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Title: Structural and optical properties of self-assembled chains of plasmonic nanocubes

Solution-based linear self-assembly of metal nanoparticles offers a powerful strategy for creating plasmonic polymers, which, so far, have been formed from spherical nanoparticles and nanorods. Here, we report linear solution-based self-assembly of metal nanocubes (NCs), examine the structural characteristics of the NC chains and demonstrate their advanced optical characteristics. Predominant face-to-face assembly of large NCs coated with short polymer ligands led to a larger volume of hot spots in the chains, a nearly uniform E-field enhancement in the gaps between co-linear NCs and a new coupling mode for NC chains, in comparison with chains of nanospheres with similar dimensions, composition and surface chemistry. The NC chains exhibited a stronger surface enhanced Raman scattering (SERS) signal, in comparison with linear assemblies of nanospheres. The experimental results were in agreement with finite difference time domain (FDTD) simulations.
 [1] ;  [2] ;  [1] ;  [3] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ., of Toronto, Toronto, Ontario (Canada)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1530-6984; R&D Project: 16076; KC0403020
Grant/Contract Number:
SC00112704; AC02-06CH11357; AC02-98CH10886
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 14; Journal Issue: 11; Journal ID: ISSN 1530-6984
American Chemical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Toronto, ON (Canada)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Natural Sciences and Engineering Research Council of Canada (NSERC); Univ. of Toronto (Canada)
Country of Publication:
United States
77 NANOSCIENCE AND NANOTECHNOLOGY; functional nanomaterials; nanoparticle; nanocube; nanosphere; self-assembly; nanoparticle chain; SERS; plasmonics
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1339160