TY  - JOUR
A1  - Prinz, Julia
A1  - Matkovic, Aleksandar
A1  - Pesic, Jelena
A1  - Gajic, Rados
A1  - Bald, Ilko
T1  - Hybrid Structures for Surface-Enhanced Raman Scattering: DNA Origami/Gold Nanoparticle Dimer/Graphene
JF  - Small
N2  - A combination of three innovative materials within one hybrid structure to explore the synergistic interaction of their individual properties is presented. The unique electronic, mechanical, and thermal properties of graphene are combined with the plasmonic properties of gold nanoparticle (AuNP) dimers, which are assembled using DNA origami nanostructures. This novel hybrid structure is characterized by means of correlated atomic force microscopy and surface-enhanced Raman scattering (SERS). It is demonstrated that strong interactions between graphene and AuNPs result in superior SERS performance of the hybrid structure compared to their individual components. This is particularly evident in efficient fluorescence quenching, reduced background, and a decrease of the photobleaching rate up to one order of magnitude. The versatility of DNA origami structures to serve as interface for complex and precise arrangements of nanoparticles and other functional entities provides the basis to further exploit the potential of the here presented DNA origami-AuNP dimer-graphene hybrid structures.
Y1  - 2016
U6  - https://doi.org/10.1002/smll.201601908
SN  - 1613-6810
SN  - 1613-6829
VL  - 12
SP  - 5458
EP  - 5467
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Matkovic, Aleksandar
A1  - Vasic, Borislav
A1  - Pesic, Jelena
A1  - Prinz, Julia
A1  - Bald, Ilko
A1  - Milosavljevic, Aleksandar R.
A1  - Gajic, Rados
T1  - Enhanced structural stability of DNA origami nanostructures by graphene encapsulation
JF  - NEW JOURNAL OF PHYSICS
N2  - We demonstrate that a single-layer graphene replicates the shape of DNA origami nanostructures very well. It can be employed as a protective layer for the enhancement of structural stability of DNA origami nanostructures. Using the AFM based manipulation, we show that the normal force required to damage graphene encapsulated DNA origami nanostructures is over an order of magnitude greater than for the unprotected ones. In addition, we show that graphene encapsulation offers protection to the DNA origami nanostructures against prolonged exposure to deionized water, and multiple immersions. Through these results we demonstrate that graphene encapsulated DNA origami nanostructures are strong enough to sustain various solution phase processing, lithography and transfer steps, thus extending the limits of DNA-mediated bottom-up fabrication.
KW  - graphene
KW  - DNA origami nanostructures
KW  - atomic force microscopy
Y1  - 2016
U6  - https://doi.org/10.1088/1367-2630/18/2/025016
SN  - 1367-2630
VL  - 18
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -