High-performance fiber-optic oxygen sensors based on fluorinated xerogels doped with Pt(II) complexes

Chu, Chen Shane; Lo, Yu Lung

doi:10.1016/j.snb.2006.12.049

Cited by 98 publications

(72 citation statements)

References 27 publications

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“…The PTCDI-C5 molecule has two absorption maxima like in the Soret (B) and Q bands in the literature. [52,61,64,66] The so-called Q-band is comparatively low and occurs in the visible (V) region and at lower photon energies. [84] In the visible region (from 1.59 to 3.26 eV), there are five Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Gündüz

2015

Polym. Adv. Technol.

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Investigation of the spectral, optical and surface morphology properties of the N,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications † Bayram Gündüz* The spectral and optical properties of the solutions of the N,N′-Dipentyl-3,4,9,10-perylenedicarboximide (PTCDI-C5) small molecule for different molarities were investigated in detail. The significant spectral parameters such as molar/mass extinction coefficients, absorption coefficient, electric dipole line strength, and oscillator strength of the PTCDI-C5 molecule were calculated. The absorption bands of PTCDI-C5 show vibronic structures with seven peaks at 2.08, 2.35, 2.53, 2.70, 2.86, 3.32, and 3.86 eV, respectively. The electronic spectra of the PTCDI-C5 can be characterized by two basic regions as visible and Soret band. Effects of the molarities on the significant many optical parameters were investigated in detail. The direct and indirect allowed optical band gaps of the PTCDI-C5 decrease with increasing molarity. Then, surface morphology properties were investigated and calculated roughness parameters of the PTCDI-C5 film. Finally, we discussed for optoelectronic applications of these parameters, and this study was compared with the similar and related studies in the literature.

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Section: Resultsmentioning

confidence: 99%

Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Gündüz

2015

Polym. Adv. Technol.

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“…In addition, it was shown that O 2 sensor films based on these fluorinated matrices exhibit a smaller error in O 2 reading due to photobleaching than sensor films based on non-fluorinated sol-gel precursors [75]. Fluorinated sol-gel-based materials have been also combined with longer lifetime platinum tetrakis pentrafluoropheny porphine (PtTFPP), platinum octaethylporphine (PtOEP), [meso-tetrakis(pentafluorophenyl) porphyinato] platinum(II) (PtF20TPP), Pt(II) meso-tetra(N-methyl-4-pyridyl)porphyrin tetrachloride phosphorescent complexes resulting in even more sensitive O 2 sensors [76][77][78]. Chu et al also described a fibrebased O 2 sensor with enhanced sensitivity.…”

Section: Luminescence-based O 2 Sensorsmentioning

confidence: 99%

Micro- and nanostructured sol-gel-based materials for optical chemical sensing (2005–2015)

2016

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This review (with 172 references) highlights the progress made in the past 10 years in silica sol-gel-based materials for use in optical chemical sensing. Following an introduction, the processes leading to the sol-gel-based and ormosil materials, their printability and methods for characterisation are discussed. Then various classes of optical sensors, with a focus on sensors for pH values, oxygen, carbon dioxide, ammonia (also in dissolved form), and heavy metal ions are described. A further section covers nanoparticle-based optical sensors mainly for use in intracellular sensing of the above species. Recent developments in this area are also emphasised and future trends discussed.

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“…A change in temperature results in a change in uorescence of the [Ir(piq) 2 (acac)] complex. The diffusion coefficient of the sol-gel matrix is also temperature dependent, 44 with higher temperatures resulting in faster diffusion, leading to an increase in collisional quenching. The results in Fig.…”

Section: Optimization Of Conditionsmentioning

confidence: 99%

An integrated micro-volume fiber-optic sensor for oxygen determination in exhaled breath based on iridium(iii) complexes immobilized in fluorinated xerogels

Xiong

et al. 2013

Analyst

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A novel integrated fiber-optic sensor with micro detection volume is developed and evaluated for O 2 determination on a breath-by-breath basis in human health monitoring applications. The sensing element was fabricated by dip-coating an uncladded optical fiber with [Ir(piq) 2 (acac)]-doped hybrid fluorinated ORMOSIL (organically modified silicate) film, which was prepared from 3,3,3-trifluoropropyltrimethoxysilane (TFP-TriMOS) and n-propyltrimethoxysilane (n-propyl-TriMOS). The sensor was then constructed by inserting the prepared optical fiber into a transparent capillary. A microchannel formed between the optical fiber and the capillary inner wall acted as a flow cell for the sample flowing through. The evanescent wave (EW) field produced on the fiber core surface can excite the O 2 -sensitive fluorophores of [Ir(piq) 2 (acac)] to produce emission fluorescence. O 2 can be sensed by its quenching effect on the emission fluorescence intensity. Spectroscopic properties have been characterized by FTIR and fluorescence measurements. Stern-Volmer and Demas models were both employed to analyse the sensor sensitivity, which is 13.0 with the LOD ¼ 0.009% (3s) and the response time is about 1 s. By integrating the sensing and detection elements on the optical fiber, the novel configuration showed advantages of easy fabrication and low cost. Parameters of sensitivity, response time, repeatability, humidity effect and temperature effect were discussed in detail. The proposed sensor showed potential for practical in-breath O 2 analysis application due to its advantages of easy fabrication, low cost, fast response, excellent hydrophobicity, negligible temperature interference and suitable sensitivity.

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High-performance fiber-optic oxygen sensors based on fluorinated xerogels doped with Pt(II) complexes

Cited by 98 publications

References 27 publications

Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Investigation of the spectral, optical and surface morphology properties of theN,N′-Dipentyl-3,4,9,10-perylenedicarboximide small molecule for optoelectronic applications

Micro- and nanostructured sol-gel-based materials for optical chemical sensing (2005–2015)

An integrated micro-volume fiber-optic sensor for oxygen determination in exhaled breath based on iridium(iii) complexes immobilized in fluorinated xerogels

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