http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A highly efficient 3D micromixer using soft PDMS bonding
Cha, Junghun,Kim, Jinseok,Ryu, Suk-Kyu,Park, Jungyul,Jeong, Yongwon,Park, Sewan,Park, Sukho,Kim, Hyeon Cheol,Chun, Kukjin IOP 2006 JOURNAL OF MICROMECHANICS AND MICROENGINEERING - Vol.16 No.9
<P>This paper presents a novel highly efficient passive micromixer that employs diffusion for micromixing. Since conventional fabrication methods cannot form precise aligned microchannels, the realization of a complex 3D micromixer has been difficult. Here, we report a novel micromixer, named a chessboard mixer. In addition, a new polydimethylsiloxane (PDMS) bonding method was developed to produce the proposed mixer. The new PDMS bonding technique requires PDMS-to-PDMS bonding and the moldable flexibility of partially cured PDMS to form the structure. Accordingly, a two-step curing process was used to solve these problems. Adhesion control was also considered when forming the PDMS membranes. Complex 3D microchannels in the micromixer were aligned within 1 m using the proposed new bonding method. The presented micromixer could increase the mixing effect by expanding interfaces between mixing fluids. Thus, this mixer makes it possible to mix within a shorter distance than other pre-existing micromixers do. A simulation using computational fluid dynamics (CFD)-ACE software showed a highly efficient performance, and an experiment involving the mixing of NaOH and phenolphthalein confirmed the rapid mixing performance (<1400 ?m).</P><P>Corrections were made to the authors' affiliations on 27 July 2006. The corrected electronic version is identical to the print version.</P>
Mechanotransduction of cardiomyocytes interacting with a thin membrane transducer
Park, Jungyul,Kim, Il Chaek,Cha, Jaemin,Park, Sukho,Lee, Junghoon,Kim, Byungkyu IOP 2007 JOURNAL OF MICROMECHANICS AND MICROENGINEERING - Vol.17 No.6
<P>A novel platform is developed to study the mechanotransduction of cardiomyocytes. After the cardiomyocytes are seeded on 10 ?m thin, dome-shaped membranes with different sizes, their morphology and beating frequency are monitored. While the cells seeded on a larger membrane (800 ?m ? 800 ?m) grow normally, cells on a smaller membrane (200 ?m ? 200 ?m) grow in isolated groups, showing a lumped morphology. The beating frequency of the cells on the smaller membrane was faster than on the larger membrane. This intriguing phenomenon may be explained by the mechanical stress determined by the area of the membrane that affects the opening of ion channels.</P>