Plasmonic Enhanced Nonlinear Absorption of Tris(2-aminoethyl)amine (TREN) Functional Ag, Pt, and Pd Nanoparticle-GQDs Complexes and Their Evaluation as Potential Bioimaging Applications.

ABSTRACT: Tris (2-aminoethyl)amine (TREN) functionalized N-doped graphene quantum dots (N-GQDs) and their Ag, Pd, and Pt nanocomposites were synthesized via a green one-step method and comprehensively characterized using FT-IR, UV-vis, TEM, and EDX. Spectroscopic analysis revealed π-π* transitions of C═C bonds (245-250 nm) and n-π* transitions of C═O and C═N bonds (334-350 nm), elucidating the materials' optical properties. Photoluminescence studies revealed excitation wavelength-dependent emissions, indicating the presence of edge defect levels. Femtosecond transient absorption spectroscopy revealed a shortened excited-state lifetime upon incorporation of a metal atom into TREN-GQDs. Nonlinear absorption was explored by using the open-aperture Z-scan method, revealing enhanced performance up

SUBMITTER: Unlu BA 

PROVIDER: S-EPMC12284890 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature