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MRI Seminar: "DNA origami: The bridge from Top to Bottom", Prof. Ashwin Gopinath, MIT

Date: Wed 3 Feb 2021, 15:00 - 16:00

Location: Microsoft Teams:


Conventional top-down nanofabrication, over the last six decades, has enabled almost all the complex electronic, optical and micro-fluidic devices that form the foundation of our society. Parallel efforts, exploring bottom-up self-assembly processes, have also enabled design and synthesis of structures like quantum dots, carbon nanotubes and unique bio-molecules that possess technologically relevant proper- ties unachievable top-down. While both these approaches have independently matured, ongoing efforts to create “hybrid nanostructures” combining both strategies, has been fraught with technical challenges. The main roadblock is the absence of a scalable method to deterministically organize components built bottom-up within top-down nanofabricated structures.

In this talk, I will first introduce a directed self-assembly technique that utilizes DNA origami1 as a molecular adaptor to modularly position, and orient, bottom-up nano-components (like quantum dots, light emitters and proteins) within top-down nanofabricated devices.2 I will then present experimental results demonstrating the utility of the technique to achieved absolute, arbitrarily scalable, control over the integration of discrete emitters inside optical devices.3,4 Finally, I conclude by presenting my vision of how a DNA origami based bridge between top-down and bottom-up nanofabrication can enable a range of highly transformative, and functional, devices. Specifically, I will present data demonstrating arrays of single-photon sources, method for extremely economical nanotexturing as well as a modular molecular interface between biology and solid-state.

1. Rothemund, P. W. K. Nature 2006, 440, 297–302.
2. Gopinath, A. et al. ACS Nano 2014, 8, 12030–12040.
3. Gopinath, A. et al. Nature 2016, 535, 401–405.
4. Gopinath, A. et al. Science (Accepted)

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Updated by: Oliver Fenwick