TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Mukherjee, Ashutosh
A1  - Wackenhut, Frank
A1  - Dohare, Akanksha
A1  - Horneber, Anke
A1  - Lorenz, Anita
A1  - Müchler, Hendrik
A1  - Meixner, Alfred
A1  - Mayer, Hermann
A1  - Brecht, Marc
T1  - Three-dimensional (3D) surface-enhanced Raman spectroscopy (SERS) substrates: fabrication and SERS applications
JF  - The Journal of Physical Chemistry C: Energy, Materials, and Catalysis
N2  - This study introduces a straightforward approach to construct three-dimensional (3D) surface-enhanced Raman spectroscopy (SERS) substrates using chemically modified silica particles as microcarriers and by attaching metal nanoparticles (NPs) onto their surfaces. Tollens’ reagent and sputtering techniques are utilized to prepare the SERS substrates from mercapto-functionalized silica particles. Treatment with Tollens’ reagent generates a variety of silver NPs, ranging from approximately 10 to 400 nm, while sputtering with gold (Au) yields uniformly distributed NPs with an island-like morphology. Both substrates display wide plasmon resonances in the scattering spectra, making them effective for SERS in the visible spectral range, with enhancement factors (ratio of the analyte’s intensity at the hotspot compared to that on the substrate in the absence of metal nanoparticles) of up to 25. These 3D substrates have a significant advantage over traditional SERS substrates because their active surface area is not limited to a 2D surface but offers a much greater active surface due to the 3D arrangement of the NPs. This feature may enable achieving much higher SERS intensity from within streaming liquids or inside cells/tissues.
KW  - gold
KW  - metal nanoparticles
KW  - metals
KW  - plasmons
KW  - Raman spectroscopy
Y1  - 2023
SN  - 1932-7447
SS  - 1932-7447
U6  - https://doi.org/10.1021/acs.jpcc.3c02410
DO  - https://doi.org/10.1021/acs.jpcc.3c02410
VL  - 127
IS  - 28
SP  - 13689
EP  - 13698
S1  - 10
PB  - American Chemical Society
CY  - Washington, DC
ER  -