Determine the releasing probability of laser-induced nanoparticles from a soft substrate
This letter presents a study of laser-induced nanoparticle release from a soft substrate in air under different conditions. A continuous wave (CW) laser heats a nanoparticle and causes a rapid thermal expansion of the substrate, which gives the nanoparticle an upward momentum that releases it from the substrate. The deformation of PMMA substrate, the releasing probability of different nanoparticles under different laser intensities are studied. The effect of the surface charges of the nanoparticles and the surface properties of the substrates on the nanoparticle release is also investigated. Finally, the nanoshells’ shape will be damaged during the transfer when the laser intensity is high. Compare to the laser induced forward transfer (LIFT), a low-cost CW laser is used in this study. Due to the simplicity of this technology and the wide availability of commercial nanoparticles, this nanoparticle release technology may find applications in nanoparticle characterization and nanomanufacturing.
Primary Advisor's Department
Stander Symposium, College of Arts and Sciences
Institutional Learning Goals
"Determine the releasing probability of laser-induced nanoparticles from a soft substrate" (2023). Stander Symposium Projects. 2822.