title: DNA-base guanine as hydrogen getter and charge-trapping layer embedded in oxide dielectrics for inorganic and organic field-effect transistors.
abstract: DNA-base small molecules of guanine, cytosine, adenine, and thymine construct the DNA double helix structure with hydrogen bonding, and they possess such a variety of intrinsic benefits as natural plentitude, biodegradability, biofunctionality, low cost, and low toxicity. On the basis of these advantages, here, we report on unprecedented useful applications of guanine layer as hydrogen getter and charge trapping layer when it is embedded into a dielectric oxide of n-channel inorganic InGaZnO and p-channel organic heptazole field effect transistors (FETs). The embedded guanine layer much improved the gate stability of inorganic FETs gettering many hydrogen atoms in the gate dielectric layer of FET, and it also played as charge trapping layer to which the voltage pulse-driven charges might be injected from channel, resulting in a threshold voltage (Vth) shift of FETs. Such shift state is very ambient-stable and almost irrevocable even under a high electric-field at room temperature. So, Boolean logics are nicely demonstrated by using our FETs with the guanine-embedded dielectric. The original Vth is recovered only under high energy blue photons by opposite voltage pulse (charge-ejection), which indicates that our device is also applicable to nonvolatile photo memory.
authors: Institute of Physics and Applied Physics, Yonsei University , 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea.
authors: Junyeong
authors: J
authors: Lee
authors: Ji Hoon
authors: JH
authors: Park
authors: Young Tack
authors: YT
authors: Lee
authors: Pyo Jin
authors: PJ
authors: Jeon
authors: Hee Sung
authors: HS
authors: Lee
authors: Seung Hee
authors: SH
authors: Nam
authors: Yeonjin
authors: Y
authors: Yi
authors: Younjoo
authors: Y
authors: Lee
authors: Seongil
authors: S
authors: Im
mesh_terms: D004247:DNA / Q000737:chemistry*; D006147:Guanine / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D014173:Transistors, Electronic
chemical_list: D010087:Oxides; D006147:Guanine; D006859:Hydrogen; D004247:DNA