Details

Autor(en) / Beteiligte

• Mishra, A.
• Désévédavy, F.
• Petit, L.
• Smektala, F.
• Massera, J.

Titel

Core-clad phosphate glass fibers for biosensing

Ist Teil von

• Materials Science & Engineering C, 2019-03, Vol.96, p.458-465

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Recently, a phosphate glass with composition 20 CaO-20 SrO-10 Na2O-50 P2O5 (mol%) was found to have good potential as a biomaterial and to possess thermal properties suitable for fiber drawing. This study opened the path towards the development of fully bioresorbable fibers promising for biosensing. In the past, this phosphate glass with CeO2 was found to increase the refractive index and the glass stability. Therefore, a new SrO-containing glass was prepared with 1 mol% of CeO2 and core fibers were drawn from it. A core-clad fiber was also processed, where the core was a Ce-doped glass and the clad undoped, to allow for total internal reflection. The mechanical properties of the core and core-clad fibers are discussed as a function of immersion time in TRIS-buffer solution. Finally, a sensing region was created, in the core-clad fiber, by etching the cladding using phosphoric acid. Then, the change in light transmission, upon immersion in TRIS-buffer solution, was quantified to assess the potential use of the novel core-clad fiber as a biosensor. Upon immersion in TRIS, the core-clad fiber was found to guide light effectively and to maintain a tensile strength of ~150–200 MPa up to 6 weeks in TRIS, clearly showing that this fiber has potential as a biosensing device. •Effect of fiber geometry (core vs core-clad) on the tensile strength, Young’s modulus and Weibull modulus.•Development of a protocol to etch away the cladding (of core-clad fibers) to generate a sensing region.•Impact of glass immersion in TRIS buffer solution on the optical properties of the etched core-clad fiber.•Impact of etching on the mechanical properties was also investigated.