title: A general method to synthesis of amphiphilic colloidal nanoparticles of CdS and noble metals.
abstract: Amphiphilic colloids of CdS and noble metal nanoparticles, which can be dispersed both in water and organic solvents such as ethanol, N,N-dimethylformamide, chloroform, and toluene, are studied. The amphiphilic colloidal nanoparticles are synthesized by grafting the amphiphilic and thermoresponsive polymer of thiol-terminated poly(N-isopropylacrylamide) to CdS and noble metal nanoparticles. The size and morphology of the PNIPAM-grafted colloidal nanoparticles of CdS@PNIPAM can be tuned by changing the molar ratio of PNIPAM/CdS. The size of CdS@PNIPAM nanoparticles slightly decreases first from 5.5 to 4.4 nm then slightly increases from 4.4 to 6.1 nm with the decrease in the molar ratio from 1/1 to 1/10. Spherical nanoparticles of CdS@PNIPAM are synthesized at a higher molar ratio and worm-like nanoparticles are obtained at a lower molar ratio. The resultant PNIPAM-grafted colloidal nanoparticles of CdS@PNIPAM, Au@PNIPAM, Pd@PNIPAM, and Ag@PNIPAM are thermoresponsive in water and show a cloud-point temperature at about 32.5 degrees C.
authors: Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, PR China.
authors: Guanwei
authors: G
authors: Wei
authors: Fei
authors: F
authors: Wen
authors: Xu
authors: X
authors: Zhang
authors: Wangqing
authors: W
authors: Zhang
authors: Xiaowei
authors: X
authors: Jiang
authors: Peiwen
authors: P
authors: Zheng
authors: Linqi
authors: L
authors: Shi
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry*; D003102:Colloids; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008670:Metals / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D013053:Spectrophotometry; D013440:Sulfides / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000180:Acrylic Resins; D019187:Cadmium Compounds; D003102:Colloids; D008670:Metals; D013440:Sulfides; C034939:cadmium sulfide; D014867:Water; C052970:poly-N-isopropylacrylamide