https://scholar.dgist.ac.kr/handle/20.500.11750/60279 2026-09-09T13:38:03Z 2026-09-09T13:38:03Z Ye Hao Llacer-wintle Joaquin Sevim Semih Zhang Elric Von Arx Denis Hertle Lukas Accursi Martina Kim Minsoo Puigmarti-luis Josep Nelson Bradley J. Chen Xiang-zhong Pane Salvador https://scholar.dgist.ac.kr/handle/20.500.11750/60631 2026-08-20T02:40:16Z 2026-02-28T15:00:00Z

Title: Biocompatible Magnetopyroelectric Composite Films for Cell Stimulation Author(s): Ye Hao; Llacer-wintle Joaquin; Sevim Semih; Zhang Elric; Von Arx Denis; Hertle Lukas; Accursi Martina; Kim Minsoo; Puigmarti-luis Josep; Nelson Bradley J.; Chen Xiang-zhong; Pane Salvador Abstract: Magnetoelectric materials, which generate electric fields in response to alternating magnetic stimulation, are increasingly recognized for their applications in neuromodulation, tissue engineering, wireless drug delivery, and cancer treatment. This study addresses the cytotoxicity concerns associated with heavy metals in traditional magnetoelectric composites by introducing a heat-mediated magnetoelectric approach utilizing biocompatible iron oxide nanoparticles and pyroelectric polymers, thereby enhancing biomedical safety. The nanoparticles were synthesized with controlled size and shape via thermal decomposition of iron oleate, employing an in situ temperature labeling technique that simplifies the synthesis process and ensures uniform particle formation. These nanoparticles, optimized for high heating efficiency, were combined with the pyroelectric polymer P(VDF-TrFE) to create composite films that exhibit a heat-mediated magnetoelectric effect. This effect involves an alternating magnetic field heating the nanoparticles, leading to reversible material depolarization and the generation of a pyroelectric current. We explored the magnetopyroelectric effect on cell differentiation, demonstrating excellent biocompatibility with neural progenitor cells and significant enhancement in neuronal differentiation, attributed to the synergistic effects of heat and electricity. The pro-differentiation mechanism of magnetopyroelectric stimulation involves phosphatidylinositol 3 kinase AKT pathway and calcium signaling. This heat-mediated magnetoelectric approach not only presents a potential for applications such as neuronal repair and targeted drug delivery but also provides a safer and more versatile alternative to conventional magnetoelectric materials.

2026-02-28T15:00:00Z Chowdhury, A. M. Masum Bulbul Gharamaleki, Nader Latifi Lee, Hakjoon Kim, Jin-Young Kim, Minsoo Vidal, Salvador Pane i Vidal Youn, Sung Won Choi, Hongsoo https://scholar.dgist.ac.kr/handle/20.500.11750/59397 2026-08-14T01:10:15Z 2025-03-31T15:00:00Z

Title: Dual Active Tilted Roller Actuation System (DATRAS) with an electromagnetic actuation system for vascular intervention Author(s): Chowdhury, A. M. Masum Bulbul; Gharamaleki, Nader Latifi; Lee, Hakjoon; Kim, Jin-Young; Kim, Minsoo; Vidal, Salvador Pane i Vidal; Youn, Sung Won; Choi, Hongsoo Abstract: This paper presents DATRAS (Dual Active Tilted Roller Actuation System), a compact robotic system for vascular interventions that integrates with electromagnetic actuation systems to enable complete teleoperation. DATRAS combines translation and rotation motion for intervention tools in a single module, simplifying design and control. The system also allows easy roller adjustment for various tool diameters and enables guidewire helical motion without additional components or specialized guidewires. Experimental validation using cerebrovascular and cardiovascular phantoms demonstrates DATRAS’s effectiveness in controlling magnetic tip guidewire motion when combined with electromagnetic actuation. Weighing just 320 g, this lightweight device aims to enhance interventional procedures by facilitating easy manipulation of instruments through teleoperation. The actuator addresses current limitations in robotic intervention systems, exhibiting a potential reduction in radiation exposure and ergonomic risks for medical professionals, ultimately improving the efficacy of vascular interventions.

2025-03-31T15:00:00Z Kim, Minsoo Kim, Donghoon Mirjolet, Mathieu Shepelin, Nick A. Lippert, Thomas Choi, Hongsoo Puigmarti-Luis, Josep Nelson, Bradley J. Chen, Xiang-Zhong Pane, Salvador https://scholar.dgist.ac.kr/handle/20.500.11750/57433 2026-05-08T06:10:18Z 2024-10-31T15:00:00Z

Title: Shape-Morphing in Oxide Ceramic Kirigami Nanomembranes Author(s): Kim, Minsoo; Kim, Donghoon; Mirjolet, Mathieu; Shepelin, Nick A.; Lippert, Thomas; Choi, Hongsoo; Puigmarti-Luis, Josep; Nelson, Bradley J.; Chen, Xiang-Zhong; Pane, Salvador Abstract: Interfacial strain engineering in ferroic nanomembranes can broaden the scope of ferroic nanomembrane assembly as well as facilitate the engineering of multiferroic-based devices with enhanced functionalities. Geometrical engineering in these material systems enables the realization of 3-D architectures with unconventional physical properties. Here, 3-D multiferroic architectures are introduced by incorporating barium titanate (BaTiO3, BTO) and cobalt ferrite (CoFe2O4, CFO) bilayer nanomembranes. Using photolithography and substrate etching techniques, complex 3-D microarchitectures including helices, arcs, and kirigami-inspired frames are developed. These 3-D architectures exhibit remarkable mechanical deformation capabilities, which can be attributed to the superelastic behavior of the membranes and geometric configurations. It is also demonstrated that dynamic shape reconfiguration of these nanomembrane architectures under electron beam exposure showcases their potential as electrically actuated microgrippers and for other micromechanical applications. This research highlights the versatility and promise of multi-dimensional ferroic nanomembrane architectures in the fields of micro actuation, soft robotics, and adaptive structures, paving the way for incorporating these architectures into stimulus-responsive materials and devices. © 2024 The Author(s). Advanced Materials published by Wiley-VCH GmbH.

2024-10-31T15:00:00Z Kim, Minsoo Kim, Donghoon Aktas, Buse Choi, Hongsoo Puigmartí-Luis, Josep Nelson, Bradley J. Pané, Salvador Chen, Xiang-Zhong https://scholar.dgist.ac.kr/handle/20.500.11750/46380 2026-04-30T18:01:03Z 2023-02-28T15:00:00Z

Title: Strain-Sensitive Flexible Magnetoelectric Ceramic Nanocomposites Author(s): Kim, Minsoo; Kim, Donghoon; Aktas, Buse; Choi, Hongsoo; Puigmartí-Luis, Josep; Nelson, Bradley J.; Pané, Salvador; Chen, Xiang-Zhong Abstract: Magnetoelectric (ME) oxide materials can convert magnetic input into electric output and vice versa, making them excellent candidates for advanced sensing, data storage, and communication. However, their application has been limited to rigid devices due to their brittle nature. Here, flexible ME oxide composite (BaTiO3/CoFe2O4) thin film nanostructures with distinct ME coupling coefficients are reported. In contrast to rigid bulk counterparts, these ceramic nanostructures display a flexible behavior after being released from the substrate, and can be transferred onto a stretchable substrate such as polydimethylsiloxane. These ceramic films possess high ME coefficients due to minimized clamping effect and preferred crystalline orientation, and exhibit reversibly tunable ME coupling via mechanical stretching thanks to their large elasticity (>4%). It is believed that the study can open up new avenues for integrating ceramic ME composites into micro-/nanoelectromechanical system and soft robotic devices. © 2023 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH.

2023-02-28T15:00:00Z