A naked-eye pH-modulated ratiometric photoluminescence sensor based on dual-emission quantum dot@silica nanoparticles for Zn2+ and IO3−

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69251-69258 ◽  
Author(s):  
Yang Li ◽  
Qiang Ma ◽  
Guodong Li ◽  
Xingguang Su
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Dual Emission ◽  
Naked Eye

A sensitive and selective ratiometric photoluminescence (PL) sensor comprised of dual-emission quantum dots (QDs)@silica nanoparticles has been developed for the detection of Zn2+ and IO3−.

Fabrication of mono-dispersed silica-coated quantum dot-assembled magnetic nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32072-32077 ◽  
Author(s):  
San Kyeong ◽  
Cheolhwan Jeong ◽  
Han Young Kim ◽  
Do Won Hwang ◽  
Homan Kang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Fluorescent Properties

Quantum dots-embedded silica nanoparticles with an iron oxide NP core were prepared and exhibited super-paramagnetic and highly fluorescent properties.

A facile method to study the bioaccumulation kinetics of amorphous silica nanoparticles by quantum dot embedding

2018 ◽  
Vol 5 (12) ◽  
pp. 2830-2841
Author(s):  
Xiao-Mei Zang ◽  
Jia-Ming Li ◽  
Ying Wang ◽  
Yue-Yue Liu ◽  
Zhong-Bo Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Amorphous Silica ◽  
Kinetics Of

A facile method was developed to study the bioaccumulation kinetics of amorphous silica nanoparticles (AmSiNPs) by embedding the particles with quantum dots (QDs) and then using Cd as the tracer.

Boric acid functionalized ratiometric fluorescence probe for sensitive and on-site naked eye determination of dopamine based on two different kinds of quantum dots

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72715-72721 ◽  
Author(s):  
Yeqing Xu ◽  
Xiao Wei ◽  
Hongji Li ◽  
Xudong Zheng ◽  
Kai Lu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescence Probe ◽  
Carbon Quantum Dots ◽  
Eye Detection ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Naked Eye ◽  
Aminophenylboronic Acid ◽  
Naked Eye Detection

A simple dual-emission probe based on 3-aminophenylboronic acid functionalized CdTe quantum dots (QDs) and carbon quantum dots (CQDs) was developed for the on-site naked eye detection of dopamine (DA).

scholarly journals Encapsulation of Dual Emitting Giant Quantum Dots in Silica Nanoparticles for Optical Ratiometric Temperature Nanosensors

2020 ◽  
Vol 10 (8) ◽  
pp. 2767 ◽  
Author(s):  
Elisabetta Fanizza ◽  
Haiguang Zhao ◽  
Simona De Zio ◽  
Nicoletta Depalo ◽  
Federico Rosei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silica Nanoparticles ◽  
Near Infrared ◽  
Strong Dependence ◽  
Sio2 Nanoparticles ◽  
Silica Coating ◽  
Systematic Investigation ◽  
Dual Emission ◽  
Water Dispersible ◽  
Infrared Spectral

Accurate temperature measurements with a high spatial resolution for application in the biomedical fields demand novel nanosized thermometers with new advanced properties. Here, a water dispersible ratiometric temperature sensor is fabricated by encapsulating in silica nanoparticles, organic capped PbS@CdS@CdS “giant” quantum dots (GQDs), characterized by dual emission in the visible and near infrared spectral range, already assessed as efficient fluorescent nanothermometers. The chemical stability, easy surface functionalization, limited toxicity and transparency of the silica coating represent advantageous features for the realization of a nanoscale heterostructure suitable for temperature sensing. However, the strong dependence of the optical properties on the morphology of the final core–shell nanoparticle requires an accurate control of the encapsulation process. We carried out a systematic investigation of the synthetic conditions to achieve, by the microemulsion method, uniform and single core silica coated GQD (GQD@SiO2) nanoparticles and subsequently recorded temperature-dependent fluorescent spectra in the 281-313 K temperature range, suited for biological systems. The ratiometric response—the ratio between the two integrated PbS and CdS emission bands—is found to monotonically decrease with the temperature, showing a sensitivity comparable to bare GQDs, and thus confirming the effectiveness of the functionalization strategy and the potential of GQD@SiO2 in future biomedical applications.

Quantum Dots: Ultrasensitive, Biocompatible, Quantum-Dot-Embedded Silica Nanoparticles for Bioimaging (Adv. Funct. Mater. 9/2012)

2012 ◽  
Vol 22 (9) ◽  
pp. 1774-1774
Author(s):  
Bong-Hyun Jun ◽  
Do Won Hwang ◽  
Heung Su Jung ◽  
Jaeho Jang ◽  
Hyunsoo Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Silica Nanoparticles

Carbon-Dot and Quantum-Dot-Coated Dual-Emission Core–Satellite Silica Nanoparticles for Ratiometric Intracellular Cu2+ Imaging

2016 ◽  
Vol 88 (14) ◽  
pp. 7395-7403 ◽  
Author(s):  
Chenchen Zou ◽  
Mohamed Frahat Foda ◽  
Xuecai Tan ◽  
Kang Shao ◽  
Long Wu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Dual Emission ◽  
Carbon Dot ◽  
Emission Core

Photoluminescent carbon quantum dot grafted silica nanoparticles directly synthesized from rice husk biomass

2017 ◽  
Vol 5 (24) ◽  
pp. 4679-4689 ◽  
Author(s):  
Zhaofeng Wang ◽  
Jingjing Liu ◽  
Weilin Wang ◽  
Zichao Wei ◽  
Fan Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Rice Husk ◽  
Carbon Quantum Dots ◽  
Production Yield ◽  
Rice Husks ◽  
Carbon Quantum Dot ◽  
High Production

Carbon quantum dots grafted silica nanoparticles with high production yield and versatile photoluminescence are directly fabricated from rice husks.

NiAg-graphene quantum dot-graphene hybrid with high oxidase-like catalytic activity for sensitive colorimetric detection of malathion

2021 ◽  
Author(s):  
Xu Dan ◽  
Ruiyi Li ◽  
Qinsheng Wang ◽  
Yongqiang Yang ◽  
Haiyan Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Graphene Quantum Dot ◽  
Nickel Silver

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

scholarly journals Effect of Growth Temperature on the Characteristics of CsPbI3-Quantum Dots Doped Perovskite Film

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4439
Author(s):  
Shui-Yang Lien ◽  
Yu-Hao Chen ◽  
Wen-Ray Chen ◽  
Chuan-Hsi Liu ◽  
Chien-Jung Huang
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Quantum Dots ◽  
Quantum Dot ◽  
Growth Temperature ◽  
Electron Mobility ◽  
Surface Defects ◽  
Different Temperatures ◽  
Pb Doping ◽  
Pristine Film

In this study, adding CsPbI3 quantum dots to organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a doped perovskite film filmed by different temperatures was found to effectively reduce the formation of unsaturated metal Pb. Doping a small amount of CsPbI3 quantum dots could enhance thermal stability and improve surface defects. The electron mobility of the doped film was 2.5 times higher than the pristine film. This was a major breakthrough for inorganic quantum dot doped organic perovskite thin films.

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