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@ARTICLE{Lee:907908,
      author       = {Lee, Namkyu and Mohanakumar, Shilpa and Wiegand, Simone},
      title        = {{T}hermophoretic microfluidic cells for evaluating {S}oret
                      coefficient of colloidal particles},
      journal      = {International journal of heat and mass transfer},
      volume       = {194},
      issn         = {0017-9310},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2022-02277},
      pages        = {123002 -},
      year         = {2022},
      abstract     = {Thermodiffusion or thermophoresis gained much interest in
                      bio, chemical, and energy engineering. Al- though there are
                      several methods to measure thermophoresis, they consume
                      large sample volumes, are limited to binary mixtures, and
                      give only indirect access to the applied temperature
                      profile. Herein, we propose a thermophoretic microfluidic
                      cell for quantitative measurements of the Soret coefficient
                      of col- loids. The actual microscale measuring channel lies
                      between cooling and heating channels to achieve a
                      one-dimensional temperature gradient. Fluorescence lifetime
                      imaging microscopy with Rhodamine B is utilized to measure
                      the spatial temperature profile in the channel. The
                      fluorescence intensity of fluo- rescently labeled
                      polystyrene particles with a diameter of 25 nm is used to
                      monitor the concentration profile. The observed temperature
                      and concentration profiles are one-dimensional, as gradients
                      in the longitudinal and height directions can be neglected.
                      In the investigated temperature range, the averaged
                      difference between the measured Soret coefficients with the
                      cell and determined with the Thermal Dif- fusion Forced
                      Rayleigh Scattering set-up is less than $8\%.$},
      cin          = {IBI-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IBI-4-20200312},
      pnm          = {5241 - Molecular Information Processing in Cellular Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-5241},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000806815900002},
      doi          = {10.1016/j.ijheatmasstransfer.2022.123002},
      url          = {https://juser.fz-juelich.de/record/907908},
}