Open-channel metal particle superlattices

Yuanwei Li1,2, Wenjie Zhou2,3, Ibrahim Tanriover2,4, Wisnu Hadibrata2,4, Benjamin E Partridge2,3, Haixin Lin2,3, Xiaobing Hu5, Byeongdu Lee6, Jianfang Liu7, Vinayak P Dravid2,5, Koray Aydin2,4, Chad A Mirkin8,9,10,11

  1. Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA.
  2. International Institute for Nanotechnology, Northwestern University, Evanston, IL, USA.
  3. Department of Chemistry, Northwestern University, Evanston, IL, USA.
  4. Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA.
  5. Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
  6. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA.
  7. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  8. Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA. chadnano@northwestern.edu.
  9. International Institute for Nanotechnology, Northwestern University, Evanston, IL, USA. chadnano@northwestern.edu.
  10. Department of Chemistry, Northwestern University, Evanston, IL, USA. chadnano@northwestern.edu.
  11. Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA. chadnano@northwestern.edu.

Abstract

Although tremendous advances have been made in preparing porous crystals from molecular precursors1,2, there are no general ways of designing and making topologically diversified porous colloidal crystals over the 10-1,000 nm length scale. Control over porosity in this size range would enable the tailoring of molecular absorption and storage, separation, chemical sensing, catalytic and optical properties of such materials. Here, a universal approach for synthesizing metallic open-channel superlattices with pores of 10 to 1,000 nm from DNA-modified hollow colloidal nanoparticles (NPs) is reported. By tuning hollow NP geometry and DNA design, one can adjust crystal pore geometry (pore size and shape) and channel topology (the way in which pores are interconnected). The assembly of hollow NPs is driven by edge-to-edge rather than face-to-face DNA-DNA interactions. Two new design rules describing this assembly regime emerge from these studies and are then used to synthesize 12 open-channel superlattices with control over crystal symmetry, channel geometry and topology. The open channels can be selectively occupied by guests of the appropriate size and that are modified with complementary DNA (for example, Au NPs).

Biotechnology, Physical Sciences, BiochemistryNicholas Liao2022-11 (Nov)