Particle Surface

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Judy A Raper - One of the best experts on this subject based on the ideXlab platform.

Hsinglin Wang - One of the best experts on this subject based on the ideXlab platform.

Hui Wang - One of the best experts on this subject based on the ideXlab platform.

  • gold nanoParticles with tipped Surface structures as substrates for single Particle Surface enhanced raman spectroscopy concave nanocubes nanotrisoctahedra and nanostars
    ACS Applied Materials & Interfaces, 2014
    Co-Authors: Qingfeng Zhang, Nicolas Large, Hui Wang
    Abstract:

    We demonstrate that Au nanoParticles with tipped Surface structures, such as concave nanocubes, nanotrisoctahedra, and nanostars, possess size-dependent tunable plasmon resonances and intense near-field enhancements exploitable for single-Particle Surface-enhanced Raman spectroscopy (spSERS) under near-infrared excitation. We report a robust seed-mediated growth method for the selective fabrication of Au concave nanocubes, nanotrisoctahedra, and nanostars with fine-controlled Particle sizes and narrow size distributions. Through tight control over Particle sizes, the plasmon resonances of the nanoParticles can be fine-tuned over a broad spectral range with respect to the excitation laser, allowing us to systematically quantify the SERS enhancements on individual nanoParticles as a function of Particle size for each Particle geometry. Understanding of the geometry-dependent plasmonic characteristics and SERS activities of the nanoParticles is further enhanced by finite-difference time-domain (FDTD) calcula...

Hakkim Chan - One of the best experts on this subject based on the ideXlab platform.

Nora Y K Chew - One of the best experts on this subject based on the ideXlab platform.