Regenerating optical properties of individual gold nanoparticles in alcoholic solvents without any surfactant.
We compared the optical properties of gold nanoparticles (GNPs) in various solvents with those of strawberry-like composite particles (Au/SiO2) consisting of a silica core and single attached GNPs. The results show that Au/SiO2 without any surfactant could regenerate well optical properties of individual GNPs in alcoholic solvents. By the electrophoretic light-scattering measurements, the high dispersibility of Au/SiO2 composite particles dispersed in alcoholic solvents has been demonstrated. In addition, using Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, we proposed a possible mechanism to qualitatively account for the dispersibility of Au/SiO2 in organic solvents such as alcoholic solvents and cyclohexane, which may provide an opportunity to manipulate optical signals of single nanoparticle in organic solvents.
State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, PR China.
Yong
Y
Tan
Shaohua
S
Ding
Yi
Y
Wang
Aihua
A
Jing
Weiping
W
Qian
D000438:Alcohols; D006046:Gold / Q000737:chemistry*; D008854:Microscopy, Electron; D049329:Nanostructures / Q000737:chemistry; D012997:Solvents; D013053:Spectrophotometry; D013314:Stress, Mechanical; D013501:Surface-Active Agents
D000438:Alcohols; D012997:Solvents; D013501:Surface-Active Agents; D006046:Gold