Fluorescence Line-Narrowing Study of Eu<sup>3+</sup>-Doped Sol−Gel Silica:  Effect of Modifying Cations on the Clustering of Eu<sup>3+</sup>

Costa, Vilma C.; Lochhead, and Michael J.; Bray, Kevin L.

doi:10.1021/cm9504910

Cited by 112 publications

(92 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main limitation of particle analyzer is that, it only measures the hydrodynamic radius of the particle and not the actual size of the particle Costa et al (1996). Therefore, data produced can be misleading and not absolute, it should be used in conjunction to other techniques.…”

Section: Particle Analyzer Analysis Of Tm-doped Alumina Nanoparticlesmentioning

confidence: 99%

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Rahmat¹,

Rashid²,

Wong³

et al. 2017

American Journal of Applied Sciences

View full text Add to dashboard Cite

It is reported that during the fabrication of doping RE ions into the silica preform, the distribution of particles is inhomogeneous and becomes uneven throughout the fiber which lead to unwanted spectroscopic characteristics. It is assumed that by using thulium doped with alumina, the problem with the inhomogeneity of the particles inside the fiber can be solved. With the incorporation of alumina particles with thulium ions, the clustering effect and the ion-ion interactions between the ions can be prevented. In this research, thulium doped alumina nanoparticles will be synthesized by using sol-gel method to achieve particles within the nanoscale range of less than 100 nm in size, evenly distributed nanoparticles and high uniformity. The characterization activities will be perform by using optical microscope, FESEM, EDS and particle analyzer to identify the properties of the resulting solutions. By doping thulium with alumina nanoparticles, it is assumed that the amplification in the transmission systems can be increased and the conversion of passive optical fibers to active fibers can be achieved.

show abstract

Section: Particle Analyzer Analysis Of Tm-doped Alumina Nanoparticlesmentioning

confidence: 99%

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Rahmat¹,

Rashid²,

Wong³

et al. 2017

American Journal of Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Fibres up to 1 m length were drawn 35 . These fibres were studied for pH sensing and as laser dye when appropriately doped by fluorescent molecules, viz., fluorescein and rhodamine-6G 36,37 The special network structure can be used in sound detection 40 . Porous silica films are also used as adsorbents, scaffolds for composite material synthesis, in separation technology 42 , and molecular and biological engineering 43 .…”

Section: Sol-gel Glasses Optical Fibres and Nanocomposite Materialsmentioning

confidence: 99%

“…Fibres up to 1 m length were drawn 35 . These fibres were studied for pH sensing and as laser dye when appropriately doped by fluorescent molecules, viz., fluorescein and rhodamine-6G 36,37 . Nanoparticles of semiconductors or metals have been widely investigated for applications in nonlinear optics 38 .…”

Section: Sol-gel Glasses Optical Fibres and Nanocomposite Materialsmentioning

confidence: 99%

Sol-gel Technology for Sensor Applications

Chaudhury

Gupta

Gulia

2007

DSJ

View full text Add to dashboard Cite

Sol-gel processes refer to the transition of predefined compositions of inorganic alkoxides precursors from liquid sol phase to solid gel phase. The phenomenon of sol-gel was known to mankind for more than 150 years. It is because of concerted efforts of researchers from multidisciplinary fields, sol-gel science transformed to technology. Several products are already commercially available for applications in optical coatings, nanocomposites, and public healthcare. Potential applications in the areas of biosensors and environmental monitoring are expected. Newer applications with nanotechnology appear too exciting. An attempt has been made to address important applications of sol-gel technology, particularly in sensing techniques from the defence perspective.Keywords: Sol-gel technology, nanomaterials, healthcare, sensors, defence applications Revised 19 November 2006 . INTRODUCTIONThe term sol-gel was first coined in the late 1800s. It generally refers to a low-temperature method using inorganic precursors that can produce ceramics and glasses with better purity and homogeneity than through high temperature conventional processes 1 . Two most attractive features of the sol-gel process are that it can produce compositions that cannot be created with conventional methods, and that the mixing level of the solution is retained in the final product, often up to the molecular scale.Sol-gel method has been successfully used to manufacture a variety of products, viz., bulk glasses 2 , optical fibers 3 , special coatings, ultra-pure powders, and multifunctional materials. Figure 1 shows different types of materials made from sol-gels. Sol-gelprocessed transparent porous matrix offers the possibility of doping various organic and inorganic molecules [5][6][7][8] . Sol-gel process has been used to Defence Science Journal, Vol. 57, No. 3, May 2007, pp. 241-253 © 2007 241 REVIEW PAPERfabricate materials which can be used as new laser materials, nanocomposites, biomimetic systems, and so on. Because of potential in fabrication of a wide variety of new materials, understanding of sol-gel processes has become the centre of interdisciplinery research, viz., physics, chemistry, biology, biotechnology, biochemistry, electronics, and related engineering branches. Sol-gel materials have a wide range of applications, from environmental monitoring, biosensors for healthcare, to nanotechnology for sensing clinically-important analytes. . BASICS OF SOL-GEL PROCESSThe sol-gel process is a versatile technique which involves the transition of a predefined composition from liquid sol (mostly colloidal) phase into a solid gel phase 9 . Sol-gel processing involves the hydrolysis of a metal alkoxide followed by condensation and polymerisation reactions, leading to the sol-gel state.242 DEF SCI J, VOL. 57, NO. 3, MAY 2007 These general reactions are shown below:Metal alkoxides are most popular because these react readily with water. The most widely used metal alkoxides are the alkoxysilanes, such as tetramethoxysilane (TMOS) a...

show abstract

“…Dopant clustering is deleterious because it leads to concentration quenching of luminescence through cross-relaxation and energy transfer processes. In previous work, it was shown a method for detecting rare earth clustering in sol-gel glasses based on Eu 3+ fluorescence line narrowing spectroscopy 9 . Fluorescence line narrowing (FLN) is a site-selective spectroscopy designed to combat inhomogeneous spectral broadening in glass.…”

Section: Introductionmentioning

confidence: 99%

“…Fluorescence line narrowing (FLN) is a site-selective spectroscopy designed to combat inhomogeneous spectral broadening in glass. It was reported that the addition of metal cations co-dopants leads to some inhibition of the tendency for Eu 3+ to aggregate in a gel-derived SiO 2 matrix 9 . Dopant ion encapsulation by complex-forming ligands has been achieved in order to inhibit clustering of the dopant ions 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Optical characterization of sol-gel glasses derived from Eu3+ complex-forming precursors

Costa¹,

Vasconcelos²,

Bray³

1998

Quím. Nova

Self Cite

View full text Add to dashboard Cite

Fluorescence Line-Narrowing Study of Eu³⁺-Doped Sol−Gel Silica: Effect of Modifying Cations on the Clustering of Eu³⁺

Cited by 112 publications

References 55 publications

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Sol-gel Technology for Sensor Applications

Optical characterization of sol-gel glasses derived from Eu3+ complex-forming precursors

Contact Info

Product

Resources

About

Fluorescence Line-Narrowing Study of Eu3+-Doped Sol−Gel Silica: Effect of Modifying Cations on the Clustering of Eu3+

Cited by 112 publications

References 55 publications

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Investigation of the Characteristics of Thulium Doped Alumina Nanoparticles for Applications in Silica-Based Fibers

Sol-gel Technology for Sensor Applications

Optical characterization of sol-gel glasses derived from Eu3+ complex-forming precursors

Contact Info

Product

Resources

About

Fluorescence Line-Narrowing Study of Eu³⁺-Doped Sol−Gel Silica: Effect of Modifying Cations on the Clustering of Eu³⁺