Title: Polarization-Dependent Optical Response in Anisotropic Nanoparticle–DNA Superlattices

Abstract

DNA-programmable assembly has been used to prepare superlattices composed of octahedral and spherical nanoparticles, respectively. These superlattices have the same body-centered cubic lattice symmetry and macroscopic rhombic dodecahedron crystal habit but tunable lattice parameters by virtue of the DNA length, allowing one to study and determine the effect of nanoscale structure and lattice parameter on the light-matter interactions in the superlattices. Backscattering measurements and finite-difference time-domain simulations have been used to characterize these two classes of superlattices. Superlattices composed of octahedral nanoparticles exhibit polarization-dependent backscattering but via a trend that is opposite to that observed in the polarization dependence for analogous superlattices composed of spherical nanoparticles. Electrodynamics simulations show that this polarization dependence is mainly due to the anisotropy of the nanoparticles and is observed only if the octahedral nanoparticles are well-aligned within the superlattices. Both plasmonic and photonic modes are identified in such structures, both of which can be tuned by controlling the size and shape of the nanoparticle building blocks, the lattice parameters, and the overall size of the three-dimensional superlattices (without changing habit).

Authors:

Sun, Lin ^[1]; Lin, Haixin ^[1]; Park, Daniel J. ^[1]; Bourgeois, Marc R. ^[1]; Ross, Michael B.  ^[1];

• Search DOE PAGES for author "Ross, Michael B."
• Search DOE PAGES for ORCID "0000-0002-2511-0594"

Ku, Jessie C. ^[1]; Schatz, George C. ^[1]; Mirkin, Chad A.  ^[1]

• Search DOE PAGES for author "Mirkin, Chad A."
• Search DOE PAGES for ORCID "0000-0002-6634-7627"

---

+ Show Author Affiliations

1. Northwestern Univ., Evanston, IL (United States)

Publication Date:

Thu Mar 30 00:00:00 EDT 2017

Research Org.:

Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:

1470205

Grant/Contract Number:  

SC0000989

Resource Type:

Accepted Manuscript

Journal Name:

Nano Letters

Additional Journal Information:

Journal Volume: 17; Journal Issue: 4; Related Information: CBES partners with Northwestern University (lead); Harvard University; New York University; Pennsylvania State University; University of Michigan; University of Pittsburgh; Journal ID: ISSN 1530-6984

Publisher:

American Chemical Society

Country of Publication:

United States

Language:

English

Subject:

59 BASIC BIOLOGICAL SCIENCES; catalysis (homogeneous); solar (photovoltaic); bio-inspired; charge transport; mesostructured materials; materials and chemistry by design; synthesis (novel materials); synthesis (self-assembly)