A tri-n-octylphosphine-assisted successive ionic layer adsorption and reaction method to synthesize multilayered core–shell CdSe–ZnS quantum dots with extremely high quantum yield

2013 ◽  
Vol 49 (56) ◽  
pp. 6346 ◽  
Author(s):  
Jun-jie Hao ◽  
Juan Zhou ◽  
Chun-yang Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Core Shell ◽  
High Quantum Yield ◽  
Reaction Method ◽  
High Quantum ◽  
Layer Adsorption ◽  
Ionic Layer

scholarly journals High-quantum yield alloy-typed core/shell CdSeZnS/ZnS quantum dots for bio-applications

2022 ◽  
Vol 20 (1) ◽  
Author(s):  
Jaehi Kim ◽  
Do Won Hwang ◽  
Heung Su Jung ◽  
Kyu Wan Kim ◽  
Xuan-Hung Pham ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Modification ◽  
Quantum Yield ◽  
Core Shell ◽  
Fluorescence Signal ◽  
High Quantum Yield ◽  
Ion Scattering ◽  
Fluorescent Intensity ◽  
High Quantum ◽  
Medium Energy Ion Scattering

Abstract Background Quantum dots (QDs) have been used as fluorophores in various imaging fields owing to their strong fluorescent intensity, high quantum yield (QY), and narrow emission bandwidth. However, the application of QDs to bio-imaging is limited because the QY of QDs decreases substantially during the surface modification step for bio-application. Results In this study, we fabricated alloy-typed core/shell CdSeZnS/ZnS quantum dots (alloy QDs) that showed higher quantum yield and stability during the surface modification for hydrophilization compared with conventional CdSe/CdS/ZnS multilayer quantum dots (MQDs). The structure of the alloy QDs was confirmed using time-of-flight medium-energy ion scattering spectroscopy. The alloy QDs exhibited strong fluorescence and a high QY of 98.0%. After hydrophilic surface modification, the alloy QDs exhibited a QY of 84.7%, which is 1.5 times higher than that of MQDs. The QY was 77.8% after the alloy QDs were conjugated with folic acid (FA). Alloy QDs and MQDs, after conjugation with FA, were successfully used for targeting human KB cells. The alloy QDs exhibited a stronger fluorescence signal than MQD; these signals were retained in the popliteal lymph node area for 24 h. Conclusion The alloy QDs maintained a higher QY in hydrophilization for biological applications than MQDs. And also, alloy QDs showed the potential as nanoprobes for highly sensitive bioimaging analysis. Graphical Abstract

scholarly journals Si/SiO2 Core/Shell Luminescent Silicon Nanocrystals and Porous Silicon Powders With High Quantum Yield, Long Lifetime, and Good Stability

2019 ◽  
Vol 7 ◽  
Author(s):  
Bernard Gelloz ◽  
Firman Bagja Juangsa ◽  
Tomohiro Nozaki ◽  
Koji Asaka ◽  
Nobuyoshi Koshida ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Quantum Yield ◽  
Silicon Nanocrystals ◽  
Good Stability ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quantum ◽  
Long Lifetime

One-pot synthesis of ultrasmall β-NaGdF4 nanoparticles with enhanced upconversion luminescence

2019 ◽  
Vol 7 (29) ◽  
pp. 8898-8904 ◽  
Author(s):  
Chunyan Cheng ◽  
Yueshan Xu ◽  
Songtao Liu ◽  
Yuanyuan Liu ◽  
Xian Wang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Upconversion Luminescence ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quality ◽  
Shell Nanoparticles ◽  
One Pot ◽  
High Quantum ◽  
One Pot Synthesis ◽  
Core Shell Nanoparticles

High quality β-NaGdYF4:Yb/Er and high quantum yield β-NaGdF4:Yb/Er@β-NaYF4 core shell nanoparticles were synthesized.

Plasmon–exciton systems with high quantum yield using deterministic aluminium nanostructures with rotational symmetries

Nanoscale ◽  
2019 ◽  
Vol 11 (42) ◽  
pp. 20315-20323 ◽  
Author(s):  
Landobasa Y. M. Tobing ◽  
Muhammad Danang Birowosuto ◽  
Kah Ee Fong ◽  
Yuan Gao ◽  
Jinchao Tong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
High Quantum Yield ◽  
Purcell Factor ◽  
High Quantum ◽  
Single Antenna

We study the emission of quantum dots coupled with aluminium nanoantenna of C6 symmetry, and observe Purcell factor in the range of 68.01 < Fp < 118.25 corresponding to a modified quantum yield of >89% in the single antenna.

S doped silicon quantum dots with high quantum yield as a fluorescent sensor for determination of Fe3+ in water

2020 ◽  
Vol 110 ◽  
pp. 110461
Author(s):  
Xiaoshuo Zhang ◽  
Chunhua Li ◽  
Sheliang Zhao ◽  
Huiyun Pang ◽  
Yong Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescent Sensor ◽  
High Quantum Yield ◽  
Silicon Quantum Dots ◽  
High Quantum ◽  
Doped Silicon

Spectroscopy of Colloidal Semiconductor Core/Shell Nanoplatelets with High Quantum Yield

Nano Letters ◽  
2013 ◽  
Vol 13 (7) ◽  
pp. 3321-3328 ◽  
Author(s):  
M. D. Tessier ◽  
B. Mahler ◽  
B. Nadal ◽  
H. Heuclin ◽  
S. Pedetti ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quantum ◽  
Colloidal Semiconductor
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