By Topic

Reflective Diffraction Gratings From Hydrogels as Biochemical Sensors

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Chun-Li Chang ; Sch. of Mech. Eng., Purdue Univ., West Lafayette, IN, USA ; Zhenwen Ding ; Patchigolla, V.N.L.R. ; Ziaie, B.
more authors

We report reflective diffraction gratings made from smart hydrogels for ultrasensitive biochemical detection. As an example for a stimuli-responsive hydrogel, we chose a pH-sensitive hydrogel to construct diffraction gratings that swell/shrink reversibly due to changes in pH. Interferometric analysis of the grating enabled detection of the hydrogel's motions with nanoscale precision and resulted in a resolution of 6 × 10-4 pH units. The developed system is remarkably simple both to fabricate and operate, and yet extremely sensitive. Moreover, the concept of the reflective hydrogel grating is generic and can be applied detection of a wide range of other stimuli.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 7 )