Without template one-dimensional gold nanochain was obtained in solution of surfactant. The surfactant, such as sodium dodecyl sulfonate, only played a role of protection, not a template. The length and diameter of gold nanochain were in proportion to the concentration of in the range of 1～5 mmol• L^－1, while using various techniques like TEM, UV-Vis, light-scattering spectral analysis and fluorescence emission spectral analysis, the gold nanochain was characterized. Compared with gold nanoparticles, the UV-Vis absorption peak was red-shifted and on the HRTEM image, crystal lattice of gold atoms was distinctly observed between nanoparticles in the chain. Such gold nanochain had an 8-time stronger scattering light than gold nanoparticle prepared on the same conditions, and a non-linear optic characteristic. The mechanism forming gold nanochain was discussed.

Key words: gold nanochain, preparation, sodium dodecyl sulfonate, light scattering