Publications

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Peer-reviewed journal papers


15.
R. Barnkob, C. Cierpka, M. Chen, S. Sachs, P. Mäder, and M. Rossi,
Optimization of defocus particle tracking based on image recognition,
in review, Measurement Science and Technology (MST), 2020

14. R. Barnkob and M. Rossi,
DefocusTracker: A modular toolbox for defocusing-based, single-camera, 3D particle tracking,
in review, Journal of Open Research Software (JORS), 2020, https://arxiv.org/abs/2102.03056

13. M. Rossi and R. Barnkob,
A fast and robust algorithm for General Defocusing Particle Tracking,
Measurement Science and Technology, 2020, 31, 014001

12. R. Barnkob and M. Rossi,
General Defocusing Particle Tracking: Fundamentals and uncertainty assessment,
Experiments in Fluids, 2020, 61, 1-14

11. R. Barnkob, N. Nama, L. Ren, T. J. Huang, F. Costanzo, and C. J. Kähler,
Acoustically Driven Fluid and Particle Motion in Confined and Leaky Systems,
Phys Rev Applied, 2018, 9, 014027 (pdf)

10.
R. Barnkob, C. J. Kähler, and M. Rossi,
General defocusing particle tracking,
Lab Chip, 2015, 15, 3556-3560 (pdf)

9.
N. Nama, R. Barnkob, Z. Mao, C. J. Kähler, F. Costanzo, and T. J. Huang,
Numerical study of acoustophoretic motion of particles in a PDMS microchannel driven by surface acoustic waves,
Lab Chip, 2015, 15, 2700-2809 (pdf)

8.
I. Iranmanesh, R. Barnkob, H. Bruus, and M. Wiklund,
Tunable-angle wedge transducer for improved acoustophoretic control in a microfluidic chip,
J Micromech Microeng, 2013, 23, 105002 (pdf)

7.
P.B. Muller, M. Rossi, Á. G. Marín, R. Barnkob, P. Augustsson, T. Laurell, C. J. Kähler, and H. Bruus,
Ultrasound-induced acoustophoretic motion of microparticles in three dimensions,
Phys Rev E, 2013, 88, 023006 (pdf)

6.
R. Barnkob, P. Augustsson, T. Laurell, and H. Bruus,
Acoustic radiation- and streaming-induced microparticle velocities determined by micro-PIV in an ultrasound symmetry plane,
Phys Rev E, 2012, 86, 056307 (pdf)

5.
P. B. Muller, R. Barnkob, M. J. H. Jensen, and H. Bruus,
A numerical study of microparticle acoustophoresis driven by acoustic radiation forces and streaming-induced drag forces,
Lab Chip, 2012, 12, 4617-4627 (pdf)

4.
J. D. Adams*, C. L. Ebbesen*, R. Barnkob, A. H. J. Yang, H. T. Soh, and H. Bruus,
High-throughput, temperature-controlled microchannel acoustophoresis device made with rapid prototyping,
J Micromech Microeng, 2012, 22, 075017 (pdf), *Shared first authorship.

3.
R. Barnkob, I. Iranmanesh, M. Wiklund, and H. Bruus,
Measuring acoustic energy density in microchannel acoustophoresis using a simple and rapid light-intensity method,
Lab Chip, 2012, 12, 2337-2344 (pdf, promoted as hot article)

2.
P. Augustsson*, R. Barnkob*, S. T. Wereley, H. Bruus, and T. Laurell,
Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization,
Lab Chip, 2011, 11, 4152-4164 (pdf, exposed on journal front cover), *Shared first authorship.

1.
R. Barnkob, P. Augustsson, T. Laurell, and H. Bruus, Measuring the local pressure amplitude in microchannel acoustophoresis,
Lab Chip, 2010, 10, 563-570 (pdf, exposed on journal front cover)


Peer-reviewed conference papers


27.
C. Cierpka, S. Sachs, P. Mäder, M. Chen, R. Barnkob, and M. Rossi,
On the uncertainty of defocus methods for 3D particle tracking velocimetry,
14th International Symp. on Particle Image Velocimetry – ISPIV 2021, August 1-4, 2021, Chicago, IL, USA.


26. R. Barnkob,
Experimental assessment and modeling of acoustophoretic particle trajectories,
The 179th Meeting of the Acoustical Society of America, 7-11 December 2020, Acoustics Virtually Everywhere, pp. 2707.


25. B. Sailer, R. Barnkob, and O. Hayden,
Cell manipulation via acoustic forces in a spherical microchamber,
Proc. 24
rd MicroTAS, 4-8 October 2020, Virtual Conference, pp. 254-255, CBMS, 2020.


24. M. Kim, R. Barnkob, and M. Meacham,
Quantifying the acoustic field in a microchannel using microswimmers as measurement probes,
Proc. 24
rd MicroTAS, 4-8 October 2020, Virtual Conference, pp. 162-163, CBMS, 2020.


23. N. Nama and R. Barnkob,
Analytical prediction of acoustic radiation forces in soft-walled microchannels driven by standing surface acoustic waves,
Acoustofluidics Virtual 2020 conference, 26-27 August 2020, pp. 131-132.


22. B. Sailer, R. Barnkob, and O. Hayden,
Acoustic particle trapping in a spherical microchamber,
Acoustofluidics Virtual 2020 conference, 26-27 August 2020, pp. 131-132.


21. M. Kim, R. Barnkob, and M. Meacham,
Microswimmers as living probes to measure the acoustic energy density in acoustofluidic,
Acoustofluidics Virtual 2020 conference, 26-27 August 2020, pp. 23-24.


20. M. Heiss and R. Barnkob,
Acoustophoresis in gel-filled microchannels --- Towards in vivo-like cell manipulation and cell migration studies,
Proc. 23rd MicroTAS, 27-31 October 2019, Basel, Switzerland, pp. 1610-1611, CBMS, 2019.


19. M. Rossi, R. Barnkob, O. Hayden, and H. Bruus,
Simulation of feedback-controlled 3D acoustophoresis using GDPT,
Acoustofluidics 2019 conference, 25-28 August 2019, University of Twente, Enschede, The Netherlands.


18. A. Marín, E. Ortega, T. Guimaraes, and R. Barnkob,
Unclogging suspension flows through constrictions by ear,
Acoustofluidics 2019 conference, 25-28 August 2019, University of Twente, Enschede, The Netherlands.


17. M. Rossi and R. Barnkob,
Toward automated 3D PTV for microfluidics,
13th International Sympos. on Particle Image Velocimetry – ISPIV 2019, Munich, Germany, July 22-24, 2019


16.
R. Barnkob, N. Nama, L. Ren, T. J. Huang, F. Costanzo, and C. J. Kähler,
Acoustophoresis in soft-walled microchannels driven by surface acoustic waves,
Flow17 Conference, 3-5 July 2017, Paris, France


15.
R. Barnkob, N. Nama, L. Ren, T. J. Huang, F. Costanzo, and C. J. Kähler,
Streaming direction and microparticle size effects in standing surface acoustic wave (SAW) devices,
Proc. 20th MicroTAS, 9-13 October 2016, Dublin, Ireland, pp. 1643-1644, CBMS, 2015


14. R. Barnkob, N. Nama, L. Ren, F. Costanzo, T. J. Huang, and C. J. Kähler,
Radiation-dominated microparticle motion in a PDMS microchannel driven by a standing surface acoustic waves,
Acoustofluidics 2016 conference, 22-23 September 2016, Technical University of Denmark, Denmark.


13. N. Nama,
R. Barnkob, C. J. Kähler, F. Costanzo, and T. J. Huang,
Numerical investigation of surface acoustic wave driven microparticle acoustophoresis,
Proc. 19th MicroTAS, 25-29 October 2015, Gyeongju, Korea, CBMS, 2015.


12.
R. Barnkob, C. J. Kähler, and M. Rossi,
How to get your 3D microparticle position: A general and simple approach,
Proc. 19th MicroTAS, 25-29 October 2015, Gyeongju, Korea, pp. 1888-1890, CBMS, 2015


11. N. Nama, R. Barnkob, C. J. Kähler, F. Costanzo, and T. J. Huang,
Numerical analysis of particles undergoing acoustophoresis in a PDMS channel driven by surface acoustic waves,
Acoustofluidics 2014 conference, 11-12 September 2014, Monash University Prato Centre, Prato, Italy.


10. R. Barnkob, A. G. Marín, M. Rossi, and C. J. Kähler
Acoustophoretic particle motion in two-dimensional acoustic focusing in a square glass capillary,
Acoustofluidics 2014 conference, 11-12 September 2014, Monash University Prato Centre, Prato, Italy.

9. R. Barnkob, A. G. Marín, M. Rossi, and C. J. Kähler,
Single-particle microchannel acoustophoresis in a Hagen–Poiseuille flow,
Flow 14, 1st International Conference on MICRO & NANOFLUIDICS Fundamentals and Applications, 18-21 May 2014, University of Twente, The Netherlands

8. I. Iranmanesh, R. Barnkob, H. Bruus, and M. Wiklund,
Magnitude and variance of acoustic energy density in microchannel acoustophoresis: Comparison between single-frequency and frequency-modulated actuation,
Proc. 17th MicroTAS, 27-31 October 2013, Freiburg, Germany, pp. 1400-1402, CBMS, 2013

7. I. Iranmanesh,
R. Barnkob, H. Bruus, and M. Wiklund,
Tunable-angle wedge transducer for acoustophoresis analyzed by an in-situ light-intensity-based method,
2013 International Congress on Ultrasonics, 2-5 May 2013, Singapore.
R. W. B. Stephens Price Winner

6. P. Augustsson,
R. Barnkob, H. Bruus, C. J. Kähler, T. Laurell, Á. G. Márin, and M. Rossi,
Measuring the 3D motion of particles in microchannel acoustophoresis using astigmatism particle tracking velocimetry,
Proc. 16th MicroTAS, 28 October - 1 November 2012, Okinawa, Japan,
pp. 1480-1482, CBMS, 2012

5.
R. Barnkob, P. Augustsson, C. Magnusson, H. Lilja, T. Laurell, and H. Bruus,
Measuring density and compressibility of white blood cells and prostate cancer cells by microchannel acoustophoresis,
Proc. 15th MicroTAS, 2-6 October 2011, Seattle (WA), USA, pp. 127-129, CBMS, 2011

4. C. L. Ebbesen, J. D. Adams,
R. Barnkob, H.T. Soh, and H. Bruus,
Temperature-controlled high-throughput (1 L/H) acoustophoretic particle separation in microchannels,
Proc. 14th MicroTAS, 3-7 October 2010, Groningen, The Netherlands, pp. 728-730, CBMS, 2010

3.
R. Barnkob, P. Augustsson, T. Laurell, and H. Bruus,
An automated full-chip micro-PIV setup for measuring microchannel acoustophoresis: Simultaneous determination of forces from acoustic radiation and acoustic streaming, Proc. 14th MicroTAS, 3-7 October 2010, Groningen, The Netherlands, pp. 1247-1249, CBMS, 2010

2. P. Augustsson,
R. Barnkob, C. Grenvall, T. Deierborg, P. Brundin, H. Bruus and T. Laurell,
Measuring the acoustophoretic contrast factor of living cells in microchannels,
Proc. 14th MicroTAS, 3-7 October 2010, Groningen, The Netherlands, pp. 1337-1339, CBMS, 2010

1.
R. Barnkob and H. Bruus,
Acoustofluidics: theory and simulation of radiation forces at ultrasound resonances in microfluidics devices,
ASA 2009, Acoustical Society of America, 157th Meeting, 18-22 May 2009, Portland, Oregon, USA

Theses

3. R. Barnkob,
Physics of microparticle acoustophoresis - Bridging theory and experiment,
PhD thesis, DTU Nanotech, August 2012, 214 pages (pdf), Supervisor: Prof. Henrik Bruus

2. R. Barnkob,
Acoustofluidics in microsystems: investigation of resonances,
MSc thesis, DTU Nanotech, June 2009, 138 pages (pdf), Supervisor: Prof. Henrik Bruus

1. R. Barnkob and Mathias Bækbo Andersen,
Classical molecular dynamics - Lifetime of vibrations,
BSc thesis, DTU Nanotech, June 2006, 63 pages (
pdf), Supervisors: Magnus Paulsson and Thomas Frederiksen