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.
Tan
Yong
Y
State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, PR China.
Ding
Shaohua
S
Wang
Yi
Y
Jing
Aihua
A
Qian
Weiping
W
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