%0 Journal Article %1 Bergler_2013 %A Bergler, Felix F. %A Schöppler, Friedrich %A Brunecker, Frank K. %A Hailman, Michael %A Hertel, Tobias %D 2013 %I American Chemical Society (ACS) %J The Journal of Physical Chemistry C %K excitons myown swnt %N 25 %P 13318--13323 %R 10.1021/jp403711e %T Fluorescence Spectroscopy of Gel-Immobilized Single-Wall Carbon Nanotubes with Microfluidic Control of the Surfactant Environment %U https://doi.org/10.1021%2Fjp403711e %V 117 %X We describe the design and use of a microfluidic fluorescence cell for nanoparticle spectroscopy. The cell allows for microfluidic control of solvent and surfactant environments to study interfacial processes of nanoscale systems. We present a spectroscopic investigation on the effect of surfactant type and concentrations on the first subband exciton transition of (6,5) single-wall carbon nanotubes (SWNTs). SWNT fluorescence here serves as a surface-sensitive probe of changes at the surfactant–nanotube interface. The experiments show that a displacement of H2O or of adsorbed DNA by sodium cholate from solution leads to a pronounced blue-shift of exciton emission features and a roughly 5-fold increase of photoluminescence (PL) intensities. This is due to a combination of physical and chemical interactions. The major contribution to changes in PL quantum yield and exciton peak position can be attributed to changes in dielectric screening and its effect on exciton oscillator strengths.

@article{Bergler_2013, abstract = {We describe the design and use of a microfluidic fluorescence cell for nanoparticle spectroscopy. The cell allows for microfluidic control of solvent and surfactant environments to study interfacial processes of nanoscale systems. We present a spectroscopic investigation on the effect of surfactant type and concentrations on the first subband exciton transition of (6,5) single-wall carbon nanotubes (SWNTs). SWNT fluorescence here serves as a surface-sensitive probe of changes at the surfactant–nanotube interface. The experiments show that a displacement of H2O or of adsorbed DNA by sodium cholate from solution leads to a pronounced blue-shift of exciton emission features and a roughly 5-fold increase of photoluminescence (PL) intensities. This is due to a combination of physical and chemical interactions. The major contribution to changes in PL quantum yield and exciton peak position can be attributed to changes in dielectric screening and its effect on exciton oscillator strengths.}, added-at = {2021-01-13T15:04:33.000+0100}, author = {Bergler, Felix F. and Schöppler, Friedrich and Brunecker, Frank K. and Hailman, Michael and Hertel, Tobias}, biburl = {https://www.bibsonomy.org/bibtex/2f85f75742578032ef99b070cce963416/hertel-group}, description = {Fluorescence Spectroscopy of Gel-Immobilized Single-Wall Carbon Nanotubes with Microfluidic Control of the Surfactant Environment | The Journal of Physical Chemistry C}, doi = {10.1021/jp403711e}, interhash = {89f14d25253bf2703898b2059d1305c2}, intrahash = {f85f75742578032ef99b070cce963416}, journal = {The Journal of Physical Chemistry C}, keywords = {excitons myown swnt}, month = jun, number = 25, pages = {13318--13323}, publisher = {American Chemical Society ({ACS})}, timestamp = {2021-01-27T09:11:52.000+0100}, title = {Fluorescence Spectroscopy of Gel-Immobilized Single-Wall Carbon Nanotubes with Microfluidic Control of the Surfactant Environment}, url = {https://doi.org/10.1021%2Fjp403711e}, volume = 117, year = 2013 }