Centre for Nano science & Engineering - Seminar
Speaker : Dr. Ashwin Gopinath, California Institute of
Technology, California
Venue : CeNSE Seminar Hall
Date & Time : 25th May,2017 Thursday, 10 AM
Coffee/Tea and snacks: After the talk
Title : DNA origami: The bridge to the bottom.
Abstract:
Conventional top-down nanofabrication, over the last six decades, has enabled almost all the complex electronic and optical devices that form the foundation of our society. Over the same timeframe, self-assembly processes within naturally occurring materials have been also studied extensively, enabling nanostructures like quantum dots and carbon nanotubes with properties unattainable top-down. While both these approaches have independently matured, efforts to create “hybrid nanostructures” combining both strategies have been fraught with technical challenges. The main roadblock being the absence of a scalable method to organize components built bottom-up within top-down nanofabrication framework.
In this talk, I will introduce a directed self-assembly technique that utilizes DNA origamis of defined shapes as modular adaptors to position and orient bottom-up nanocomponents within top-down nanofabricated devices. I will also be discussing the utility of this technique to realize functional devices. Specifically, I will discuss results demonstrating the deterministic organization of discrete emitters inside photonic crystal cavities (PCCs) to map the modes of PCCs using an epifluorescence microscope, create ultra-small 2D polarimeter and to enable optimized light-matter interaction within optical resonators. Finally, I will conclude by presenting my vision, as well as preliminary data, of how DNA origami and it's integration with top-down nanofabrication can enable a wide variety of functional electronic, optical and biomedical devices that are essential for meeting societal challenges in the 21st century.