AbstractThis research aimed to develop a procedure to optically trap organic solvents in the form of
microdroplet and to evaluate its optical stiffness based on the corner frequency,
??. The selected organic solvents were 1,2-dichlorobenzene, acetonitrile, chloroform, ethanol,
ethyl acetate and toluene. Microdroplets in water solution were prepared by ultrasonication for 2
minutes. Microdroplets in the range of 2 to 3 µm in diameter were then trapped by using 915 nm
laser at power densities of 6.3, 7.4 and 8.4 MW/cm² with laser spot size 1.1 µm. A quadrant
photodiode (QPD) was used to collect the scattered light from the single trapped microdroplet. The
signal was analysed using custom made software named OSCal to determine ?? of the optical
trap. The results showed that 1,2-dichlorobenzene, chloroform and toluene formed stable
microdroplets in water. Thus, these microdroplets can be optical trapped. The optical stiffness
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