Red and near infrared persistent luminescence nano-probes for bioimaging and targeting applications

Singh, Sunil Kumar

doi:10.1039/c4ra08847f

Cited by 156 publications

(87 citation statements)

References 154 publications

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“…[1][2][3][4] Chromium-doped gallates especially, have been studied intensively because of their near-infrared emission, situated in the first tissue transparency window (between 650 and 950 nm 5 ), and their long afterglow times. [6][7][8][9] Research on Cr-doped nanophosphors has shown that these materials have good chemical stability and low toxicity, necessary conditions for imaging applications.…”

mentioning

confidence: 99%

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor

Clercq

Poelman

2017

ECS J. Solid State Sci. Technol.

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The near-infrared emitting persistent phosphor LiGa 5 O 8 :Cr 3+ (LGO:Cr) has promising applications in bioimaging. In order to improve the persistent luminescence of LGO:Cr and other Cr-doped persistent phosphors, a better understanding of trapping and detrapping mechanisms is necessary. In this work, we study the afterglow and thermoluminescence via a thermal fading experiment. The results show that there is a broad trap distribution present in LGO:Cr. The emission spectrum of chromium changes during the afterglow, which indicates that different Cr ions experience a varying crystal field in the LGO host, due to different defect configurations, and that the detrapping process occurs locally. The results of thermoluminescence and spectral decay measurements show that chromium ions residing near deep traps are subject to a smaller crystal field. Vacancies formed during the synthesis are most probably causing this effect. Codoping LGO with Si 4+ or Ge 4+ significantly improves the persistent luminescence and increases the number of deep-lying traps in the phosphor.

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mentioning

confidence: 99%

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor

Clercq

Poelman

2017

ECS J. Solid State Sci. Technol.

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“…The utilization of persistent luminescent nanophosphors as bioimaging contrast agents provides three important advantages: it allows to obtain images without external excitation, eliminating the autofluorescence, and improving the signalto-noise ratio; emission from persistent luminescence materials are in the range 650-1000 nm which is within the biological optical window, increasing the detection depth; and persistent luminescent nanophosphors may be re-activated after a long period of inactivity using incoherent light sources [52,54,55].…”

Section: Persistent Luminescence Nanophosphorsmentioning

confidence: 99%

“…The synthetic methods used for the synthesis of persistent luminescent nanophosphors include co-precipitation, sol-gel, and solvothermal techniques followed by high-temperature post-annealing. Hightemperature synthesis techniques such as solid-state reaction and combustion synthesis have also been applied [52].…”

Section: +mentioning

confidence: 99%

“…The excitation energy in the trapping sites can be stored for long periods of time and the release can be stimulated either thermally or optically. After the release of electrons, the recombination of electrons and holes produces an emission in the NIR or Vis range of the electromagnetic spectrum [48][49][50][51][52][53].…”

Section: Persistent Luminescence Nanophosphorsmentioning

confidence: 99%

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Photoluminescent nanoplatforms in biomedical applications

Ibarra-Ruiz

Rodríguez

Capobianco

2016

Advances in Physics: X

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“…For a deeper and more detailed description of these matters, some excellent reviews can be found in the recent literature [19,[29][30][31][32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

et al. 2017

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Abstract:Rare earth based nanostructures constitute a type of functional materials widely used and studied in the recent literature. The purpose of this review is to provide a general and comprehensive overview of the current state of the art, with special focus on the commonly employed synthesis methods and functionalization strategies of rare earth based nanoparticles and on their different bioimaging and biosensing applications. The luminescent (including downconversion, upconversion and permanent luminescence) and magnetic properties of rare earth based nanoparticles, as well as their ability to absorb X-rays, will also be explained and connected with their luminescent, magnetic resonance and X-ray computed tomography bioimaging applications, respectively. This review is not only restricted to nanoparticles, and recent advances reported for in other nanostructures containing rare earths, such as metal organic frameworks and lanthanide complexes conjugated with biological structures, will also be commented on.

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Red and near infrared persistent luminescence nano-probes for bioimaging and targeting applications

Abstract: Schematic representation of the different processes in persistent luminescence: charging (1), stimulation (2), discharging (3) (PET-persistent energy transfer, QT-quantum tunneling).

Cited by 156 publications

References 154 publications

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor

Photoluminescent nanoplatforms in biomedical applications

Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

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Red and near infrared persistent luminescence nano-probes for bioimaging and targeting applications

Abstract: Schematic representation of the different processes in persistent luminescence: charging (1), stimulation (2), discharging (3) (PET-persistent energy transfer, QT-quantum tunneling).

Cited by 156 publications

References 154 publications

Local, Temperature-Dependent Trapping and Detrapping in the LiGa5O8:Cr Infrared Emitting Persistent Phosphor

Local, Temperature-Dependent Trapping and Detrapping in the LiGa5O8:Cr Infrared Emitting Persistent Phosphor

Photoluminescent nanoplatforms in biomedical applications

Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

Contact Info

Product

Resources

About

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor

Local, Temperature-Dependent Trapping and Detrapping in the LiGa₅O₈:Cr Infrared Emitting Persistent Phosphor