کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5008988 | 1462038 | 2017 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design, fabrication and characterisation of silica-titania thin film coated over coupled long period fibre gratings: Towards bio-sensing applications
ترجمه فارسی عنوان
طراحی، ساخت و خصوصی سازی سیلیکات-تیتانا با پوشش نازک سیلیکا-تیتانا در طول ترموهای فیبر نوری طولانی: به سوی برنامه های سنجش زیست محیطی
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کلمات کلیدی
فیبر طلای طولانی، بیش از اتصال، پوشش نازک فیلم، فیلم نازک سیلیکا-تیتانا روی سول ژل، زیست شناسی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
In this paper we report on the application of over coupled long period fibre gratings (OCLPFGs) for detecting small changes in the surrounding refractive index (SRI). In addition, the optimization of a high RI (HRI) overlay deposited over the fibre for the adhesion of biological species is described. In this study, we utilised a sol-gel-based silica-titania thin film as HRI material deposited on the grating portion using the simple and versatile dip-coating (DC) technique. The OCLPFG-based sensor has been manufactured in such a way that the resonant band retains good visibility (close to the maximum coupling condition) in the transmission spectrum even after high thermal sintering of the coating material. Three different batches of OCLPFGs were produced using different withdrawal speeds and sol viscosities. By carefully tuning both the overlay thickness during the DC process and the RI of the sol-gel material during its preparation, it was possible to bring the sensor into the so-called transition mode working region, and thus maximize the sensing performance in terms of SRI changes. All devices were characterized as optical refractometers in the RI range of interest for a bio-sensing application (from 1.33 to 1.34) and, after a suitable bio-functionalisation process, one of them was used to implement a classical receptor-analyte biosensor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 253, December 2017, Pages 418-427
Journal: Sensors and Actuators B: Chemical - Volume 253, December 2017, Pages 418-427
نویسندگان
Palas Biswas, Francesco Chiavaioli, Sunirmal Jana, Nandini Basumallick, Cosimo Trono, Ambra Giannetti, Sara Tombelli, Aparajita Mallick, Francesco Baldini, Somnath Bandyopadhyay,