Figure 4
From: Simultaneous acoustic and photoacoustic microfluidic flow cytometry for label-free analysis

Maximum amplitude plot of the time domain signals of the US backscatter and PA waves from individual particles as detected by the transducer for three different samples: black particles exclusively (top row), white particles exclusively (middle row), and a mixture of both types of particles (bottom row). The y-axes represent 50 particles detected by the acoustic flow cytometer from each experiment. The x-axes represent the “slow-time” of the acquisition by the transducer while the particles flow downstream. The amplitude of the detected signals (in V) is represented by the color bars.