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135 Publications
2024 | Journal Article | LibreCat-ID: 51518
Aimiyekagbon, Osarenren Kennedy, Amelie Bender, Tobias Hemsel, and Walter Sextro. “Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions.” Electronics 13, no. 3 (2024). https://doi.org/10.3390/electronics13030521.
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2023 | Conference Abstract | LibreCat-ID: 47234
Sehlmeyer, Birte, Rebecca Kampmann, Claus Scheidemann, Tobias Hemsel, and Mathias Getzlaff. “Burst Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor Cells.” In Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM), edited by Deutsche Physikalische Gesellschaft e. V., 2023.
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2023 | Conference Abstract | LibreCat-ID: 47235
Kampmann, Rebecca, Birte Sehlmeyer, Claus Scheidemann, Tobias Hemsel, and Mathias Getzlaff. “Burst Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer Cells.” In Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM), edited by Deutsche Physikalische Gesellschaft e. V., 2023.
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2023 | Conference Abstract | LibreCat-ID: 51117
Scheidemann, Claus, Tobias Hemsel, Olga Friesen, Leander Claes, and Walter Sextro. “Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped Ceramics,” 2023.
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2023 | Conference Abstract | LibreCat-ID: 51118
Scheidemann, Claus, Tobias Hemsel, Olga Friesen, Leander Claes, and Walter Sextro. “Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped Ceramics,” 2023.
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2023 | Conference Abstract | LibreCat-ID: 51119
Scheidemann, Claus, Oliver Ernst Caspar Hagedorn, Tobias Hemsel, and Walter Sextro. “Experimental Investigation of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding Process,” 2023.
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2022 | Book Chapter | LibreCat-ID: 33500
Hemsel, Tobias, and Jens Twiefel. “Piezoelectric Ultrasonic Power Transducers.” In Reference Module in Materials Science and Materials Engineering. Elsevier, 2022. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.
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2022 | Conference Paper | LibreCat-ID: 30371
Hagedorn, Oliver Ernst Caspar, Marian Broll, Olaf Kirsch, Tobias Hemsel, and Walter Sextro. “Experimental Investigation of the Influence of Different Bond Tool Grooves on the Bond Quality for Ultrasonic Thick Wire Bonding.” In CIPS 2022 - 12th International Conference on Integrated Power Electronics Systems, 138–43. Berlin: VDE VERLAG GMBH, 2022.
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2022 | Conference Paper | LibreCat-ID: 34104
Scheidemann, Claus, Olaf Kirsch, Tobias Hemsel, and Walter Sextro. “Experimental Investigation of Multidimensional Ultrasonic Heavy Wire Bonding.” In 2022 IEEE 9th Electronics System-Integration Technology Conference (ESTC). IEEE, 2022. https://doi.org/10.1109/estc55720.2022.9939478.
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2022 | Report | LibreCat-ID: 52045
Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. Modellbasierte Ermittlung optimaler Prozessparameter für neuartige Ultraschallbondverbindungen. LibreCat University, 2022. https://doi.org/10.2314/KXP:1879655276.
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2021 | Journal Article | LibreCat-ID: 21436
Schemmel, Reinhard, Viktor Krieger, Tobias Hemsel, and Walter Sextro. “Co-Simulation of MATLAB and ANSYS for Ultrasonic Wire Bonding Process Optimization.” Microelectronics Reliability 119 (2021): 114077. https://doi.org/10.1016/j.microrel.2021.114077.
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2020 | Conference Paper | LibreCat-ID: 17355
Schemmel, Reinhard, Claus Scheidemann, Tobias Hemsel, Olaf Kirsch, and Walter Sextro. “Experimental Analysis and Modelling of Bond Formation in Ultrasonic Heavy Wire Bonding.” In CIPS 2020; 11th International Conference on Integrated Power Electronics Systems, 1–6, 2020.
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2020 | Conference Paper | LibreCat-ID: 17706
Schemmel, Reinhard, Viktor Krieger, Tobias Hemsel, and Walter Sextro. “Co-Simulation of MATLAB and ANSYS for Ultrasonic Wire Bonding Process Optimization.” In 2020 21st International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2020. https://doi.org/10.1109/eurosime48426.2020.9152679.
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2019 | Conference Paper | LibreCat-ID: 14852
Dunst, Paul, Peter Bornmann, Tobias Hemsel, Walter Littmann, and Walter Sextro. “Atomization of Fluids with Ultrasound.” In Conference Proceedings - The 4th Conference on MicroFluidic Handling Systems (MFHS2019), edited by Joost Lötters and Gerald Urban, 140–43. Enschede, The Netherlands, 2019.
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2019 | Conference Paper | LibreCat-ID: 15244
Hagedorn, Oliver Ernst Caspar, Daniel Pielsticker, Tobias Hemsel, and Walter Sextro. “Messung hochfrequenter In-Plane-Schwingungen mittels Laservibrometrie in räumlich eingeschränkten Umgebungen.” In 2. VDI-Fachtagung Schwingungen 2019. VDI Verlag GmbH · Düsseldorf 2019, 2019.
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2019 | Conference Paper | LibreCat-ID: 10258
Dunst, Paul, Tobias Hemsel, Peter Bornmann, Walter Littmann, and Walter Sextro. “Modellbasierte Und Experimentelle Charakterisierung von Intensiven Ultraschall-Stehwellenfeldern Für Die Zerstäubung Hochviskoser Flüssigkeiten.” In DAGA 2019, 2019.
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2019 | Journal Article | LibreCat-ID: 10334
Schemmel, Reinhard, Tobias Hemsel, Collin Dymel, Matthias Hunstig, Michael Brökelmann, and Walter Sextro. “Using Complex Multi-Dimensional Vibration Trajectories in Ultrasonic Bonding and Welding.” Sensors and Actuators A: Physical 295 (2019): 653–62. https://doi.org/10.1016/j.sna.2019.04.025.
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2018 | Journal Article | LibreCat-ID: 9990
Dunst, Paul, Peter Bornmann, Tobias Hemsel, Walter. Littmann, and Walter Sextro. “Vibration Assisted Dosing, Mixing and Transport of Dry Fine Powders.” ACTUATOR 2018; 16th International Conference on New Actuators, 2018, 142–45.
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2018 | Journal Article | LibreCat-ID: 9991
Dunst, Paul, Peter Bornmann, Tobias Hemsel, and Walter Sextro. “Vibration-Assisted Handling of Dry Fine Powders.” Actuators 2018, 7(2)., 2018, 1–11. https://doi.org/10.3390/act7020018.
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2018 | Conference Paper | LibreCat-ID: 9992
Dymel, Collin, Paul Eichwald, Reinhard Schemmel, Tobias Hemsel, Michael Brökelmann, Matthias Hunstig, and Walter Sextro. “Numerical and Statistical Investigation of Weld Formation in a Novel Two-Dimensional Copper-Copper Bonding Process.” In (Proceedings of 7th Electronics System-Integration Technology Conference, Dresden, Germany), 1–6, 2018.
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2018 | Conference Paper | LibreCat-ID: 9993
Dymel, Collin, Reinhard Schemmel, Tobias Hemsel, Walter Sextro, Michael Brökelmann, and Matthias Hunstig. “Experimental Investigations on the Impact of Bond Process Parameters in Two-Dimensional Ultrasonic Copper Bonding.” In (Proceedings of 8th Electronics IEEE CPMT Symposium Japan (ICSJ 2018), Kyoto, Japan), 41–44, 2018.
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2018 | Conference Paper | LibreCat-ID: 9998
Schemmel, Reinhard, Tobias Hemsel, and Walter Sextro. “Numerical and Experimental Investigations in Ultrasonic Heavy Wire Bonding.” In 6th European Conference on Computational Mechanics (ECCM 6), 1–12. Glasgow, UK, 2018.
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2017 | Journal Article | LibreCat-ID: 9972
Dunst, Paul, Tobias Hemsel, and Walter Sextro. “Analysis of Pipe Vibration in an Ultrasonic Powder Transportationsystem.” Elsevier Sensors and Actuators A 263 (2017): 733–36.
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2017 | Conference Paper | LibreCat-ID: 9978
Kimotho, James Kuria, Walter Sextro, and Tobias Hemsel. “Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing.” In IEEE Transactions on Reliability, 1–10, 2017. https://doi.org/10.1109/TR.2017.2710260.
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2017 | Conference Paper | LibreCat-ID: 9982
Schemmel, Reinhard, Tobias Hemsel, and Walter Sextro. “MoRFUS: Mobile Reinigungseinheit Für Förderketten Basierend Auf Ultraschall.” In 43. Deutsche Jahrestagung Für Akustik, 611–14. Kiel 2017, 2017.
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2016 | Conference Paper | LibreCat-ID: 9958
Dunst, Paul, Walter Sextro, Peter Bornmann, Tobias Hemsel, and Walter Littmann. “Transportation of Dry Fine Powders by Coordinated Friction Manipulation.” In PAMM Proc. Appl. Math. Mech. 16, 635–36. Braunschweig, 2016. https://doi.org/10.1002/pamm.201610306.
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2015 | Journal Article | LibreCat-ID: 9944
Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett, and Bajram Zeqiri. “Kavitationsdetektion Mittels Self-Sensing-Ultraschallwandler.” Tm - Technisches Messen 82, no. 2 (2015): 73–84. https://doi.org/10.1515/teme-2015-0017.
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2015 | Journal Article | LibreCat-ID: 9948
Kudo, Ryo, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Thick KNbO 3 Films Deposited by Ultrasonic-Assisted Hydrothermal Method.” Acoustical Science and Technology 36, no. 3 (2015): 262–64. https://doi.org/10.1250/ast.36.262.
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2014 | Conference Paper | LibreCat-ID: 9868
Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th, 1549–55, 2014. https://doi.org/10.1109/ECTC.2014.6897500.
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2014 | Conference Paper | LibreCat-ID: 9869
Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett, and Bajram Zeqiri. “Self-Sensing Ultrasound Transducer for Cavitation Detection.” In 2014 IEEE International Ultrasonics Symposium Proceedings, 663–66, 2014. https://doi.org/10.1109/ULTSYM.2014.0163.
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2014 | Journal Article | LibreCat-ID: 9874
Hemsel, Tobias, Peter Bornmann, Takeshi Morita, Christoph Sondermann-Wölke, and Walter Sextro. “Reliability Analysis of Ultrasonic Power Transducers.” Archive of Applied Mechanics, 2014, 1–7. https://doi.org/10.1007/s00419-014-0965-4.
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2014 | Journal Article | LibreCat-ID: 9876
Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Operation of Piezoelectric Inertia Motors: Experimental Validation.” Archive of Applied Mechanics, 2014, 1–9. https://doi.org/10.1007/s00419-014-0940-0.
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2014 | Journal Article | LibreCat-ID: 9878
Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On 61, no. 2 (2014): 225–30. https://doi.org/10.1109/TUFFC.2014.6722608.
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2013 | Journal Article | LibreCat-ID: 9794
Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro. “Increasing the Power of Piezoelectric Energy Harvesters by Magnetic Stiffening.” Journal of Intelligent Material Systems and Structures 24, no. 11 (2013): 1332–42. https://doi.org/10.1177/1045389X13483021.
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2013 | Journal Article | LibreCat-ID: 9795
Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro. “Enhanced Energy Harvesting Using Multiple Piezoelectric Elements: Theory and Experiments.” Sensors and Actuators A: Physical 200 (2013): 138–46. https://doi.org/10.1016/j.sna.2013.01.008.
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2013 | Conference Paper | LibreCat-ID: 9796
Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro. “Characteristics of Piezoelectric Energy Harvesters in Autonomous Systems.” In Proceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013, 159–61. Berichte Aus Dem IDS. Hannover, Germany, 2013.
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2013 | Conference Paper | LibreCat-ID: 9797
Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “A Friction Based Approach for Modeling Wire Bonding.” In IMAPS 2013, 46th International Symposium on Microelectronics. Orlando (Florida), USA, 2013. https://doi.org/10.4071/isom-2013-TA67.
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2013 | Conference Paper | LibreCat-ID: 9801
Hunstig, Matthias, Waleed Al-Ashtari, Tobias Hemsel, and Walter Sextro. “Leistungs- Und Bandbreitensteigerung von Energy-Harvesting-Generatoren Für Energieautarke Systeme.” In 9. Paderborner Workshop Entwurf Mechatronischer Systeme, edited by Jürgen Gausemeier, Roman Dumitrescu, Franz Rammig, Wilhelm Schäfer, and Ansgar Trächtler, 359–72. HNI-Verlagsschriftenreihe. Paderborn: Heinz Nixdorf Institut, Universität Paderborn, 2013.
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2013 | Conference Paper | LibreCat-ID: 9802
Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Slip-Slip Operation of Piezoelectric Inertia Motors - Experimental Validation.” In Proceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, 16–18. Hannover, Germany, 2013.
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2013 | Journal Article | LibreCat-ID: 9803
Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Modelling the Friction Contact in an Inertia Motor.” Journal of Intelligent Material Systems and Structures 24, no. 11 (2013): 1380–91. https://doi.org/10.1177/1045389X12474354.
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2013 | Journal Article | LibreCat-ID: 9804
Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Stick-Slip and Slip-Slip Operation of Piezoelectric Inertia Drives - Part II: Frequency-Limited Excitation.” Sensors and Actuators A: Physical 200 (2013): 79–89. https://doi.org/10.1016/j.sna.2012.11.043.
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2013 | Journal Article | LibreCat-ID: 9805
Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Stick-Slip and Slip-Slip Operation of Piezoelectric Inertia Drives - Part I: Ideal Excitation.” Sensors and Actuators A: Physical 200 (2013): 90–100. https://doi.org/10.1016/j.sna.2012.11.012.
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2013 | Special Issue | LibreCat-ID: 9863
Morita, Takeshi, Tobias Hemsel, T. Ijima, D. Y. Jeong, T. Kanda, Jens Twiefel, E. Uzgur, and M. Lallart, eds. Selected Papers from the 9th International Workshop on Piezoelectric Materials and Applications in Actuators. Sensors and Actuators A: Physical. Vol. 200. Elsevier, 2013. https://doi.org/10.1016/j.sna.2013.06.017.
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2013 | Journal Article | LibreCat-ID: 9866
Ohta, Kanako, Gaku Isobe, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Study on Optimizing Ultrasonic Irradiation Period for Thick Polycrystalline PZT Film by Hydrothermal Method.” Ultrasonics 53, no. 4 (2013): 837–41. https://doi.org/10.1016/j.ultras.2012.12.003.
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2013 | Journal Article | LibreCat-ID: 9867
Yokouchi, Yuriko, Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Piezoelectric Properties of CuO-Doped (K,Na)NbO3 Lead-Free Ceramics Synthesized with Hydrothermal Powders.” Japanese Journal of Applied Physics 52, no. 7S (2013). https://doi.org/10.7567/JJAP.52.07HB03.
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2012 | Journal Article | LibreCat-ID: 9781
Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro. “Frequency Tuning of Piezoelectric Energy Harvesters by Magnetic Force.” Smart Materials and Structures 21, no. 3 (2012): 035019.
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2012 | Journal Article | LibreCat-ID: 9782
Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro. “Analytical Determination of Characteristic Frequencies and Equivalent Circuit Parameters of a Piezoelectric Bimorph.” Journal of Intelligent Material Systems and Structures 23, no. 1 (2012): 15–23. https://doi.org/10.1177/1045389X11430742.
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2012 | Conference Paper | LibreCat-ID: 9783
Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.” In Ultrasonics Symposium (IUS), 2012 IEEE International, 1141–44, 2012. https://doi.org/10.1109/ULTSYM.2012.0284.
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2012 | Conference Paper | LibreCat-ID: 9785
Isobe, Gaku, Ryo Ageba, Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Synthesis of Piezoelectric Materials by Ultrasonic Assisted Hydrothermal Method.” In AIP Conference Proceedings, edited by Bogumil B. J. Linde, Jacek Paczkowski, and Nikodem Ponikwicki, 1433:569–72. AIP, 2012. https://doi.org/10.1063/1.3703251.
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2012 | Conference Paper | LibreCat-ID: 9788
Maeda, Takafumi, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Piezoelectric Applications of Hydrothermal Lead-Free (K0.48Na0.52)NbO3 Ceramics.” In Ultrasonics Symposium (IUS), 2012 IEEE International, 194–95, 2012. https://doi.org/10.1109/ULTSYM.2012.0048.
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