Blood vessels in central nervous system act as a great hurdle for drug delivery to the human brain. They only allow passage of water, some gases, lipid molecules, glucose and amino acid by selective transporte...
Authors: Bohye Chung, Jaehoon Kim, Hui-Wen Liu, Jiyoung Nam, Hyunho Kim, Hyun Jeong Oh, Yong Ho Kim and Seok Chung
Herein, we present a facile fabrication method to prepare the optically transparent, flexible and self-cleanable poly(urethane acrylate) (PUA) superhydrophobic film. The low surface energy siloxane functionali...
Authors: Tian-Feng Hou, Arunkumar Shanmugasundaram, Bui Quoc Huy Nguyen and Dong-Weon Lee
We have rationally designed and developed a fully automated desktop furnace system that enables programmable chemical vapour deposition growth of carbon nanotubes with controlled height, density, and pattern a...
Authors: Ju Hyun Ahn, Minho Na, Sungkwan Koo, Hyunsoo Chun, Inhwan Kim, Jong Won Hur, Jae Hyuk Lee and Jong G. Ok
In this study, we demonstrate an on-demand delivering and sequential arraying of single microparticles utilizing multiple pneumatic pressure-driven elastomer valves and a deterministic particle arraying mechan...
Authors: Sanghyun Lee, Hojin Kim, Wonhyung Lee and Joonwon Kim
This paper reports bimodal operation of microchannel resonators towards measurements of properties associated with energy dissipation resulting from travelling particles along with their buoyant masses. Two in...
Implementing 3D surface imaging camera systems into miniaturized devices for a variety of 3D applications such as movement recognition, object sensing, and 3D endoscopy has received great attention over the pa...
Authors: Sung-Pyo Yang, Yeong-Hyeon Seo, Jae-Beom Kim, Hyunwoo Kim and Ki-Hun Jeong
We propose a novel localized surface plasmon resonance (LSPR) sensor system based on polymer material. The proposed LSPR system consists of the incident medium with low-loss polymer waveguide and the chemicall...
Authors: Hyeong-Min Kim, Jae-Hyoung Park and Seung-Ki Lee
The influence of the air atmosphere on the electrical conductivity of nanocrystalline thin SiC films obtained by method of direct ion deposition on sapphire was studied. Measurements were performed on two seri...
Authors: Alexander Semenov, Anatolii Kozlovskyi, Stanislav Skorik and Denis Lubov
A polymer-based tactile sensor with flexibility and multi-directional sensing capability is presented. The proposed sensor consists of a polydimethylsiloxane (PDMS) bump, a polyimide (PI) substrate, Cr/Au elec...
Authors: Soonjae Pyo, Jae-Ik Lee, Min-Ook Kim, Hyung-Kew Lee and Jongbaeg Kim
This work presents a flexible cable-shaped supercapacitor based on carbon fibers (CFs) coated with graphene flakes (GFs) for wearable electronic applications. The CF bundles were adopted as base materials and ...
Authors: Jiyoung Kim, Junli Yin, Xing Xuan and Jae Yeong Park
This paper presents a light detection and ranging (LIDAR) system using electromagnetically actuated two-axis scanning micromirror. The distance measurement with the LIDAR is based on the indirect time-of-fligh...
Authors: Seung-Han Chung, Sung-Woo Lee, Seung-Ki Lee and Jae-Hyoung Park
This study proposes the unique method to analyze the cleanliness of the fine metal mask (FMM) used in OLED display manufacturing after FMM cleaning process. We developed a FMM-mimic microstructure as a substit...
Authors: Yong-Cheol Jeong, Jun-Ho Yu, Kwon-Yong Shin, Sol Lee, Chang-Ro Yoon and Sang-Ho Lee
This paper investigates the change of the relative magnitudes of force and impulse components generated by the rotational motion of a hydrophobic carbon rod moving into water from the water surface, by varying...
Authors: Sun Gi Park, Min Chul Lee, Hyeong Jun Tak and Jong Soo Ko
The coffee ring effect occurs when a droplet of a suspension evaporates on a substrate; this process can separate suspended nanoparticles (NPs) by size as a result of geometric constraints at the contact line ...
Authors: Johan Yi, Hwapyeong Jeong and Jaesung Park
This work reports the development of a field-deployable and fully handheld fluorometer for environmental water monitoring. Our developed fluorimeter can detect both green algae and cyanobacteria (blue-green al...
Authors: Young-Ho Shin, M. Teresa Gutierrez-Wing and Jin-Woo Choi
Here, we develop a flexible microrobot enhancing the steerability of a conventional guidewire. To improve steerability, a microrobot is attached to the tip of the guidewire and guided using an external magneti...
Authors: Sungwoong Jeon, Ali Kafash Hoshiar, Sangwon Kim, Seungmin Lee, Eunhee Kim, Sunkey Lee, Kangho Kim, Jeonghun Lee, Jin-young Kim and Hongsoo Choi
We present a photolithography scheme for ultra-tall, high-aspect-ratio microstructures. While increased height of microstructures can expand the design capability of various microdevices, it has been challengi...
Authors: Jungkwun J. K. Kim, Hassan Al Thuwaini and Mohammad Almuslem
In this paper, a stress and fracture study, occurring during the chemical mechanical polishing (CMP) of anodically bonded substrates is presented. The samples contain glass pillars, used to form the glass cavi...
Authors: Sung-min Sim, Yeonsu Lee, Hye-Lim Kang, Youngsuk Hwang, Chi-Hyun Park, Ignacio Llamas-Garro and Jung-Mu Kim
In this paper, we characterized the behavior of polymer jet from near-field electrospinning onto the inkjet patterned paper with conductive Ag nanoparticles in order to form the controlled three-dimensional na...
Authors: Jinseong Kim, Bohee Maeng and Jungyul Park
In this research, we present the feasibility testing results of a simple distance measurement system using microfabricated scanning micromirrors. Two different configurations have been tested with different ty...
Authors: Kyoungeun Kim, Jungyeon Hwang and Chang-Hyeon Ji
A volatile organic compound (VOC) sensor array based on metal oxide nanoparticles (MOX NPs) functionalized by metalloporphyrins (MPPs) was demonstrated. The VOC sensor array was composed of four single sensors...
Authors: Byeonghwa Cho, Kyounghoon Lee, Soonjae Pyo and Jongbaeg Kim
In the present study, a screen-printed electrode based-sensor with electrochemical detection was developed for rapid and sensitive determination of acetylcholine. At first, the screen-printed carbon electrode ...
Authors: Sayed Zia Mohammadi, Hadi Beitollahi and Somayeh Tajik
This paper reports the first demonstration of hydrogel conical tip attachment onto quartz tuning fork (QTF) by using an elastomeric tip mold that is soft-lithographically replicated from an electrochemically e...
Authors: Juhee Ko, Amun Jarzembski, Keunhan Park and Jungchul Lee
A catalytic combustible type single-chip micro gas sensor was fabricated by MEMS technology and responses with input powers and methane and hydrogen gas concentrations were characterized. The ranges of respons...
Authors: Woongjin Jang, Joon-Shik Park, Ki-Won Lee and Yonghan Roh
This study aims to propose a new fabrication method for an ohmic contact type RF-MEMS switch with Au–Au/carbon nanotube (CNT)-composite contacts. These contacts are proposed to improve the reliability and the ...
Authors: Tomoaki Kageyama, Koichi Shinozaki, Lan Zhang, Jian Lu, Hideki Takaki and Sang-Seok Lee
Thanks to the excellent barrier property and fabrication accessibility, Parylene has been actively used in the microelectromechanical system. An ultra-thin Parylene film with thickness smaller than 100 nm is u...
Authors: Yaoping Liu, Dongyang Kang, Wangzhi Dai, Haida Li, Wei Wang and Yu-Chong Tai
Silicon wet anisotropic etching based bulk micromachining technique is widely used for the fabrication of microelectromechanical systems components. In this technique of microfabrication, alignment of mask edg...
Authors: Avvaru Venkata Narasimha Rao, Veerla Swarnalatha, Ashok Kumar Pandey and Prem Pal
Droplet microfluidics has emerged as a promising technique to perform high-throughput, massively-parallel chemical and molecular biological reactions. Droplet microfluidic operations such as droplet generation...
Contemporary biomedical research requires development of novel techniques for sorting and manipulation of cells within the framework of a microfluidic chip. The desired functions of a microfluidic chip are ach...
Authors: Arslan Atajanov, Alexander Zhbanov and Sung Yang
This study presents a finger-triggered portable polydimethylsiloxane suction cup that enables equipment-free microfluidic pumping. The key feature of this method is that its operation only involves a “pressing...
Authors: Sanghyun Lee, Hojin Kim, Wonhyung Lee and Joonwon Kim
Microprobes are used to repair neuronal injury by recording electrical signals from neuronal cells around the surface of the device. Following implantation into the brain, the immune response results in format...
Authors: Eunhee Kim, Jin-Young Kim and Hongsoo Choi
This paper presents results for dispensing living cells using a pneumatic dispensing system to verify the feasibility of using this system to fabricate biomaterials. Living cells (i.e., mouse 3T3-J2 fibroblast...
Pt thin film temperature sensors (Pt T sensors) are embedded in micro gas sensors to measure and control the working temperature. We characterized electrical resistances of Pt T sensors and micro heaters with ...
Authors: Jun-gu Kang, Joon-Shik Park, Kwang-Bum Park, Junho Shin, Eung-An Lee, Sangsoo Noh and Hoo-Jeong Lee
This paper proposes a device level solution to achieve linear frequency tuning with respect to a tuning voltage (Vtune) sweep in an inductor (L)–capaci...
Authors: Chang-Hoon Han, Yong-Hoon Yoon, Seung-Deok Ko, Min-Ho Seo and Jun-Bo Yoon
This letter reports two novel electrode design considerations to satisfy two very important aspects of EWOD operation—(1) Highly consistent volume of generated droplets and (2) Highly improved accuracy in the gen...
Authors: N. Y. Jagath B. Nikapitiya, Mun Mun Nahar and Hyejin Moon
Anisotropic wet etching is a most widely employed for the fabrication of MEMS/NEMS structures using silicon bulk micromachining. The use of Si{110} in MEMS is inevitable when a microstructure with vertical sid...
Authors: A. V. Narasimha Rao, V. Swarnalatha and P. Pal
Cardiovascular disease is a very serious disease which results in about 30% of all global mortality. Atrial fibrillation (AF) causes rapid and irregular contractions resulting in stroke and cardiac arrest. AF ...
We present a facile method for the preparation of polyethyleneglycol diacrylate (PEG-DA) hydrogels with plasmonic gold (Au) nanospheres incorporated for various biological and chemical sensing applications. Pl...
Authors: Dinesh Veeran Ponnuvelu, Seokbeom Kim and Jungchul Lee
This paper presents a micro-fabricated flexible and curled PZT [Pb(Zr0.52Ti0.48)O3] cantilever using d33 piezoelectric mode for vibration based energy harvesting applications. The proposed cantilever based energy...
Authors: Hyunok Cho, Jongcheol Park and Jae Yeong Park
Despite many efforts to create nanogratings to exploit exceptionally enhanced nano-sized effects, realizing sub-10 nm nanogratings on a large area still remains a great challenge. Herein, we demonstrate fabric...
Authors: Min-Seung Jo, Kwang-Wook Choi, Min-Ho Seo and Jun-Bo Yoon
We present a simple and scalable fluidic-assembly approach, in which bundles of single-walled carbon nanotubes (SWCNTs) are selectively aligned and deposited by directionally controlled dip-coating and solvent...
Biofilm formed on the surface of the object by the microorganism resulting in fouling organisms. This has led to many problems in daily life, medicine, health and industrial community. In this study, we tried ...
Extracellular vesicles (EVs) are small membrane-bound bodies that are released into extracellular space by diverse cells, and are found in body fluids like blood, urine and saliva. EVs contain RNA, DNA and pro...
Wireless power transmission was conceptualized nearly a century ago. Certain achievements made to date have made power harvesting a reality, capable of providing alternative sources of energy. This review prov...
Authors: Le-Giang Tran, Hyouk-Kyu Cha and Woo-Tae Park
A microbial fuel cell (MFC) is a bioinspired energy converter which directly converts biomass into electricity through the catalytic activity of a specific species of bacteria. The effect of temperature on a m...
Highly reactive integrated material systems have recently gained attention, as they promise a feasible tool for heterogeneous integration of micro electromechanical systems. As integrated energy sources they c...
Authors: Matthias P. Kremer, Ali Roshanghias and Andreas Tortschanoff
Ion concentration polarization (ICP) has been widely studied for collecting target analytes as it is a powerful preconcentrator method employed for charged molecules. Although the method is quite robust, simpl...
Authors: Kyungjae Lee, Yong Kyoung Yoo, Sung Il Han, Junwoo Lee, Dohwan Lee, Cheonjung Kim and Jeong Hoon Lee
High throughput nanomanufacturing of photopatternable nanofibers and subsequent photopatterning is reported. For the production of high density nanofibers, the tube nozzle electrospinning (TNE) process has bee...
Authors: Sheng-Po Fang, PitFee Jao, David E. Senior, Kyoung-Tae Kim and Yong-Kyu Yoon
We herein report on a simple and novel method of refractometry that uses a micro image defocusing technique. This simple method makes use of a three-pinhole aperture attached to a microscopic optical system. I...
Authors: Sang Youl Yoon, Ji-chul Hyun and Sung Yang
