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Synthesis of polyacrylamide hydrogels as p–n ‐junction with ionic charge carriers
Author(s) -
Alveroglu Esra,
Yilmaz Yasar
Publication year - 2014
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23832
Subject(s) - dopant , polyacrylamide , materials science , self healing hydrogels , doping , ionic bonding , polymer chemistry , layer (electronics) , charge carrier , slab , mixing (physics) , chemical engineering , ion , nanotechnology , optoelectronics , chemistry , organic chemistry , physics , quantum mechanics , geophysics , engineering
Three different designs for p–n junctions were formed with p ‐and n ‐type polyacrylamide hydrogels (PAAm) doped with positive (Na + ) and negative (Br − ) ions as charge carriers. First, previously synthesized p ‐and n ‐type gels in slab forms were contacted physically with together. Second, having synthesized p‐ type gel, n‐ type pregel solution was poured onto p ‐type slab gel for synthesis. Thus, p ‐and n ‐type gels were synthesized as to be contacted chemically together. Third, first p ‐type and n ‐type pregel solutions were mixed together, then the mixing was poured into a pot to form a layer, and then the reaction was performed under an electric field for directing the dopants on the opposite sides. The rectification efficiencies of all these junctions were discussed in detail. POLYM. ENG. SCI., 54:2799–2805, 2014. © 2013 Society of Plastics Engineers