نتایج جستجو برای: chemical vapor synthesis

تعداد نتایج: 786932  

Journal: :Nanotechnology 2011
Robin John A Ashokreddy C Vijayan T Pradeep

Increasing interest in graphene research in basic sciences and applications emphasizes the need for an economical means of synthesizing it. We report a method for the synthesis of graphene on commercially available stainless steel foils using direct thermal chemical vapor deposition. Our method of synthesis and the use of relatively cheap precursors such as ethanol (CH(3)CH(2)OH) as a source of...

2008
Kishore Uppireddi Oscar Resto Brad R Weiner Gerardo Morell

Iron nanoparticles were employed to induce the synthesis of diamond on molybdenum, silicon, and quartz substrates. Diamond films were grown using conventional conditions for diamond synthesis by hot filament chemical vapor deposition, except that dispersed iron oxide nanoparticles replaced the seeding. X-ray diffraction, visible, and ultraviolet Raman Spectroscopy, energy-filtered transmission ...

2017
Anqi Zhang Gengfeng Zheng

540 MRS BULLETIN • VOLUME 42 • JULY 2017 • www.mrs.org/bulletin T book thoroughly reviews all aspects of quasi-one-dimensional nanostructures, such as nanowires (NWs), from their synthesis methods to their properties and applications. The fi rst chapter explains the importance of studying NWs, the physical concepts related to their formation, and some historical results on their synthesis. Chap...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور استان مازندران - دانشکده علوم پایه 1391

پژوهشگران بسیاری در خصوص نانو بلورک های نیکلی و اکسید نیکلی کار کرده اند که دلیل انتخاب آن به کاربردهای آن ها در قطعه های الکتریکی، خازن ها، حسگرها، مواد مغناطیسی، کامپوزیت ها، کاتالیزور ها و تهیه ی فلز مناسب بر می گردد. در کار حاضر تلاشی شده است تا به کمک روش ساده ی سل – ژل که یک روش از پایین به بالا است و حتی در دمای اتاق قابلیت به کارگیری دارد نانو ذره های نیکلی و اکسید نیکلی را سنتز کنیم. د...

2009
Magdalena Swierczewska Irene Rusakova Balaji Sitharaman

The inner transition metals, gadolinium (Gd) and europium (Eu) have been shown to catalyze the growth of single-walled carbon nanotubes (SWCNTs) using chemical vapor deposition. The Gd and Eu nanocatalysts, prepared using a diblock copolymer templating method and characterized by atomic force microscopy, were uniformly spaced over a large deposition area with an average diameter of 1.9 nm and n...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده فنی 1386

چکیده ندارد.

2014
Chang-Ho Choi Brian K. Paul Chih-Hung Chang

State-of-the-art techniques for the fabrication of compound semiconductors are mostly vacuum-based physical vapor or chemical vapor deposition processes. These vacuum-based techniques typically operate at high temperatures and normally require higher capital costs. Solution-based techniques offer opportunities to fabricate compound semiconductors at lower temperatures and lower capital costs. A...

2017
Jie Sun Xuejian Li Weiling Guo Miao Zhao Xing Fan Yibo Dong Chen Xu Jun Deng Yifeng Fu

Molybdenum disulfide (MoS2) is one of the most important two-dimensional materials after graphene. Monolayer MoS2 has a direct bandgap (1.9 eV) and is potentially suitable for post-silicon electronics. Among all atomically thin semiconductors, MoS2’s synthesis techniques are more developed. Here, we review the recent developments in the synthesis of hexagonal MoS2, where they are categorized in...

2012
Priyanka PERIWAL

Si/Si1-xGex Heterostructured nanowires are grown by Reduced Pressure-Chemical Vapor Deposition (RP-CVD) using catalyst assisted Vapor Liquid Solid (VLS) and Vapor Solid Solid (VSS) method. We aim to obtain compositional (Si/Si1xGex) and/or doped (p-i-n) heterostructures with abrupt interfaces. The resulting NW heterostructures are structurally characterized using e.g. transmission electron micr...

2009
S. M. Kang

The synthesis of wurtzite gallium nitride (GaN) nanorods with triangular shape on c-Al2O3 substrates using a thermal chemical vapor deposition process was investigated. It was possible to control nanorod shape and growth mode of GaN nanorods by change of sample geometry in the chamber using a mixture of GaN powder and Ga metal with ammonia gas reaction. It was found that the GaN nanorods were g...

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