دانشکده علوم و فناوریهای نوین گروه مهندسی نانوفناوری

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دانشکده علوم و فناوریهای نوین گروه مهندسی نانوفناوری روش های سنتز نانومواد مدرس: بهروز موحدی

تعريف علم نانو مواد تعريف نانو فناوری مطالعه پدیده ها و دستکاری مواد در مقیاس اتمی و مولکولی که در این مقیاس کوچک خصوصیات مواد با ویژگی هایشان در مقیاس بزرگ متفاوت است. تعريف نانو فناوری طراحی، شناسایی، توليد و کاربرد ساختارها، طرحها و سامانه ها با استفاده از کنترل شکل و اندازه مواد در مقیاس نانو.

تقسیم بندی نانو مواد نانو مواد صفر بعدی (نانو ذرات فلزی و یا سرامیکی) نانو مواد یک بعدی (نانو لوله ها، فیبرها، نانو میله ها...) نانو مواد دو بعدی (لایه های نازک با ضخامت کمتر از 100 نانومتر) نانو مواد سه بعدی (مواد نانو کریستال، نانو کامپوزيت های زمینه فلزی، سرامیکی و پلیمری) R.W. Siegel, Nanophase Materials, Encyclopedia of Applied Physics, VCH Publishers 1994

نانو مواد: نانو پودرها/ نانوذراتNano powders/ Nano particles نسبت سطح به حجم بالا تغيير خواص فيزيکي و شيميايي (خواص اپتيکي، الکتريکي، کاتاليزوري و ....) نانو تيوب ها و نانو ميله هاNano tubes & Nano rods استحکام و انعطاف پذيري بسيار بالا خواص الکترونيکي ويژه مواد نانو ساختار:Nano structured materials

خواص متفاوت و اغلب بسيار برتر نانو مواد در مقايسه با مواد متعارف افزايش استحکام و سختي افزايش انعطاف پذيري و شکل پذيري (سوپر پلاستيسيته) افزايش حد حلاليت عناصري آلياژي افزايش سرعت نفوذ افزايش واکنش پذيري شيميايي امكان كنترل خواص ذاتي ماده بدون تغيير در تركيب شيميايي ...

روشهاي توليد و ساخت نانو مواد دنياي ماكرو دنياي اتمي Bottom Up تركيب و دركنار هم قرار دادن مواد براي رسيدن به محصول مورد نظر Top Down كاهش ابعاد تا رسيدن به محصول مورد نظر دنيايي در مقياس نانو

Two approaches to the synthesis of Nanoparticles. روشهاي توليد و ساخت نانو مواد Two approaches to the synthesis of Nanoparticles. A comparison of Nanochemistry and Nanophysic.

روشهاي توليد و ساخت نانو مواد (روش های شيميايي) روش های آبی (Aqueous Methods) روش های غير آبی (Non-aqueous Methods) روش های سونوشيمی (Sono-chemical Methods) روش های اورگانومتاليک (Organo-metallic Methods) روش های رسوب الکتروشيميايی (Electro-deposition Methods) روش های رسوب از محلول (Solution Deposition) روش های سل- ژل (Sol-Gel) ...

درخت فناوري هاي نانو

درخت صنعت (كاربردهاي) نانو

Carbon Nanotube Applications Structure of a (7,1) (single-wall) carbon nanotube looking along the tube axis. The golden spheres represent carbon atoms and the bonds between them are marked by connecting lines. http://www.physnet.uni-hamburg.de/iap/group_s/Fig2.html