Journal Article

PUBDB-2021-00624

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Diphenylalanine Nanotube Coated Fiber Bragg Grating for Methanol Vapor Detection

Corotti, R. D. P. ; Cunha, B. B. ; Barreto, R. C. ; Coelho Conceicao, A. L.Extern*DESY* ; Kamikawachi, R. (Corresponding author)Extern*

2020
IEEE New York, NY

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Please use a persistent id in citations: doi:10.1109/JSEN.2019.2946123

Abstract: Etched fiber Bragg grating (EFBG) was coated with diphenilalanine nanotubes (DNT) to produce sensors capable of detecting methanol in methanol-ethanol blend vapors. The DNT was studied in two phases, hexagonal and orthorhombic, which were observed by Raman spectroscopy and scanning electron microscopy (SEM). The temperature transition between the phases was determined through small angle x-ray scattering (SAXS). Considering the methanol concentration in the vapor, the orthorhombic phase showed a sensitivity of -7.3 ± 0.8pm / (%v/v), which was 33 times greater than that observed for the hexagonal phase, with approximately the same response time. The maximum wavelength shift measured was -0.98 ± 0.02nm. Additionally, we proposed a mathematical model to describe the sensor's response, and we hypothesized the mechanisms that could lead to its nonlinear behavior.

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Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PET-D)

Research Program(s):

1. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2020

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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