TY - JOUR A1 - Pavlenko, E. S. A1 - Sander, M. A1 - Mitzscherling, Steffen A1 - Pudell, J. A1 - Zamponi, F. A1 - Rössle, M. A1 - Bojahr, A. A1 - Bargheer, M. T1 - Azobenzene – functionalized polyelectrolyte nanolayers as ultrafast optoacoustic transducers JF - Nanoscale N2 - We introduce azobenzene-functionalized polyelectrolyte multilayers as efficient, inexpensive optoacoustic transducers for hyper-sound strain waves in the GHz range. By picosecond transient reflectivity measurements we study the creation of nanoscale strain waves, their reflection from interfaces, damping by scattering from nanoparticles and propagation in soft and hard adjacent materials like polymer layers, quartz and mica. The amplitude of the generated strain ε∼5×10−4 is calibrated by ultrafast X-ray diffraction. KW - Picosecond acoustic KW - Ultrafast optoacoustic KW - Nanolayer KW - Polyelectrolyte PY - 2016 DO - https://doi.org/10.1039/c6nr01448h SN - 2040-3364 SN - 2040-3372 VL - 8 IS - 27 SP - 13297 EP - 13302 AN - OPUS4-37079 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -