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. Author manuscript; available in PMC: 2015 Jul 7.
Published in final edited form as: Technology (Singap World Sci). 2015 Mar;3(1):38–44. doi: 10.1142/S2339547815500016

Figure 3.

Figure 3

Images of glass microbubbles labeled with PE-conjugated biotin. Unmodified glass microbubbles (as shown in the phase-contrast image a) are not labeled with PE-conjugated biotin as there is no fluorescence shown in the fluorescence image b, where as the surface-modified glass microbubbles (as shown in the phase-contrast image c) have bright ring-shaped fluorescence shown in image d, indicating that the PE-conjugated biotin molecules are immobilized on the surface of glass microbubbles by their NeutrAvidin coating (scale bar = 50 μm).