Biomimetic formation of silica thin films by surface-initiated polymerization of 2-(dimethylamino)ethyl methacrylate and silicic acid.
Biosilicification in diatoms is achieved by specific interactions between silaffins, composed of polypeptides and long-chain polyamines, and silicic acid derivatives. The polycondensation of silicic acids is reported to be catalyzed by the long-chain polyamines that mainly contain tertiary N-methylpropyleneimine moieties. In this report, we utilized a tertiary amine-containing polymer, poly(2-(dimethylamino)ethyl methacrylate) (poly(DMAEMA)), as a surface-grafted, biomimetic counterpart of the long-chain polyamines in silaffins and demonstrated that the surface-initiated polycondensation of silicic acids, leading to the formation of silica thin films, proceeded smoothly on surfaces presenting poly(DMAEMA), where poly(DMAEMA) was grown from gold surfaces by surface-initiated, atom transfer radical polymerization. The formed silica film was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, and scanning electron microscopy.
Kim
Dong Jin
DJ
Lee
Kyung-Bok
KB
Chi
Young Shik
YS
Kim
Wan-Joong
WJ
Paik
Hyun-Jong
HJ
Choi
Insung S
IS
D006046:Gold / Q000737:chemistry; D008567:Membranes, Artificial; D008689:Methacrylates / Q000737:chemistry*; D010316:Particle Size; D012824:Silicic Acid / Q000737:chemistry*; D012822:Silicon Dioxide / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties
D008567:Membranes, Artificial; D008689:Methacrylates; D012824:Silicic Acid; D006046:Gold; D012822:Silicon Dioxide; C049840:2-(dimethylamino)ethyl methacrylate