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71.
Roberto de la Rica Christophe Pejoux Hiroshi Matsui 《Advanced functional materials》2011,21(6):1018-1026
This feature article highlights our recent applications of functional peptide nanotubes, self‐assembled from short peptides with recognition elements, as building blocks to develop sensors. Peptide nanotubes with high aspect ratios are excellent building blocks for a directed assembly into device configurations, and their combined structures with nanometric diameters and micrometric lengths enables to bridge the “nanoworld” and the “microworld”. When the peptide‐nanotube‐based biosensors, which incorporate molecular recognition units, apply alternating current probes to detect impedance signals, the peptide nanotubes behave as excellent building blocks of the transducer for the detection of target analyes such as pathogens, cells, and heavey metal ions with high specificity. In some sensor configurations, the electric signal can be amplified by coupling them with ion‐specific mineralization via molecular recognition of peptides. In general the detection limit of peptide nanotube chips sensors is very low and the dynamic range of detection can be widened by improved device designs. 相似文献
72.
Alexandre Vivet Bessem Ben Doudou Christophe Poilâne Jun Chen M’Hamed Ayachi 《Journal of Materials Science》2011,46(5):1322-1327
This article proposes an alternative way to use carbon nanotubes to improve the performance of carbon fibre-reinforced composites.
A chemical process, based on esterification of surface groups, is used to anchor nanotubes onto carbon fibre surface. Anchored
nanotubes form a network surrounding the carbon fibres. After CNT anchoring, the tow is impregnated with an epoxy resin and
tensile tests are performed on this minicomposite sample. By enhancing matrix properties and fibre/matrix interface, the CNT
network has a significant influence on the composite strength. 相似文献
73.
Xavier Landreau Christelle Dublanche-Tixier Cédric Jaoul Christophe Le Niniven Nicolas Lory Pascal Tristant 《Surface & coatings technology》2011
The effect of surface temperature on the deposition of silicon oxide (SiOx) films with a non-thermal microwave axial injection torch (TIA) was investigated in an open air reactor. Argon was used as plasma gas and hexamethyldisiloxane (Si2O2C6H18) as silicon precursor. The parametric study reported here focuses on the influence of the substrate temperature on the morphological and chemical properties of the films deposited in the interval [0 °C–130 °C]. A similar effect of low and high surface temperature on the deposition process and on the microstructure of the deposited films was highlighted. Macroscopically, particles were promptly produced in the gas phase and incorporated to the film, which generates high surface roughness. Microscopically, FTIR results have shown a high carbon contamination of the deposited films at low and high temperatures, resulting in understoichiometric SiOx films. They have also demonstrated that an optimum growth window for smooth and particle free SiOx was to keep the surface temperature between 30 and 60 °C. Simple reaction mechanisms for powder formation and continuous silicon oxide thin films growth are suggested for each temperature ranges. 相似文献
74.
Pascal Laurent Hary Razafindralambo Bernard Wathelet Christophe Blecker Jean-Paul Wathelet Michel Paquot 《Journal of surfactants and detergents》2011,14(1):51-63
Short chemical syntheses were developed to produce a new set of surfactants from uronic acids derived from widely available
raw materials. Three different strategies were used to synthesize uronic amide derivatives, the structures of which were totally
characterized by spectrometric methods (IR, MS, 1H-RMN and 13C-RMN). The best one, using an acid chloride as the synthetic intermediate, furnished the expected amides as a mixture of
anomers in 46–58% global yield. Surface-active properties (CMC, γcmc, Γmax, A
min) of homologous series of uronic acid N-alkylamides from C8 to C18 were also assessed. In general, these sugar-based surfactants exhibited good surface-activities,
and appeared as valuable nonionic surfactants compared to octylphenol 9–10 ethylene oxide condensate, the most well-known
nonionic surfactant. Increasing the alkyl chain length influenced the CMC values for both glucuronic and galacturonic N-alkylamide derivatives. The galacturonic N-alkylamides decreased γcmc at slower values than their counterpart’s glucuronic N-alkylamides. 相似文献
75.
On the Relation between Morphology and FET Mobility of Poly(3‐alkylthiophene)s at the Polymer/SiO2 and Polymer/Air Interface 下载免费PDF全文
Wibren D. Oosterbaan Jean‐Christophe Bolsée Linjun Wang Veerle Vrindts Laurence J. Lutsen Vincent Lemaur David Beljonne Lars Thomsen Jean V. Manca Dirk J. M. Vanderzande 《Advanced functional materials》2014,24(14):1994-2004
The influence of the interface of the dielectric SiO2 on the performance of bottom‐contact, bottom‐gate poly(3‐alkylthiophene) (P3AT) field‐effect transistors (FETs) is investigated. In particular, the operation of transistors where the active polythiophene layer is directly spin‐coated from chlorobenzene (CB) onto the bare SiO2 dielectric is compared to those where the active layer is first spin‐coated then laminated via a wet transfer process such that the film/air interface of this film contacts the SiO2 surface. While an apparent alkyl side‐chain length dependent mobility is observed for films directly spin‐coated onto the SiO2 dielectric (with mobilities of ≈10?3 cm2 V?1 s?1 or less) for laminated films mobilities of 0.14 ± 0.03 cm2 V?1 s?1 independent of alkyl chain length are recorded. Surface‐sensitive near edge X‐ray absorption fine structure (NEXAFS) spectroscopy measurements indicate a strong out‐of‐plane orientation of the polymer backbone at the original air/film interface while much lower average tilt angles of the polymer backbone are observed at the SiO2/film interface. A comparison with NEXAFS on crystalline P3AT nanofibers, as well as molecular mechanics and electronic structure calculations on ideal P3AT crystals suggest a close to crystalline polymer organization at the P3AT/air interface of films from CB. These results emphasize the negative influence of wrongly oriented polymer on charge carrier mobility and highlight the potential of the polymer/air interface in achieving excellent “out‐of‐plane” orientation and high FET mobilities. 相似文献
76.
Cancer Treatment: Photothermal Killing of Cancer Cells by the Controlled Plasmonic Coupling of Silica‐Coated Au/Fe2O3 Nanoaggregates (Adv. Funct. Mater. 19/2014) 下载免费PDF全文
77.
Tjstil Vlaar Lisa Bensch Jasper Kraakman Christophe M. L. VandeVelde Bert U. W. Maes Romano V. A. Orru Eelco Ruijter 《Advanced Synthesis \u0026amp; Catalysis》2014,356(6):1205-1209
We report the palladium(II)‐catalyzed aerobic oxidative coupling of isocyanides with various (2‐aminophenyl)azoles using air as the stoichiometric oxidant. A diverse range of medicinally valuable azolo[c]quinazolines was obtained by this new approach.
78.
William G. Buttlar Brian C. Hill Y. Richard Kim M. Emin Kutay Anne Millien Antonio Montepara Glaucio H. Paulino Christophe Petit Ion Octavian Pop Elena Romeo Riccardo Roncella Seyed Amirshayan Safavizadeh Gabriele Tebaldi Andrew Wargo 《Materials and Structures》2014,47(8):1373-1390
This paper is the outcome of a specific task group of the RILEM Technical Committee 241-MCD “Mechanisms of Cracking and Debonding in Asphalt and Composite Pavements”. The group on “Advanced Measurement Techniques” was established in 2011 to investigate DIC applications for non-destructive and non-contact measurements of strain fields during laboratory testing. The paper illustrates different DIC/optical flow applications in measuring strain distribution during laboratory testing. Specific applications of DIC for evaluating crack initiation and crack propagation in asphalt materials are presented. 相似文献
79.
80.
AFM Imaging of Molecular Spin‐State Changes through Quantitative Thermomechanical Measurements 下载免费PDF全文