scholarly journals Localized-density-matrix method and its application to nanomaterials

2000 ◽  
Vol 72 (1-2) ◽  
pp. 281-291 ◽  
Author(s):  
GuanHua Chen ◽  
Satoshi Yokojima ◽  
WanZhen Liang ◽  
XiuJun Wang
Keyword(s):  
Carbon Nanotubes ◽  
Excited State ◽  
Density Matrix ◽  
Absorption Spectra ◽  
Matrix Method ◽  
Nanoscale Materials ◽  
Large Systems

The localized-density-matrix (LDM) method has been developed to calculate the excited state properties of very large systems containing thousands of atoms. It is particularly suitable for simulating the dynamic electronic processes in nanoscale materials, and has been applied to poly(p-phenylenevynelene) (PPV) aggregates and carbon nanotubes. Absorption spectra of PPVs and carbon nanotubes have been calculated and compared to the experiments.

scholarly journals Localized-Density-Matrix Method and Its Application to Carbon Nanotubes

2000 ◽  
Vol 104 (11) ◽  
pp. 2445-2453 ◽  
Author(s):  
WanZhen Liang ◽  
Satoshi Yokojima ◽  
DongHao Zhou ◽  
GuanHua Chen
Keyword(s):  
Carbon Nanotubes ◽  
Density Matrix ◽  
Matrix Method

scholarly journals Absorption Properties of Hybrid Composites of Gold Nanorods and Functionalized Single-Walled Carbon Nanotubes

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Deok-Jin Yu ◽  
D. Ganta ◽  
Elijah Dale ◽  
A. T. Rosenberger ◽  
James P. Wicksted ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Absorption Spectra ◽  
Self Assembly ◽  
Hybrid Composites ◽  
Single Walled Carbon Nanotubes ◽  
Plasmon Mode ◽  
Absorption Properties ◽  
Au Nanorods ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

We report on the optical properties of fabricated nanohybrid structures containing Au nanorods and functionalized single-walled carbon nanotubes in aqueous solutions. In particular, the absorption spectra of these hybrid materials are studied as a function of the concentration of the functionalized single-walled carbon nanotubes as well as the evolution time following preparation. The absorption spectra show a red shift of the longitudinal plasmon mode of the Au nanorods along with the emergence of broadened structures at wavelengths between 1000 and 1100 nm. These results, supported by TEM images, indicate the self-assembly of the Au nanorods forming on the sidewalls of the functionalized SWNTs driven by polyelectrolyte interactions.

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