Synthesis of l-glutathione-capped-ZnSe quantum dots for the sensitive and selective determination of copper ion in aqueous solutions

Ding, Yongling; Shen, Shirley; Sun, Huadong; Sun, Kangning; Liu, Futian

doi:10.1016/j.snb.2014.06.054

Cited by 118 publications

(55 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…During the accumulation step, Cd(II) ions were adsorbed on the surface of the GSH‐capped ZnSe/GC modified electrode through interaction with the carboxylic acid groups of the GSH capped ZnSe QDs and/or through competitive replacement of the Zn ions on the surface of the QDs by Cd ions, leading to the formation of less soluble particles of CdSe. Similar interaction mechanisms were reported earlier using GSH capped‐QDs as a fluorescence probe for metal ions detection .…”

Section: Resultsmentioning

confidence: 81%

“…Among these nanomaterials, semiconductor quantum dots (QDs) are of considerable interest due to their size‐dependent optical and physical properties, which offer significant advantages as optical probes for chemo/bio‐sensing. Most of the previous publications on QDs‐based nanohybrids for metal ions sensing have focused on the fluorescence properties of QDs, such as photoluminescense , electrochemiluminescense (ECL) and photoelectrochemical approaches based on quenching or enhancing of the fluorescence of QDs due to interaction with metal ions. However, this approach is limited by fluorescence sensitivity to the surrounding environments and non‐specific recognition of metal ions.…”

Section: Introductionmentioning

confidence: 72%

See 1 more Smart Citation

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

et al. 2018

Self Cite

View full text Add to dashboard Cite

This work describes for the first time the employment of water soluble GSH‐ZnSe QDs stabilized by XG and MWCNT for electrode modification in the detection of Cd ions in a highly sensitive and selective manner resulting from the unique structure and surface chemistry of the used QDs. The surface of a glassy carbon (GC) electrode was modified through casting a thin layer of multiwalled carbon nanotubes (MWCNT) followed by a complex layer of ZnSe quantum dots (QDs) stabilized by xanthan gum (XG). Due to the electrocatalytic properties of MWCNT and electroanalytical performance of ZnSe‐XG complex, the new modified electrode significantly improves the sensitivity and selectivity of Cd(II) detection and exhibits enhanced performance in comparison to bare GC, ZnSe/GC and ZnSe/MWCNT/GC electrodes. Strong interactions between ZnSe QDs and XG resulting from hydrogen bonding and complexing association led to stabilization of ZnSe QDs and higher affinity towards Cd(II) ions adsorption compared to a ZnSe QDs film alone. The modified electrode showed linear response in a wide concentration range from 100 nM to 5 μM (R2=0.9967) along with a high sensitivity of 156.6 nA ⋅ mol−1 ⋅ L−1 and a low detection limit of 20 nM. The electrode shows high selectivity to Cd with negligible interference from other metal ions and salts.

show abstract

Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 72%

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…[40] Cu(II) is micronutrient constituent and carries a significant responsibility in bone formation collectively with definite proteins and enzymes. [41,42] It has been commenced from different industries' wastewater such as mining, metallurgy, plating, steel works, chemical manufacturing, petroleum refining, and printing circuits and affects the nature environment. [43] The excess Cu(II) consumption will cause several diseases such as gastrointestinal symptoms and liver toxicity, Wilson's diseases, osteoporosis, and Alzheimer's diseases.…”

Section: Introductionmentioning

confidence: 99%

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu²⁺ Sensing”

Hussein

Rahman

Asiri

2017

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

The present work is aimed to synthesize a novel series of linear polyamides (PAs) 4 a-d based on di (thiazolyl-thiophenylidene)cyclyhexanone as well as carries aliphatic and aromatic species in the polymer main backbones. The polymerization process was occurred by solution polycondensation technique by the interaction of the newly synthesized monomer 3 with adepoyl, sebacoyl, terphthaloyl, and isophthaloyldiacid chlorides. Before polymerization, the structure of monomer 3 was confirmed by elemental and spectral analyses. The structures of polymers were also investigated by elemental, spectral analysis, thermal analysis, and Field-Emission Scanning Electron Microscopy (FE-SEM) micrographs. Film draw temperatures for all the polymers were evaluated in the range 509.0-542.3°C. Here, the heavy metallic sensors are developed with the polyamide-fabricated glassy carbon electrode (GCE) by reliable current vs. voltage technique. A thin layer of PA onto GCE was fabricated with conducting coating agents (5% nafion) to fabricate a selective heavy metal ions, Cu 2þ sensor in short response time in phosphate buffer phase. The fabricated sensor was also exhibited higher sensitivity, lower detection limit, large dynamic concentration ranges, long-term stability, and improved electrochemical performances toward Cu 2þ sensor. The calibration plot is linear (r 2 : 0.9956) over the large Cu 2þ ion concentration ranges (1.0 nM to 10.0 mM). The sensitivity and detection limit is 3.4177 µA cm −2 µM −1 and 0.36 nM (signal-to-noise ratio of 3) respectively. This novel effort is initiated a well-organized way of efficient cationic sensor improvement with conductive polymers for heavy metallic pollutants in environmental and health-care fields in large scales. GRAPHICAL ABSTRACT

show abstract

“…Cu 2+ is crucial to human body and many other biology, together with certain protein and enzymes [1][2][3][4][5][6] as well as plays a significant role in the formation of bone and cellular and other physiological processes such as the synthesis of collagen, hemoglobin and elastin [7,8]. However, excessive Cu 2+ may exhibit high toxicity and result in the damage to central nervous system and disorders associated with neurodegenerative diseases (e.g., Alzheimer's disease, osteoporosis disease and Wilson disease) [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Near-infrared quantum dots based fluorescent assay of Cu2+ and in vitro cellular and in vivo imaging

Tao

Zeng

Wang

2016

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Synthesis of l-glutathione-capped-ZnSe quantum dots for the sensitive and selective determination of copper ion in aqueous solutions

Cited by 118 publications

References 46 publications

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu²⁺ Sensing”

Near-infrared quantum dots based fluorescent assay of Cu2+ and in vitro cellular and in vivo imaging

Contact Info

Product

Resources

About

Synthesis of l-glutathione-capped-ZnSe quantum dots for the sensitive and selective determination of copper ion in aqueous solutions

Cited by 118 publications

References 46 publications

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu2+ Sensing”

Near-infrared quantum dots based fluorescent assay of Cu2+ and in vitro cellular and in vivo imaging

Contact Info

Product

Resources

About

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu²⁺ Sensing”