Lau, S. T. Li, H. Wong, K. S. Zhou, Q. F. Zhou, D. Li, Y. C. Luo, H. S. Shung, K. K. Dai, J. Y.
Published in
Journal of Applied Physics
Lead magnesium niobate–lead titanate single crystal 0.72Pb(Mg1∕3Nb2∕3)O3−0.28PbTiO3 (abbreviated as PMN-PT) was used to fabricate high performance ultrasonic phased-array transducer as it exhibited excellent piezoelectric properties. In this paper, we focus on the design and fabrication of a low-loss and wide-band transducer for medical imaging app...
Stein, Erich W. Maslov, Konstantin Wang, Lihong V.
Published in
Journal of Applied Physics
Noninvasive, high resolution imaging of mouse brain activity is poised to provide clinically translatable insights into human neurological disease progression. Toward noninvasive imaging of brain activity through the hemodynamic response, the dark-field photoacoustic microscopy (PAM) technique was enhanced to image the cortex vasculature of the mou...
Davis, Scott C. Pogue, Brian W. Tuttle, Stephen B. Dehghani, Hamid Paulsen, Keith D.
Published in
Journal of Applied Physics
The influence of tissue optical properties on the shape of near-infrared (NIR) fluorescence emission spectra propagating through multiple centimeters of tissue-like media was investigated. Fluorescence emission spectra measured from 6 cm homogeneous tissue-simulating phantoms show dramatic spectral distortion which results in emission peak shifts o...
Gao, Zhiyuan Zhou, Jun Gu, Yudong Fei, Peng Hao, Yue Bao, Gang Wang, Zhong Lin
Published in
Journal of Applied Physics
We have investigated the effects of piezoelectric potential in a ZnO nanowire on the transport characteristics of the nanowire based field effect transistor through numerical calculations and experimental observations. Under different straining conditions including stretching, compressing, twisting, and their combination, a piezoelectric potential ...
Fletcher, Benjamin L. Fern, Jared T. Rhodes, Kevin McKnight, Timothy E. Fowlkes, Jason D. Retterer, Scott T. Keffer, David J. Simpson, Michael L. Doktycz, Mitchel J.
Published in
Journal of Applied Physics
Anode geometry can significantly affect the electrochemical synthesis of conductive polymers. Here, the effects of anode dimensions on the electropolymerization of pyrrole are investigated. Band microelectrodes were prepared with widths ranging from 2 to 500 μm. The anode dimension has a significant effect on the resulting thickness of polymer film...
Strychalski, Elizabeth A. Lau, Henry W. Archer, Lynden A.
Published in
Journal of Applied Physics
A nonequilibrium regime of size-based separation was observed experimentally for double-stranded deoxyribonucleic acid (DNA) molecules with lengths below 1 kbp moving electrokinetically through nanofluidic nanoslit arrays. The breakdown of Ogston sieving was supplanted at higher electric fields to recover rapid separation with a reversed elution or...
Reinhold, M. Kiener, D. Knowlton, W. B. Dehm, G. Müllner, P.
Published in
Journal of Applied Physics
The maximum actuation frequency of magnetic shape-memory alloys (MSMAs) significantly increases with decreasing size of the transducer making MSMAs interesting candidates for small scale actuator applications. To study the mechanical properties of Ni–Mn–Ga single crystals on small length scales, two single-domain micropillars with dimensions of 10×...
Li, Xiuming Zhang, Rui Huang, Naixing Lü, Tianquan Cao, Wenwu
Published in
Journal of Applied Physics
Surface acoustic wave (SAW) propogation in Y -cut and Z -cut relaxor-based 0.67Pb(Mg1∕3Nb2∕3)O3–0.33PbTiO3 (PMN-33%PT) ferroelectric single crystals poled along [001] c cubic direction has been analyzed theoretically. Characteristic curves were obtained for the phase velocity, electromechanical coupling coefficient and PFA of SAW in Y -cut and Z -c...
Doll, Joseph C. Park, Sung-Jin Pruitt, Beth L.
Published in
Journal of Applied Physics
Piezoresistive cantilevers fabricated from doped silicon or metal films are commonly used for force, topography, and chemical sensing at the micro- and macroscales. Proper design is required to optimize the achievable resolution by maximizing sensitivity while simultaneously minimizing the integrated noise over the bandwidth of interest. Existing a...
Chippada, Uday Langrana, Noshir Yurke, Bernard
Published in
Journal of Applied Physics
Hydrogels have been used as substrates for studying the cellular processes by many researchers. The stiffness of such gels was also characterized previously. However, in most of the cases, these soft Poisson’s ratio was assumed incompressible and Poisson’s ratio is assumed to be one-half. This may not be true in many cases, and might alter the calc...