Electron Delocalization and Transfer Across Polyoxometalates‐Based Subnanomaterials in Catalytic Reactions DOI
Siyang Nie, Xun Wang

Small Methods, Journal Year: 2023, Volume and Issue: 8(8)

Published: Dec. 31, 2023

Due to their identical building blocks and high surface-to-volume ratio, subnanomaterials exhibit significant properties compared bulk nanomaterial counterparts. The interactions between these can result in either equal or unequal sharing of electrons, leading electron transfer heterojunctions delocalization within symmetric structures. Clusters, possessing electronic akin atoms, serve as reservoirs electrons stabilize crucial intermediates catalytic reactions. This perspective provides a novel understanding well-defined with distinct architectures, such cluster-based constructions co-assembled heterojunctions, emphasizing the relationship structures properties. objective is provide perspectives on realm architectures.

Language: Английский

The size-dependent thermal enhancement of down-shifting luminescence based on non-Yb3+-mediated energy migration DOI
Rui Chen, Jie Xu,

Ju Xu

et al.

Journal of Luminescence, Journal Year: 2024, Volume and Issue: 270, P. 120575 - 120575

Published: March 16, 2024

Language: Английский

Citations

4
High-Fluoride-Induced Rapid Synthesis and Universal Modulation of Hexagonal Phase Nayf4 for Temperature Sensing DOI
Song Wang, Yuee Chen, Zixiang Zhou

et al.

Published: Jan. 1, 2025

Hexagonal-phase NaYF4 (β-NaYF4) is extensively utilized in bioimaging and fluorescent labeling due to its excellent biocompatibility optimal up-conversion luminescence the visible light region. However, conventional hydrothermal methods for producing β-NaYF4 typically necessitate prolonged reaction times are prone impure phase mixtures, thus lacking efficiency meeting increasing demand. In our study, we have developed a rapid straightforward method synthesizing by controlling nucleation rate through adjusting concentration of F- solution, effectively managing transition process. The use high fluoride concentrations allows multiple molecules precursor rapidly reach critical state required transitioning from cubic hexagonal phase, resulting swift formation hexagonal-phase crystals. Furthermore, successfully synthesized NaGdF4, NaYbF4, NaErF4 using this method, demonstrating universality. Additionally, thorough investigation into properties Yb3+ Er3+ co-doped has been conducted. When encapsulated as polymer film, variations emitted color with temperature indicate potential applications sensing. efficient synthesis study addresses supply demand contradiction high-quality β-NaYF4, providing significant support subsequent research biological related fields.

Language: Английский

Citations

0
Energy Aggregation for Illuminating Upconversion Multicolor Emission Based on Ho3+ Ions DOI

Xiaoyu Meng,

Tao Shen, Wenbo Zhang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Lanthanide-doped upconversion luminescent nanoparticles (UCNPs) have garnered extensive attention due to their notable anti-Stokes shifts and superior photostability. Notably, Ho3+-based UCNPs present a complex energy level configuration, which poses challenges in augmenting luminescence efficiency. Herein, rational design strategy was used enhance the intensity of Ho3+ ions by improving photon absorption ability utilization Efficient transfer excitation light were achieved through carefully selected host materials, precisely controlled sensitizers, external antennas using organic dyes, enhancing luminescence. Due attenuation effect hydroxyl vibration on luminescence, nanomaterials exhibit multicolor characteristics different solution environments. Significantly, composites intense red aqueous solution, showing great application potential biomedicine colorimetry.

Language: Английский

Citations

0
High-fluoride-induced rapid synthesis and universal modulation of hexagonal phase NaYF4 DOI
Yan Liu, Yuee Chen, Song Wang

et al.

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116987 - 116987

Published: April 1, 2025

Language: Английский

Citations

0
Dynamic modulation of multicolor upconversion luminescence of Er3+ via excitation pulse width DOI Open Access
En Ma, Shiqi Yu, Wenwu You

et al.

The Journal of Chemical Physics, Journal Year: 2024, Volume and Issue: 160(20)

Published: May 28, 2024

Lanthanide-doped upconversion (UC) luminescent materials display multicolor emissions, making them ideal for a variety of applications, such as multi-channel biological imaging, fluorescence encryption, anti-counterfeiting, and 3D display. Manipulating the UC emissions with fixed composition is crucial their applications. Herein, we propose facile strategy to achieve pulse-width-dependent in NaYF4:Yb/Er/Tm nanocrystals. Upon excitation 980 nm continuous-wave laser diode, Er3+ ions NaYF4:20%Yb,15%Er,1%Tm nanocrystals exhibited red-to-green (R/G) ratio 11.3. Nevertheless, by employing pulse widths from 0.1 10 ms, R/G can be easily adjusted 0.9 11.3, resulting continuous remarkable color transformation green, yellow, orange, red. By virtue dynamic luminescence variation these nanocrystals, demonstrated potential applications areas anti-counterfeiting information encryption. These findings provide deep insights into excited-state dynamics energy transfer upon excitation, which may pave way designing toward versatile

Language: Английский

Citations

3
Codoping of Yttria (Y2O3): Ho–Yb Nanoparticles with Li Increase Emitted Green Light Intensity for Security Ink and Bioimaging DOI
Manas Srivastava, Santosh Kumar Sahu, Atom Rajiv Singh

et al.

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(22), P. 20887 - 20898

Published: Nov. 14, 2023

Rare earth-doped up-conversion materials have attracted considerable attention because of their various applications in solid-state lasers, color displays, bioimaging, and so forth. The emission most does not enough intensity. However, this intensity can be increased by doping sensitizers. Ho3+-doped compounds show green which applications. Here, we reported how the sensitizers Yb3+ Li+. In work, chosen Y2O3 as host, Ho3+ activator, sensitizer studied properties under 980 nm laser. metal citrate-gel decomposition method provides a homogeneous solid solution formation. Green light increases significantly increase concentration well codoping for Y2O3:10 at % Yb3+–2 Ho3+–5 Li+ system is 9 times more than that system. Also, carried out down-conversion phenomena excitation 448 nm. Luminescence visible range decreases with or due to energy transfer from Yb3+. Interestingly, luminescence peaks corresponding (1000 nm) (1200 NIR are also observed excitation. Peak 1000 related quantum cutting phenomenon. efficiency found 180% calculations. Its extensively shown different areas such security ink, consignment identification, bioimaging muscle bone through process.

Language: Английский

Citations

4
Electron Delocalization and Transfer Across Polyoxometalates‐Based Subnanomaterials in Catalytic Reactions DOI
Siyang Nie, Xun Wang

Small Methods, Journal Year: 2023, Volume and Issue: 8(8)

Published: Dec. 31, 2023

Due to their identical building blocks and high surface-to-volume ratio, subnanomaterials exhibit significant properties compared bulk nanomaterial counterparts. The interactions between these can result in either equal or unequal sharing of electrons, leading electron transfer heterojunctions delocalization within symmetric structures. Clusters, possessing electronic akin atoms, serve as reservoirs electrons stabilize crucial intermediates catalytic reactions. This perspective provides a novel understanding well-defined with distinct architectures, such cluster-based constructions co-assembled heterojunctions, emphasizing the relationship structures properties. objective is provide perspectives on realm architectures.

Language: Английский

Citations

3