Sodium yttrium fluoride based upconversion nano phosphors for biosensing

Nampi, Padmaja Parameswaran; Varma, Harikrishna; Biju, P.R.; Kakkar, Tarun; Jose, Gin; Saha, Sikha; Millner, Paul A.

doi:10.1088/1742-6596/619/1/012043

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With further research, many advantages of UC nanomaterials have been presented, such as low autofluorescence background, the absence of blinking and photobleaching, superior photostability, tunable and sharp-band emission, long lifetimes, large anti-Stokes shifts and so on. [5][6][7][8][9][10] As a result, it was studied by many researchers. Among the multitude of reported host materials, especially the fluoride nanoparticles get much attention mainly for their low lattice phonon energy which can reduce thermal lensing effects under strong pumping conditions to reduce non-radiative losses and therefore enhance luminescence efficiency.…”

Section: Introductionmentioning

confidence: 99%

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Yang

Gredin²,

Mortier

2019

Optical Materials

View full text Add to dashboard Cite

Through extremely facile RT(room temperature) co-precipitation method in mixed deionized water and ethanol solution, cubic KYF 4 :10%Yb/5%Er up-conversion nanoparticles with excellent emission intensity and desirable fluorescence lifetime after annealing under 974 nm pulsed laser excitation have been successfully synthesized. The X-ray powder diffraction pattern has been refined by profile fit in order to obtain accurate lattice parameters. The mean crystallite size and microstrain have been calculated by Williamson-Hall method. Joint effect of crystallite size and microstrain on photoluminescence properties have been studied based on the obtained samples. Green-to-red ratios of the emission spectra and slopes of the emission intensity versus excitation laser power have been investigated. The fluorescence lifetimes of the present samples have also been reported. The extraordinarily facile synthesis route, in environment-friendly solvents, provides a novel proposal to remove some of the obstacles that hinder the up-conversion nanoparticles development.

show abstract

Section: Introductionmentioning

confidence: 99%

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Yang

Gredin²,

Mortier

2019

Optical Materials

View full text Add to dashboard Cite

show abstract

“…Due to the unique properties of Ln 3+ such as long excited-state lifetimes, narrowing emission and absorption bands, large Stokes shifts, and rich 4f electronic energy level structures, they were widely used in many light-management applications. In addition, most lanthanide ions doped in inorganic host materials of REPO 4 (RE = Y, La, Gd, Lu) have very high thermal and chemical stability [ 17 , 18 , 19 , 20 , 21 , 22 ] which is important in biosensing devices [ 23 , 24 , 25 ]. Among inorganic hosts, lanthanide phosphate (LaPO 4 ) has a high index of refraction ( n = 1.85) and is widely investigated as a biological-sensing, drug-delivery, and light-emitting device [ 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

et al. 2023

View full text Add to dashboard Cite

Nanophosphors are widely used, especially in biological applications in the first and second biological windows. Currently, nanophosphors doped with lanthanide ions (Ln3+) are attracting much attention. However, doping the matrix with lanthanide ions is associated with a narrow luminescence bandwidth. This paper describes the structural and luminescence properties of co-doped LaPO4 nanophosphors, fabricated by the co-precipitation method. X-ray structural analysis, scanning electron microscope measurements with EDS analysis, and luminescence measurements (excitation 395 nm) of LaPO4:Eu3+/Nd3+ and LaPO4:Eu3+/Nd3+/Yb3+ nanophosphors were made and energy transfer between rare-earth ions was investigated. Tests performed confirmed the crystal structure of the produced phosphors and deposition of rare-earth ions in the structure of LaPO4 nanocrystals. In the range of the first biological window (650–950 nm), strong luminescence bands at the wavelengths of 687 nm and 698 nm (5D0 → 7F4:Eu3+) and 867 nm, 873 nm, 889 nm, 896 nm, and 907 nm (4F3/2 → 4I9/2:Nd3+) were observed. At 980 nm, 991 nm, 1033 nm (2F5/2 → 2F7/2:Yb3+) and 1048 nm, 1060 nm, 1073 nm, and 1080 nm (4F3/2 → 4I9/2:Nd3+), strong bands of luminescence were visible in the 950 nm–1100 nm range, demonstrating that energy transfer took place.

show abstract

“…A large number of research groups are looking for novel, nanosized, stable chemically and mechanically stable materials with attractive and distinct spectroscopic properties. − One of the materials that have brought an immense interest is YVO 4 . The interest is rightful due to the fact that doping with rare-earth ions like Eu 3+ or Nd 3+ , and/or additionally codoped with s 2 -type cations like Bi 3+ , has a number of potential applications, such as sensors, fluorescent labels, display devices, laser materials, − and bioprobes. , However, it is known for long that doping with Tb 3+ does not generate any luminescence in YVO 4.…”

Section: Introductionmentioning

confidence: 99%

Emission Quenching and First Evidence of Tb³⁺-to-As⁵⁺ Charge Transfer in Terbium(III) Ion-Doped YV_xAs_1–xO₄ Solid-State Solution

et al. 2020

View full text Add to dashboard Cite

The paper discusses the origin of emission quenching and the formation of metal-to-metal charge-transfer states in yttrium orthovanadate-arsenates doped with Tb3+ ions. For that purpose, a series of highly crystalline yttrium orthovanadate-arsenate nanoparticles (type YV x As1–x O4, where x = 2–65 mol %) doped with Tb3+ ions were prepared using the co-precipitation method. The structural and morphological properties of the particles were studied by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) techniques. The photoluminescence spectral and dynamical properties of YV x As1–x O4 doped with 1 mol % Tb3+ ions were investigated in detail. It was found that the emission quenching is related to changes in the band gap and Tb3+-to-V5+ metal-to-metal charge transfer. Further, the Tb3+-to-As5+ metal-to-metal charge transfer was identified and rationalized based on different models.

show abstract

Sodium yttrium fluoride based upconversion nano phosphors for biosensing

Cited by 3 publications

References 10 publications

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

Emission Quenching and First Evidence of Tb³⁺-to-As⁵⁺ Charge Transfer in Terbium(III) Ion-Doped YV_xAs_1–xO₄ Solid-State Solution

Contact Info

Product

Resources

About

Sodium yttrium fluoride based upconversion nano phosphors for biosensing

Cited by 3 publications

References 10 publications

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Extremely straightforward room temperature co-precipitation method to synthesize cubic KYF4:Yb/Er up-conversion nanoparticles in deionized water-ethanol solution

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

Emission Quenching and First Evidence of Tb3+-to-As5+ Charge Transfer in Terbium(III) Ion-Doped YVxAs1–xO4 Solid-State Solution

Contact Info

Product

Resources

About

Emission Quenching and First Evidence of Tb³⁺-to-As⁵⁺ Charge Transfer in Terbium(III) Ion-Doped YV_xAs_1–xO₄ Solid-State Solution