نتایج جستجو برای: silicon particles
تعداد نتایج: 233671 فیلتر نتایج به سال:
The three telescopes identify particle energy and type by various techniques. Energy loss and range, which provide the identification of protons (1 to 300 MeV), alpha particles (4 to 1200 MeV) and electrons (1 to 500 MeV), are measured in a stack of silicon solid state detectors and tungsten absorbers in the NE-Range telescope, while the identification of protons (350 to 1000 MeV), alpha partic...
سنتز پلیمرهای کوئوردیناسیونی جدید از لیگاندهای 2-آمینو نیکوتینیک اسید، 2-کینولین کربوکسیلیک اسید، 2-پیرازین کربوکسیلیک اسید در ابعاد توده، با روش گرایان دمایی و با استفاده از شاخه ی جانبی انجام شده است، این پلیمرها توسط روش طیف سنجی ir شناسایی و پایداری گرمایی آن ها توسط تجزیه های وزن سنجی حرارتی (tga) و تجزیه ی گرمایی تفاضلی (dta) بررسی شده است. در ادامه، ساختار این ترکیبات توسط بلورنگاری پرتو...
Product contamination by particles nucleated within the processing environment often limits the deposition rate during chemical vapor deposition processes. A fundamental understanding of how these particles nucleate could allow higher growth rates while minimizing particle contamination. Here we present an extensive chemical kinetic mechanism for silicon hydride cluster formation during silane ...
Long BGO (Bi4Ge3O12) and BSO (Bi4Si3O12) crystals coupled with silicon photodiodes have been used to detect minimumionizing particles(MIP). With a low noise amplifier customized for this purpose, the crystals can detect MIPs with an excellent signalto-noise ratio. The nuclear counter effect is also clearly observed and measured. Effect of full and partial wrapping of a reflector around the crys...
Laser removal of small 1mm sized copper, gold and tungsten particles from silicon wafer surfaces was carried out using ultraviolet radiation at 266 nm generated by Nd:YAG harmonic generation. Successful removal of both copper and gold particles from the surface was achieved whereas tungsten particles proved to be difficult to remove. The cleaning efficiency was increased with an increase of las...
Silicon-based micro- and nanoparticles have gained popularity in a wide range of biomedical applications due to their biocompatibility and biodegradability in vivo, as well as their flexible surface chemistry, which allows drug loading, functionalization and targeting. Here, we report direct in vivo imaging of hyperpolarized (29)Si nuclei in silicon particles by magnetic resonance imaging. Natu...
One key component in the assembly of nanoparticles is their precise positioning to enable the creation of new complex nano-objects. Controlling the nanoscale interactions is crucial for the prediction and understanding of the behaviour of nanoparticles (NPs) during their assembly. In the present work, we have manipulated bare and functionalized gold nanoparticles on flat and patterned silicon a...
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