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Near-infrared laser light mediated antibacterial activity of polyaniline coated surface film
김성한,공병윤,이기백,박성영 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The optical absorption abilities of surface-coated films for photothermal application have been relatively less explored in the construction of antibacterial coatings. Here, we report catechol-conjugated poly(vinylpyrrolidone) sulfobetaine (PVPS) and polyaniline (PANI) tightly linked by ionic interaction (PVPS:PANI) as a novel photothermal antibacterial agent for surface coating capable of absorbs broadband near-infrared (NIR) light. Taking advantage of the NIR light absorption, this coating film can release eminent photothermal heat for the rapid killing of surface bacteria. Although considerable progress has been made in the design of antibacterial coatings, the user control of NIR-irradiated rapid photothermal destruction of surface bacteria holds increasing attention beyond the traditional boundaries of typical antibacterial surfaces.
김영래,전홍준,이한성,곽정춘,황호수,공병윤,이내성,Kim, Young-Rae,Jeon, Hong-Jun,Lee, Han-Sung,Goak, Jeung-Choon,Hwang, Ho-Soo,Kong, Byung-Yun,Lee, Nae-Sung 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.4
This study investigated the growth characteristics of carbon nanotubes (CNTs) by changing a period of annealing time and a $C_{2}H_{2}/H_2$ flow ratio at temperature as low as $450^{\circ}C$ with inductively coupled plasma chemical vapor deposition. The 1-nm-thick Fe-Ni-Co alloy thin film served as a catalyst layer for the growth of CNTs, which was thermally evaporated on the 15-nm-thick Al underlayer deposited on the 50-nm-thick Ti diffusion barrier. The annealing at low temperature of $450^{\circ}C$ brought about almost no granulation of the catalyst layer, and the CNT growth was not affected by a period of annealing time. A study of changing the flow rate of $C_{2}H_{2}$ and $H_2$ showed that as the ratio of the $C_{2}H_{2}$ flow rate to the $H_2$ flow rate was lowered, the CNTs were grown to be longer With further decreasing the flow ratio, the length of CNTs reached the maximum and then became shorter. Under the optimized gas flow rates, we successfully synthesized CNTs with a uniform length over a 4-inch Si wafer at $450^{\circ}C$.