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排序方式: 共有84条查询结果,搜索用时 15 毫秒
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Marinella M.J. Schroder D.K. Chung G.Y. Loboda M.J. Isaacs-Smith T. Williams J.R. 《Electron Devices, IEEE Transactions on》2008,55(2):565-571
A new method for precisely measuring low gate oxide currents by measuring the charge leaking through the oxide in a pulsed metal oxide semiconductor capacitor (MOS-C) is presented. Using basic equipment, it is possible to measure currents less than 10 fA/cm2 . The relevant theory is developed to use these capacitance-time data to extract an approximate leakage current and the effect on the extracted generation lifetime. The technique is simple and requires the same equipment used for pulsed MOS-C generation lifetime measurements. Experimental results are presented, which are consistent with theory. 相似文献
43.
Melchiorre Masali Marinella Ferrino Monica Argenta Franca Ligabue Stricker 《Personal and Ubiquitous Computing》2011,15(5):491-496
Humans are the product of biologic and cultural adaptation to our Planet achieved over million years of Primates and Hominids
species evolution which has led us to a specific development of intelligence, speech, and manual capability. Interface usability
mainly depends on human characteristics that are also modified by variations in the environment. In outer space, body shapes
may be different, things may not be in the expected place and models of conventional social relationships may be hardly transferred
to prolonged missions. The process known as exaptation, according to which traits developed by a species as a response to a specific need are later “recycled” with new functions
in a different environment, will be considered. Biologic and cultural built-in mechanisms belonging to our past cannot be
left out in the analysis of design and man–machine interface in the Outer Space. 相似文献
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Fabrication of biocompatible monolithic microchannels with high pressure‐resistance using direct polymerization of PEG‐modified PMMA 下载免费PDF全文
Carmela De Marco Caterina Credi Francesco Briatico‐Vangosa Elena Bianchi Ata Tuna Ciftlik Martin Gijs Gabriele Dubini Marinella Levi Stefano Turri 《应用聚合物科学杂志》2014,131(21)
Withstanding high pressures in polymeric microchannels is an important requirement for many biological applications. Here, a simple direct polymerization through a polyester photomask is applied to obtain monolithic polyethylene glycol (PEG)‐modified poly(methyl methacrylate) (PMMA) (PEGMA) microchannels, showing the ability to withstand pressure up to 12 MPa in burst pressure tests. The ability of withstanding high pressures is observed to increase with increasing ratio between the thickness of the cover polymer layer forming the microchannel lid and the width of the microchannel. A simplified finite element modeling model of the burst pressure test is set up to interpret the experimental findings. The outcomes of the modeling activity, along with direct scanning electron microscopy observation of the fracture surfaces, confirm the effectiveness of the polymerization method for the production of monolithic PEGMA microchannels. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 41031. 相似文献
46.
A. Evelyn Di Mauro Vincenzo Villone Chiara Ingrosso Michela Corricelli Lorea Oria Francesc Pérez-Murano Angela Agostiano Marinella Striccoli M. L. Curri 《Journal of Materials Science》2014,49(15):5246-5255
A facile, cost-effective, and general solution-based “bottom-up” method for nanopatterning dense arrays of colloidal Au nanoparticles (NPs) has been developed. The organization of the NPs has been successfully achieved onto a microphase-separated poly(styrene-block-ethylene oxide) (PS-b-PEO) block copolymer (BCP) thin film which acts as structural template. The NP assembly process occurs by incubating the BCP films in dispersions of the ex situ synthesized Au NPs, not requiring any chemical pre-treatment or activation step of the copolymer surface, and has demonstrated to be distinctively controlled by multiple, cooperative, and selective hydrogen bonding interactions between hydroxyl functionalities of the capping molecules coating the Au NP surface and the hydrophilic PEO block. The effect of incubation time and concentration of NPs on the selectivity of the assembly has been investigated by atomic force and scanning electron microscopy. The results show that the BCP pattern is preserved after decoration with the Au NPs. The fabricated nanopatterns are good candidates for nanostructure integration in sensing and optoelectronic applications, as well as in memory devices and photonic systems. Moreover, the proposed immobilization protocol represents a model system that can be extended to other NPs having different compositions and surface chemistries. 相似文献
47.
Carlo I.G. Tuberoso Marinella Melis Alberto Angioni Mario Pala Paolo Cabras 《Food chemistry》2007,101(2):806-811
Hydroalcoholic extracts obtained from myrtle berries of five different selections were studied to obtain unique clones. During the typical 40 day maceration period, dry matter, pH, colour, and anthocyanins, were analyzed. Variability among myrtle selections was observed both in fresh berries (yield berries/plant, weight of the berries, number and weight of seeds per berry) and in the hydroalcoholic extract physical–chemical characteristics (dry matter, colour intensity, tint and anthocyanins). Reversed-phase high performance liquid chromatography (RP-HPLC) analysis with photodiode array detection (PDA) was used for anthocyanins characterization in myrtle hydroalcoholic extracts. Anthocyanin qualitative composition was the same in all selections, but varied strongly in its total amount. D was the selection with the characteristics most suitable for industrial use. 相似文献
48.
Raffaella Suriano Marinella Levi Elisa Emilitri Chiara Momo Stefano Turri 《大分子材料与工程》2011,296(7):666-676
Sealed microchannels and simple microfluidic networks with good efficiency and controlled quality of the structures were developed from a photocurable and PCR‐compatible material based on a PEG–methacrylate oligomers mixture. The influence of UV exposure time and of conversion degree on microchannel geometry were studied to obtain structures with controlled depth, vertical sidewalls, and good reproducibility. The roughness inside channels was as low as 50–100 nm, less than that typical of alternative LOC prototyping techniques such as micromilling. Efficient channel sealing was also achieved without using a different sealing material. Surface smoothness and hydrophilicity (static contact angle below 60°) allow spontaneous water flow inside the channels by capillarity without need of surface treatments.
49.
Guy Koplovitz Gregory Leitus Supriya Ghosh Brian P. Bloom Shira Yochelis Dvir Rotem Fabio Vischio Marinella Striccoli Elisabetta Fanizza Ron Naaman David H. Waldeck Danny Porath Yossi Paltiel 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(1)
The rapid growth in demand for data and the emerging applications of Big Data require the increase of memory capacity. Magnetic memory devices are among the leading technologies for meeting this demand; however, they rely on the use of ferromagnets that creates size reduction limitations and poses complex materials requirements. Usually magnetic memory sizes are limited to 30–50 nm. Reducing the size even further, to the ≈10–20 nm scale, destabilizes the magnetization and its magnetic orientation becomes susceptible to thermal fluctuations and stray magnetic fields. In the present work, it is shown that 10 nm single domain ferromagnetism can be achieved. Using asymmetric adsorption of chiral molecules, superparamagnetic iron oxide nanoparticles become ferromagnetic with an average coercive field of ≈80 Oe. The asymmetric adsorption of molecules stabilizes the magnetization direction at room temperature and the orientation is found to depend on the handedness of the chiral molecules. These studies point to a novel method for the miniaturization of ferromagnets (down to ≈10 nm) using established synthetic protocols. 相似文献
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