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Showing 1-30 of 32 results for "409030" within Papers
Lokesh S Koodlur
Bioelectrochemistry (Amsterdam, Netherlands), 91, 21-27 (2013-01-22)
A self-assembled molecular film of a water-soluble cobalt tetrasulfophthalocyanine was deposited on a gold substrate premodified with poly(diallyldimethylammonium chloride). The process of layer-by-layer assembly on the gold substrate was characterized using UV-Vis, Raman spectroscopy, ellipsometry, contact angle measurements, atomic force
Aleš Panáček et al.
Colloids and surfaces. B, Biointerfaces, 110, 191-198 (2013-06-05)
Nanocomposites consisting of diatomaceous earth particles and silver nanoparticles (silver NPs) with high antimicrobial activity were prepared and characterized. For the purpose of nanocomposite preparation, silver NPs with an average size of 28nm prepared by modified Tollens process were used.
Jian Zhang et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 13(11), 2671-2675 (2012-05-24)
Photoresponsive polymeric films fabricated by a facile electrostatic self-assembly technique are utilized to switch protein adsorption by light irradiation. The introduction of SiO(2) nanoparticles on the substrate results in a large reversible change of both wettability and protein adsorption.
Shear thickening behavior of dilute poly(diallyl dimethyl ammonium chloride) aqueous solutions
Wen-Hong Liu, et al.
Polymer, 48, 4152-4165 (2007)
Xueque You et al.
Journal of nanoscience and nanotechnology, 13(11), 7349-7357 (2013-11-20)
We have reported the preparation and characterization of a novel, freestanding, paper-like graphene (G)-poly(diallyldimethylammoniumchloride) (PDDA)-Fe3O4 nanoparticles (NPs) composite. This G-based flexible buckypaper (BP) composed of stacked G-PDDA-NP platelets exhibited excellent mechanical properties, superior electrical properties, and enzyme mimetic activity, making
Yong Yan et al.
Dalton transactions (Cambridge, England : 2003), 42(34), 12179-12184 (2013-07-11)
Poly(allylamine hydrochloride) (PAAH), a mimic of biopolyamines, was used to induce the mineralization of titania at room-temperature, hollow spheres with a mixed phase (anatase and rutile) were obtained, and the fine anatase and rutile nanocrystals were observed mixing at the
Vitaliy Starchenko et al.
The journal of physical chemistry. B, 116(51), 14961-14967 (2012-11-30)
Herein we report on the influence of salt and polyelectrolyte (PEL) concentration, molecular weight, and mixing ratio on the size and size distribution of polyelectrolyte complex (PEC) particles composed of cationic poly(diallyldimethylammonium chloride) and anionic poly(styrene sulfonic acid). The unusual
J Liu et al.
Applied biochemistry and biotechnology, 169(7), 2212-2222 (2013-02-20)
A new immobilization strategy of catalases on natural fibers was reported in this paper. Catalase (CAT) from Bacillus subtilis was assembled into multiple layers together with poly(diallyldimethylammonium chloride) (PDDA) on wool fabrics via layer-by-layer (LBL) electrostatic self-assembly deposition. The mechanism
Lulu Han et al.
Biomaterials, 34(4), 975-984 (2012-11-07)
The directional cell migration plays a crucial role in a variety of physiological and pathological processes. It can be controlled by the gradient cues immobilized on the substrate. The poly(sodium 4-styrenesulfonate) (PSS)/poly(diallyldimethylammonium) chloride (PDADMAC) multilayers were post-treated in a gradient
Fumihiko Kitagawa et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 29(1), 107-112 (2013-01-11)
The preparation of cinchonidine (CCND) nanocrystals and their immobilization onto the inner surface of a fused silica capillary was investigated for use in the enantioseparation by capillary electrochromatography. The CCND nanocrystals were prepared by an emulsion method that utilizes crystal
Tiroyaone Tshukudu et al.
Water environment research : a research publication of the Water Environment Federation, 85(5), 456-465 (2013-06-26)
In this study, two composite coagulants, PFPD1, and PFPD2, were prepared and studied with the inorganic polymer coagulant PFS. A response surface design was used to investigate the effect that changes in the level of coagulant dose and coagulation pH
Lei Pei et al.
Journal of chromatography. A, 1365, 226-233 (2014-09-28)
Polycationic polymers are widely used in capillary electrophoresis (CE) as surface coatings to prevent protein adsorption and control electroosmotic flow (EOF). Such semi-permanent coatings are formed by flushing the capillary with a quaternary amine-based polymer such as poly(diallydimethylammonium chloride) (PDADMAC)
Qishu Qu et al.
Journal of chromatography. A, 1282, 95-101 (2013-02-19)
In this paper, open-tubular capillary column coated with graphene oxide (GO) was prepared through ionic adsorption of negatively charged GO nanosheets onto the capillary wall pre-modified with positively charged poly(diallydimethylammonium chloride) (PDDA). Thus prepared coating was very stable and could
John Crosby et al.
Chemical communications (Cambridge, England), 48(97), 11832-11834 (2012-10-27)
Compartmentalization of the minimal complex of actinorhodin polyketide synthase in coacervate liquid droplets produces enhanced yields of shunt polyketides under conditions of low and high ionic strength.
Urszula Bazylińska et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 47(2), 406-420 (2012-07-17)
There is great clinical interest in developing novel nanocarriers for hydrophobic cyanine dyes used as photosensitizing agents in photodynamic therapy (PDT). In the present study we have employed nanoemulsion-templated oil-core multilayer nanocapsules as robust nanocarriers for a cyanine-type photosensitizer IR-786.
Thomas McNerney et al.
mAbs, 7(2), 413-428 (2015-02-24)
High titer (>10 g/L) monoclonal antibody (mAb) cell culture processes are typically achieved by maintaining high viable cell densities over longer culture durations. A corresponding increase in the solids and sub-micron cellular debris particle levels are also observed. This higher burden
Cédric Amorosi et al.
Colloids and surfaces. B, Biointerfaces, 97, 124-131 (2012-05-23)
Compact and linearly growing polyelectrolyte multilayer films have been used to suppress desorption of drugs, nanoparticles or proteins from underlying polyelectrolyte multilayer films as well as to significantly change their mechanical properties. The polyelectrolyte based capping layers are however cumbersome
Maxim V Kiryukhin et al.
Macromolecular rapid communications, 34(1), 87-93 (2012-11-07)
Patterned arrays of light-responsive microchambers are suggested as candidates for site-specific release of chemicals in small and precisely defined quantities on demand. A composite film is made of poly(allylammonium)-poly(styrene sulfonate) multilayers and gold nanoparticles incorporated between subsequent stacks of polyelectrolytes.
Yuanyuan Han et al.
Macromolecular bioscience, 12(10), 1436-1442 (2012-09-12)
Annealing of PDADMAC/PSS multilayer microcapsules assembled on PSS-doped CaCO(3) particles at 80 °C for 30 min reduces their size dramatically from 6.9 ± 0.3 to 3.1 ± 0.5 µm. Methylene blue molecules are encapsulated by spontaneous deposition and post-annealing with
Xin Zhang et al.
Advanced materials (Deerfield Beach, Fla.), 24(33), 4574-4577 (2012-07-19)
Au-Ag bimetallic core-shell nanoparticles are synthesized in situ in polyelectrolyte multilayers via a sequential ion-exchange/reduction process. The Au-Ag bimetallic nanoparticles show a higher catalytic activity than Au and Ag monometallic ones for the reduction of 4-nitrophenol by NaBH(4) .
Qingnan Meng et al.
Journal of colloid and interface science, 384(1), 22-28 (2012-07-24)
We report here the fabrication of hollow silica particles with mesopores larger than 10nm on their wall via a facile two-step etching method. Different from the conventional template method, the new method uses the silica particles as starting materials, which
Lulu Han et al.
Journal of the Royal Society, Interface, 9(77), 3455-3468 (2012-08-17)
The cell migration plays a crucial role in a variety of physiological and pathological processes and can be regulated by the cell-substrate interactions. We found previously that the poly(sodium 4-styrenesulphonate) (PSS)/poly(diallyldimethylammonium) chloride (PDADMAC) multilayers post-treated in 1-5 M NaCl solutions
Lin Zhou et al.
Journal of chromatography. A, 1251, 169-175 (2012-07-10)
Coated capillary electrophoresis equipped with a boron doped diamond (BDD) electrode was developed for analysis of chemically synthesised 2-heptyl-3-hydroxy-4-quinolone (HHQ), 2-heptyl-3-hydroxy-4-quinolone (PQS), and 2-methyl analogues. Detection was then extended to biological samples. PQS and its biological precursor, HHQ, are two
Jozef Kochan et al.
Water research, 46(16), 5401-5409 (2012-08-14)
Membranes with antibacterial properties were developed using surface modification of polyethersulfone ultrafiltration membranes. Three different modification strategies using polyelectrolyte layer-by-layer (LbL) technique are described. The first strategy relying on the intrinsic antibacterial properties of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(ethylenimine) (PEI)
Maryam Latifian et al.
Environmental technology, 35(17-20), 2289-2295 (2014-08-26)
One of the major setbacks of struvite recovery processes is the difficulty in harvesting struvite crystals. This study evaluates the use of different coagulants to improve precipitation of struvite (MgNH4PO4.6H20) crystals. Chitosan and poly(diallyldimethyl ammonium chloride) (Poly-DADMAC) as a coagulant-flocculent
Pedram Fatehi et al.
Carbohydrate polymers, 92(2), 2103-2110 (2013-02-13)
In this work, the adsorption of lignocelluloses of pre-hydrolysis liquor (PHL) on precipitated calcium carbonate (PCC) was studied in the presence of poly diallyldimethylammonium chloride (PDADMAC) or cationic polyacrylamide (CPAM). The results revealed that adding PCC to PHL and subsequently
Chin-Ping Huang et al.
Chemistry, an Asian journal, 7(12), 2848-2853 (2012-09-27)
An improved method for the synthesis of high-performance and water-soluble quantum dots (QDs) involving the encapsulation of mercaptosuccinic acid coated QDs (MSA-QDs) with poly(diallyldimethylammonium chloride) (PDDA) followed by their direct photoactivation with fluorescent radiation near 295 K to yield PDDA-coated QDs
Mario Tagliazucchi et al.
Advanced materials (Deerfield Beach, Fla.), 24(27), 3617-3621 (2012-06-09)
Diffraction-limited, high-contrast photopatterning of the photoluminescence of layer-by-layer films comprising CdSe@CdS@ZnS quantum dots and polyviologen is reported. The photoluminescence of the quantum dots is initially quantitatively quenched due to ultrafast photoinduced electron transfer to polyviologen. Photopatterning is achieved by high-power
Reine Nehmé et al.
Methods in molecular biology (Clifton, N.J.), 984, 191-206 (2013-02-07)
Capillary electrophoresis (CE) is an interesting technique for protein and peptide analysis. However, one of the major problems concerns sample adsorption on the internal capillary wall. The use of non-covalent coatings using highly charged polyelectrolytes is an efficient, simple, and
M M Ottakam Thotiyl et al.
Journal of colloid and interface science, 383(1), 130-139 (2012-07-20)
Multilayers of poly(diallyldimethylammonium chloride) (PDDA) and citrate capped Au nanoparticles (AuNPs) anchored on sodium 3-mercapto-1-propanesulfonate modified gold electrode by electrostatic layer-by-layer assembly (LbL) technique are shown to be an excellent architecture for the direct electrochemical oxidation of As(III) species. The
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