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You searched for: Journal RSC advances Remove constraint Journal: RSC advances Publication Year 2013 Remove constraint Publication Year: 2013 Source 2013 v.4 no.9 Remove constraint Source: 2013 v.4 no.9
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1. Atomistic view of thin Ni/Ni₃Al (0 0 1) under uniaxial tension of twist grain boundaries

Author:
Liu, Chengyan; Wang, Fei; Yuan, Pengfei; Guo, Zhengxiao; Yu, Jingui; Jia, Yu
Source:
RSC advances 2013 v.4 no.9 pp. 4552-4557
ISSN:
2046-2069
Subject:
microstructure; molecular dynamics; nickel; plastic deformation
Abstract:
... Atomic motion and the structure response of grain boundaries (GBs) are essential to the plastic deformation of small-volume polycrystal systems, especially for thin materials that exhibit some dramatic characteristics. Here, the microstructure and properties of thin Ni/Ni₃Al (0 0 1) with the uniaxial tension of twist GBs are investigated using molecular dynamics (MD) simulations with an embedded a ...
DOI:
10.1039/c3ra45393f

2. Dramatically improved dielectric properties of polymer composites by controlling the alignment of carbon nanotubes in matrix

Author:
Ning, Nanying; Bai, Xue; Yang, Dan; Zhang, Liqun; Lu, Yonglai; Nishi, Toshio; Tian, Ming
Source:
RSC advances 2013 v.4 no.9 pp. 4543-4551
ISSN:
2046-2069
Subject:
alcohols; carbon nanotubes; composite films; composite materials; dielectric properties; energy density; microstructure; polyvinyl alcohol
Abstract:
... Aligned multi-walled carbon nanotubes (MWCNTs)/polyvinyl alcohol composite films were prepared by using an easy and controllable electrospinning-in situ film-forming (EF) technique. A high dielectric constant (k), a low dielectric loss, a consistently high breakdown strength, and a high energy density were obtained by using this technique. The dramatically improved dielectric properties are ascrib ...
DOI:
10.1039/c3ra45769a

3. Evolution of electrochemical interfaces in solid oxide fuel cells (SOFC): a Ni and Zr resonant anomalous ultra-small-angle X-ray scattering study with elemental and spatial resolution across the cell assembly

Author:
Allen, Andrew J.; Ilavsky, Jan; Jemian, Pete R.; Braun, Artur
Source:
RSC advances 2013 v.4 no.9 pp. 4676-4690
ISSN:
2046-2069
Subject:
X-radiation; X-ray scattering; anodes; batteries; cathodes; durability; electric power; electrochemistry; electrolytes; energy conversion; fuel cells; fuels; microstructure; nickel; oxides; sulfur; temperature; zirconium
Abstract:
... Electrochemical interfaces are key to the direct conversion of fuels to electrical energy and lend energy converters like solid oxide fuel cells (SOFC) their functionality. Over extended operation at high temperatures, the microstructure of the underlying component materials in the cathodes, anodes and electrolytes evolve to an extent that these interfaces become affected and ultimately impaired, ...
DOI:
10.1039/c3ra46886k

4. Facile one-step room-temperature synthesis of Mn-based spinel nanoparticles for electro-catalytic oxygen reduction

Author:
Liu, Youlin; Wang, Yingxia; Xu, Xueyan; Sun, Pingchuan; Chen, Tiehong
Source:
RSC advances 2013 v.4 no.9 pp. 4727-4731
ISSN:
2046-2069
Subject:
ambient temperature; cadmium; catalysts; catalytic activity; chemical reduction; cobalt; crystallization; electrochemistry; nanocrystals; nanoparticles; oxygen; zinc
Abstract:
... A facile one-step method to synthesize nanocrystalline Mn-based spinels AMn₂O₄ (A = Co, Zn, Cd) at room temperature was reported. The obtained well crystallized CoMn₂O₄ spinel nanoparticles exhibited high catalytic activity for ORR in alkaline media as electrocatalysts. ...
DOI:
10.1039/c3ra47065b

5. From (+)-epigallocatechin gallate to a simplified synthetic analogue as a cytoadherence inhibitor for P. falciparum

Author:
Gemma, Sandra; Brogi, Simone; Patil, Pradeep R.; Giovani, Simone; Lamponi, Stefania; Cappelli, Andrea; Novellino, Ettore; Brown, Alan; Higgins, Matthew K.; Mustafa, Khairul; Szestak, Tadge; Craig, Alister G.; Campiani, Giuseppe; Butini, Stefania; Brindisi, Margherita
Source:
RSC advances 2013 v.4 no.9 pp. 4769-4781
ISSN:
2046-2069
Subject:
Plasmodium falciparum; binding sites; cell adhesion; cerebral malaria; endothelium; erythrocytes; intercellular adhesion molecule-1; molecular models; parasites; prototypes; receptors; surface antigens; virulence
Abstract:
... Parasite derived surface antigen PfEMP1 is a virulence factor of the human malaria parasite. PfEMP1 variants have been implicated in the cytoadherence of P. falciparum infected erythrocytes (iRBC) to several binding receptors on host vascular endothelium. Among them, binding to ICAM-1 seems to be related to severe manifestations of the disease such as cerebral malaria. The binding site for iRBC ha ...
DOI:
10.1039/c3ra45933k

6. General synthesis of LiLn(MO₄)₂:Eu³⁺ (Ln = La, Eu, Gd, Y; M = W, Mo) nanophosphors for near UV-type LEDs

Author:
Liu, Ying; Wang, Yu; Wang, Liping; Gu, Ying-Ying; Yu, Shu-Hui; Lu, Zhou-Guang; Sun, Rong
Source:
RSC advances 2013 v.4 no.9 pp. 4754-4762
ISSN:
2046-2069
Subject:
ambient temperature; citric acid; crystallization; emissions factor; esterification; ethylene glycol; gels; ligands; molybdates; molybdenum; nanoparticles; thermal degradation; thermogravimetry; wavelengths; white light
Abstract:
... A series of Eu³⁺-doped double tungstate and molybdate red phosphors, LiLn(MO₄)₂:Eu³⁺ (Ln = La, Eu, Gd, Y; M = W, Mo), have been successfully synthesized by a simple Pechini method. The procedure involves formation of homogeneous, and transparent, metal–citrate gel precursors using citric acid as a chelating ligand to form metal complexes and ethylene glycol as a cross-linker for polyesterification ...
DOI:
10.1039/c3ra46224b

7. Halide ion induced tuning and self-organization of gold nanostars

Author:
Kedia, Abhitosh; Kumar, P. Senthil
Source:
RSC advances 2013 v.4 no.9 pp. 4782-4790
ISSN:
2046-2069
Subject:
adsorption; anisotropy; metal ions; nanogold; optical properties; reaction kinetics; surface plasmon resonance
Abstract:
... The simple addition of different halide ions to the precursor polymer–solvent solution for the synthesis of gold nanostars drastically changes their optical properties owing to the blue/red shifting of the longitudinal surface plasmon resonance (LSPR) bands as well as the emergence of new plasmon bands, aesthetically illustrating the simultaneous size/shape tuning enhanced with intriguing self org ...
DOI:
10.1039/c3ra43976c

8. Halide substitution in Ca(BH₄)₂

Author:
Grove, Hilde; Rude, Line H.; Jensen, Torben R.; Corno, Marta; Ugliengo, Piero; Baricco, Marcello; Sørby, Magnus H.; Hauback, Bjørn C.
Source:
RSC advances 2013 v.4 no.9 pp. 4736-4742
ISSN:
2046-2069
Subject:
X-ray diffraction; borohydrides; bromides; calcium chloride; fluorides; milling; solid solutions; temperature
Abstract:
... Halide substitution in Ca(BH₄)₂ has been investigated in ball milled mixtures of Ca(BH₄)₂ and CaX₂ (X = F, Cl, Br) with different molar ratios. In situ synchrotron radiation powder X-ray diffraction measurements of Ca(BH₄)₂ + CaCl₂ with 1 : 0.5, 1 : 1 and 1 : 2 molar ratios reveal that no substitution of Cl⁻ for BH₄⁻ occurs from the ball milling process. However, substitution readily occurs after ...
DOI:
10.1039/c3ra46226a

9. Improvement in the catalytic activity of cytochrome c by immobilisation on a novel mesoporous silica sheet

Author:
Nakanishi, Kazuma; Tomita, Masahiro; Kato, Katsuya
Source:
RSC advances 2013 v.4 no.9 pp. 4732-4735
ISSN:
2046-2069
Subject:
catalytic activity; cytochrome c; porous media; silica; surfactants
Abstract:
... Here, we introduce a new synthetic approach to mesoporous silica (MPS) sheets (thickness ≤ 100 nm). By using the carboxylate surfactant (N-palmitoyl-l-alanine) and Pluronic P123 as dual-templating agents, an MPS sheet was synthesised under similar conditions to SBA-15. Cytochrome c immobilised on an MPS sheet showed extremely high relative activity. ...
DOI:
10.1039/c3ra45861j

10. In situ synthesis of metal/polymer nanocomposite thin films on glass substrates by using highly cross-linked polymer matrices with tailorable ion exchange capabilities

Author:
Toda, Isao; Tsuruoka, Takaaki; Matsui, Jun; Murashima, Takashi; Nawafune, Hidemi; Akamatsu, Kensuke
Source:
RSC advances 2013 v.4 no.9 pp. 4723-4726
ISSN:
2046-2069
Subject:
copper; copper nanoparticles; crosslinking; films (materials); glass; ion exchange; magnetic properties; metal ions; nickel; polymer nanocomposites; polymers
Abstract:
... We describe the use of ion-exchangeable, highly cross-linked polymer films as a matrix for the synthesis of nanocomposite thin films and patterns with embedded Cu and Ni nanoparticles. We have successfully controlled the size of metal nanoparticles and thus optical and magnetic properties of the films by varying the initial amount of doped metal ions. ...
DOI:
10.1039/c3ra46166a

11. LDA-promoted asymmetric synthesis of β-trifluoromethyl-β-amino indanone derivatives with virtually complete stereochemical outcome

Author:
Xie, Chen; Mei, Haibo; Wu, Lingmin; Soloshonok, Vadim A.; Han, Jianlin; Pan, Yi
Source:
RSC advances 2013 v.4 no.9 pp. 4763-4768
ISSN:
2046-2069
Subject:
catalytic activity; indans; stereochemistry; stereoselective synthesis
Abstract:
... We demonstrate that reactions between various 1-indanones and (SS)-N-tert-butanesulfinyl-(3,3,3)-trifluoroacetaldimine, conducted in the presence of catalytic amounts of LDA, occur with virtually complete stereochemical outcome, offering reliable and generalized access to biologically relevant β-trifluoromethyl-β-amino indanone derivatives. The products can be isolated in diastereomerically pure f ...
DOI:
10.1039/c3ra45773g

12. Magnetic nanoparticles incorporated on functionalized mesoporous silica: an advanced electrochemical sensor for simultaneous determination of amiodarone and atenolol

Author:
Hasanzadeh, Mohammad; Pournaghi-Azar, Mohammad Hossein; Shadjou, Nasrin; Jouyban, Abolghasem
Source:
RSC advances 2013 v.4 no.9 pp. 4710-4717
ISSN:
2046-2069
Subject:
adsorption; aqueous solutions; carbon electrodes; drugs; ferric oxide; magnetism; moieties; nanoparticles; pH; porous media; sensors (equipment); silica
Abstract:
... A new chemically modified carbon paste electrode is constructed based on magnetic (Fe₂O₃) mobile crystalline material-41 grafted with 3-aminopropyl groups (MCM-41–nPrNH₂), a kind of mesoporous silica with large surface area (362 m² g⁻¹). For the first time, the electrode was evaluated as an electrochemical sensor for simultaneous determination of amiodarone and atenolol in aqueous solutions. The m ...
DOI:
10.1039/c3ra45433a

13. Microfluidic laboratories for C. elegans enhance fundamental studies in biology

Author:
Bakhtina, Natalia A.; Korvink, Jan G.
Source:
RSC advances 2013 v.4 no.9 pp. 4691-4709
ISSN:
2046-2069
Subject:
Caenorhabditis elegans; cost effectiveness; electronics; photonics
Abstract:
... The in vivo analysis of a small multicellular organism such as the nematode Caenorhabditis elegans, enables fundamental biomedical and environmental studies of a complete organism under normal physiological conditions. Continuous advancements in photonics, electronics, as well as the material sciences, are paving the way towards miniaturized bioanalytical systems, known as labs-on-a-chip (LOC). Th ...
DOI:
10.1039/c3ra43758b

14. One-pot tandem synthesis of 2,3-unsubstituted indoles, an improved Leimgruber–Batchoindole synthesis

Author:
Chen, Jinchun; Zhang, Zhikai; Liu, Sujing; Yang, Cuiyun; Xia, Chuanhai
Source:
RSC advances 2013 v.4 no.9 pp. 4672-4675
ISSN:
2046-2069
Subject:
chemical residues; dimethylformamide; indoles
Abstract:
... A concise, fast and efficient one-pot methodology has been developed for preparing 2,3-unsubstituted indoles from 2-nitrotoluenes and dimethylformamide dimethyl acetal. Compared with the classical Leimgruber–Batcho reaction, such a one-pot process simplified the operation procedures, generated less by-products and chemical residues, and resulted in higher overall yields in a shorter reaction time. ...
DOI:
10.1039/c3ra45548c

15. Replacing the metal oxide layer with a polymer surface modifier for high-performance inverted polymer solar cells

Author:
Lee, Tack Ho; Choi, Hyosung; Walker, Bright; Kim, Taehyo; Kim, Hak-Beom; Kim, Jin Young
Source:
RSC advances 2013 v.4 no.9 pp. 4791-4795
ISSN:
2046-2069
Subject:
absorption; cathodes; electron transfer; polymers; solar cells; wettability; zinc oxide
Abstract:
... Replacing ZnO with PEIE, both as a surface modifier for the low work function electrode and as an electron selective layer, enhances the performance and air stability of inverted polymer solar cells by improving electron transport, wettability between the active layer and the cathode, and maximizing light absorption within the active layer without light interference. ...
DOI:
10.1039/c3ra46180g

16. Synthesis and properties of 1,3,4-oxadiazole-containing bismaleimides with asymmetric structure and the copolymerized systems thereof with 4,4′-bismaleimidodiphenylmethane

Author:
Xia, Lianlian; Zhai, Xuejiao; Xiong, Xuhai; Chen, Ping
Source:
RSC advances 2013 v.4 no.9 pp. 4646-4655
ISSN:
2046-2069
Subject:
body mass index; chemical structure; glass; resins; solubility; thermal stability; thermogravimetry
Abstract:
... Two novel bismaleimide monomers containing 1,3,4-oxadiazole and asymmetric structure, i.e., 2-[4-(4-maleimidophenoxy)phenyl]-5-(4-maleimidophenyl)-1,3,4-oxadiazole (p-Mioxd) and 2-[3-(4-maleimidophenoxy)phenyl]-5-(4-maleimidophenyl)-1,3,4-oxadiazole (m-Mioxd), were designed and synthesized. The chemical structures of the monomers were confirmed using Fourier transform infrared spectroscopy (FTIR), ...
DOI:
10.1039/c3ra45313h

17. The controlled fabrication of “Tip-On-Tip” TERS probes

Author:
Yang, Yong; Li, Zhi-Yuan; Nogami, Masayuki; Tanemura, Masaki; Huang, Zhengren
Source:
RSC advances 2013 v.4 no.9 pp. 4718-4722
ISSN:
2046-2069
Subject:
Raman spectroscopy; electromagnetic field; geometry; nanosilver; scanning probe microscopy
Abstract:
... Tip-enhanced near-field Raman spectroscopy has exhibited a great ability to detect in situ chemical and structural information on a sample surface with the highest lateral resolution combined with a high sensitivity at the same time. A key challenge in the TERS field is the development and improvement of the fabrication of reproducible metal tip geometries with a sharper apex. In this study, one n ...
DOI:
10.1039/c3ra44532a

18. An amino acid-based swift synthesis of zinc oxide nanostructures

Author:
Subramanian, Navaladian; Al Ghaferi, Amal
Source:
RSC advances 2013 v.4 no.9 pp. 4371-4378
ISSN:
2046-2069
Subject:
X-ray diffraction; acetates; ambient temperature; heat; lysine; nanorods; nitrates; zinc; zinc oxide
Abstract:
... Zinc oxide (ZnO) nanostructures (rods, ellipsoids and flowers) were synthesized using a zinc precursor and l-lysine in aqueous medium at room temperature and/or at elevated temperature. The average thicknesses of different zinc oxide nanorods samples synthesized by this eco-friendly route are in the range of 109 to 291 nm. The synthesized ZnO samples were characterized using X-ray diffraction (XRD ...
DOI:
10.1039/c3ra45914d

19. Base stable quaternary ammonium ionic liquids

Author:
Lethesh, Kallidanthiyil Chellappan; Dehaen, Wim; Binnemans, Koen
Source:
RSC advances 2013 v.4 no.9 pp. 4472-4477
ISSN:
2046-2069
Subject:
acetates; ambient temperature; ammonium; anions; chlorides; formates; ionic liquids; nitrates; propionic acid; quaternary ammonium compounds; sulfates; sulfonates; viscosity
Abstract:
... Ionic liquids with the bis(2-ethylhexyl)dimethylammonium cation, [BEDMA]⁺, were prepared by a halide-free route starting from the readily available secondary amine bis(2-ethylhexyl)amine. The following anions were considered: chloride, bromide, iodide, nitrate, hydrogensulphate, dihydrogenphosphate, formate, acetate, propionate, trifluoroacetate, methyl sulphate, methanesulphonate, tosylate, isoni ...
DOI:
10.1039/c3ra45126g

20. Cascade reactions of glycine Schiff bases and chiral phase transfer catalysts in the synthesis of α-amino acids 3-substituted phthalides or isoindolinones

Author:
Perillo, Milena; Di Mola, Antonia; Filosa, Rosanna; Palombi, Laura; Massa, Antonio
Source:
RSC advances 2013 v.4 no.9 pp. 4239-4246
ISSN:
2046-2069
Subject:
amino acids; benzaldehyde; catalysts; cyclization reactions; enantioselectivity; esters; phthalides; schiff bases; screening
Abstract:
... The tuning of aldol/cyclization cascade reactions of glycine Schiff bases with 2-cyano benzaldehydes provides access to non-natural α-amino acid derivatives substituted alternatively with phthalides or isoindolinones, depending on the strength of the used base. Moreover, a preliminary screening of catalysts and conditions for development of asymmetric versions identified chiral bifunctional phase ...
DOI:
10.1039/c3ra46268d