Optical Fiber Oxygen Sensor Based on Ru (II) Complex and Porous Silica Nanoparticles Embedded in Sol-Gel Matrix

Abstract:

This paper presents a high-sensitivity oxygen sensor that comprises an optical fibre coated at one end with tris (4, 7-diphenyl-1, 10-phenanthroline) ruthenium (II) ([Ru (dpp)₃]²⁺) and porous silica nanoparticles embedded in an n-octyltriethoxysilane (Octyl-triEOS)/tetraethylorthosilane (TEOS) composite xerogel. The sensitivity of the optical oxygen sensor is quantified in terms of the ratio I_N2/I_O2, where I_N2 and I_O2 represent the detected fluorescence intensities in pure nitrogen and pure oxygen environments, respectively. The experimental results show that the oxygen sensor has a sensitivity of 26. The experimental results show that compared to oxygen sensor based on Ru (II) complex immobilized in the sol-gel matrix, the proposed optical fibre oxygen sensor has higher sensitivity. In addition to the increased surface area per unit mass of the sensing surface, the porous silica nanoparticles increase the sensitivity because a substantial number of aerial oxygen molecules penetrate the porous silica shell. The proposed optical sensor has the advantages of easy fabrication, low cost, fast response and high sensitivity for oxygen monitoring using a cheap LED as a light source.

• Periodical: Key Engineering Materials (Volume 516)
• Pages: 612-617
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.516.612
• Online since: June 2012
• Authors: Cheng Shane Chu
• Keywords: Optical Fibre Oxygen Sensor, Porous Silica, Ru (II) Complex, Sol-Gel (SG)

References

[1] L.C. Clark, Jr., Monitor and control of blood and tissue oxygen tensions, Trans. Am. Soc. Artif. Intern. Organs. 2 (1956) 41-48.

[2] J.N. Demas, B.A. Degraff, P.B. Coleman, Oxygen sensors based on luminescence quenching, Anal. Chem. 71 (1999) 793A- 800A.

DOI: 10.1021/ac9908546

[3] K. Tsukada, S. Sakai, K. Hase, H. Minamitani, Development of catheter type optical oxygen sensor and applications to bioinstrumentation, Biosens. Bioelectron. 18 (2003) 1439-1445.

DOI: 10.1016/s0956-5663(03)00072-1

[4] E. VanderDonckt, B. Camerman, R. Herne, R. Vandeloise, Fiber-optic oxygen sensor based on luminescence quenching of a Pt(II) complex embedded in polymer matrices, Sens. Actuators B Chem. 32 (1996) 121-127.

DOI: 10.1016/0925-4005(96)80120-1

[5] S.K. Lee, I. Okura, Photostable optical oxygen sensing material: Platinum tetrakis (pentafluorophenyl) porphyrin immobilized in polystyrene, Anal. Comm. 34 (1997) 185-188.

DOI: 10.1039/a701130j

[6] A.N. Watkins, B.R. Wenner, J.D. Jordan, W.Y. Xu, J.N. Demas, F.V. Bright, Portable, low-cost, solid-state luminescence-based O2 sensor, Appl. Spectrosc. 52 (1998) 750-754.

DOI: 10.1366/0003702981944175

[7] Y. Tang, E.C. Tehan, Z. Tao, F.V. Bright, Sol-gel-derived sensor materials that yield linear calibration plots, high sensitivity, and long-term stability, Anal. Chem. 75 (2003) 2407-2413.

DOI: 10.1021/ac030087h

[8] R.M. Bukowski, R. Ciriminna, M. Pagliaro, F.V. Bright, High-performance quenchometric oxygen sensors based on fluorinated xerogels doped with [Ru(dpp)(3)](2+), Anal. Chem. 77 (2005) 2670-2672.

DOI: 10.1021/ac048199b

[9] S.K. Lee, I. Okura, Porphyrin-doped sol-gel glass as probe for oxygen sensing, Anal. Chim. Acta 342 (1997) 181-188.

DOI: 10.1016/s0003-2670(96)00562-4

[10] T.S. Yeh, C.S. Chu, Y.L. Lo, Highly sensitive optical fiber oxygen sensor using Pt(II) complex embedded in sol–gel matrices, Sens. Actuators B Chem. 119 (2006) 701-707.

DOI: 10.1016/j.snb.2006.01.051

[11] C.S. Chu, Y.L. Lo, High-performance fiber-optic oxygen sensors based on fluorinated xerogels doped with Pt(II) complexes, Sens. Actuators B Chem. 124 (2007) 376-382.

DOI: 10.1016/j.snb.2006.12.049

[12] C. McDonagh, B.D. MacCraith, A.K. McEcoy, Tailoring of sol-gel films for optical sensing of oxygen in gas and aqueous phase, Anal. Chem. 70 (1998) 45-50.

DOI: 10.1021/ac970461b

[13] B.F. Lei, B. Li, H.R. Zhang, S.Z. Lu, Z.H. Zheng, W.L. Li, Y. Wang, Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor, Adv. Funct. Mater. 613 (2006) 1883-1891.

DOI: 10.1002/adfm.200500737

[14] X.Y. Wang, C. Drew, S.H. Lee, K.J. Senecal, J. Kumar, L.A. Sarnuelson, Electrospun nanofibrous membranes for highly sensitive optical sensors, Nano Lett., 11 (2002) 1273-1275.

DOI: 10.1021/nl020216u

[15] T. Zhang, Q. Zhang, J. Ge, J. Goebl, M. Sun, Y. Yan, Y.S. Liu, C. Chang, J. Guo, Y. Yin, A self templated route to hollow silica microspheres, J. Phys. Chem. C 113 (2009) 3168-3175.

DOI: 10.1021/jp810360a

[16] Q. Zhang, T.R. Zhang, J.P. Ge, Y.D. Yin, Permeable silica shell through surface-protected etching, Nano Lett. 8 (2005) 2867-2871.

DOI: 10.1021/nl8016187

[17] B.H. Han, I. Manners, M.A. Winnik, Oxygen sensors based on mesoporous silica particles on layer-by-layer self-assembled films, Chem. Mater. 17 (2005) 3160-3171.

DOI: 10.1021/cm047770k

[18] J.R. Lakowicz, Principles of Fluorescence Spectroscopy, 2nd ed; Kluwer Academic/Plenum Press, New York, 1999, Chapter 8 and 9.

[19] W. Stöber, A. Fink, E. Bohn, Controlled growth of monodisperse silica spheres in micron size range, J. Colloid Interface Sci. 26 (1968) 62-69.

DOI: 10.1016/0021-9797(68)90272-5

[20] C.S. Chu, Y. L. Lo, Highly Sensitive and Linear Optical Fiber Carbon Dioxide Sensor Based on Sol-Gel Matrix Doped with Silica Particles and HPTS, Sens. Actuators B Chem. 143 (2009) 205-210.

DOI: 10.1016/j.snb.2009.09.019