A5100359160- Micro and Nano Robotics
- Modular Robots and Swarm Intelligence
- Advanced Sensor and Energy Harvesting Materials
- Hearing Loss and Rehabilitation
- Advanced Materials and Mechanics
- Hearing, Cochlea, Tinnitus, Genetics
- Acoustic Wave Phenomena Research
- Acoustic Wave Resonator Technologies
- Innovative Energy Harvesting Technologies
- Molecular Communication and Nanonetworks
- Soft Robotics and Applications
- Advanced MEMS and NEMS Technologies
- 3D Printing in Biomedical Research
- GaN-based semiconductor devices and materials
- Ear Surgery and Otitis Media
- Electrohydrodynamics and Fluid Dynamics
- Adhesion, Friction, and Surface Interactions
- Wireless Body Area Networks
- Opinion Dynamics and Social Influence
- Laser Material Processing Techniques
- ZnO doping and properties
- Tactile and Sensory Interactions
- Microfluidic and Bio-sensing Technologies
- Characterization and Applications of Magnetic Nanoparticles
- Complex Network Analysis Techniques
Korea Advanced Institute of Science and Technology
2020
Daegu Gyeongbuk Institute of Science and Technology
2011-2019
ETH Zurich
2018-2019
Chinese University of Hong Kong
2018
Samsung (South Korea)
2013-2014
Magnetically manipulated microrobots are demonstrated for targeted cell transportation. Full three-dimensional (3D) porous structures fabricated with an SU-8 photoresist using a 3D laser lithography system. Nickel and titanium deposited as magnetic material biocompatible material, respectively. The controlled in the fluid by external fields. Human embryonic kidney 239 (HEK 239) cells cultivated microrobot to show possibility
Magnetic microrobots developed for 3D culture and precise delivery of cells were successfully controlled in various environments.
Abstract Magnetically actuated ciliary microrobots were designed, fabricated and manipulated to mimic cilia-based microorganisms such as paramecia. Full three-dimensional (3D) microrobot structures using 3D laser lithography form a polymer base structure. A nickel/titanium bilayer was sputtered onto the cilia part of ensure magnetic actuation biocompatibility. The by an electromagnetic coil system, which generated stepping field actuate with non-reciprocal motion. beating motion produced net...
Abstract The development of 3D soft‐robotic components is currently hindered by material limitations associated with conventional printing techniques. To overcome this challenge, an indirect approach based on the fabrication printed sacrificial templates proposed. High‐resolution micromolds produced direct laser writing are infused polymers and then dissolved, leading to final soft microstructures. This method used indirectly print 4D microrobots. versatility technique shown through...
Abstract Biocompatibility and high responsiveness to magnetic fields are fundamental requisites translate small‐scale robots into clinical applications. The element iron exhibits the highest saturation magnetization susceptibility while exhibiting excellent biocompatibility characteristics. Here, a process reliably fabricate microrobots by means of template‐assisted electrodeposition in 3D‐printed micromolds is presented. 3D molds fabricated using modified two‐photon absorption...
Intravascular microrobots have emerged as a promising tool for vascular diseases. They can be wirelessly and precisely manipulated with high degree of freedom. Previous studies evaluated their drilling performance locomotion, showed the feasibility using biomedical applications in two-dimensional space. However, it is critical to validate micro-drillers three-dimensional (3D) environment because gravity plays an important role 3D significantly affects networks. In this work, we fabricated...
A new design methodology and fabrication process for two-dimensional (2D) piezoelectric micromachined ultrasonic transducer (pMUT) arrays using a top-crossover-to-bottom (TCTB) structure was developed. Individual sensing actuation of pMUT elements from small number connection lines enabled by the TCTB structure, parasitic coupling capacitance array significantly reduced as result. 32 × with fabricated, resulting in 64 over an area 4.8 mm2. The top electrodes each element were re-connected...
Abstract A silicon carbonitride (SICN) ceramic microrobot, biocompatible and magnetically activable, is developed for the delivery of viable cells to defective tissue by sequential steps microstructuring, magnetization, cell loading. The carrier porous cylindrical framework fabricated 3D laser lithography using a photocurable preceramic polymer, chemically modified polyvinylsilazane, subsequent pyrolysis at 600 °C under an inert atmosphere. Magnetic nanoparticles (MNP) are integrated into...
Recently, achieving flexible and highly efficient light‐emitting elements is the most noticeable demand for lighting or displays. Here, fully gallium nitride (GaN) diodes (LEDs) are demonstrated based on a unique transfer method. The LED structure consisting of GaN pyramid arrays first fabricated an amorphous glass‐based template with low‐temperature nitride/titanium (LT‐GaN/Ti) hetero‐interface, then released embedded into stretchable substrate using specialized interface control. Nanovoids...
The study presented in this paper assessed the frequency selectivity of an artificial basilar membrane (ABM) constructed using a piezoelectric beam array with narrow supports. Three ABM samples were constructed. Each contained 16 beams various lengths one-dimensional array. To experimentally assess ABM, mechanical vibration induced either by electrical or acoustic stimulus was measured scanning laser-Doppler vibrometer. electro-mechanical and acousto-mechanical transfer functions defined for...
Abstract In cochlear implants, the electrode insertion trauma during surgery can cause damage residual hearing. Preserving hearing is an important challenge and localized administration of drugs, such as steroids, one most promising ways, but remains a challenge. Here, microscaffold array (MiSCEA) consisting microfabricated flexible 3D for steroid reservoir reported. The MiSCEA without loaded drug tested by measuring electrically evoked auditory brainstem response cochlea in guinea pigs ( n...
Here, we develop a flexible microrobot enhancing the steerability of conventional guidewire. To improve steerability, is attached to tip guidewire and guided using an external magnetic field generated by electromagnetic coil system. The fabricated via replica-molding features body made polydimethylsiloxane (PDMS) single permanent magnet. As robot deformable material, it can be steered low-intensity field; potentially into coronary artery. study steering performance, employed mathematical...
Various microrobots are being studied for potential biomedical applications including targeted cell transportation, precise drug delivery, opening blocked blood vessels, micro-surgery, sensing, and scaffolding. Precise magnetic field control system is a coil wireless of those personalized minimally invasive treatments. The possible fabricated by micro-electro-mechanical systems (MEMS) nano-electro-mechanical (NEMS) technologies. In this review, fabrication technologies scaffold ciliary will...
A capsule-type microrobot exhibits “Pick-and-Drop” (P&D) motion for possible drug and cell transport via a corkscrew motion. Drugs or cells can be encapsulated in the microrobot's container by P&D attached to surface of cap, which used as supporting structure. This work is discussed article number 1700985 Hongsoo Choi co-workers.
A flexible microrobots for medical tool to treat various vascular diseases have been developed accurate manipulation. The proposed cylindrical were fabricated using a negative mold method by elastomer, Polydimethylsiloxane (PDMS), deformability and flexibility. Steering of the realized 15 mT external magnetic field which is less than previously reported researches. Deflection angle about 140 degree application 160 direction with respect primary axis in initial state. This research proposing...
Fully flexible GaN-LEDs emitting bright green or blue light are demonstrated by J. H. Choi, M. Kim, and co-workers on page 267. The LEDs have an embedded architecture consisting of hard GaN light-emitting arrays in a soft polymer matrix. This is enabled accurately reducing the adhesion strength LT-GaN/Ti hetero-interface via nanovoid formation, transferring stack into ultrathin, substrates.
Theories suggest that ancient Egyptians believed the bones of gods were made iron. Indeed, iron has been suggested as a key material in implantable biodegradable medical devices. In article number 1805006, Sangwon Kim, Bradley J. Nelson, Salvador Pané, and co-workers describe how to manufacture three-dimensional fully magnetic microrobots for biomedical applications using two-photon polymerization electrodeposition.
In article number 1900739 by Hongsoo Choi, Dong-Pyo Kim, and co-workers, biocompatible ceramic microrobots are developed for cell delivery the first time. The fabricated 3D laser lithography, magnetic nanoparticles immobilized on surface of to manipulate movement an external field.