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2016.2.4学术报告:DNA 自组装纳米光子器件和材料的研究

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时间:2016-02-03  来源:文本大小:【 |  | 】  【打印

  报告题目:DNA 自组装纳米光子器件和材料的研究   

  时间:201624日,上午1000   

  地点:瞬态室三楼会议室   

  报告人:匡万(副教授),美国博伊西州立大学   

     

  AbstractDNA origami self-assembly has been demonstrated as a robust approach to arrange nanoparticles into three dimensions that function as an optical waveguide, circular polarizer, or crossover splitters on the sub-diffraction scale. DNA origami is a self-assembly technique, where hundreds of short (30-50 bases) synthetic oligonucleotides — so-called staple strands — are annealed with a long (8 kb) virus-derived scaffold strand. Such DNA origami structures can serve as precisely addressable templates onto which nanomaterials such as noble metal nanoparticles and quantum dots can be assembled. A specific location or “pixel,” consisting of a staple strand, on the folded origami can be addressed because each pixel contains a unique DNA sequence. Spatial resolution as small as 0.34 nm can be achieved. This spatial addressability provides great latitude of design for optical nanostructures.   

  In this talk, we demonstrate the use of DNA origami to arrange gold nanoparticles and create functioning, mechanically stable waveguides and chiral metamaterials. Plasmonic nanostructures consisting of gold nanoparticle (AuNP) arrays were synthesized by attaching 10 nm diameter AuNPs to DNA origami templates. The properties of the plasmonic waveguides were characterized by atomic force microscopy (AFM), transmission electron microscope (TEM), optical microscopy, and spectroscopy. We also demonstrated the use of super-resolution microscopy for DNA origami array characterization. Precise metrology is the cornerstone for quality control in the semiconductor industry. Rather than performing passive measurements on self-assembled arrays, defects can be self-identified by fluorescence.   

     

  Biography   

  Wan Kuang completed his PhD from University of Southern California in 2005. He is the recipient of 2009 NSF CAREER award. He is currently with the department of Electrical and Computer Engineering at Boise State University. Dr. Kuang’s current research interests are focused in the areas of nano-scale photonic devices, photonic bandgap material, and electrodynamic numerical simulations. The mission of nanophotonics research is to scale optical devices and components to their ultimate size limits.