Enhanced upconversion luminescence and modulated paramagnetic performance in NaGdF4:Yb, Er by Mg2+ tridoping

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 81542-81551 ◽  
Author(s):  
Shuwen Zhao ◽  
Wei Liu ◽  
Xianya Xue ◽  
Yushi Yang ◽  
Zhiyong Zhao ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
New Strategy ◽  
First Time

In this work, a new strategy to enhance upconversion emission has been realized for the first time, based on β-NaGdF4:Yb3+, Er3+ nanocrystals (UCNC) using tridoping with magnesium (Mg2+) ions.

MOLTEN SALT SYNTHESIS OF YF3:Yb3+/Ln3+(Ln = Er3+, Tm3+) MICROSHEETS WITH MULTICOLOR UPCONVERSION LUMINESCENCE

2013 ◽  
Vol 06 (06) ◽  
pp. 1350061 ◽  
Author(s):  
MINGYE DING ◽  
CHUNHUA LU ◽  
LINHAI CAO ◽  
YARU NI ◽  
ZHONGZI XU
Keyword(s):  
Molten Salt ◽  
Laser Diode ◽  
Upconversion Luminescence ◽  
Emission Spectra ◽  
Upconversion Emission ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Orthorhombic System ◽  
Co Doping ◽  
First Time

In this paper, highly crystalline YF 3: Yb 3+/ Ln 3+( Ln = Er 3+, Tm 3+) microsheets were successfully synthesized by a surfactant-free molten salt method for the first time. The results indicated that the as-obtained samples belonged to orthorhombic system and exhibited microsheets morphology with side lengths of 30 to 80 μm and wall thickness from 1 to 1.5 μm. By changing the dopant's species ( Ln 3+), multicolor (yellow and blue) upconversion emission can be observed in YF 3: Yb 3+/ Ln 3+ microsheets under 980 nm laser diode (LD) excitation. The upconversion mechanisms in co-doping YF 3 samples were analyzed in detail based on the emission spectra. Importantly, this approach not only proposes a new alternative in synthesizing such materials, but also opens the possibility to meet the increasing commercial demand.

Enhanced upconversion luminescence of BiOCl:Yb3+,Er3+ nanosheets via carbon dot modification and their optical temperature sensing

2021 ◽  
Author(s):  
Taizhong Xiao ◽  
Yongjin Li ◽  
Tianhui Wang ◽  
Youzhun Fan ◽  
Fangyu He ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Temperature Sensing ◽  
Carbon Dot ◽  
Bismuth Oxychloride ◽  
New Strategy

A new strategy for enhancing upconversion emission via CD modification to improve photocarrier separation in bismuth oxychloride upconverting nanosheets.

scholarly journals Nano-Crystallization of Ln-Fluoride Crystals in Glass-Ceramics via Inducing of Yb3+ for Efficient Near-Infrared Upconversion Luminescence of Tm3+

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1033
Author(s):  
Jianfeng Li ◽  
Yi Long ◽  
Qichao Zhao ◽  
Shupei Zheng ◽  
Zaijin Fang ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Near Infrared ◽  
Upconversion Luminescence ◽  
Glass Ceramics ◽  
Upconversion Emission ◽  
Ceramic Composites ◽  
Wide Range ◽  
Transmission Window ◽  
Optical Applications ◽  
Upconversion Emissions

Transparent glass-ceramic composites embedded with Ln-fluoride nanocrystals are prepared in this work to enhance the upconversion luminescence of Tm3+. The crystalline phases, microstructures, and photoluminescence properties of samples are carefully investigated. KYb3F10 nanocrystals are proved to controllably precipitate in the glass-ceramics via the inducing of Yb3+ when the doping concentration varies from 0.5 to 1.5 mol%. Pure near-infrared upconversion emissions are observed and the emission intensities are enhanced in the glass-ceramics as compared to in the precursor glass due to the incorporation of Tm3+ into the KYb3F10 crystal structures via substitutions for Yb3+. Furthermore, KYb2F7 crystals are also nano-crystallized in the glass-ceramics when the Yb3+ concentration exceeds 2.0 mol%. The upconversion emission intensity of Tm3+ is further enhanced by seven times as Tm3+ enters the lattice sites of pure KYb2F7 nanocrystals. The designed glass ceramics provide efficient gain materials for optical applications in the biological transmission window. Moreover, the controllable nano-crystallization strategy induced by Yb3+ opens a new way for engineering a wide range of functional nanomaterials with effective incorporation of Ln3+ ions into fluoride crystal structures.

scholarly journals A Multi-User Interactive Coral Reef Optimization Algorithm for Considering Expert Knowledge in the Unequal Area Facility Layout Problem

2021 ◽  
Vol 11 (15) ◽  
pp. 6676
Author(s):  
Lorenzo Salas-Morera ◽  
Laura García-Hernández ◽  
Carlos Carmona-Muñoz
Keyword(s):  
Coral Reef ◽  
Collaborative Design ◽  
Expert Knowledge ◽  
Fitness Function ◽  
Facility Layout ◽  
Layout Problem ◽  
New Strategy ◽  
Problem Instances ◽  
Expert Designer ◽  
First Time

The problem of Unequal Area Facility Layout Planning (UA-FLP) has been addressed by a large number of approaches considering a set of quantitative criteria. Moreover, more recently, the personal qualitative preferences of an expert designer or decision-maker (DM) have been taken into account too. This article deals with capturing more than a single DM’s personal preferences to obtain a common and collaborative design including the whole set of preferences from all the DMs to obtain more complex, complete, and realistic solutions. To the best of our knowledge, this is the first time that the preferences of more than one expert designer have been considered in the UA-FLP. The new strategy has been implemented on a Coral Reef Optimization (CRO) algorithm using two techniques to acquire the DMs’ evaluations. The first one demands the simultaneous presence of all the DMs, while the second one does not. Both techniques have been tested over three well-known problem instances taken from the literature and the results show that it is possible to obtain sufficient designs capturing all the DMs’ personal preferences and maintaining low values of the quantitative fitness function.

Tuning the size and upconversion emission of NaYF4:Yb3+/Pr3+ nanoparticles through Yb3+ doping

RSC Advances ◽  
2014 ◽  
Vol 4 (99) ◽  
pp. 56302-56306 ◽  
Author(s):  
Shuwei Hao ◽  
Wei Shao ◽  
Hailong Qiu ◽  
Yunfei Shang ◽  
Rongwei Fan ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Simple Method

We introduce a simple method to tune the resulting size as well as the upconversion luminescence of NaYF4:Yb3+/Pr3+ nanoparticles through varying the sensitizer ytterbium concentration.

Enhanced red upconversion emission and its mechanism in Yb3+–Er3+ codoped α-NaLuF4 nanoparticles

2017 ◽  
Vol 41 (3) ◽  
pp. 1193-1201 ◽  
Author(s):  
Hao Lin ◽  
Dekang Xu ◽  
Anming Li ◽  
Zhiren Qiu ◽  
Shenghong Yang ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Initial Solution ◽  
Solution Ph

Red upconversion luminescence is greatly enhanced through manipulation of the initial solution pH.

Multi-functional NaErF4:Yb nanorods: enhanced red upconversion emission, in vitro cell, in vivo X-ray, and T2-weighted magnetic resonance imaging

Nanoscale ◽  
2014 ◽  
Vol 6 (5) ◽  
pp. 2855-2860 ◽  
Author(s):  
Haibo Wang ◽  
Wei Lu ◽  
Tianmei Zeng ◽  
Zhigao Yi ◽  
Ling Rao ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Upconversion Emission ◽  
Resonance Imaging ◽  
X Ray ◽  
Weighted Magnetic Resonance Imaging ◽  
New Type ◽  
First Time

A new type of multi-functional NaErF4 nanoprobe with enhanced red upconversion emission was developed and used for in vitro cell, in vivo X-ray and T2-weighted magnetic resonance imaging for the first time.

scholarly journals Detection of analytes in mitochondria without interference from other sites based on an innovative ratiometric fluorophore

2018 ◽  
Vol 9 (24) ◽  
pp. 5461-5466 ◽  
Author(s):  
Tian-Bing Ren ◽  
Qian-Ling Zhang ◽  
Dongdong Su ◽  
Xing-Xing Zhang ◽  
Lin Yuan ◽  
...  
Keyword(s):  
New Strategy ◽  
First Time

A new strategy that integrates the targeting group and response moiety together for the preparation of mitochondrial probe was developed. Bioimaging studies have shown that for the first time, the newly designed probe HDFL-Cys can first accumulate in mitochondria and then react with the analyte.

scholarly journals Synthesis and characterization of green tea (Camellia sinensis (L.) Kuntze) extract and its major components-based nanoflowers: a new strategy to enhance antimicrobial activity

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44303-44308 ◽  
Author(s):  
Ayşe Baldemir ◽  
N. Buse Köse ◽  
Nilay Ildız ◽  
Selen İlgün ◽  
Sadi Yusufbeyoğlu ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Agent ◽  
Green Tea ◽  
Camellia Sinensis ◽  
Synthesis And Characterization ◽  
New Strategy ◽  
Main Components ◽  
First Time

In this study, for the first time, a novel organic–inorganic nanobio-antimicrobial agent called “nanoflowers” (Nfs) from Camellia sinensis (L.) Kuntze extracts and its main components were produced and the increase in the antimicrobial activity of Nfs was elucidated.

scholarly journals Aligning policy and law? The creation of a domestic abuse offence incorporating coercive control

2018 ◽  
Vol 18 (1) ◽  
pp. 67-83 ◽  
Author(s):  
Michele Burman ◽  
Oona Brooks-Hay
Keyword(s):  
Criminal Justice ◽  
Domestic Abuse ◽  
Unintended Consequences ◽  
Access To Justice ◽  
Coercive Control ◽  
New Strategy ◽  
Scottish Government ◽  
Definition Of ◽  
First Time ◽  
Criminal Justice Response

Since 2000, the Scottish Government has adopted a gendered definition of domestic abuse which explicitly positions it as both a cause and a consequence of gender inequality. Following the launch of a new strategy to prevent and eradicate violence against women and girls, the Scottish Government announced proposals to create, for the first time, a bespoke offence of domestic abuse, designed to encompass the spectrum of abusive acts that constitute domestic abuse, including emotional and psychological abuse. The new offence is intended to better reflect the experience of victims subject to coercive control, improve the criminal justice response and facilitate access to justice. It represents one of the most radical attempts yet to align the criminal justice response with contemporary policy and feminist conceptual understanding of domestic abuse as a form of coercive control. Drawing on feminist scholarship which has interrogated the value of law reform, we critically assess the scope of the legislation, the likely challenges associated with its use in the Scottish context, and the potential for unintended consequences.

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