, life science and medical journals, articles, reviews, reports and  books.  BioPortfolio aims to publish relevant information on published papers, clinical trials and news associated with users selected topics.

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Showing PubMed Articles 1–25 of 2,500+ from Journal of colloid and interface science

Self-assembly of intramolecularly hydrogen-bonded amphiphilic diboronic acid for saccharide recognition.

The designed organic boronic acid molecule featuring both hydrophilic and hydrophobic moieties, makes a potential functional surfactant. Selective recognition of saccharides through morphological changes of phenylboronic acid-based self-assembly system by saccharide stimulation is a key concept in boronic acid design.

Vascular endothelial growth factor immobilized on mussel-inspired three-dimensional bilayered scaffold for artificial vascular graft application: In vitro and in vivo evaluations.

Currently, there is a great clinical demand for biocompatible and robust tissue-engineered tubular scaffolds for use as artificial vascular graft materials. Despite considerable research on vascular scaffolds, there has still been only limited development of scaffold materials possessing both sufficient mechanical strengths and biological effects for vascular application. In this work, we designed a mechanically robust, bilayered scaffold and manufactured it by combining electrospinning (ELSP) and three-dim...

Hexagonal SnS nanoplates assembled onto hierarchical BiWO with enhanced photocatalytic activity in detoxification and disinfection.

A novel Z-scheme heterostructure, SnS nanoplates deposited BiWO, was successfully fabricated via a simple bath sonication method. The positive synergetic effect between SnS and BiWO greatly improved the photocatalytic activity of SnS-BiWO composites in dye degradation and bacterial inactivation. Under visible light irradiation, the photocatalytic degradation activity of SnS-BiWO composites (0.50 wt% SnS) was about 5.8 times higher than that of pure BiWO. As for the disinfection experiment, the survival ra...

Ion transport in a pH-regulated conical nanopore filled with a power-law fluid.

Extending previous electrokinetic analyses based on a Newtonian fluid to power-law fluids, we investigate the behaviors of the ion current rectification (ICR) and the ion selectivity S of a conical nanopore having a pH-regulated surface. The bulk salt concentration C, the solution pH, and the power-law index n are examined in detail for their influences on these behaviors. We show that the ICR ratio for the case where pH is lower than the isoelectric point (IEP) of the nanopore surface is different both qua...

Twisted palladium-copper nanochains toward efficient electrocatalytic oxidation of formic acid.

Twisted PdCu nanochains are synthesized successfully via a staged thermal treatment route, offering rich twin boundaries as catalytic "active sites" and modified electronic effects. Toward formic acid oxidation, the twisted PdCu nanochains hold the highest catalytic peak current density (1108.2 mA mg) over previous reported PdCu alloy catalysts, and also much higher catalytic activity and durability comparing with Pd nanochains and commercial Pd/C. The catalytic enhancement mechanism to PdCu nanochains ...

Heteroatom-doped carbon dots based catalysts for oxygen reduction reactions.

Carbon materials doped with heteroatoms are a class of cost-effective and stable electrocatalysts for oxygen reduction reactions (ORR), whose activities are mainly based on the heteroatom-related active sites. Besides the widely reported one-dimensional carbon nanotubes and two-dimensional graphene materials, carbon dots (CDs), as a new kind of zero-dimensional carbon materials, exhibit a range of unique structures and promising catalytic activities for ORR. In order to optimize the complex conditions of ca...

Capacitative deionization using commercial activated carbon fiber decorated with polyaniline.

Capacitive deionization (CDI) has become a promising technology for water desalination due to its remarkable advantages including low operation cost, no secondary pollution and high rate of ion recovery. However, the majority of commercial CDI electrode materials are carbonaceous materials such as activated carbon with limited capacitance and high charge transfer resistance, which significantly hinders the wide application of CDI. Herein, we demonstrate a N-doped carbonaceous CDI electrode with a maximum io...

Photocatalytic reduction of Cr (VI) on nano-sized red phosphorus under visible light irradiation.

Red phosphorus as a novel visible-light-responsive and metal-free photocatalyst has attracted extensive attention in the area of energy conversion and environmental remediation. Herein, nano-sized red phosphorus photocatalyst was synthesized via a hydrothermal and ultrasonic method and used for reduction of Cr (VI) for the first time. The as-prepared photocatalysts were characterized by XRD, UV-Vis-DRS, XPS, SEM, TEM and photoelectrochemical measurements. Compared to bulk red phosphorus, nano-sized red phos...

Controlled synthesis of metal-organic frameworks coated with noble metal nanoparticles and conducting polymer for enhanced catalysis.

The combination of noble metal nanoparticles (NM NPs) and metal-organic frameworks (MOFs) for enhanced properties in catalysis is a rapidly developing interdisciplinary research field. Herein we report a facile one-step approach to the deposition of functional nanocomposite shell composed of NM NPs and conducting polymer on the surface of particulate UiO-66. Our approach is based on the recently developed double solvents method involving a hydrophobic solvent (n-hexane) and a hydrophilic solvent (water). Pa...

Colloidal systems chemistry. Replication, reproduction and selection at nanoscale.

Development of synthetic systems carrying life-like features is a long-standing challenge in chemistry and material science. Poor understanding of mechanisms ruling the emergence of life-like features in an inanimate matter makes the challenge even more exciting. The growing field of systems chemistry takes the lead in defining life-like dynamic signatures in minimalistic (macro)molecular systems through the development of multicomponent synthetic models using tools from organic and supramolecular chemistry...

Designing transition metal alloy nanoparticles embedded hierarchically porous carbon nanosheets as high-efficiency electrocatalysts toward full water splitting.

Developing high-efficiency catalysis electrodes towards both HER (hydrogen evolution reaction) and OER (oxygen evolution reaction) is critical to the popularity and practical application of devices for conversion and storage of clean and renewable hydrogen energy by overall water splitting. In this paper, a series of transition metal alloy nanoparticles embedded hierarchically porous carbon nanosheets (denoted as FeCo@PCNSs) have been successfully designed and synthesized. After optimizing the metallic cont...

Investigating the redox behavior of activated carbon supercapacitors with hydroquinone and p-phenylenediamine dual redox additives in the electrolyte.

Activated carbon (AC) with large surface area and high electrical conductivity is widely applied on supercapacitors (SC), but the energy storage mechanism for the pure electrical double layer capacitor of carbon leads to a low energy density. Developing stable aqueous electrolytes with abundant redox reactions via incorporating more than one redox additive in the electrolyte is one of the efficient strategies to improve the energy storage capacity of the AC-based SC. In this study, the dual redox additives ...

Ultra-efficient electromagnetic wave absorption with ethanol-thermally treated two-dimensional NbCT nanosheets.

NbCT, an emerging type of MXene, should be a promising electromagnetic wave (EMW) absorbing material to overcome the EMW pollution nowadays due to its unique layered structure and extremely thin monolayer thickness, but was lack of systematic study till now. Meanwhile, NbCT nanosheets obtained upon HF etching of NbAlC MAX was unfortunately found with limited absorption performance due to its mainly dielectric loss mechanism herein. Therefore, the NbCT nanosheets were further treated with solvothermal strate...

Nanodiamonds conjugated upconversion nanoparticles for bio-imaging and drug delivery.

A multifunctional nanoplatform with simultaneous imaging and therapeutic capacities has been fabricated by covalently conjugating nanodiamonds (NDs) with upconversion NaYF:Yb,Er nanoparticles (UCNPs). Green emission can be observed for the UCNP-NDs composites under 980 nm excitation, and in vitro imaging was carried out towards HeLa cells. The UCNP-NDs also shows good drug storage capability toward anticancer drug doxorubicin (Dox) and exhibits significant pH-dependent drug-release behavior. Dox-loaded UC...

Bimetallic Mn and Co encased within bamboo-like N-doped carbon nanotubes as efficient oxygen reduction reaction electrocatalysts.

The development of oxygen reaction reduction (ORR) electrocatalysts that are low-cost, highly-active and have long-term stability for use in energy conversion and storage applications such as fuel cells and metal-air batteries is very important. In this paper, a facile one-step pyrolysis method was used to prepare bamboo-like N-doped carbon nanotubes (BNCNTs) as effective ORR electrocatalysts. Manganese and cobalt salts were used as the metal precursors, and urea was the C and N source. The resulting cataly...

Synthesis and characterization of bacteriochlorin loaded magnetic nanoparticles (MNP) for personalized MRI guided photosensitizers delivery to tumor.

Hydrophobic bacteriochlorin based photosensitizer (PS) can be effectively immobilized on MNP covered by human serum albumin (HSA). PS loading into MNP protein shell allows solubilizing PS in water solution without altering its photodynamic activity. MNP@PS can serve as diagnostic tool for tracking PS delivery to tumor tissues by MRI.

Ultrathin manganese oxide nanosheets uniformly coating on carbon nanocoils as high-performance asymmetric supercapacitor electrodes.

Two key limitations affecting supercapacitor application of manganese oxide (MO) are the poor electric conductivity and low accessible surface area. In this work, we reported an effective method to fabricate lamellar MO coating on carbon nanocoil (CNC) and investigated its supercapacitive properties. The elegant MO/CNC core shell structure enabled synergistic effects from both MO nanosheets and CNC by using nanosheets to provide a large interaction area for ion transport and CNC to improve the electric cond...

Solid-state speciation of interlayer anions in layered double hydroxides.

Layered double hydroxides (LDH) have been proposed for phosphate (PO) recovery and recycling from waste streams due to their high anion exchange capacity, good stability and high affinity towards PO. The high affinity towards PO strongly relates to the electrostatic interaction with PO, and thus the charge of PO. However, the anion speciation of intercalated PO, i.e. either HPO, HPO or PO is often overlooked. This study was set up to measure solid phase PO speciation through ion exchange stoichiometry, X-ra...

Membrane targeting cationic antimicrobial peptides.

Many short cationic peptides are amphiphilic and are often termed antimicrobial peptides (AMPs) as they can kill various microorganisms. These AMPs have largely been discovered from nature, but over the past two decades many biomimetic and de novo designed AMPs have been reported, offering a huge variety of attractive properties for further exploitation. Under the current global endeavour of fighting against antimicrobial resistance, it is useful to introduce AMPs to the biointerface research community and ...

Synergetic enhancement of mechanical and fire-resistance performance of waterborne polyurethane by introducing two kinds of phosphorus-nitrogen flame retardant.

In this work, a novel hydroxyl-terminated monomer containing phosphorus and nitrogen, tri(N, N-bis-(2-hydroxy-ethyl) acyloxoethyl) phosphate (TNAP), was synthesized successfully with phosphorus oxychloride, hydroxyethyl acrylate, and diethanolamine as raw materials, and then incorporated into flame-retarded waterborne polyurethanes to improve their flame retardancy, thermal behavior, and mechanical properties. Their structures were confirmed by nuclear magnetic resonance (NMR) and fourier transform infrared...

Enhanced long-wavelength light utilization with polyaniline/bismuth-rich bismuth oxyhalide composite towards photocatalytic degradation of antibiotics.

Antibiotics in natural waters have posed serious threats to our ecosystem due to its potent biological toxicity. In the present work, a visible-light-driven PANI/BiOBr composite photocatalyst was fabricated and used for the degradation of ciprofloxacin (CIP) and tetracycline (TC) antibiotics under visible light (λ > 420 nm). The PANI/BiOBr composite presented a significantly improved ability of CIP and TC photodegradation, which is about 2.2 times and 1.6 times to that of BiOBr, respectively. The p...

Uniform mesoporous carbon hollow microspheres imparted with surface-enriched gold nanoparticles enable fast flow adsorption and catalytic reduction of nitrophenols.

Adsorption and catalytic conversion of nitrophenols (NPs) over carbon-based materials have attracted wide interest. Batch adsorption and catalytic reduction of NPs have been widely reported, but less attention has been paid to flow systems, which require high particle size uniformity and superior active site accessibility. Herein, uniform mesoporous carbon hollow microspheres with their surfaces enriched by Au nanoparticles (denoted as Au@UMCHMs) are synthesized. The surface-enriched Au nanoparticle loading...

Armoured nanobubbles; ultrasound contrast agents under pressure.

Robust methods for differentiating long-lived nanobubbles from other nanoparticles are required. Evaluation of the density and compressibility of nanoparticles should enable nanobubbles to be differentiated from other nanoparticles, although the response of nanobubbles to pressure can be strongly influenced by a coating of insoluble surfactant. Here we evaluate the response of nanobubbles armoured with a coating of insoluble surfactants in order to determine if they can be differentiated from other nanopart...

Towards highly efficient and low-cost oxygen evolution reaction electrocatalysts: An effective method of electronic waste management by utilizing waste Cu cable wires.

Currently, electronic waste (e-waste) is the world's most challenging and rapidly growing problem in the waste stream. To develop an alternative way to use e-waste (waste copper (Cu) wires) to accelerate the oxygen evolution reaction (OER) of water electrolysis, the waste Cu wires are used as a low-cost current collector. We demonstrate a simple electrodeposition process to deposit nickel-iron hydroxide (NiFe LDH) nanosheets on self-supported copper hydroxide (Cu(OH)/Cu) nanowires grown via chemical-oxidati...

Nickel induced in situ growth of nickel hydroxide nanoflakes on reduced graphite oxide with high energy and power density.

Layered hexagonal Ni(OH) nanoflakes have been successfully fabricated on the surface of reduce graphite oxide (rGO) via nickel induced in situ growth in this study. The layers number and size of Ni(OH) nanoflakes could be controlled by adjusting the concentration of Ni precursors with nickel as active site on rGO surface. In the three electrode systems, the composite showed a relatively high specific capacitance achieved 1012.2 F∙g at current density of 1 A∙g with coulombic efficiency of 98.3%. As a...


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