Synthesis and Multipole Plasmon Resonances of Spherical Aluminum Nanoparticles

• DOI: 10.1021/acs.jpclett.0c01754
• Publication Date: 2020-07-01T22:38:33Z
• Authors: Hua Yu; Peng Zhang; Shaoyong Lu; Shuang Yang; Fei Peng; Wei-Shun Chang; Kun Liu
• Keywords: Discrete dipole approximation; Particle (ecology)

In comparison to Au and Ag, the high plasma frequency of Al allows multipole plasmon resonances from ultraviolet visible (UV-vis) range be achieved by its nanoparticles with much smaller sizes even a spherical shape. Herein, we report high-supersaturation growth monodisperse (Al NPs) 84 200 nm their distinctive size-dependent resonance properties in UV-vis range. Linear relationships between particle diameter peak positions dipole, quadrupole, octupole were observed experimentally confirmed finite-difference time-domain (FDTD) calculations. FDTD calculations further reveal scattering-to-extinction ratio modes for diameters >100 nm. The extinction coefficients NPs different also determined. excellent matching experimental simulated results present work not only offers standard synthesis characterization high-quality but provides new insight into plasmonic advanced optical sensing applications.