Structural and optical properties of self-assembled chains of plasmonic nanocubes
- Univ., of Toronto, Toronto, Ontario (Canada)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
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 cylindrical nanorods. In this paper, 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. In comparison with chains of nanospheres with similar dimensions, composition, and surface chemistry, 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 colinear NCs, and a new coupling mode for NC chains due to the formation of a Fabry–Perot resonator structure formed by face-to-face bonded NCs. The NC chains exhibited stronger surface-enhanced Raman scattering in comparison with linear assemblies of nanospheres. Finally, the experimental results were in agreement with finite difference time domain simulations.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Toronto, ON (Canada)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Sciences and Engineering Research Council of Canada (NSERC); Univ. of Toronto (Canada)
- Grant/Contract Number:
- SC00112704; AC02-06CH11357; AC02-98CH10886
- OSTI ID:
- 1182532
- Alternate ID(s):
- OSTI ID: 1339160
- Report Number(s):
- BNL-107610-2015-JA; R&D Project: 16076; KC0403020
- Journal Information:
- Nano Letters, Vol. 14, Issue 11; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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