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M.Sc. Alena Bell

Contact

work +49 6151 16-21922

Work L2|07 206
Peter-Grünberg-Straße 16
64287 Darmstadt

  • Three-dimensional Raman spectroscopy of fluid and solid systems
  • 3D-printing of microfluidic channels and biocompatible substrates
  • Measurements of concentration gradients in fluid systems
Raman spectroscopic characterisation of mass transfer and of concentration gradients in fluid mixtures
2 J Auernhammer , AK Bell, M Schulze, Y Du, L Stühn, S Wendenburg, I Pause, M Biesalski, W Ensinger, RW Stark (2021):
Nanomechanical characterisation of a water-repelling terpolymer coating of cellulosic fibres
Cellulose 2021
DOI: 10.1007/s10570-020-03675-9
1 Khalil, Adnan ; Zimmermann, Matthias ; Bell, Alena K. ; Kunz, Ulrike ; Hardt, Steffen ; Kleebe, Hans-Joachim ; Stark, Robert W. ; Stephan, Peter ; Andrieu-Brunsen, Annette:
Insights into the interplay of wetting and transport in mesoporous silica films.
[Online-Edition: https://doi.org/10.1016/j.jcis.2019.09.093],
In: Journal of Colloid and Interface Science, (Online First), ISSN 00219797, (2019)
3 Alena Bell and Robert W. Stark
Raman spectroscopic evaluation of concentration gradients in small drops in binary mixtures on different substrates and in 3d printed small channels
DPG Spring Meeting of the Condensed Matter Section, Apr. 2019, Regensburg
2 Alena Bell, Marcus Schulze, Yue Du, Lukas Stühn, Sonja Wendenburg, Isabelle Pause, Markus Biesalski, Wolfgang Ensinger and Robert W. Stark
“Ein Regenmantel für Papier – Wenn Polymere Fasern festziehen – Einfluss von Polymerbeschichtungen auf Papier”
Science Flash on “Zellcheming” exhibition, Jun. 2018, Frankfurt
1 Alena Bell, Johannes Mohr, Tianhao Zhang and Robert W. Stark
Raman spectroscopic evaluation of mass transport and concentration gradients in mixtures
Annual meeting of the CRC 1194, Nov. 2017, Kirchbrombach
4 Alena Bell and Robert W. Stark
“Raman-spektroskopische Untersuchung des Stofftransportes und des Konzentrationsgefälles in Gemischen”
Workshop of the CRC 1194, Mai 2019, Darmstadt
3 Alena Bell and Robert W. Stark
Concentration Gradient Measurements by Raman Spectroscopy
Annual meeting of the CRC1194, Nov. 2018, Kirchbrombach
2 Alena Bell, Sonja Wendenburg, Markus Biesalski and Robert W. Stark
In situ Raman Spectroscopy on Paper Fibres during Tensile Testing and during Hydration
DPG Spring Meeting of the Condensed Matter Section, Mrz. 2018, Berlin
1 Alena Bell, Sonja Wendenburg, Markus Biesalski and Robert W. Stark
Hydration and Bending Tests on Cellulose Characterised by in situ Raman Spectroscopy
Poster contest of the Young-DGM Darmstadt, Dez. 2017, Darmstadt
  • “Grundpraktikum III” (materials science department)
  • “Fortgeschrittenenpraktikum II” (materials science department)
  • Mentoring of bachelor- and master-students
In many applications, such as in microfluidics, in printing and coating technologies, and in lab-on-a-chip devices, wetting properties play an important role. Wetting properties depend strongly on surface morphology and on the fluids. Momentum, heat and matter transfer have to be taken into account in this context. To characterise these phenomena, in this project the three-phase contact line will be characterised in microfluidic systems by Raman spectroscopy. Usually the microchannels are prepared by lithography in PDMS, but here another possibility by 3D printing the channels is tried. In this way the sample preparation is shortened and the suface modification can be obtained in the same step. Different fluid mixtured will be characterised on differently modified surfaces. The project is part of the CRC 1194, which studies the interaction between wetting and transport phenomena.