Highly stable branched cationic polymer-functionalized black phosphorus electrochemical sensor for fast and direct ultratrace detection of copper ion

2021 ◽  
Author(s):  
Yuan Li ◽  
Zhuanzhuan Shi ◽  
Chunmei Zhang ◽  
Xiaoshuai Wu ◽  
Liang Liu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Copper Ion ◽  
Cationic Polymer ◽  
Black Phosphorus ◽  
Ultratrace Detection

Incorporating a Novel Hexaazatriphenylene Derivative to a Flexible Screen-Printed Electrochemical Sensor for Copper Ion Detection in Water Samples

2020 ◽  
Vol 20 (21) ◽  
pp. 12582-12591
Author(s):  
Dinesh Maddipatla ◽  
Tahseen S. Saeed ◽  
Binu Baby Narakathu ◽  
Sherine O. Obare ◽  
Massood Z. Atashbar
Keyword(s):  
Electrochemical Sensor ◽  
Water Samples ◽  
Copper Ion ◽  
Ion Detection ◽  
Screen Printed

Sensitive electrochemical detection of copper ions based on the copper(ii) ion assisted etching of Au@Ag nanoparticles

The Analyst ◽  
2015 ◽  
Vol 140 (23) ◽  
pp. 8041-8047 ◽  
Author(s):  
Tianxiang Wu ◽  
Teng Xu ◽  
Zhanfang Ma
Keyword(s):  
Electrochemical Sensor ◽  
Electrochemical Detection ◽  
Ag Nanoparticles ◽  
Copper Ions ◽  
Copper Ion

A new sensitive electrochemical sensor for the detection of copper ions based on the copper ion assisted etching of Au@Ag nanoparticles was developed in this work.

scholarly journals Detection of Cu2+in Water Based on Histidine-Gold Labeled Multiwalled Carbon Nanotube Electrochemical Sensor

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Rilong Zhu ◽  
Gangqiang Zhou ◽  
Fengxia Tang ◽  
Chunyi Tong ◽  
Yeyao Wang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
River Water ◽  
Limit Of Detection ◽  
Copper Ions ◽  
Copper Ion ◽  
Enhancement Effect ◽  
Test Results ◽  
Multiwalled Carbon ◽  
Xiangjiang River ◽  
Daily Monitoring

Based on the strong interaction between histidine and copper ions and the signal enhancement effect of gold-labeling carbon nanotubes, an electrochemical sensor is established and used to measure copper ions in river water. In this study the results show that the concentrations of copper ion have well linear relationship with the peak current in the range of 10−11–10−7 mol/L, and the limit of detection is 10−12 mol/L. When using this method to detect copper ions in the Xiangjiang River, the test results are consistent with the atomic absorption method. This study shows that the sensor is convenient to be used in daily monitoring of copper ions in river water.

Biomimetic Extracellular Vesicles Embedded with Black Phosphorus for Molecular Recognition-Guided Biomineralization

2018 ◽  
Author(s):  
Yingqian Wang ◽  
Xiaoxia Hu ◽  
Lingling Zhang ◽  
Chunli Zhu ◽  
Jie Wang ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Extracellular Vesicles ◽  
Inorganic Phosphate ◽  
Physiological Activity ◽  
Medical Engineering ◽  
Matrix Vesicles ◽  
Black Phosphorus ◽  
Photothermal Effect ◽  
Biological Processes ◽  
Extracellular Environment

Extracellular vesicles (EVs) are involved in the regulation of cell physiological activity and the reconstruction of extracellular environment. Matrix vesicles (MVs) are a type of EVs, and they participate in the regulation of cell mineralization. Herein, bioinspired MVs embedded with black phosphorus are functionalized with cell-specific aptamer (denoted as Apt-bioinspired MVs) for stimulating biomineralization. The aptamer can direct bioinspired MVs to targeted cells, and the increasing concentration of inorganic phosphate originated from the black phosphorus can facilitate cell biomineralization. The photothermal effect of the Apt-bioinspired MVs also positively affects mineralization. In addition, the Apt-bioinspired MVs display outstanding bone regeneration performance. Considering the excellent behavior of the Apt-bioinspired MVs for promoting biomineralization, our strategy provides a way of designing bionic tools for studying the mechanisms of biological processes and advancing the development of medical engineering.<br>

Copper–oxygen Dynamics in Tyrosinase

2019 ◽  
Author(s):  
Nobutaka Fujieda ◽  
Sachiko Yanagisawa ◽  
Minoru Kubo ◽  
Genji Kurisu ◽  
Shinobu Itoh
Keyword(s):  
Catalytic Mechanism ◽  
Substrate Binding ◽  
Active Form ◽  
Copper Ion ◽  
Atomic Resolution ◽  
Oxygen Species ◽  
X Ray ◽  
Oxygen Dynamics ◽  
Insight Into ◽  
Copper Centre

To unveil the activation of dioxygen on the copper centre (Cu<sub>2</sub>O<sub>2</sub>core) of tyrosinase, we performed X-ray crystallograpy with active-form tyrosinase at near atomic resolution. This study provided a novel insight into the catalytic mechanism of the tyrosinase, including the rearrangement of copper-oxygen species as well as the intramolecular migration of copper ion induced by substrate-binding.<br>

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