کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7133329 | 1461824 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface functionality and optical properties impact of phenol red dye on mesoporous silica matrix for fiber optic pH sensing
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Phenol red dye (PR) functionalized mesoporous silica matrix nano-structures/ nano-tubes (MSNs) are synthesized by sol-gel method for pH sensing. FE-SEM analysis revealed formation of different nano-objects (i.e. nano-clusters and nano-tubes) with defined pores, which are arranged into bunch of nanotubes after PR encapsulation. AFM analysis shows the crack-free dense matrices films with low average surface roughness and thickness. XRD and FTIR exhibited the interaction/bonding of phenolic anchoring groups of PR with silica. HRTEM analysis confirms the formation of crystalline nano-tubes after PR encapsulation within silica matrix. TGA/DTA analysis shows PR dye interacts efficiently within the silica matrix species from 300â¯Â°C - 1000â¯Â°C. N2 adsorption isotherms confirms the meso-porous nature of the PR encapsulated silica matrix have high surface area value of 434 m2/g with a pore volume of 0.96 cm3/g. UV-vis analysis exhibited that silica matrix has transmission of 84% at 550â¯nm and 1.36 refractive index. However, transmission is reduced to 79% whilst refractive index increased to 1.37 at 550â¯nm after PR encapsulation. Coated fiber optic displayed dynamic range of 1-10â¯pH with fast response time (<50â¯s). In conclusion, these structural, physicochemical, thermal and optical characteristics of synthesized PR encapsulated silica matrix film could serve as a prototype sensing device model leading to functional benefits in pH stimuli response behavior of opto-chemical devices and optical characteristics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 276, 15 June 2018, Pages 267-277
Journal: Sensors and Actuators A: Physical - Volume 276, 15 June 2018, Pages 267-277
نویسندگان
Shumaila Islam, Hazri Bakhtiar, Shahzad Naseem, Muhammad Safwan Bin Abd Aziz, Noriah Bidin, Saira Riaz, Jalil Ali,