نتایج جستجو برای: sio2 cnt

تعداد نتایج: 18553  

Journal: :Coatings 2023

Carbon nanotubes (CNT) were dispersed into homemade silicone–polyurethane (SPU) resin in order to enhance their mechanical and anticorrosion ability. Before mixing with SPU, CNT modified by four different approaches improve dispersion the surface of covered SiO2–TiO2 nanoparticles, -NH2 groups, epoxy groups or isocyanate respectively. The structures CNTs checked XRD, FTIR, SEM. After being SPU ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده برق و کامپیوتر 1391

هدف از این پژوهش طراحی و ساخت حسگرهای گاز مبتنی برنانولوله های کربنی (cnt) است. با توجه به اینکه تشخیص گاز متان در صنایع کشور اهمیت خاصی دارد بنابراین تمرکز ما برروی ساخت حسگر گاز متان بوده است. حسگرهای اکسید فلز که از رایج ترین حسگرها هستند معمولاً در دماهای بالا (500-300 درجه سانتی گراد) کار می کنند. با توجه به اینکه متان مولکولی پایدار و غیر قطبی است تشخیص آن در دماهای پایین مشکل است. برای تش...

Journal: :InfoMat 2023

Carbon nanotube field-effect transistors (CNT FETs) have been demonstrated to exhibit high performance only through low-temperature fabrication process and require a low thermal budget construct monolithic three-dimensional (M3D) integrated circuits (ICs), which considered promising technology meet the demands of high-bandwidth computing fully functional integration. However, lack high-quality ...

Journal: :journal of nanostructures 2015
a. ghozatloo s. azimi maleki m. shariaty-niassar a. morad rashidi

this article presents an experimental investigation on effects of morphology of nanoparticles on the viscosity nanofluids (nfs). water and ethylene glycol were used as base fluids. a two step method was used for preparation of nfs. sio2 nanoparticles, cnt and graphene nano sheets were dispersed in the base fluids separately with the volume fraction ranging from 0.05% to 1.5%. stability of the n...

2007
Chi Pui Li John D Fitz Gerald Jin Zou Ying Chen

Substitution reactions between multiwalled carbon nanotubes and silicon monoxide vapour have been investigated using transmission electron microscopy. Different reactions occurred inside the multiwalled nanotubes and on the nanotube external surfaces, resulting in the formation of silicon carbide nanowires with a core–shell structure. The substitution reaction process and end products are stron...

2015
S. Baldo V. Scuderi L. Tripodi A. La Magna S. G. Leonardi N. Donato G. Neri S. Filice S. Scalese

In this work we report on the development of back-gated carbon nanotube-field effect transistors (CNT-FETs), with CNT layers playing the role of the channel, and on their electrical characterisation for sensing applications. The CNTs have been deposited by electrophoresis on an interdigitated electrode region created on a SiO2/Si substrate. Different kinds of CNTs have been used (MWCNTs by arc ...

Journal: :Journal of nanoscience and nanotechnology 2015
Juan J Vilatela M E Rabanal Felipe Cervantes-Sodi Máximo García-Ruiz José A Jiménez-Rodríguez Gerd Reiband Mauricio Terrones

We demonstrate a spray pyrolysis method to grow carbon nanotubes (CNTs) with high degree of crystallinity, aspect ratio and degree of alignment on a variety of different substrates, such as conventional steel, carbon fibres (CF) and ceramics. The process consists in the chemical vapour deposition of both a thin SiO2 layer and CNTs that subsequently grow on this thin layer. After CNT growth, inc...

2009
Himanshu Mishra Baratunde A. Cola Vijay Rawat Placidus B. Amama Kalapi G. Biswas Xianfan Xu Timothy S. Fisher Timothy D. Sands

Adv. Mater. 2009, 21, 1–4 2009 WILEY-VCH Verlag Gmb Aminiaturized thermoelectric (TE) coolermodule is composed of a large number of TE legs connected electrically in series and thermally in parallel. TE devices operating near room temperature typically create a temperature difference of 30–50 8C, and the TE film thickness for such devices ranges from 10 to 100mm. From manufacturing and reliabil...

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