A simple preparation of a stable CdS-polyacrylamide nanocomposite: structure, thermal and optical properties.
A facile approach was employed for the preparation of stable luminescent nanocomposites of CdS quantum dots (QDs) and polyacrylamide (PAM) through the cross coupling chemistry. Initially, CdS QDs were synthesized in a well controlled manner using 3-mercaptopropionic acid as a capping agent. Then, carboxylic acid groups on CdS QDs were chemically incorporated into PAM matrices with the assistance of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxysulfosuccinimide coupling agents. FT-IR analysis was used to investigate the chemical incorporation of CdS QDs in PAM matrices via the covalent protocol. The XPS elemental mapping studies further suggested the formation of CdS-PAM nanocomposites. FE-SEM and TEM images were engaged to study the morphologies, and distribution of CdS QDs in the PAM networks. The physical structure of the CdS-PAM nanocomposites was investigated by XRD analysis. Thermal stability of the nanocomposites was observed to be enhanced in compare to PAM as evidenced from TGA data. The UV-vis and photoluminescence studies of the CdS-PAM nanocomposites suggested their promising optical applications.
Department of Imaging System Engineering, Pukyong National University, Busan, 608-737, Korea.
Long Giang
LG
Bach
M Rafiqul
MR
Islam
Seong-Soo
SS
Hong
Kwon Taek
KT
Lim
D000180:Acrylic Resins / Q000737:chemistry*; D019187:Cadmium Compounds / Q000138:chemical synthesis*; D003460:Crystallization / Q000379:methods*; D049449:Luminescence; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D045663:Quantum Dots; D012031:Refractometry; D018036:Selenium Compounds / Q000138:chemical synthesis*; D013499:Surface Properties; D013814:Thermal Conductivity; D000099166:Polyacrylamides
D000180:Acrylic Resins; D019187:Cadmium Compounds; D046911:Macromolecular Substances; D018036:Selenium Compounds; D000099166:Polyacrylamides; C058667:cadmium selenide