纳米技术,窥见微小世界 英文演讲Nanotechnology, Discovering a Tiny World..ppt

Contents 1. Introduction 2. Putting Nanotechnology to use 3. Nanotechnology in our research field 4. Conclusion * * * * Chi Yao 2012.11.16 Nanotechnology, Discovering a Tiny World. What is nanotechnology? “The understanding and control of matter at dimensions of roughly 1 to 100 nanometers (nm), where unique phenomena enable novel applications.” Developments during the past decade in biochemistry, physical chemistry, microscopy, and engineering have resulted in a tremendous upsurge of interest in the properties of very small particles and their possible applications in a wide variety of products. Technological innovations have enabled the manipulation of tiny structures called dendrimers, quantum dots, nanoshells, nanotubes, and buckyballs (fullerenes), etc. ——National Science Foundation 1. Introduction 2. Putting Nanotechnology to use Over the past two decades, scientists and engineers have been mastering the intricacies of working with nanoscale materials. Now researchers have a clearer picture of how to create nanoscale materials with properties never envisioned before. Products using nanoscale materials and process are now available. 2.1 Drug-Delivery Technique Dendrimers are a type of nanostructure that can be precisely designed and manufactured for a wide variety of applications, including the treatment of cancer and other diseases. Dendrimers carrying different materials an their branches can do several things at one time, such as recognising diseased cells, diagnosing diseased states (including cell death), drug delivery, reporting location, and reporting outcomes of therapy . 2.2 Nano films Different nanoscale materials can be used in thin films to make them water repellent, antireflective, self-cleaning, Ultraviolet or infrared-resistant, anti-fog, anti-microbial, Scratchresistant,or electrically conductive. Nano films are used now on eyeglasses, computer display and cameras to protect or treat