Controlling over the ligands of CdZnTe quantum dots to design a super simple ratiometric fluorescence nanosensor for silver ions detection†

The Analyst ◽  
2021 ◽  
Author(s):  
Haining Cui ◽  
Chengquan Wang ◽  
Suli Jia ◽  
Jing Qian ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silver Ions ◽  
Silver Ion ◽  
Ratiometric Fluorescence

A super simple ratiometric fluorescence nanosensor has been fabricated by controlling over the ligands of CdZnTe quantum dots (QDs) allowing sensitive and visual detecting silver ion (Ag+). The green-emitting L-cysteine...

Optical transformation of a CdTe quantum dot-based paper sensor for a visual fluorescence immunoassay induced by dissolved silver ions

2017 ◽  
Vol 5 (4) ◽  
pp. 826-833 ◽  
Author(s):  
Zhenzhen Lin ◽  
Shuzhen Lv ◽  
Kangyao Zhang ◽  
Dianping Tang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Cation Exchange ◽  
Carcinoembryonic Antigen ◽  
Silver Ions ◽  
Fluorescence Immunoassay ◽  
Cation Exchange Reaction ◽  
Optical Transformation ◽  
Cdte Quantum Dot ◽  
Paper Sensor

This work designs a visual fluorescence immunoassay for carcinoembryonic antigen based on structural and optical transformation of CdTe quantum dots immobilized on paper by cation-exchange reaction.

A ratiometric fluorescence sensor based on metal-organic frameworks and quantum dots for detection of ascorbic acid

2021 ◽  
Vol 121 ◽  
pp. 111622
Author(s):  
Li Chen ◽  
Limin Zheng ◽  
Fangqi Wang ◽  
Simin Yi ◽  
Donghao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Metal Organic Frameworks ◽  
Fluorescence Sensor ◽  
Ratiometric Fluorescence ◽  
Metal Organic

Immobilization of Silver Nanoparticles on Chitosan-Coated Silica-Gel-Beads and the Antibacterial Activity

2021 ◽  
Vol 892 ◽  
pp. 36-42
Author(s):  
Muhammad Iqbal Hidayat ◽  
Muhammad Adlim ◽  
Ilham Maulana ◽  
Muhammad Zulfajri
Keyword(s):  
Silver Nanoparticles ◽  
Silica Gel ◽  
Low Cost ◽  
Antibacterial Properties ◽  
Chitosan Film ◽  
Silver Ions ◽  
Filter Material ◽  
Silver Ion ◽  
Gel Beads ◽  
Metal Colloid

Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by silver metal colloid UV-Vis surface plasmon resonance at 400-700 nm. Ag0-[chi-SiG] showed the antibacterial properties of inhibiting the growth Staphylococcus aureus and Escherichia coli; then it provides the potential application for antibacterial filter material. According to the weight comparison between antibacterial standard and Ag content, then Ag0-[chi-SiG] has two and five times higher of exhibiting zone for each bacteria.

scholarly journals Transport and Separation of the Silver Ion with n–decanol Liquid Membranes Based on 10–undecylenic Acid, 10–undecen–1–ol and Magnetic Nanoparticles

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 936
Author(s):  
Gheorghe Nechifor ◽  
Florentina Mihaela Păncescu ◽  
Paul Constantin Albu ◽  
Alexandra Raluca Grosu ◽  
Ovidiu Oprea ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Membrane Separation ◽  
Silver Ions ◽  
Silver Ion ◽  
Bulk Liquid ◽  
Liquid Membranes ◽  
Gravimetric Analysis ◽  
Undecylenic Acid ◽  
Scanning Calorimetry ◽  
Source Phase

This paper presents a transport and recovery of silver ions through bulk liquid membranes based on n–decanol using as carriers 10–undecylenic acid and 10–undecylenyl alcohol. The transport of silver ions across membranes has been studied in the presence of two types of magnetic oxide nanoparticles obtained by the electrochemical method with iron electrodes in the electrolyte with and without silver ions, which act as promoters of turbulence in the membrane. Separation of silver ions by bulk liquid membranes using 10–undecylenic acid and 10–undecylenyl alcohol as carriers were performed by comparison with lead ions. The configuration of the separation module has been specially designed for the chosen separation process. Convective-generating magnetic nanoparticles were characterized in terms of the morphological and structural points of view: scanning electron microscopy (SEM), high-resolution SEM (HR–SEM), energy dispersive spectroscopy analysis (EDAX), Fourier Transform InfraRed (FTIR) spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimetry and magnetization. The process performance (flux and selectivity) was tested were tested for silver ion transport and separation through n–decanol liquid membranes with selected carriers. Under the conditions of the optimized experimental results (pH = 7 of the source phase, pH = 1 of the receiving phase, flow rate of 30 mL/min for the source phase and 9 mL/min for the receiving phase, 150 rot/min agitation of magnetic nanoparticles) separation efficiencies of silver ions of over 90% were obtained for the transport of undecenoic acid and about 80% for undecylenyl alcohol.

Paper-based visual detection of silver ions and l-cysteine with a dual-emissive nanosystem of carbon quantum dots and gold nanoclusters

2018 ◽  
Vol 10 (32) ◽  
pp. 3945-3950 ◽  
Author(s):  
Bingyan Han ◽  
Ying Li ◽  
Xixi Hu ◽  
Qin Yan ◽  
Jingmei Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visual Detection ◽  
Gold Nanoclusters ◽  
Silver Ions ◽  
Carbon Quantum Dots

The detection of silver ions and l-cysteine with a dual-emissive nanosystem of carbon quantum dots and gold nanoclusters.

Sign in / Sign up

Export Citation Format

Share Document