TY  - GEN
A1  - Alber, Ina
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/14035/
N2  - Cylindrical, metallic nanowires were electrochemically grown in nanochannels created in polymer membranes by etching of ion tracks. These nanowires consisted of
Au or AuAg alloy with varying element ratio. In additon, segmented Au-rich/Ag-rich/Au-rich nanowires were synthesized by applying pulsed deposition. The duration
of the pulses controls the length of the segments. By subsequent chemical dissolution
nanowires separated by nanogaps with dimensions as small as 5 nm were also created,
so-called nanowire dimers. Incomplete dissolution of the gap resulted in dimers connected
by a conductive junction. Upon the excitation of surface plasmons in dimers
separated by nanogaps smaller than 20 nm, high field enhancement is generated in
the nanogap. We analysed the plasmonic properties of the synthesized structures by
electron energy loss spectroscopy in a transmission electron microscope. This method
enables the simultaneous investigation of the nanostructure morphology and the surface
plasmon resonance energies. The analysis of single nanowires, and capacitively
and conductively coupled nanowire dimers revealed that the resonance energies depend
sensitively on many parameters, as length, diameter, gap size, as well as composition
and morphology. Precise knowledge of the plasmonic properties of the synthesized
structures are important for the future applications as substrates for surface enhanced
infrared and Raman spectroscopy.
TI  - Synthesis and Plasmonic Properties of Metallic Nanowires and Nanowire Dimers
ID  - heidok14035
AV  - public
KW  - nanowire
KW  -  nanowire dimer
KW  -  ion track-etched membrane
KW  -  electrodeposition
KW  -  on-wire lithography
KW  -  electron energy-loss spectroscopy
KW  -  surface plasmon resonance
KW  -  
Y1  - 2012///
ER  -