Issue 20, 2011
From the journal:

Lab on a Chip

Microfluidic formation of pH responsive 5CB droplets decorated with PAA-b-LCP†

Waliullah Khan,a   Jin Ho Choi,b   Gyu Man Kimb  and  Soo-Young Park*a  

* Corresponding authors

a Department of Polymer Science, Kyungpook National University, #1370 Sangyuk-dong, Buk-gu, Daegu, South Korea
E-mail: psy@knu.ac.kr
Fax: +82-53-950-6623
Tel: +82-53-950-5630

b School of Mechanical Engineering, Kyungpook National University, #1370 Sangyuk-dong, Buk-gu, Daegu, South Korea

Abstract

We are reporting for the first time the pH responsiveness of liquid crystal (LC) microdroplets decorated with an amphiphilic block copolymer of PAA-b-LCP. We successfully demonstrated the adsorption of block copolymer on LC droplets by fluorescence microscopy and pH response to the radial-to-bipolar orientational change of the LC droplets by changing pH from 12 to 2 through the polarized optical microscope (POM). We believe that our results may pave the way for the generation of monodisperse droplets decorated by various amphiphilic block copolymers which respond to several kinds of the external stimuli. These developments may be important for potential applications of the LC droplets in sensing and encapsulation fields.

Graphical abstract: Microfluidic formation of pH responsive 5CB droplets decorated with PAA-b-LCP

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Article information

DOI
https://doi.org/10.1039/C1LC20402E
Article type
Paper
Submitted
11 May 2011
Accepted
03 Aug 2011
First published
26 Aug 2011

Lab Chip, 2011,11, 3493-3498

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Microfluidic formation of pH responsive 5CB droplets decorated with PAA-b-LCP

W. Khan, J. H. Choi, G. M. Kim and S. Park, Lab Chip, 2011, 11, 3493 DOI: 10.1039/C1LC20402E

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