Publications

Journal Publications

[36]  D. Zheng, W.J. Jung, S.H. Lee, Y. Ma, J.W. Park, and Y.H. Hwang, “Jamming-induced stiffness modulation using 3D-printed hexagonal microfibers in cylindrical structures,” Materials and Design, Vol.255, p.114174, May.31, 2025, DOI: doi.org/10.1016/j.matdes.2025.114174. 

[35] M. Hilal, Y. Ali, Z. Cai, H.J. Kim, H. Abdo, I. Alnaser, and Y.H. Hwang, “3D flower-like Co3O4@ZnO nanostructures for trace-level acetone detection at low operating temperatures,” Sensors and Actuators: A., Vol.388, p.116479, Mar.20, 2025, DOI: doi.org/10.1016/j.sna.2025.116479. 

[34]  M. Hilal, Y. Ali, Z. Cai, H.J. Kim, H. Abdo, I. Alnaser, Y.H. Hwang, and J.I. Han, “Fabrication of electrochemically stable 3D V2O5/Nickel foam electrode with enhanced photoelectrochemical activity for high-performance glucose sensing,” Surfaces and Interfaces, Vol.60, p. 106097, Feb.22, 2025, DOI: doi.org/10.1016/j.surfin.2025.106097.

[33] M. Hilal, Y. Ali, Z. Cai, H.J. Kim, H. Abdo, I. Alnaser, Y.H. Hwang, and J.I. Han, “Synergistic MXene@NiO-ZnO Heterostructures via Dual-Pressure Hydrothermal Synthesis for High-Performance Photoelectrochemical Glucose Sensing,” Ceramics International, Vol.51, pp. 16246–16256, Jan.27, 2025, DOI: 10.1016/j.ceramint.2025.01.465.

[32] H. Yuan, M. Hilal, Y. Ali, H. Ayub, Z. Cai, H.J. Kim, W. Zhang, A. Khan, H. Abdo, I. Alnaser, Y.H. Hwang, and J.I. Han, “Synergistic charge transfer in 3D-V2O5/1D-Co3O4 composite for ultra-sensitive NO2 gas detection,” Surfaces and Interfaces, Vol.58, p.105888, Jan.21, 2025, DOI: 10.1016/j.surfin.2025.105888.

[31] W.J. Jung, S.H. Lee, D. Zheng, M. Hilal, and Y.H. Hwang, “Whisker Sensor with Extended Measurement Range Through Jamming Effects Using 3D-Printed Tetrapod Particles,” Journal of Microelectromechanical Systems, Vol.33, No.6, pp.758-766, Dec.3, 2024, DOI: 10.1109/JMEMS.2024.3474010.

[30] S.H. Lee, Y.H. Ma, W.J. Jung, C.W. Lee, and Y.H. Hwang, “PDMS micro check valve with 3D valve disk for reducing fluid resistance,” Journal of Micromechanics and Microengineering, Vol.34, No.8, p. 085009, Jul.18, 2024, DOI: 10.1088/1361-6439/ad60d2. 

[29] M. Hilal, W.C. Yang, Y.H. Hwang, W. Xie, “Tailoring MXene Thickness and Functionalization for Enhanced Room‐Temperature Trace NO2 Sensing,” Nano-Micro Letters, Vol.16, p.84, Jan.12, 2024, DOI: 10.1007/s40820-023-01316-x. 

[28] M.Hilal, S.H. Lee, and Y.H. Hwang, “Facial preparation of electrochemically stable NiO/ZnO hybrid electrode exhibiting excellent redox activity for enhanced glucose detection,” Surfaces and Interfaces, Vol.43(B), p.103589, Nov.3, 2023, DOI: 10.1016/j.surfin.2023.103589.

[27] S.H. Lee, I.S. Her, W.J. Jung, and Y.H. Hwang, “Snakeskin-Inspired 3D Printable Soft Robot Composed of Multi-Modular Vacuum-Powered Actuators,” Actuators, Vol.12(2), p. 62, Jan.31, 2023, DOI: 10.3390/act12020062. 

[26] W.J. Jung, S.H. Lee and Y.H. Hwang, “Wireless Inchworm-like Compact Soft Robot by Induction Heating of Magnetic Composite,” Micromachines, Vol.14(1), p.162, Jan.8, 2023, DOI: 10.3390/mi14010162 . 

[25] S.H. Lee, W.J. Jung, K.H. Ko, Y.H. Hwang, “Wireless Micro Soft Actuator without Payloads Using 3D Helical Coils,” Micromachines, Vol.13(5), p.799, May.20, 2022, DOI: 10.3390/mi13050799.  

[24] W.J. Jung, S.H. Lee and Y.H. Hwang, “Truly 3D Microfluidic Heating System with Iterative Structure of Coil Heaters and Fluidic Channels,” Smart Materials and Structures, Vol.31 (3), p.035016, Feb.4, 2022, DOI: 10.1088/1361-665X/ac4e50. 

[23] C.J. Lee, Y.S. Cho, W.J. Jung, J.M. Lee and Y.H. Hwang, “Droplet generation with integrated 3D pneumatic actuator for orifice control,” Journal of Mechanical Science and Technology, Vol.36 (1), pp.333-340, Jan.1, 2022, DOI: 10.1007/s12206-021-1232-6.

[22] S.B. Ahn, W.J. Jung, K.H. Ko, Y.C. Lee, C.J. Lee and Y.H. Hwang, “Thermopneumatic soft micro bellows actuator for standalone operation,” Micromachines, Vol.12(1), p.46, Jan.1, 2021, DOI: 10.3390/mi12010046.

[21] W.J. Jung, Y. Kang, S.O. Han and Y.H. Hwang, “Biocompatible micro, soft bellow actuator rapidly manufactured using 3D-printed soluble mold,” Journal of Micromechanics and Microengineering, Vol.29, p.125005, Oct.14, 2019, DOI: 10.1088/1361-6439/ab477f.

[20] D Seo, S Oh, S Shin, M Lee, Y.H Hwang, S Seo, "Smartphone compatible on-site fluorescence analyzer for spilled crude oil based on CMOS image sensor," Sensors and Actuators B, Vol.289, pp.93-99, Jun.15, 2019, DOI: 10.1016/j.snb.2019.03.086.

[19] K. Kang, S. Oh, H. Yi, S Han, and Y.H. Hwang, “Fabrication of truly 3D microfluidic  using 3D-printed soluble mold,” Biomicrofluidics, Vol.12, No.1, 014105, Jan.5, 2018, DOI: 10.1063/1.5012548.

[18] D. Seo, S. Oh, M. Lee, Y.H. Hwang, and S. Seo, “A field-portable cell analyzer without a microscope and reagents,” Sensors, Vol.18, Issue1, 85, Dec.29, 2017, DOI:10.3390/s18010085.

[17] Y.H. Hwang, and R. Candler, “Non-planar PDMS microfluidic channels and actuators: a review,” Lab on a Chip, Vol.17, Issue 23, pp.3948–3959, Dec.7, 2017, DOI: 10.1039/C7LC00523G.

[16] H. Sohn, C. Liang, M. Nowakowski, Y.H. Hwang, S. Han, J. Bokor, G. Carman, and R. Candler, “Deterministic multi-step rotation of magnetic single-domain state in Nickel nanodisks using multiferroic magnetoelastic couplin,” Journal of Magnetism and Magnetic Materials, Vol.439, pp.196–202, Oct.1, 2017, DOI: 10.1016/j.jmmm.2017.04.077.

[15] Y.H. Hwang, D.M. Seo, M. Roy, E. Han, R.N. Candler, and S.K. Seo, “Capillary flow in PDMS cylindrical microfluidic channel using 3D printed mold,” Journal of Microelectromechanical Systems, Vol.25, No.2, pp.238-240, Mar.31, 2016, DOI: 10.1109/JMEMS.2016.2521858.

[14] M. Roy, G.S. Jin, J.H. Pan, D.M. Seo, Y.H. Hwang, S.W. Oh, M. Lee, Y.J. Kim, and S.K. Seo, ‘Staining-free cell viability measurement technique using lens-free shadow imaging platform’, Sensors and Actuators B: Chemical, Vol.224, pp.577-583, Oct.30, 2015, DOI: 10.1016/j.snb.2015.10.097.

[13] Y.H. Hwang, O. Paydar, and R.N. Candler, “Pneumatic microfinger with balloon fins for linear motion using 3D printed molds,” Sensors and Actuators A: Physical, Vol.234, pp.65-71, Oct.1, 2015, DOI:10.1016/j.sna.2015.08.008.

[12] Y.H. Hwang, O. Paydar, and R.N. Candler, “3D printed molds for non-planar PDMS microfluidic channels,” Sensors and Actuators A: Physical, Vol.226, pp.137-142, May 1, 2015, DOI: 10.1016/j.sna.2015.02.028 .

[11] J. Harrison, Y.H. Hwang, O. Paydar, J. Wu, E. Threlkeld, J. Rosenzweig, P. Musumeci, and R. Candler, “High-gradient microelectromechanical system quadrupole electromagnets for particle beam focusing and steering,” Physical Review Special Topics-Accelerators and Beams, Vol.18, Issue 2, pp.023501-1, Feb.17, 2015, DOI: http://dx.doi.org/10.1103/PhysRevSTAB.18.023501.

[10] Y.H. Hwang, O.H. Paydar, M. Ho, J. B. Rosenzweig, and R.N. Candler, “Electrochemical macroporous silicon etching with current compensation,” Electronics Letters, Vol.50, No.19, pp.1373-1375, Sep.11, 2014, DOI: 10.1049/el.2014.1662.

[9] J. Harrison, O.Paydar, Y.H. Hwang, J. Wu, E. Threlkeld, P. Musumeci, and R.N. Candler, “Fabrication process for thick-film micromachined multi-pole electromagnets,” Journal of Microelectromechanical Systems, Vol.23, No.3, pp.505-507, May 29, 2014, DOI: 10.1109/JMEMS.2014.2315763.

[8] O.H. Paydar, C.N. Paredes, Y.H. Hwang, J. Paz, N.B. Shah, and R.N. Candler, “Characterization of 3D-printed microfluidic chip interconnects with integrated o-rings,” Sensors and Actuators A:Physical, Vol.205, pp.199-203, Jan.1, 2014, DOI: 10.1016/j.sna.2013.11.005.

[7] Y.H. Hwang, A. Phan, K. Galatsis, O.M. Yaghi, and R.N. Candler, “Zeolitic imidazolate framework-coupled resonators for enhanced gas detection,” Journal of Micromechanics and Microengineering, Vol.23, No.12, p.125027, Nov.14, 2013, DOI:10.1088/0960-1317/23/12/125027.

[6] Y.H. Hwang, H. Sohn, A. Phan, O.M. Yaghi, and R.N. Candler, “Dielectrophoresis-assembled zeolitic imidazolate framework nanoparticle-coupled resonators for highly sensitive and selective gas detection,” Nanoletters, Vol.13, Issue 11, pp.5271-5276, Oct.7, 2013, DOI: 10.1021/nl4027692.

[5] Y.H. Hwang, and Rob N. Candler, “Fabrication process for integrating nanoparticles with released structures using photoresist replacement of sublimated p-dichlorobenzene for temporary support,” Journal of Microelectromechanical Systems, Vol.21, No.6, pp.1282-1284, Nov.27, 2012, DOI: 10.1109/JMEMS.2012.2221160 .

[4] Y.H. Hwang, F. Gao, A.J. Hong, and R.N. Candler, “Porous silicon resonators for improved vapor detection,” Journal of Microelectromechanical Systems, Vol.21, No.1, pp.235-242, Feb.3, 2012, DOI: 10.1109/JMEMS.2011.2170819.

[3] S.M. Kim, E.B. Song, S. Seo, D.H. Seo, Y.H. Hwang, R. Candler, and K.L. Wang, “Suspended few-layer graphene beam electromechanical switch with abrupt on-off characteristics and minimal leakage current,” Applied Physics Letters, Vol.99, Issue 2, pp.023103, Jul.13, 2011, DOI: 10.1063/1.3610571.

[2] J.Y. Kim, A.J. Hong, S.M. Kim, K.S. Shin, E.B. Song, Y.H. Hwang, F. Xiu, K. Galatsis, C.O. Chui, R.N. Candler, S.Y. Choi, J.T. Moon, and K.L.Wang, “A stacked memory device on logic 3D technology for ultra high density data storage,” Nanotechnology, Vol.22, Issue 25, pp.254006-1, May 16, 2011, DOI: 10.1088/0957-4484/22/25/254006.

[1] Y.H. Hwang, S.O. Han, B.K. Lee, J.S. Kim, and J. Pak, "A two-step micromirror for low voltage operation," KIEE International Transactions on Electrophysics and Application, Vol.5-C, No.6, pp.270-275, Dec., 2005.

Conference Publications

[39] S.H. Lee, S.H. Lee, W.J. Jung, Y. Ma, D. Zheng, J.W. Park, and Y.H. Hwang, " Predictive Framework for the Optimization of Soft Bending Actuators," in Proc. IEEE Region 10 Symposium, p.3.04, Jul. 2025. 

[38] W.J. Jung, S.H. Lee, Y.H. Hwang, and J.W. Park, "3D Printed Hexagonal Microfiber Jamming Structure for Variable Stiffness," in Proc. Annual Spring Meeting of The Korean BioChip Society, p.357, p.122, May 2025.

[37] W.J. Jung, D.Y. Zheng, H.I. Hwangbo, K.H. Yu, and Y.H. Hwang, "High-stiffness layer jamming through 3d-printed micro-patterns," in Proc. The Korean BioChip Society Conference, p.122, Nov. 2024.

[36] Y.H. Ma, S.H. Lee, S.H. Lee, S.M. Jang, S.M. Yoo, and Y.H. Hwang, "Predictive framework for optimization of soft bending actuators using machine learning," in Proc. The Korean BioChip Society Conference, p.317, Nov. 2024.

[35] D.H. Ham, J.S. Choi, W.J. Jung, S.H. Lee, Y.H. Hwang, and W.T. Park, “Thrombosis Analysis System Using Actuator-Based Stenosis,” in Proc. International Conference on Solid State Device and Materials (SSDM 2024), p.SO-PS-07, Sep. 2024.

[34] W.J. Jung, S.H. Lee, D.Y. Zheng, C.W. Lee, and Y.H. Hwang, “A whisker sensor with a tetrapod particle-infused jamming actuator for extensive measurement range,” in Proc. The 2024 9th International Conference on Integrated Circuits, Design and Verification (IEEE ICDV 2024), p. 1571003143, Jun. 2024. 

[33] S.H. Lee, W.J. Jung, Y.H. Ma, Y.B. Shin, and Y.H. Hwang, “Flexible and Expandable RF Coil System with Soft Actuators for Deep Organ Imaging in MRI,” in Proc. The 2024 9th International Conference on Integrated Circuits, Design and Verification (IEEE ICDV 2024), p. 1571003131, Jun. 2024.

[32] Y.H. Ma, S.H. Lee, D.Y. Zheng, C.W. Lee, Y.B. Shin, and Y.H. Hwang, “Enhanced Backflow Prevention in Microfluidic Check Valve through 3D Dome-shaped Valve Disk,” in Proc. The 26th Korean MEMS Conference (KMEMS 2024), p.TP-2-57, Mar. 2024.

[31] M. Hilal, S.H. Lee, and Y.H. Hwang, “Non-Invasive Glucose Sensing with Electrochemically Stable NiO/ZnO Hybrid Electrode,” in Proc. The IEEE 16th international Conference on Nano/Molecular Medicine & Engineering (IEEE-Nanomed), p.85, Dec. 2023. 

[30]  W.J. Jung, S.H. Lee, and Y.H. Hwang, “Wireless Crawling of Inchworm-Like Robot by Induction Heating,” in Proc. The 22nd International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers 2023), p.907-910, Jun 2023.  

[29]  W.J. Jung, S.H. Lee, I.S. Her, and Y.H. Hwang, “Mxene hydrogel whisker sensor with built-in pneumatic actuators for expandable sensing range,” in Proc. The 18th Internatioal Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS 2023), p.103, May 2023 . 

[28]  S.H. Lee, W.J. Jung, S.K. Kim, H.J. Son, Y.H. Hwang, and S.O. Kang, “405nm and 450nm Light-Responsive Germicidal Colorimetric Sensor,” in Proc. The Korean BioChip Society Conference, p.218, Nov 2022. 

[27]  S.H. Lee, W.J. Jung, S.B. Ahn, I.S. Her, and Y.H. Hwang, “Wireless Micro Soft Crawling Robot Using Inductive Heating of Magnetic Nanoparticles,” in Proc. The Korean BioChip Society Conference, p.275, May 2022. 

[26] W.J. Jung, S.H. Lee, J.M. Lee, and Y.H. Hwang, “Wirelessly Powered Micro Soft Bellows Actuator with 3D Helix Coils,” in Proc. The 35th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp.361-364, Jan. 2022. 

[25] C.J. Lee, W.J. Jung, Y.C Lee, Y.S. Cho, S.H Lee, and Y.H. Hwang, “Micro droplet size changes depending on protruding tip of 3D circular channel,” in Proc. The 23rd Korean Micro Electro Mechanical Systems Conference (KMEMS 2021), p.FP-4-20, 2021.

 [24] W.J. Jung, S.K. Seo, and Y.H. Hwang, “Enhanced heat transfer of 3D coiled micro heater and fluidic channel,” in Proc. The 22th Korean Micro Electro Mechanical Systems Conference (KMEMS 2020), p.TP-2-05, 2020.

 [23] S.B. Ahn and Y.H. Hwang, “Thermo-pneumatic Micro Bellow Actuator using 3D Printed Soluble Mold,” in Proc. The 22th Korean Micro Electro Mechanical Systems Conference (KMEMS 2020), p.FP-4-28, 2020.

 [22] S.W. Oh, W.J Jung, and Y.H. Hwang, “Fully 3D Micro, Biocompatible, Soft actuator Using 3D-Printed Soluble Mold,” in Proc. The 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, p.S85, 2019.

 [21] Y.H. Hwang, D. Seo, M. Roy, J. Kim, K. Ann, E. Han, S. Oh, and S. Seo, “PDMS cylindrical microfluidic channel using 3D printed mold,” in Proc. The 18TH Korean Micro Electro Mechanical Systems Conference (KMEMS 2016), p.78, 2016.

 [20] M. Roy, D.M. Seo, Y.H. Hwang, J.W. Kim, K.Y. Ann, Y.H. Kwak, S.K. Seo, S.W. Oh, M.J. Lee, “Lens-free automated cell detection system for telemedicine application, “ in Proc. IEEE Sensors, pp. 972-974, 2015.

 [19] D.M. Seo, M. Roy, J.W. Kim, K.Y. Ann, Y.H. Hwang, Y.H. Kwak, S.W. Oh, M.J. Lee, J.W. Lee, S.K. Seo, “High-throughput and real-time microalgae monitoring platform using lens-free shadow imaging system (LSIS),” in Proc. IEEE Sensors, pp. 1630-1632, 2015.

 [18] R. Candler and Y.H. Hwang, “ZIF-coupled resonant sensors,” IEEE International Frequency Control Symposium and European Frequency and Time Forum, 2015 (Invited talk, no proceedings).

 [17] J. Lake, Y.H. Hwang, E. Ng, C. Ahn, V. Hong, Y. Yang, Y. Dai, and R. Candler, “Experimental validation of 3d intuitive modeling approach for anchor loss in MEMS resonators,” in Proc. A Solid-State Sensors, Actuators and Microsystems Workshop (Hilton Head 2014), pp.277-280, 2014.

 [16] J. Harrison, J. Wu, O. Paydar, Y.H. Hwang, E. Threlkeld, J. Rosenzweig, P. Musumeci, and R. Candler, “High-gradient MEMS electromagnets for particle beam manipulation,” in Proc. A Solid-State Sensors, Actuators and Microsystems Workshop (Hilton Head 2014), pp.60-63, 2014.

 [15] J. Harrison, A. Joshi, Y.H. Hwang, O. Paydar, J. Lake, P. Musumeci, and R.N. Candler, “Surface-micromachined electromagnets for 100 μm-scale undulators and focusing optics,” in Proc. Physics and Applications of High Brightness Beams Workshop (HBEB 2013), pp.19-26, 2013.

 [14] Y.H. Hwang, A. Phan, K. Galatsis, O.M. Yaghi, and R.N. Candler, “ZIF-coupled microresonator for highly sensitive and selective gas detection,” in Proc. International Conference on Miniaturized Systems for Chemistry and Life Science (MicroTAS 2012), pp.231-233, 2012.

 [13] Y.H. Hwang, S.M. Kim, and R.N. Candler, “Receptor-coated porous silicon resonators for enhanced sensitivity of vapor detection,” in Proc. IEEE International Frequency Control Symposium and European Frequency and Time Forum, p.922-925, 2011.

 [12] Y.H. Hwang, F. Gao, and R.N. Candler, “Porous silicon resonator for sensitive vapor detection,” in Proc. A Solid-State Sensors, Actuators and Microsystems Workshop (Hilton Head 2010), pp.150-153, 2010.

 [11] R.N. Candler, Y.H. Hwang, and F. Gao, “Sensitivity enhancement of vapor sensors with porous silicon resonant structures,” SPIE Defense, Security and Sensing, Vol.7679, p.76790K, 2010 (Invited paper).

 [10] Y.H. Hwang, F. Gao, and R.N. Candler, “Porous silicon resonator for sensitive vapor detection,” in Proc. the 4th Nagoya University–UCLA International Symposium, p.22, 2009.

 [9] S.O. Han, Y.H. Hwang, J.S. Kim, J.S. Kim, and J. Pak, "A novel double-stacked electrostatic micromirror for low voltage operation," in Proc. 13th Korean Conference on Semiconductors, pp.235-236, 2006.

 [8] S.B. Shim, K.J. Lee, J.H. Lee, Y.H. Hwang, S.O. Han, J. H. Pak, S.E. Choi, T.D. Milster, and, J.S. Kim, "Preconditions for high speed confocal image acquisition With DMD Scanning," in Proc. Conf. Optical Society of Korea Summer Meeting, pp.39-40, 2006.

 [7] Y.H. Hwang, S.O. Han, B.K. Lee, J.S. Kim, and J. Pak, "A low voltage two-step micromirror for the pinhole of the confocal microscope," in Proc. Conf. IEEE/LEOS Optical MEMS, pp.49-50, 2005.

 [6] Y.H. Hwang, S.O. Han, B.K. Lee, J.S. Kim, and J. Pak, "Low voltage two-step micromirror for in-vivo endoscopic biopsy," in Proc. Conf. 7th Korean MEMS, pp.216-219, 2005.

 [5] B.K. Lee, S. Han, Y. H. Hwang, J.S. Kim, and J. Pak, "The manufacturing method of the safe Cr/Au pad which is insensible to an effect of the sacrificial layer etching," in Proc. Conf. 7th Korean MEMS, pp.433-436, 2005.

 [4] J.H. Chang, J.H. Son, Y.H. Hwang, B.K. Lee, S.K. Lee, and J. Pak, "Characteristics of epinephrine incorporation and release using polypyrrole(dodecylbenzene sulfonate) electrode," in Proc. Int. Conf. Electrical Engineering, p.A-151, 2005.

 [3] S.W. Oh, S.O. Han, S.B. Kim, Y.H. Hwang, S.W. Ha, and J. Pak, "A study on side stability improvement of a comb actuator using sawtooth-type comb fingers," in Proc. Conf. 6th Korean MEMS, pp.101-107, 2004.

 [2] B.K. Lee, Y.H. Hwang, J. Pak, and K.J. Lee, "Surface treatment of multy electrode array for enhancement of neural signal," in Proc. KIEEME Fall Conf., Vol. l7, pp.481-484, 2004.

 [1] J.H. Chang, J.H. Son, D.B. Kim, J. Kim, Y.H. Hwang, S.K. Lee, and J.H. Pak, "Doping and releasing characteristics of epinephrine using polypyrrole electrode," in Proc. KIEE Conf., pp.2140-2142, 2004.