排序方式: 共有47条查询结果,搜索用时 15 毫秒
1.
A Paccapelo C Piana F Rychlicki MA Recchioni U Salvolini A Ducati M Bonsignori 《Canadian Metallurgical Quarterly》1998,84(5):529-533
The etiology of seizures associated with cocaine use is unclear. Because cocaine seizures are relatively uncommon, they should be diagnosed by exclusion and a neurological workup to rule out central nervous system (CNS) catastrophe should be made. This report describes the clinical findings, treatment, and blood cocaine and metabolite concentrations in a patient who, on two separate occasions, had seizures associated with crack cocaine ingestion. Approximately 1 hour after the ingestion incidents, the patient had multiple, generalized seizures that abated spontaneously. His workup for CNS bleeding, infection, and trauma was negative. Cocaine concentrations on the first incident peaked at 2.48 mg/L and on the second incident peaked at 3.9 mg/L. Other clinical findings included tachycardia, hypertension, diaphoresis, and disorientation. Blood cocaine and metabolite analysis revealed extremely high concentrations. Other than the incident of seizures and transient cardiovascular aberrations, these high concentrations were tolerated by the patient without further sequelae. A review of cocaine-induced seizures and treatment is included. 相似文献
2.
Darton NJ Sederman AJ Ionescu A Ducati C Darton RC Gladden LF Slater NK 《Nanotechnology》2008,19(39):395102
The use of magnetic fields in magnetic resonance imaging (MRI) for the tracking and delivery of chemotherapeutics bound to superparamagnetic nanoparticles offers a promising method for the non-invasive treatment of inoperable tumours. Here we demonstrate that superparamagnetic magnetite nanoparticles fabricated by an easily scalable method can be driven and tracked in real time at high velocities in vitro using MRI hardware. Force balance calculations are consistent with the magnetic properties of individual 10 nm diameter particles that move collectively as micron sized agglomerates with hydrodynamic diameter similar to that inferred from zero-magnetic-field dynamic light scattering measurements. 相似文献
3.
Li‐S‐Batteries: Advanced Lithium–Sulfur Batteries Enabled by a Bio‐Inspired Polysulfide Adsorptive Brush (Adv. Funct. Mater. 46/2016) 下载免费PDF全文
4.
Hofmann S Sharma R Ducati C Du G Mattevi C Cepek C Cantoro M Pisana S Parvez A Cervantes-Sodi F Ferrari AC Dunin-Borkowski R Lizzit S Petaccia L Goldoni A Robertson J 《Nano letters》2007,7(3):602-608
We present atomic-scale, video-rate environmental transmission electron microscopy and in situ time-resolved X-ray photoelectron spectroscopy of surface-bound catalytic chemical vapor deposition of single-walled carbon nanotubes and nanofibers. We observe that transition metal catalyst nanoparticles on SiOx support show crystalline lattice fringe contrast and high deformability before and during nanotube formation. A single-walled carbon nanotube nucleates by lift-off of a carbon cap. Cap stabilization and nanotube growth involve the dynamic reshaping of the catalyst nanocrystal itself. For a carbon nanofiber, the graphene layer stacking is determined by the successive elongation and contraction of the catalyst nanoparticle at its tip. 相似文献
5.
We demonstrate the deterministic shape-selective synthesis and growth of CdSe nanowires, nanosaws and nanoribbons by a simple vapour-transport process in a tube furnace. The key step, in order to achieve reproducible shape selectivity for a given set of deposition parameters, is to exclude any effects of the temperature ramping. We prove that an efficient precursor-flow shutter is achieved just by varying the total furnace pressure. We then present a shape-diagram linking the different nanocrystals morphologies to only two parameters: powder and substrate temperature. These are varied in the 550-700?°C and 400-600?°C range, respectively. A model explaining the shape control is discussed. 相似文献
6.
Wegner K Vinati S Piseri P Antonini A Zelioli A Barborini E Ducati C Milani P 《Nanotechnology》2012,23(18):185603
The fabrication of functional thin films and devices by direct deposition of nanoparticles from the gas phase is a promising approach enabling, for instance, the integration of complex analytical and sensing capabilities on microfabricated platforms. Aerosol-based techniques ensure large-scale nanoparticle production and they are potentially suited for this goal. However, they are not adequate in terms of fine control over the lateral resolution of the coatings, mild processing conditions (avoiding high temperature and aggressive chemicals), low contamination and compatibility with microfabrication processes. Here we report the high-rate and efficient production of functional nanostructured films by nanoparticle assembling obtained by the combination of flame spray pyrolysis and supersonic expansion. Our approach merges the advantages of flame spray pyrolysis for bulk nanopowders such as process stability and wide material library availability with those of supersonic cluster beam deposition in terms of lateral resolution and of direct integration of nanomaterials on devices. We efficiently produced nanostructured films and devices (such as gas sensors) using metal oxide, pure noble metal and oxide-supported noble metal nanoparticles. 相似文献
7.
We demonstrate the assembly of functional hybrid nanopores for single molecule sensing by inserting DNA origami structures into solid-state nanopores. In our experiments, single artificial nanopores based on DNA origami are repeatedly inserted in and ejected from solid-state nanopores with diameters around 15 nm. We show that these hybrid nanopores can be employed for the detection of λ-DNA molecules. Our approach paves the way for future development of adaptable single-molecule nanopore sensors based on the combination of solid-state nanopores and DNA self-assembly. 相似文献
8.
Flavio Della Foglia Gian Luca Chiarello Maria Vittoria Dozzi Paolo Piseri Luca Giacomo Bettini Simone Vinati Caterina Ducati Paolo Milani Elena Selli 《International Journal of Hydrogen Energy》2014
Photoactive membranes coated with TiO2 and Pt/TiO2 nanostructured thin films were produced by one-step deposition of gas phase nanoparticles on glass fiber filters. Pt/TiO2 nanoparticles (0–1.5 wt.% Pt content) were produced by flame spray pyrolysis, starting from liquid solutions of the Ti and Pt precursors, and then expanded in a supersonic beam to be deposited on the filters. The nanostructured coatings were composed of crystalline nanoparticles (mainly anatase phase), without any need of post-deposition annealing. The so obtained photocatalytic membranes were tested in hydrogen production by photo-steam reforming of ethanol in an expressly set-up diffusive photoreactor. The reaction rate was found to increase with increasing the Pt content in the photoactive material, up to 1.5 wt.% Pt. The use of these membranes allowed a significant increase of the hydrogen production rate compared to that obtained with the same photoactive Pt/TiO2 films deposited on a quartz substrate. 相似文献
9.
Highly Efficient Perovskite Nanocrystal Light‐Emitting Diodes Enabled by a Universal Crosslinking Method 下载免费PDF全文
10.
G. Bongiorno A. Podestà L. Ravagnan P. Piseri P. Milani C. Lenardi S. Miglio M. Bruzzi C. Ducati 《Journal of Materials Science: Materials in Electronics》2006,17(6):427-441
Nanostructured carbon thin films can be grown by deposition of cluster beams produced in supersonic expansions. By using a
pulsed microplasma cluster source and by exploiting aerodynamic focusing effects typical of supersonic expansions, the structure
and the properties of the films can be controlled by varying the cluster mass distribution prior to deposition. Nanocomposite
films can be produced by co-depositing carbon clusters and metallic nanoparticles.
The films have been characterized by various spectroscopic techniques and tested in view of applications for field emission,
supercapacitors, gas sensing. The possibility of patterning cluster-assembled carbon films by shadow masking or by ultraviolet
photon irradiation suggests interesting perspective for the integration of nanostructured carbon films on microfabricated
devices and for the production of components for an all-carbon electronics. 相似文献