“…Ingber demonstrated the excellent properties of PU made from GS polymer and procedures for creating strong bonds to itself. PDMS was found to have a greater transmittance than PU for 97 Carter et al, 98 Li et al, 99 Ferrari et al, 100 Guo et al, 101 2 SU-8 mechanical strength, optical transparency, chemically stable, resistant toward other solvents adhesion selectivity, stress and resist stripping pancreas-liver-on-a-chip and blood-brain barrier modeling Essaouiba et al, 102 Zakharova et al 103 3 POMaC biodegradable, nontoxic, inexpensive, controllable mechanical and degradation properties, and simple fabrication soft tissue engineering, heart-on-a-chip, and liveron-a-chip Zhao et al, 329 Lai et al, 87 Polidoro et al 104 4 polystyrene optically transparency, biocompatible, rigid, easy surface functionalization, and inexpensive high cost equipments, poor resistance toward to other solvents biosensors, blood-brain-barrier model, multilayer devices, and drug analysis Bossink et al, 105 Zakharova et al, 103 Paoli et al, 106 Onbas et al 107 5 P(OCS) and PICO nontoxic, biocompatible, inexpensive, good machine strength, easy surface functionalization tissue engineering Huyer et al, 95 wavelengths of <300 nm, while the material transmittances remained equivalent at higher wavelengths (>350 nm). 30 This is essential as in fluorescence spectroscopy, where higher wavelengths are more sensitive for assays, which is crucial in the drug-development stage.…”