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. 2016 Oct 6;6:34803. doi: 10.1038/srep34803

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Copyright © 2016, The Author(s)

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(a) Ultrasound velocity and (b) ultrasound attenuation at different distances in a non-conducting liquid (HFE) and deionized (DI) water using an unfocused transducer. (c) Ultrasound signals from unfocused (wo/AF) and focused (w/AF) transducers at 11 mm distance in HFE and DI water. (d) Relative optical transmittance of HFE compared to water. US, ultrasound; AF, acoustic focusing; HFE, hydrofluoroether.