TY - JOUR
T1 - Effect of Solvent Vapor Annealing on Diblock Copolymer-Templated Mesoporous Si/Ge/C Thin Films
T2 - Implications for Li-Ion Batteries
AU - Weindl, Christian L.
AU - Fajman, Christian E.
AU - Giebel, Michael A.
AU - Wienhold, Kerstin S.
AU - Yin, Shanshan
AU - Tian, Ting
AU - Geiger, Christina
AU - Kreuzer, Lucas P.
AU - Schwartzkopf, Matthias
AU - Roth, Stephan V.
AU - Fässler, Thomas F.
AU - Müller-Buschbaum, Peter
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/5/27
Y1 - 2022/5/27
N2 - Although amphiphilic diblock copolymer templating of inorganic materials such as TiO2is already well investigated, sol-gel synthesis routines for porous silicon and germanium are relatively rare. Therefore, especially in the field of Li-ion batteries, novel synthesis routines with the possibility to tune the silicon and germanium ratio and the morphology in the nanometer regime are of high interest. Here, we demonstrate a synthesis method that allows a change of morphology and elemental composition with minimal effort. We evidence a morphological transformation in the nanometer regime with real space (scanning electron microscopy) and complementary reciprocal space analysis methods (grazing-incidence small-angle X-ray scattering). Although energy-dispersive X-ray spectroscopy (EDS) reveals a considerable amount of oxygen in the thin film, crystalline Ge in the bulk is detected with powder X-ray diffraction (PXRD) and Raman spectroscopy. Due to the system's simplicity, chemical mass production options such as roll-to-roll or slot-die printing can also be considered high-yield methods compared to standard synthesis routines.
AB - Although amphiphilic diblock copolymer templating of inorganic materials such as TiO2is already well investigated, sol-gel synthesis routines for porous silicon and germanium are relatively rare. Therefore, especially in the field of Li-ion batteries, novel synthesis routines with the possibility to tune the silicon and germanium ratio and the morphology in the nanometer regime are of high interest. Here, we demonstrate a synthesis method that allows a change of morphology and elemental composition with minimal effort. We evidence a morphological transformation in the nanometer regime with real space (scanning electron microscopy) and complementary reciprocal space analysis methods (grazing-incidence small-angle X-ray scattering). Although energy-dispersive X-ray spectroscopy (EDS) reveals a considerable amount of oxygen in the thin film, crystalline Ge in the bulk is detected with powder X-ray diffraction (PXRD) and Raman spectroscopy. Due to the system's simplicity, chemical mass production options such as roll-to-roll or slot-die printing can also be considered high-yield methods compared to standard synthesis routines.
KW - GISAXS
KW - diblock copolymer
KW - germanium
KW - polystyrene -b-poly(ethylene oxide)
KW - silicon
KW - sol-gel
KW - solvent vapor annealing
UR - http://www.scopus.com/inward/record.url?scp=85131676750&partnerID=8YFLogxK
U2 - 10.1021/acsanm.2c01191
DO - 10.1021/acsanm.2c01191
M3 - Article
AN - SCOPUS:85131676750
SN - 2574-0970
VL - 5
SP - 7278
EP - 7287
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 5
ER -