Controlled self-assembly of quantum dots and block copolymers in a microfluidic device

被引：48

作者：

Schabas, Greg ^{[2
]}

Yusuf, Huda ^{[1
]}

Moffitt, Matthew G. ^{[1
]}

Sinton, David ^{[2
]}

机构：

[1] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada

[2] Univ Victoria, Dept Mech Engn, Victoria, BC V8W 3P6, Canada

来源：

LANGMUIR | 2008年 / 24卷 / 03期

关键词：

D O I：

10.1021/la703297q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The controlled self-assembly of polymer-stabilized quantum dots (QDs) into mesoscale aqueous spherical assemblies using microfluidics is described. In a flow-focusing configuration, self-assembly is initiated by the addition of water to a blended solution of polystyrene-coated QDs and amphiphilic polystyrene-block-poly(acrylic acid) stabilizing chains and terminated in a downstream quench step. The on-chip evolution of assemblies is monitored through fluorescence microscopy, and particle size distributions are determined off-chip by transmission electron microscopy. On-chip size control of the assemblies is demonstrated via both the average water concentration in the channel and the flow rate.

引用

页码：637 / 643

页数：7

共 34 条

[11] Femtomole mixer for microsecond kinetic studies of protein folding [J].

Hertzog, DE ;

Michalet, X ;

Jäger, M ;

Kong, XX ;

Santiago, JG ;

Weiss, S ;

Bakajin, O .

ANALYTICAL CHEMISTRY, 2004, 76 (24) :7169-7178

[12] Experimental and theoretical scaling laws for transverse diffusive broadening in two-phase laminar flows in microchannels [J].

Ismagilov, RF ;

Stroock, AD ;

Kenis, PJA ;

Whitesides, G ;

Stone, HA .

APPLIED PHYSICS LETTERS, 2000, 76 (17) :2376-2378

[13] Controlled vesicle self-assembly in microfluidic channels with hydrodynamic focusing [J].

Jahn, A ;

Vreeland, WN ;

Gaitan, M ;

Locascio, LE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (09) :2674-2675

[14] Quantitative analysis of molecular interaction in a microfluidic channel: The T-sensor [J].

Kamholz, AE ;

Weigl, BH ;

Finlayson, BA ;

Yager, P .

ANALYTICAL CHEMISTRY, 1999, 71 (23) :5340-5347

[15] Magnetomicelles: Composite nanostructures from magnetic nanoparticles and cross-linked amphiphilic block copolymers [J].

Kim, BS ;

Qiu, JM ;

Wang, JP ;

Taton, TA .

NANO LETTERS, 2005, 5 (10) :1987-1991

[16] On-line analysis of CdSe nanoparticle formation in a continuous flow chip-based microreactor [J].

Krishnadasan, S ;

Tovilla, J ;

Vilar, R ;

deMello, AJ ;

deMello, JC .

JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (17) :2655-2660

[17] Nanoparticle assembly and transport at liquid-liquid interfaces [J].

Lin, Y ;

Skaff, H ;

Emrick, T ;

Dinsmore, AD ;

Russell, TP .

SCIENCE, 2003, 299 (5604) :226-229

[18] Automated formation of lipid-bilayer membranes in a microfluidic device [J].

Malmstadt, Noah ;

Nash, Michael A. ;

Purnell, Robert F. ;

Schmidt, Jacob J. .

NANO LETTERS, 2006, 6 (09) :1961-1965

[19] Spherical assemblies of semiconductor nanoparticles in water-soluble block copolymer aggregates [J].

Moffitt, M ;

Vali, H ;

Eisenberg, A .

CHEMISTRY OF MATERIALS, 1998, 10 (04) :1021-1028

[20] Diffusion based analysis in a sheath flow microchannel: the sheath flow T-sensor [J].

Munson, MS ;

Hawkins, KR ;

Hasenbank, MS ;

Yager, P .

LAB ON A CHIP, 2005, 5 (08) :856-862

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