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@ARTICLE{Poatyska:828165,
      author       = {Połatyńska, Agnieszka and Tomczyk, Karolina and
                      Pochylski, Mikołaj and Meier, G. and Gapinski, Jacek and
                      Banachowicz, Ewa and Śliwa, Tomasz and Patkowski, Adam},
      title        = {{T}emperature dependent {FCS} studies using a long working
                      distance objective: {V}iscosities of supercooled liquids and
                      particle size},
      journal      = {The journal of chemical physics},
      volume       = {146},
      number       = {8},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2017-02133},
      pages        = {084506 -},
      year         = {2017},
      abstract     = {In this work, we describe new experimental setups for
                      Fluorescence Correlation Spectroscopy (FCS) where a long
                      working distance objective is used. Using these setups, FCS
                      measurements in a broad temperature range for a small sample
                      volume of about 50 μlcan be performed. The use of specially
                      designed cells and a dry long working distance objective was
                      essential for avoiding temperature gradients in the sample.
                      The performance of the new setups and a traditional FCS
                      setup with immersion objectives is compared. The FCS data in
                      combination with the Stokes-Einstein (SE) relation were used
                      to obtain the values of the nanoviscosity of a fluid. We
                      show for selected molecular van der Waals supercooled
                      liquids that despite the fact that in these systems, a
                      characteristic length scale can be defined, the
                      nanoviscosity obtained from FCS is in a very good agreement
                      with the macroscopic (rheometric) viscosity of the sample in
                      a broad temperature range. This result corroborates the
                      applicability of the SE relation to supercooled liquids at
                      temperatures above 1.2 Tg. We also show that the temperature
                      dependent size of thermoresponsive microgel particles can be
                      determined by FCS using the designed cells and a long
                      working distance objective in a broader size range without a
                      need to use the correction procedure since the size
                      correction is proportional to the square of the ratio of the
                      hydrodynamic radius to the confocal volume size.},
      cin          = {ICS-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000395901000040},
      doi          = {10.1063/1.4977047},
      url          = {https://juser.fz-juelich.de/record/828165},
}