Optical and electrical properties of Au nanoparticles in two-dimensional networks:an effective cluster model.
We report a study of the optical and electric properties of Au nanoparticle networks grown on the porous alumina membrane by dry atom sputtering deposition approach. An effective cluster model was developed to evaluate the dielectric function and the electrical conductivities of the nanoparticle networks by taking into account the effects of the Au particle size, the Au volume fraction, and the particle-particle interaction. The calculated transmission spectra from the model were in good agreement with the experimental data. The percolation threshold of the as-fabricated structure was predicted to occur at Au volume fraction of 0.18, consistent with the dc electric resistance measurement.
Su
Huimin
H
Department of Physics, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, PR China. soapy@ust.hk
Li
Yingshun
Y
Li
Xiao-Yuan
XY
Wong
Kam Sing
KS
D000537:Aluminum Oxide / Q000737:chemistry; D017097:Electric Impedance; D004563:Electrochemistry / Q000379:methods; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D015233:Models, Statistical; D036103:Nanotechnology / Q000379:methods; D055095:Optics and Photonics; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D019265:Spectroscopy, Near-Infrared / Q000379:methods; D020349:Surface Plasmon Resonance
D006046:Gold; D000537:Aluminum Oxide