ChemInform Abstract: Universal Approach to the Synthesis of Silver Sulfide in the Forms of Nanopowders, Quantum Dots, Core-Shell Nanoparticles, and Heteronanostructures

ChemInform ◽  
2016 ◽  
Vol 47 (51) ◽  
Author(s):  
Stanislav I. Sadovnikov ◽  
Aleksandr I. Gusev
Keyword(s):  
Quantum Dots ◽  
Silver Sulfide ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Universal Approach ◽  
Core Shell Nanoparticles

Multifunctional gadolinium-labeled silica-coated core/shell quantum dots for magnetic resonance and fluorescence imaging of cancer cells

RSC Advances ◽  
2014 ◽  
Vol 4 (40) ◽  
pp. 20641-20648 ◽  
Author(s):  
Babao Lin ◽  
Xiuzhong Yao ◽  
Yihua Zhu ◽  
Jianhua Shen ◽  
Xiaoling Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Resonance ◽  
Cancer Cells ◽  
Fluorescence Imaging ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
High Relaxivity ◽  
Core Shell Nanoparticles

Multifunctional gadolinium-labeled silica-coated core/shell nanoparticles with high relaxivity and photoluminescence were synthesized for dual-modal contrast.

Photochromic Core-Shell Nanoparticles

2021 ◽  
Vol 01 ◽  
Author(s):  
V.A. Barachevsky
Keyword(s):  
Quantum Dots ◽  
Noble Metals ◽  
Kinetic Studies ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Preparation Methods ◽  
Hybrid Compounds ◽  
The Core ◽  
Core Shell Nanoparticles ◽  
Nanoparticles Of Noble Metals

: The results of own spectral-kinetic studies in the field of nanophotochromism of the core‒shell type hybrid compounds are integrated. The properties of photochromic nanoparticles of this type based on photochromic spirocompounds (spiropyrans and spirooxazines), chromenes, and diarylethenes and nanoparticles of noble metals (Ag and Au), diamonds, graphene and its oxide, silica, fullerenes, and quantum dots are considered. Preparation methods of photochromic nanoparticles have been developed.

Fluorescent DNA Probes Based on Quantum Dots and Core/Shell Quantum Dots

2013 ◽  
Vol 372 ◽  
pp. 115-118
Author(s):  
Meng Meng Song ◽  
Wen Juan Guo ◽  
Zhao Dai ◽  
Kai Li Qiu ◽  
Jun Fu Wei
Keyword(s):  
Quantum Dots ◽  
Dna Probes ◽  
Dna Probe ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Probe Field ◽  
Fluorescent Intensity ◽  
Cdte Qds ◽  
Quenching Efficiency ◽  
Core Shell Nanoparticles

Fluorescent DNA probes based on the fluorescence resonance energy transfer (FRET) were presented in this paper when AuNPs were as the energy acceptors and CdTe quantum dots and CdTe/SiO2 core/shell nanoparticles were as the energy acceptors, respectively. The DNA probes were prepared when energy donors and acceptors were conjugated with two single-stranded complementary oligonucleotides and hybridized with each other and the fluorescent intensity of probes could be decreased. The quenching efficiency of DNA probe was about 67 % when CdTe QDs were as the energy donors, while that of DNA probe was about 75 % when CdTe/SiO2 fluorescent core/shell nanoparticles were as the energy acceptors, which indicated that CdTe/SiO2 core/shell nanoparticles were suitable donors compared with CdTe QDs in DNA probe field.

CdSe/CdS Core/Shell Quantum Dots Synthesized with Water Soluble Polymer for Potential Biosensor Applications

2014 ◽  
Vol 805 ◽  
pp. 83-88
Author(s):  
Fábio Pereira Ramanery ◽  
Alexandra Ancelmo Piscitelli Mansur ◽  
Herman Sander Mansur
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Advanced Materials ◽  
Poly Vinyl Alcohol ◽  
Core Shell ◽  
Essential Property ◽  
Shell Nanoparticles ◽  
Water Soluble Polymer ◽  
Vis Spectroscopy ◽  
Core Shell Nanoparticles

Quantum dots (QDs) are very promising advanced materials due to their nanoscale dimensions and properties of quantum confinement. Among the most promising applications of QDs, the use as biomaterials is highlighted, especially as optical biosensors and biomarkers. In this work CdSe-CdS core-shell nanoparticles were obtained through colloidal aqueous route at room temperature. The biocompatible polymer poly (vinyl alcohol) modified with carboxyl groups (PVA-COOH) was used as a stabilizing agent. The effect of growing CdS shell on the quantum properties and dimensions of CdSe nanoparticles (core-shell structure) was studied by UV-vis spectroscopy, photoluminescence (PL) and transmission electron microscopy (TEM). The results showed the influence of the growth of the CdS shell layers in the optical properties of quantum dots. Based on the results it can be stated that conjugated systems of CdS/CdSe-PVA-COOH were obtained and exhibited enhanced photoluminescent behavior, an essential property to use this system in biosensing devices.

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