Stabilization of Ion Concentration Polarization Using a Heterogeneous Nanoporous Junction

被引：93

作者：

Kim, Pilnam ^{[2
]}

Kim, Sung Jae ^{[1
]}

Han, Jongyoon ^{[1
,4
]}

Suh, Kahp Y. ^{[2
,3
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151742, South Korea

[3] Seoul Natl Univ, World Class Univ Program Multiscale Mech Design, Seoul 151742, South Korea

[4] MIT, Dept Biol Engn, Cambridge, MA 02139 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 01期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Concentration polarization; nanofluidics; ionic hydrogel; electrokinetics; stabilization; ELECTROKINETIC CONCENTRATION ENRICHMENT; FUEL-CELL; PERMSELECTIVE MEMBRANE; SENSITIVE HYDROGELS; NANOFLUIDIC DIODE; CHIP; NANOCHANNELS; ENHANCEMENT; PROPAGATION; FABRICATION;

D O I：

10.1021/nl9023319

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate a recycled ion-flux through heterogeneous nanoporous junctions, which induce stable ion concentration polarization with an electric held. The nanoporous junctions are based on integration of ionic hydrogels whose surfaces are negatively or positively charged for cationic or anionic selectivity, respectively. Such heterogeneous junctions can be matched up in a way to achieve continuous ion-flux operation for stable concentration gradient or ionic conductance. Furthermore, the combined junctions can be used to accumulate ions on a specific region of the device.

引用

页码：16 / 23

页数：8

共 38 条

[1] Nanofluidic diode and bipolar transistor [J].

Daiguji, H ;

Oka, Y ;

Shirono, K .

NANO LETTERS, 2005, 5 (11) :2274-2280

[2] Electrokinetic concentration enrichment within a microfluidic device using a hydrogel microplug [J].

Dhopeshwarkar, R ;

Li, SA ;

Crooks, RM .

LAB ON A CHIP, 2005, 5 (10) :1148-1154

[3] Transient effects on microchannel electrokinetic filtering with an ion-permselective membrane [J].

Dhopeshwarkar, Rahul ;

Crooks, Richard M. ;

Hlushkou, Dzrnitry ;

Tallarek, Ulrich .

ANALYTICAL CHEMISTRY, 2008, 80 (04) :1039-1048

[4] Adaptive liquid microlenses activated by stimuli-responsive hydrogels [J].

Dong, Liang ;

Agarwal, Abhishek K. ;

Beebe, David J. ;

Jiang, Hongrui .

NATURE, 2006, 442 (7102) :551-554

[5] The influence of membrane ion-permselectivity on electrokinetic concentration enrichment in membrane-based preconcentration units [J].

Hlushkou, Dzmitry ;

Dhopeshwarkar, Rahul ;

Crooks, Richard M. ;

Tallarek, Ulrich .

LAB ON A CHIP, 2008, 8 (07) :1153-1162

[6] On-chip millionfold sample stacking using transient isotachophoresis [J].

Jung, B ;

Bharadwaj, R ;

Santiago, JG .

ANALYTICAL CHEMISTRY, 2006, 78 (07) :2319-2327

[7] Electrostatic control of ions and molecules in nanofluidic transistors [J].

Karnik, R ;

Fan, R ;

Yue, M ;

Li, DY ;

Yang, PD ;

Majumdar, A .

NANO LETTERS, 2005, 5 (05) :943-948

[8] Hydrogel-based reconfigurable components for microfluidic devices [J].

Kim, Dongshin ;

Beebe, David J. .

LAB ON A CHIP, 2007, 7 (02) :193-198

[9] Fabrication of non-biofouling polyethylene glycol micro- and nanochannels by ultraviolet-assisted irreversible sealing [J].

Kim, Pilnam ;

Jeong, Hoon Eui ;

Khademhosseini, Ali ;

Suh, Kahp Y. .

LAB ON A CHIP, 2006, 6 (11) :1432-1437

[10] Self-sealed vertical polymeric nanoporous-junctions for high-throughput nanofluidic applications [J].

Kim, Sung Jae ;

Han, Jongyoon .

ANALYTICAL CHEMISTRY, 2008, 80 (09) :3507-3511

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