Publications

Journal articles:

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:

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.