Transformation of Se@Ag2Se core--shell colloids and nanowires into trigonal se nanorods and uniform spherical Ag2Se colloids.
Physical separation of Ag(2)Se colloids and trigonal (t) Se nanowires transformed from amorphous (a) Se@Ag(2)Se core-shell spherical colloids and from t-Se@Ag(2)Se core-shell nanowires was conducted above the softening temperature ( approximately 132 degrees C) of Ag(2)Se. The Ag(2)Se shells in a-Se@Ag(2)Se core-shell colloids were first collapsed and then transformed into isolated solid spheres as the a-Se cores were dissolved in solvent and transformed into separate t-Se nanowires. In t-Se@Ag(2)Se core-shell nanowires, the soft Ag(2)Se shells dewetted on the t-Se nanowires and transformed into small droplets. While the formation of the spherical Ag(2)Se was not affected by the presence of surfactants, the structure of t-Se was highly dependent on the chemical structure of the polymeric surfactants.
Moon
Geon Dae
GD
Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-Dong, Seoul, Korea.
Jeong
Unyong
U
D003102:Colloids; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053770:Nanowires; D018036:Selenium Compounds / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
D003102:Colloids; D018036:Selenium Compounds; D012834:Silver