Journal
NANO LETTERS
Volume 18, Issue 4, Pages 2645-2649Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b00509
Keywords
Multiplexed encoding; DNA-mediated assembly; gold nanoparticles; gap mode; size-selective assembly
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Funding
- Air Force Office of Scientific Research [FA9550-12-1-0280, FA9550 17-1-0348]
- Sherman Fairchild Foundation, Inc.
- Center for Bio-Inspired Energy Science, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0000989]
- Office of Naval Research Young Investigator Program
- Cabell Terminal Year Fellowship from Northwestern University
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF NNCI-1542205]
- MRSEC program at the Materials Research Center [NSF DMR-1121262]
- Keck Foundation
- State of Illinois, through the IIN
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Multiplexed surface encoding is achieved by positioning two different sizes of gold nanocubes on gold surfaces with precisely defined locations for each particle via template-confined, DNA-mediated nanoparticle assembly. As a proof-of-concept demonstration, cubes with 86 and 63 nm edge lengths are assembled into arrangements that physically and spectrally encrypt two sets of patterns in the same location. These patterns can be decrypted by mapping the absorption intensity of the substrate at lambda = 773 and 687 nm, respectively. This multiplexed encoding platform dramatically increases the sophistication and density of codes that can be written using colloidal nanoparticles, which may enable high-security, high-resolution encoding applications.
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