TY  - JOUR
A1  - Heck, Christian
A1  - Prinz, Julia
A1  - Dathe, Andre
A1  - Merk, Virginia
A1  - Stranik, Ondrej
A1  - Fritzsche, Wolfgang
A1  - Kneipp, Janina
A1  - Bald, Ilko
T1  - Gold Nanolenses Self-Assembled by DNA Origami
T2  - ACS Photonics
N2  - Nanolenses are self-similar chains of metal nanoparticles, which can theoretically provide extremely high field enhancements. Yet, the complex structure renders their synthesis challenging and has hampered closer analyses so far. Here, DNA origami is used to self-assemble 10, 20, and 60 nm gold nanoparticles as plasmonic gold nanolenses (AuNLs) in solution and in billions of copies. Three different geometrical arrangements are assembled, and for each of the three designs, surface-enhanced Raman scattering (SERS) capabilities of single AuNLs are assessed. For the design which shows the best properties, SERS signals from the two different internal gaps are compared by selectively placing probe dyes. The highest Raman enhancement is found for the gap between the small and medium nanoparticle, which is indicative of a cascaded field enhancement.
KW  - plasmonics
KW  - DNA origami
KW  - SERS
KW  - nanolenses
KW  - gold nanoparticles
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/55133
SN  - 2330-4022
VL  - 4
SP  - 1123
EP  - 1130
PB  - American Chemical Society
CY  - Washington
ER  -