Publications

Journal articles:

  • M. A. Rahman, J. Cheng, Z. Wang, and A. T. Ohta, "Cooperative micromanipulation using the independent actuation of fifty microrobots in parallel," Scientific Reports, vol. 7, article number 3278, 2017. Link

  • Q. Fan, W. Hu, and A. T. Ohta, “Localized single-cell lysis and manipulation using optothermally induced bubbles,” Micromachines, vol. 8, no. 4, article number 121, 2017. Link

  • M. A. Rahman, W. A. Shiroma, and A. T. Ohta, “Liquid-metal capacitors with a 42:1 tuning ratio,” Electronics Letters, DOI: 10.1049/el.2017.0635, 2017.

  • M. R. Moorefield, R. C. Gough, A. M. Morishita, J. H. Dang, A. T. Ohta, and W. A. Shiroma, “Frequency-tunable patch antenna with liquid-metal-actuated loading slot,” Electronics Letters, vol. 52, no. 7, pp. 498-500, 2016.

  • R. C. Gough, J. H. Dang, M. R. Moorefield, G. B. Zhang, L. H. Hihara, W. A. Shiroma, and A. T. Ohta, “Self-actuation of liquid metal via redox reaction,” ACS Applied Materials & Interfaces, DOI: 10.1021/acsami.5b09466, 2016. Link

  • J. H. Dang, R. C. Gough, A. M. Morishita, A. T. Ohta, and W. A. Shiroma, "Liquid-metal-based reconfigurable components for RF front ends," IEEE Potentials, July/August 2015, pp. 24-30, 2015. Link

  • R. C. Gough, A. M. Morishita, J. H. Dang, M. R. Moorefield, W. A. Shiroma, and A. T. Ohta, "Rapid electrocapillary deformation of liquid metal with reversible shape retention," Micro and Nano Systems Letters, vol. 3, no 4, DOI: 10.1186/s40486-015-0017-z, 2015. Link

  • Q. Fan, W. Hu, and A. T. Ohta, "Efficient single-cell poration by microsecond laser pulses," Lab on a Chip, vol. 15, no. 2, pp. 581-588, 2015. Link

  • W. Hu, Q. Fan, and A. T. Ohta, "Interactive actuation of multiple optothermocapillary flow-addressed bubble microrobots," Robotics and Biomimetics, vol. 1, doi:10.1186/s40638-014-0014-3, 2014. Link

  • R. C. Gough, A. M. Morishita, J. H. Dang, W. Hu, W. A. Shiroma, and A. T. Ohta, "Continuous electrowetting of non-toxic liquid metal for RF applications," IEEE Access, vol. 2, pp. 874-882, 2014. Link

  • Q. Fan, W. Hu, and A. T. Ohta, "Laser-induced microbubble poration of localized single cells," Lab on a Chip, vol. 14, no. 9, pp. 1572-1578, 2014. PubMed: 24632785, NIHMSID: 573933. Link

  • A. M. Morishita, C. K. Y. Kitamura, A. T. Ohta, and W. A. Shiroma, "Two-octave tunable liquid-metal monopole antenna," Electronics Letters, vol. 50, no. 1, pp. 19-20, 2014. Link

  • A. M. Morishita, C. K. Y. Kitamura, A. T. Ohta, and W. A. Shiroma, "A liquid-metal monopole array with tunable frequency, gain, and beam steering," IEEE Antennas and Wireless Propagation Letters, vol. 12, pp. 1388-1391, 2013. Link


  • Lab on a Chip inside cover

  • W. Hu, Q. Fan, and A. T. Ohta, "An opto-thermocapillary cell micromanipulator," Lab on a Chip, vol. 13, no. 12, pp. 2285-2291, 2013. PMC: 3681525, NIHMSID: 479065. (Lab on a Chip Top 10% article) Link

  • W. Hu, K. S. Ishii, Q. Fan, and A. T. Ohta, "Hydrogel microrobots actuated by optically generated vapour bubbles," Lab on a Chip, vol. 12, no. 19, pp. 3821-3826, 2012. Link

  • K. S. Ishii, W. Hu, S. A. Namekar, and A. T. Ohta, "An optically controlled 3D cell culturing system," Advances in OptoElectronics, vol. 2011, Article ID 253989, 8 pages, 2011.Link

  • W. Hu, K. S. Ishii, and A. T. Ohta, "Micro-assembly using optically controlled bubble microrobots," Applied Physics Letters, vol. 99, p. 094103, 2011. Link

  • B. J. Lei, A. Zamora, T. F. Chun, A. T. Ohta, and W. A. Shiroma, "A wideband, pressure-driven, liquid-tunable frequency selective surface," IEEE Microwave and Wireless Components Letters, vol. 21, pp. 465-467, 2011. Link

  • W. Hu and A. T. Ohta, "Aqueous droplet manipulation by optically induced Marangoni circulation," Microfluidics and Nanofluidics, vol. 11, pp. 307-316, 2011. Link

  • A. T. Ohta, M. Garcia, J. K. Valley, L. Banie, H.-Y. Hsu, A. Jamshidi, S. L. Neale, T. Lue, and M. C. Wu, "Motile and non-motile sperm diagnostic manipulation using optoelectronic tweezers," Lab on a Chip, vol. 10, pp. 3213-3217, 2010. Link

  • H.-Y. Hsu, A. T. Ohta, P.-Y. Chiou, A. Jamshidi, S. L. Neale, and M. C.Wu, "Phototransistor-based optoelectronic tweezers for dynamic cell manipulation in cell culture media,"Lab on a Chip, vol. 10, no. 2, pp. 165-172, 2010. Link

  • J. K. Valley, A. T. Ohta, H.-Y. Hsu, S. L. Neale, A. Jamshidi, and M. C. Wu, "Optoelectronic tweezers as a tool for parallel single-cell manipulation and stimulation," IEEE Transactions on Biomedical Circuits and Systems, vol. 3, no. 6, pp. 424-431, 2009. Link

  • A. Jamshidi, S. L. Neale, K. Yu, P. J. Pauzauskie, P. J. Schuck, J. K. Valley, H.-Y. Hsu, A. T. Ohta, and M. C. Wu, "NanoPen: Dynamic, low-power, and light-actuated patterning of nanoparticles," Nano Letters, vol. 9, no. 8, pp. 2921-2925, 2009. Link

  • A. N. K. Lau, A. T. Ohta, H. L. Phan, H.-Y. Hsu, A. Jamshidi, P.-Y. Chiou, M. C. Wu, "Antifouling coatings for optoelectronic tweezers," Lab on a Chip, vol. 9, pp. 2952-2957, 2009. Link

  • G. Shah, A. T. Ohta, E. P. Y. Chiou, M. C. Wu, C.-J. Kim, "EWOD-driven droplet microfluidic device integrated with optoelectronic tweezers as an automated platform for cellular isolation and analysis," Lab on a Chip, vol. 9, pp. 1732-1739, 2009. Link

  • J. K. Valley, S. Neale, H. Y. Hsu, A. T. Ohta, A. Jamshidi, M. C. Wu, "Parallel single-cell light-induced electroporation and dielectrophoretic manipulation," Lab on a Chip, vol. 9, pp. 1714-1720, 2009. Link

  • M.-C. Tien, A. T. Ohta, K. Yu, S. L. Neale, M. C. Wu, "Heterogeneous integration of InGasAsP microdisk laser on a silicon platform using optofluidic assembly," Applied Physics A: Materials Science & Processing, vol. 95, no. 4, pp. 967-972, 2009. Link

  • P.-Y. Chiou, A. T. Ohta, A. Jamshidi, H. Y. Hsu, M. C. Wu,"Light-actuated ac electroosmosis for nanoparticle manipulation," IEEE Journal of Microelectromechanical Systems, vol. 17, no.3, pp. 525-531, 2008. Link

  • J. K. Valley, A. Jamshidi, A. T. Ohta, H.-Y. Hsu, M. C. Wu, "Operational regimes and physics present in optoelectronic tweezers," IEEE Journal of Microelectromechanical Systems, vol. 17, no. 2, pp. 342-350, 2008. Link

  • A. Jamshidi, P. J. Pauzauskie, P. J. Schuck, A. T. Ohta, P.-Y. Chiou, J. Chou, P. Yang, M. C. Wu, "Dynamic manipulation and separation of individual semiconducting and metallic nanowires," Nature Photonics, vol. 2, no. 2, pp. 86-69, 2008. Link

  • A. T. Ohta, A. Jamshidi, J. K. Valley, H.-Y. Hsu, M. C. Wu, "Optically actuated thermocapillary movement of gas bubbles on an absorbing substrate," Applied Physics Letters, vol. 91, no. 7, pp. 074103-3, 2007. Link

  • A. T. Ohta, P. Y. Chiou, T. H. Han, J. C. Liao, U. Bhardwaj, E. R. B. McCabe, F. Yu, R. Sun, M. C. Wu, "Dynamic cell and microparticle control via optoelectronic tweezers,"IEEE Journal of Microelectromechanical Systems, vol. 16, no. 3, pp. 491-499, 2007. Link

  • A. T. Ohta, P. Y. Chiou, H. L. Phan, S. W. Sherwood, J. M. Yang, A. N. K. Lau, H.-Y. Hsu, A. Jamshidi, M. C. Wu, "Optically-controlled cell discrimination and trapping using optoelectronic tweezers," IEEE Journal of Selected Topics in Quantum Electronics, vol. 13, no. 2, pp. 235-243, 2007. Link

  • P. Y. Chiou, A. T. Ohta, M. C. Wu, "Massively parallel manipulation of single cells and microparticles using optical images," Nature, vol. 436, no. 7049, pp. 370-372, 2005. Link


Conference papers:

  • M. A. Rahman, J. Cheng, and A. T. Ohta, “Automated cooperative micro-assembly using multiple bubble microrobots,” 9th IEEE International Conference on Nano/Molecular Medicine and Engineering (NANOMED), Honolulu, HI, Nov. 2015.

  • J. H. Dang, R. C. Gough, A. M. Morishita, A. T. Ohta, and W. A. Shiroma, “Liquid-metal-based phase shifter with reconfigurable EBG filling factor,” 2015 IEEE MTT-S International Microwave Symposium, Phoenix, AZ, May 2015.

  • J. H. Dang, R. C. Gough, A. M. Morishita, A. T. Ohta, and W. A. Shiroma, “A tunable X-band substrate integrated waveguide cavity filter using reconfigurable liquid-metal perturbing posts,” 2015 IEEE MTT-S International Microwave Symposium, Phoenix, AZ, May 2015.

  • M. A. Rahman, J. Cheng, Q. Fan, and A. T. Ohta, “Automated actuation of multiple bubble microrobots using computer-generated holograms,” SPIE Sensing Technology and Applications, Baltimore, MD, Apr. 2015.

  • A. M. Morishita, J. H. Dang, R. C. Gough, A. T. Ohta, and W. A. Shiroma, “A tunable amplifier using reconfigurable liquid-metal double-stub tuners,” 2015 Texas Symposium on Wireless & Microwave Circuits & Systems, Waco, TX, Apr. 2015.

  • R. C. Gough, J. H. Dang, A. M. Morishita, A. T. Ohta, and W. A. Shiroma, “Reconfigurable coupled-line bandpass filter with electrically actuated liquid-metal tuning,” 2014 Asian-Pacific Microwave Conference, Sendai, Japan, Nov. 2014.

  • A. M. Morishita, R. C. Gough, J. H. Dang, A. T. Ohta, and W. A. Shiroma, "A liquid-metal reconfigurable log-periodic balun," 2014 IEEE MTT-S International Microwave Symposium, Tampa, FL, Jun. 2014.

  • R. C. Gough, J. H. Dang, Andy M. Morishita, A. T. Ohta, and W. A. Shiroma, "Frequency-tunable slot antenna using continuous electrowetting of liquid metal," 2014 IEEE MTT-S International Microwave Symposium, Tampa, FL, Jun. 2014. (Second place in Student Paper Competition)

  • Q. Fan, W. Hu, and A. T. Ohta, "Molecular delivery and transfection by laser-induced oscillating microbubbles," 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS), Honolulu, HI, Apr. 2014.

  • W. Hu, Q. Fan, A. H. Nicholas, M. C. Hagenow, and A. T. Ohta, "Bubble micro-manipulator for co-operative micro-manipulation," 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS), Honolulu, HI, Apr. 2014.

  • W. Hu, Q. Fan, and A. T. Ohta, "Assembly of cell-laden microgels by an optically controlled bubble manipulator," 17th International Conference on Miniaturized Systems for Chemistry and Life Sciences (µTAS), pp. 997-999, Freiburg, Germany, Oct. 2013.

  • Q. Fan, W. Hu, and A. T. Ohta, "Light-induced microbubble poration of localized cells," 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Osaka, Japan, Jul. 2013.

  • W. Hu, Q. Fan, W. Tonaki, and A. T. Ohta, "Bubble-driven light-absorbing hydrogel microrobot for the assembly of bio-objects," 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Osaka, Japan, Jul. 2013.

  • C. K. Kitamura, A. M. Morishita, T. F. Chun, W. G. Tonaki, A. T. Ohta, and W. A. Shiroma, "A liquid-metal reconfigurable Yagi-Uda monopole array," 2013 IEEE MTT-S International Microwave Symposium, Seattle, WA, Jun. 2013.

  • W. G. Tonaki, W. Hu, A. T. Ohta, and W. A. Shiroma, "A reconfigurable, liquid-metal-based low-pass filter with reversible tuning," 2013 IEEE MTT-S International Wireless Symposium, Beijing, China, Apr. 2013.

  • A. T. Ohta, S. Guo, B. J. Lei, W. Hu, and W. A. Shiroma, "A liquid-metal tunable electromagnetic-bandgap microstrip filter," IEEE International Conference on Wireless Information Technology and Systems, Nov. 2012.

  • W. Hu, Q. Fan, K. S. Ishii, and A. T. Ohta, "An opto-thermocapillary cell manipulator," 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences (μTAS), pp. 1654- 1656, Oct. 2012.

  • S. Guo, B. J. Lei, W. Hu, W. A. Shiroma, and A. T. Ohta, "A tunable low-pass filter using a liquid-metal reconfigurable periodic defected ground structure," Proceedings of the International Micro-wave Symposium (IMS), June 2012.

  • B. J. Lei, W. Hu, A. T. Ohta, and W. A. Shiroma, "A liquid-metal reconfigurable double-stub tuner," Proceedings of the International Microwave Symposium (IMS), June 2012.

  • K. S. Ishii, W. Hu, and A. T. Ohta, "Cooperative micromanipulation using optically controlled bubble microrobots," Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), pp. 3443-3448, May 2012.

  • W. Hu, K. S. Ishii, and A. T. Ohta, "Micro-assembly using optically controlled bubble microrobots in saline solution," Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), pp. 733-738, May 2012. (Finalist for Best Conference Paper award)

  • W. Hu, K. S. Ishii, and A. T. Ohta, "Micro-assembly using optically controlled bubbles," Proc. of the 16th International Conference on Optical MEMS and Nanophotonics, pp. 53-54, Aug. 2011.

  • X. Zhang, A. T. Ohta, D. Garmire, "Rapid monodisperse microencapsulation of single cells," IEEE Engineering in Medicine and Biology Society Meeting, Sept. 2010.

  • M. Garcia, A. Ohta, E. Vittinghof, G. Lin, M. Wu, and T. Lue, "A novel non-invasive, motility-independent sperm sorting method and technology to identify and retrieve individual viable non-motile sperm for ICSI," American Urological Association Annual Meeting, abstract 1876, 2010.

  • A. T. Ohta, M. Garcia, T. Lue, and M. C. Wu, "Optoelectronic tweezers for cell manipulation and sorting," 4th Asian and Pacific Rim Symposium on Biophotonics (APBP), 2009.