Spatially selective DNA deposition on the fiber core by optically trapping an aqueous droplet and its application for ultra-compact DNA Fabry-Perot temperature sensor

Sensors and Actuators Reports

卷:3

Seongjin Hong¹  Hayoung Jeong¹  Byungjoo Kim²  Kyunghwan Oh²  Yong Soo Lee² 

[1] Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea;

[2] Photonics Device Physics Laboratory, Institute of Physics and Applied Physics, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul 03722, South Korea;

关键词: Biomaterial;    Deoxyribonucleic acid (DNA);    Optical fiber sensor;    Temperature sensor;   

DOI  :  

来源: DOAJ

【 摘 要 】

We developed a new method to deposit deoxyribonucleic acid (DNA) solid film selectively only on the core of an optical fiber facet with a variable thickness, by optically trapping an aqueous DNA droplet during an optimal drying process. We experimentally demonstrated an ultra-compact DNA Fabry-Perot interferometer (FPI) on the fiber core in a columnar shape with a diameter of ~10 μm and variable height from 2.0 to 4.5 μm. Utilizing the highly confined DNA-FPI and its unique thermo-optical properties with a large negative thermo-optical coefficient of -5.91 × 10−4/ °C at λ = 1550 nm, we realized a very large temperature sensitivity of -2.42 nm/ °C in the spectral domain and a power change of -0.43 dB/ °C in the biologically important temperature range from 30 to 80 °C. The proposed sensor also showed a fast temporal response with an average rise time of 0.62 s and fall times of 1.16 s. The proposed device structure can be readily applied in situ real-time temperature monitoring applications in microscopic environment as well as in various bio-chemical sensing.

【 授权许可】

Unknown