TY  - JOUR
A1  - Filimon, Marlena
A1  - Kopf, Ilona
A1  - Ballout, Fuad
A1  - Schmidt, Dietrich A.
A1  - Bruendermann, Erik
A1  - Rühe, Jürgen
A1  - Santer, Svetlana
A1  - Havenith, Martina
T1  - Smart polymer surfaces : mapping chemical landscapes on the nanometre scale
N2  - We show that Scattering Infrared Near-field Microscopy (SNIM) allows chemical mapping of polymer monolayers that can serve as designed nanostructured surfaces with specific surface chemistry properties on a nm scale. Using s- SNIM a minimum volume of 100 nm x 100 nm x 15 nm is sufficient for a recording of a "chemical'' IR signature which corresponds to an enhancement of at least four orders of magnitudes compared to conventional FT-IR microscopy. We could prove that even in cases where it is essentially difficult to distinguish between distinct polymer compositions based solely on topography, nanophase separated polymers can be clearly distinguished according to their characteristic near-field IR response.
Y1  - 2010
UR  - http://www.rsc.org/Publishing/Journals/sm/index.asp
U6  - https://doi.org/10.1039/C0sm00098a
SN  - 1744-683X
ER  - 
TY  - JOUR
A1  - Di Florio, Giuseppe
A1  - Bruendermann, Erik
A1  - Yadavalli, Nataraja Sekhar
A1  - Santer, Svetlana
A1  - Havenith, Martina
T1  - Polarized 3D Raman and nanoscale near-field optical microscopy of optically inscribed surface relief gratings: chromophore orientation in azo-doped polymer films
JF  - Soft matter
N2  - We have used polarized confocal Raman microspectroscopy and scanning near-field optical microscopy with a resolution of 60 nm to characterize photoinscribed grating structures of azobenzene doped polymer films on a glass support. Polarized Raman microscopy allowed determining the reorientation of the chromophores as a function of the grating phase and penetration depth of the inscribing laser in three dimensions. We found periodic patterns, which are not restricted to the surface alone, but appear also well below the surface in the bulk of the material. Near-field optical microscopy with nanoscale resolution revealed lateral two-dimensional optical contrast, which is not observable by atomic force and Raman microscopy.
Y1  - 2014
U6  - https://doi.org/10.1039/c3sm51787j
SN  - 1744-683X
SN  - 1744-6848
VL  - 10
IS  - 10
SP  - 1544
EP  - 1554
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Filimon, Marlena
A1  - Kopf, Ilona
A1  - Schmidt, Dietrich A.
A1  - Bruendermann, Erik
A1  - Rühe, Jürgen
A1  - Santer, Svetlana
A1  - Havenith, Martina
T1  - Local chemical composition of nanophase-separated polymer brushes
JF  - Physical chemistry, chemical physics : a journal of European Chemical Societies
N2  - Using scattering scanning nearfield infrared microscopy (s-SNIM), we have imaged the nanoscale phase separation of mixed polystyrene-poly(methyl methacrylate) (PS-PMMA) brushes and investigated changes in the top layer as a function of solvent exposure. We deduce that the top-layer of the mixed brushes is composed primarily of PMMA after exposure to acetone, while after exposure to toluene this changes to PS. Access to simultaneously measured topographic and chemical information allows direct correlation of the chemical morphology of the sample with topographic information. Our results demonstrate the potential of s-SNIM for chemical mapping based on distinct infrared absorption properties of polymers with a high spatial resolution of 80 nm x 80 nm.
Y1  - 2011
U6  - https://doi.org/10.1039/c0cp02756a
SN  - 1463-9076
VL  - 13
IS  - 24
SP  - 11620
EP  - 11626
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -