지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The alignments of polystyrene particles of $1{\mu}m$ and $5{\mu}m$ sizes in an aqueous colloidal system were observed by varying the electric field strength, the frequency and the water flow. Spherical mono-dispersed polystyrene particles dispersed in pure water were put into a perfusion chamber; an AC electric field was applied to the Au/Cr electrodes with a 4 mm gap on the glass substrate. The mixture of the $1{\mu}m$ and $5{\mu}m$ sized polystyrene particles at 0.5 vol% concentrations for each size was set in the dielectrophoresis conditions of 1 kHz and 150 V/cm. Large particles of $5{\mu}m$ size were aligned to form chains as the result of the dielectrophoresis force interaction. On the contrary, small particles of $1{\mu}m$ size did not form chains because the dielectrophoresis force was not sufficiently large. When the electric field increased to 250 V/cm, small particles were able to form chains. After the chains were formed from both large and small particles, they began to coalescence as time passed. Owing to the electroosmotic flow of water, wave patterns along the perpendicular direction of the applied electric field appeared at the conditions of 200 Hz and 50 V/cm, when the dielectrophoresis force was small. This wave pattern also appeared for small particles at 1 kHz and 150 V/cm conditions due to the flow of solvent when water was forced to circulate.
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참고문헌 (16)
참고문헌 신청
H. Morgan / 2003 / AC Electrokinetics: colloids and nanoparticles / Research Studies Press Ltd. :1~14
P. C. H. Li / 2006 / Microfuidic Lab-on-a-Chip for Chemical and Biological Analysis and Discovery / Taylor & Francis :277~280
P. Tabeling / 2005 / Introduction to Microfluidics / Oxford University Press :211~214
E. Delamarche / 2005 / Adv. Mater. 17:2911
E. Chmela / 2002 / Anal. Chem. 74:3470
P. C. H. Li / 2006 / Microfuidic Lab-on-a-Chip for Chemical and Biological Analysis and Discovery / Taylor & Francis :277~280
P. Tabeling / 2005 / Introduction to Microfluidics / Oxford University Press :211~214
E. Delamarche / 2005 / Adv. Mater. 17:2911
E. Chmela / 2002 / Anal. Chem. 74:3470
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