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Updated: Jun 22, 2026
13:02
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
Enhanced electrophoretic DNA separation in photonic crystal fiber
Yi Sun1, Nam-Trung Nguyen, Yien Chian Kwok
1National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore, 637616, Singapore.
Analytical and Bioanalytical Chemistry
|May 28, 2009
Summary
Incorporating photonic crystal fiber into capillary electrophoresis chips significantly reduces Joule heating. This method improves DNA fragment separation resolution by enhancing heat dissipation through numerous narrow channels.
Area of Science:
- Analytical Chemistry
- Microfluidics
- Biotechnology
Background:
- Joule heating in capillary electrophoresis (CE) creates temperature gradients, negatively impacting separation quality.
- High surface-to-volume ratio is crucial for efficient thermal management in microscale devices.
Purpose of the Study:
- To introduce a novel method for mitigating Joule heating in CE.
- To enhance the resolution and efficiency of electrophoretic separations.
Main Methods:
- Integration of a photonic crystal fiber (PCF) containing 54 narrow capillaries into a micro CE chip.
- Simultaneous and independent electrophoretic separation of DNA fragments within the PCF's microchannels.
- Utilizing the PCF's high surface-to-volume ratio for improved heat dissipation.
Main Results:
- The capillary bundle chip demonstrated significantly more efficient heat dissipation compared to conventional CE chips.
- Notable improvements in separation resolution were achieved under identical electrical field strengths.
- The PCF effectively minimized temperature gradients along the separation channels.
Conclusions:
- Photonic crystal fiber integration is a viable strategy for reducing Joule heating in CE.
- This approach offers enhanced performance for microchip electrophoresis, particularly for DNA fragment analysis.
- The high surface-to-volume ratio of the PCF's microchannels is key to its thermal management benefits.
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