Comparison of upconversion luminescent properties and temperature sensing behaviors of β-NaYF4:Yb3+/Er3+ nano/microcrystals prepared by various synthetic methods

Xi, Junhua; Ding, Mingye; Dai, Jianbin; Pan, Yajing; Chen, Daqin; Ji, Zhenguo

doi:10.1007/s10854-016-4832-7

Cited by 14 publications

(14 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This anomalous temperature-dependent phenomenon was also found and reported by other groups for small sized upconversion nanocrystals. 59 The population distribution changes on 2 H 11/2 and 4 S 3/2 could be caused by surface defects and surface molecular quenchers (e.g. water molecular vibration) and temperature.…”

Section: Resultsmentioning

confidence: 99%

Emission stability and reversibility of upconversion nanocrystals

Liu

Wang

et al. 2016

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Emission stability and reversibility of upconversion nanocrystals

Liu

Wang

et al. 2016

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

“…Thus, size, shape, and crystalline phase are just a few characteristics of many that can significantly modify the performance of the nanothermometer. [61,62,63,64] Furthermore, in our previous publication on nanothermometry of Nd 3+ -doped GSAG (Gd3Sc2Al3O12) nanocrystals, we have shown that higher temperatures during solvothermal synthesis result in higher crystallinity of garnet nanocrystals of the same composition, and, consequently, higher relative thermal sensitivity. [28] Thus, substantially improved Sr values of YAG:Nd 3+ nanocrystals reported here suggest higher crystallinity achieved possibly due to higher synthesis temperature (400 °C) used compared to the previously reported protocol (350 °C).…”

Section: Discussionmentioning

confidence: 90%

Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd³⁺-Doped YAG Nanocrystals

Cantarano

Yao

Matulionytė

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Neodymium-doped yttrium aluminum garnet (YAG:Nd 3+ ) has been widely developed during roughly the last sixty years and has been an outstanding fluorescent material.It has been considered as the gold standard among multipurpose solid-state lasers. Yet, the successful downsizing of this system into the nano regimen has been elusive, so far. Indeed, the synthesis of a garnet structure at the nanoscale, with enough crystalline quality for optical applications was found to be quite challenging. Here, we present an improved solvothermal synthesis method producing YAG:Nd 3+ nanocrystals of remarkably good structural quality.Adequate surface functionalization using asymmetric double-hydrophilic block copolymers, constituted of a metal-binding block and a neutral water soluble block, provides stabilized YAG:Nd 3+ nanocrystals with a long term colloidal stability in aqueous suspensions. These newly stabilized nanoprobes keep the spectroscopic quality (long lifetimes, narrow emission lines, and large Stokes shift) characteristic of bulk YAG:Nd 3+ . The narrow emission lines of YAG:Nd 3+ nanocrystals are exploited by differential infrared fluorescence imaging, thus achieving an autofluorescence-free in vivo readout. In addition, nanothermometry measurements, based on the ratiometric fluorescence of the stabilized YAG:Nd 3+ nanocrystals, are demonstrated. The progress here reported paves the way for the implementation of this new stabilized YAG:Nd 3+ system in the preclinical arena.

show abstract

“…Till date, a lot of research work has been carried out to measure the sensitivity via luminescence thermometry using the thermally coupled levels of Er 3+ ions in different Er 3+ /Yb 3+ -coactivated upconverting materials which include glass materials, ceramics, phosphors, and different nanoparticles based on oxides, sulfides, and fluorides. 37,38 These different materials along with their sensitivity and range of temperature are summarized in Table 1. From this Table, it is clear that Er 3+ / Yb 3+ doping is efficient in a wide range of samples for the sensing application, and the fluoride-based materials exhibit competent thermalsensing behavior.…”

Section: Luminescence Thermometry and Temperature-sensing Properties Of Nayf 4 : Er 3+ /Yb 3+ Phosphorsmentioning

confidence: 99%

Synthesis and design of NaYF₄ microprisms via a microwave‐assisted approach for highly sensitive optical thermometry applications

Som

Yang

et al. 2021

J Am Ceram Soc

View full text Add to dashboard Cite

Hexagonal NaYF 4 : Er 3+ /Yb 3+ (β-NaYF 4 ) microprisms with uniform particle sizes were synthesized via a microwave-assisted hydrothermal method (MWHM). Nucleation and crystal growth were significantly surpassed owing to the microwave irradiation.Cubic-NaYF 4 : Er 3+ /Yb 3+ (α-NaYF 4 ) nanoparticles were transformed into β-NaYF 4 microprisms with reaction time in between 10 and 120 minutes at 180°C. The shape of the particles was enhanced via controlling the nucleation process with optimized irradiation duration and heating rates. The size distribution of β-NaYF 4 microprisms was further improved via regulating the concentration of chelating agents and pH values in the precursor solution. β-NaYF 4 microprisms displayed red and green color emissions for 980 nm excitation owing to the 4 F 9/2 and 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transitions of Er 3+ respectively. The ratio ( 2 H 11/2 / 4 S 3/2 → 4 I 15/2 ) between green fluorescence intensities (FIR) of β-NaYF 4 microprisms was recorded with the variation in temperature from 303 K to 550 K. The recorded FIR values obeyed Boltzmann distribution and the distribution was used to evaluate the sensitivity. The optimum absolute sensitivity was achieved as 0.0044 K −1 at 490 K with promising resolution, reversibility, and stability. Furthermore, the power-dependent variations in FIR values implied the suitability of β-NaYF 4 microprisms in measuring the laser-induced heating effects.

show abstract

Comparison of upconversion luminescent properties and temperature sensing behaviors of β-NaYF4:Yb3+/Er3+ nano/microcrystals prepared by various synthetic methods

Cited by 14 publications

References 37 publications

Emission stability and reversibility of upconversion nanocrystals

Emission stability and reversibility of upconversion nanocrystals

Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd³⁺-Doped YAG Nanocrystals

Synthesis and design of NaYF₄ microprisms via a microwave‐assisted approach for highly sensitive optical thermometry applications

Contact Info

Product

Resources

About

Comparison of upconversion luminescent properties and temperature sensing behaviors of β-NaYF4:Yb3+/Er3+ nano/microcrystals prepared by various synthetic methods

Cited by 14 publications

References 37 publications

Emission stability and reversibility of upconversion nanocrystals

Emission stability and reversibility of upconversion nanocrystals

Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd3+-Doped YAG Nanocrystals

Synthesis and design of NaYF4 microprisms via a microwave‐assisted approach for highly sensitive optical thermometry applications

Contact Info

Product

Resources

About

Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd³⁺-Doped YAG Nanocrystals

Synthesis and design of NaYF₄ microprisms via a microwave‐assisted approach for highly sensitive optical thermometry applications