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Kim, Dojin,Lee, Seokmin,Ko, Yongmin,Kwon, Cheong Hoon,Cho, Jinhan unknown 2018 Nano energy Vol.44 No.-
<P><B>Abstract</B></P> <P>We introduce a layer-by-layer (LbL) assembly-induced triboelectric nanogenerator (TENG) with a high and stable electric output under a wide range of humidity conditions. In this study, highly porous (cationic poly(allylamine hydrochloride) (PAH)/anionic poly(acrylic acid) (PAA))<SUB>n</SUB> multilayer films were prepared via a pH-controlled electrostatic LbL assembly with a subsequent acid treatment and were used as a mold for the triboelectric poly(dimethylsiloxane) (PDMS) replica. The electrical output of the TENGs composed of a protuberant PDMS plate and Al electrodes significantly increased based on the evolution of the nano-/micro-structured PDMS bumps. Particularly, the protuberant PDMS film molded from the porous (1.5mgmL<SUP>−1</SUP> PAH/0.5mgmL<SUP>−1</SUP> PAA)<SUB>20</SUB> multilayers displayed a high open-circuit voltage output of 242V and a short-circuit current density of 16.2μAcm<SUP>−2</SUP> under a compressive force of 90N in a relative humidity (RH) of 20%. When this hierarchical PDMS surface was additionally modified by fluorine self-assembled monolayer, the voltage output and current density of the resultant TENG at the same experimental conditions were increased up to approximately 288V and 17μAcm<SUP>−2</SUP>, respectively, exhibiting a remarkably high humidity-resistant electrical performance (16% loss of the initial voltage at 80% RH).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Triboelectric nanogenerator was based on electrostatic LbL-assembly. </LI> <LI> Electrical performance was modulated by the porosity of multilayer films. </LI> <LI> PDMS plate with hierarchical surface morphology induced highly humidity-resistant electric performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>We prepared a layer-by-layer (LbL) assembly-induced triboelectric nanogenerator (TENG) with a high and stable electric output under a wide range of humidity conditions. For this study, pH-controlled polyelectrolyte multilayer films with highly porous structure were used as a mold for PDMS replica. The electric output of the resulting TENGs were significantly increased according to the evolution of nano-/micro-structured PDMS bumps.</P> <P>[DISPLAY OMISSION]</P>
Micro lens array에서의 Nano Colloid입자를 이용한 자기조립막(Self-Assembly) 형성
전준호(J. H. Jeon),전은채(E. c. Jeon),제태진(T. J. Je),이재령(J. R. Lee),장웅(W. Jang),김경국(K.-K.Kim) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.10
We propose a variation of self-assembly of micro lens array using nano colloid particle, which we term "hydrophobic of Micro Lens array(MLA) through the Inductively Coupled Plasma(ICP)" Nano colloid, to improve and quality of monolayer nanoparticle self assembly over large areas; a particle size with 500nm and of appropriate height is created. Our method is thus a combination of Nano colloid, MLA and ICP for low cost, large area.
이우진,이승민,강승균 한국마이크로전자및패키징학회 2023 마이크로전자 및 패키징학회지 Vol.30 No.2
The process of microelectromechanical system (MEMS) fabrication involves surface treatment to impart functionality to the device. Such surface treatment method is the self-assembled monolayer (SAM) technique, which modifies and functionalizes the surface of MEMS components with organic molecule monolayer, possessing a precisely controllable strength that depends on immersion time and solution concentration. These monolayers spontaneously adsorb on polymeric substrates or metal/ceramic components offering high precision at the nanoscale and modifying surface properties. SAM technology has been utilized in various fields, such as tribological property control, mass-production lithography, and ultrasensitive organic/biomolecular sensor applications. This paper provides an overview of the development and application of SAM technology in various fields. 마이크로 전자기계 시스템 공정에서 표면 처리는 공정 방법의 일환이자 디바이스에 자체적인 기능을 부여하는 역할을 한다. 특히 자기 조립 단분자층은 마이크로 전자기계 시스템 공정에서 표면 개질 및 기능화를 수행하는 표면처리 방법으로 침지 시간과 용액 농도에 따라 강도를 정밀하게 조절할 수 있는 유기 단분자막이다. 고분자 기판이나 금속/세라믹 부품에 자발적으로 흡착되어 형성되는 자기 조립 단분자층은 표면 특성의 개질 뿐만 아니라 나노스케일 단위의 높은 정밀도로 하여금 양산용 리소그래피 기술 및 초민감 유기/생체분자 센서에도 응용되고 있다. 본 논문에서는 마찰 특성의 조절부터 생체 분자의 탐침 기능까지 자기 조립 단분자층 기술이 발전되어 응용되고 있는 다양한 분야들에 대해 소개한다.