Poly harmonic imaging

A photosensitive triazene polymer with the structure shown in Scheme 8 was applied and a XeF excimer laser (351 nm) was used as irradiation source. Ejected plumes and blast waves were illuminated by fluorescence from a methanol solution of Rhodamine 101 which was excited by the second harmonic of a Q-switched Nd3+ YAG laser. The principles of this imaging method are the same as those reported previously for poly(methyl methacrylate) (PMMA) [94, 195, 199, 207] and liquid benzene [208]. 

LbL = layer-by-layer Ln = lanthanide LSS = liqnid-solid-solntion NIR = near-infrared NPs = nanoparticles OA = oleic acid ODE = octadecene PA = photon avalanche PAA = polyacrylic acid PAH = poly(allyIamine hydrochloride) PEI = polyethylenimine PSS = poly(sodium 4-styre-nesnlfonate) PVP = polyvinylpyrrohdone QDs = qnantum dot SAUCI = smaU-animal upconversion imager SHG = second-harmonic generation STPA = simultaneons two-photon absorption TOPO = trioctylphosphine oxide TPA = two-photon absorption UCNPs = Upconversion nanoparticle UV = nlfraviolet. 

---