Research On The Strong Optical Effects Of The Triangular Plate-like Au/Ag Nanoparticles

The advantages of gold and silvertriangular plate-like nanoparticles include the unique triangular structure with sharp tips, tunable surface plasmon resonance peak from visible to near infraredregion and strong localized field enhancement effect. They can be applied as substrates for surface enhanced Raman spectroscopy (SERS), surface enhanced fluorescence and biological molecule sensing, as well as nonadevices for drug delivery.The triangular silver nanoprisms (SNPs) are easy to synthesize with high productivity. We untilized the SNPs to prepare several types of SERS tags, among which we found the one with thesthrongest SERS signal. This type of SERS tags was successgully realized in deepRamanspectrascopy detection with10mm depth.Furthermore, we synthesized hollow AuAg alloyed triangular nanoboxes (TNBs) with tunable localized surface plasmon resonances (LSPR) peak from visible to NIR region. We then study the surface plasmon properties of TNBs and explore their application in SERSimaging. Finite-Difference Time-Domain (FDTD) method is used to calculate electromagnetic fields induced by optical excitation of LSPR of AuAg alloyed TNBs for the first time. The calculated results are proved through in-vivo SERS imaging by a new type of SERS tags based on TNBs.Finally, we investigated TNBs’application in potentialdrug delivery for cancer treatment. The unique hollow structure of TNBs may facilitate direct encapsulation of anticancer drugswithout any surface coatings. The femtosecond laser near-field ablation experiment is studied as one possible method to release the drug.