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Phromsiri N, Abiodun SL, Manipuntee C, Leeladee P, Greytak AB, Insin N. Fluorescent responses of CdSe and Si QDs toward Copper (II) ion and the mixed-QDs probe for Cu2+ ion sensing. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Molaei M, Farahmandzadeh F, Hemmati R. Mercury (Hg 2+) Detection in Aqueous Media, Photocatalyst, and Antibacterial Applications of CdTe/ZnS Quantum Dots. J Fluoresc 2022; 32:2129-2137. [PMID: 35947332 DOI: 10.1007/s10895-022-03013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 08/04/2022] [Indexed: 11/29/2022]
Abstract
In the present work, CdTe/ZnS high luminescence quantum dots (QDs) were synthesized by a facile, fast, one-pot, and room temperature photochemical method. Synthesized QDs were characterized by different structural and optical analyses such as X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform-infrared spectroscopy (FT-IR), Raman, photoluminescence (PL) and UV-visible (UV-vis) spectroscopies. The results confirmed the successful growth of the ZnS shell and formation of CdTe/ZnS core/shell structure. CdTe/ZnS prepared QDs indicated a PL quantum yield of about 51%. These high luminescence QDs were used for detection of Hg2+ ions in aqueous media, as catalyst for photodegradation of different organic dyes, and as antibacterial material for the inhibition of bacterial growth. PL intensity of the CdTe/ZnS QDs was completely quenched after addition of 1 m molar Hg2+in to the media. Photocatalyst activity of CdTe/ZnS QDs was studied by rhodamine b, methylene blue, and methylene orange as organic dyes under both the sun and UV illuminations, and results showed that CdTe/ZnS QDs had the best photocatalyst activity for methylene blue degradation under UV irradiation and radical scavenger results indicated that electrons have a main role in photodegradation of methylene blue dye by CdTe/ZnS QDs under UV illumination. Antibacterial effects of CdTe/ZnS QDs evaluated by Minimum Inhibitory Concentration (MIC), and Minimum Bactericidal Concentration (MBC) methods against two strains of bacteria. The results of the antibacterial test showed that CdTe/ZnS could inhibit bacterial growth in Bacillus cereus (Gram-positive) and Escherichia coli (Gram-negative G) bacteria.
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Affiliation(s)
- Mehdi Molaei
- Department of Physics, Faculty of Science, Vali-E-Asr University, Rafsanjan, Iran.
| | | | - Rohullah Hemmati
- Department of Biology, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran
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Biranje A, Azmi N, Tiwari A, Chaskar A. Quantum Dots Based Fluorescent Probe for the Selective Detection of Heavy Metal Ions. J Fluoresc 2021; 31:1241-1250. [PMID: 34181146 DOI: 10.1007/s10895-021-02755-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 05/20/2021] [Indexed: 11/27/2022]
Abstract
Heavy metal ions are one of the primary causes of environmental pollution. A marshal effect of heavy metal ions is a paramount ultimatum to humans, aquatic animals and other organisms present in nature. Multitude arrays of materials have been proclaimed for sensing of heavy metal ions and also many methodologies are applied for heavy metal ion sensing. Due to their toxicity and non-biodegradability, it is required to be perceived immediately prior to its manifestation of harmful effects. Quantum Dots (QDs) are zero-dimensional nanomaterial particles and owing to their distinctive optical and electronic properties, they are utilized as nanosensors. QDs have enriched fluorescence properties which includes broad excitation spectrum, narrow emission spectrum and photostability. QDs offer eclectic and sensitive detection of heavy metal ions due to presence of discrete capping agents and different functional groups present on the surface of the QDs. These capping layers and functional groups attune the sensing capability of the QDs, which leverages the interactions of QDs with various analytes by different mechanisms. This review, comprising of papers from 2011 to 2020,focuses on heavy metal ions sensing potential of various quantum dots and its applicability as a nanosensor for on field heavy metal ions detection in water. Quantum Dots (QDs) based Heavy Metal Detection.
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Affiliation(s)
- Akshaya Biranje
- National Centre for Nanoscience and Nanotechnology, University of Mumbai, Vidyanagari, Kalina, Santacruz (East), Mumbai, 400098, India
| | - Namrah Azmi
- National Centre for Nanoscience and Nanotechnology, University of Mumbai, Vidyanagari, Kalina, Santacruz (East), Mumbai, 400098, India
| | - Abhishekh Tiwari
- National Centre for Nanoscience and Nanotechnology, University of Mumbai, Vidyanagari, Kalina, Santacruz (East), Mumbai, 400098, India.
| | - Atul Chaskar
- National Centre for Nanoscience and Nanotechnology, University of Mumbai, Vidyanagari, Kalina, Santacruz (East), Mumbai, 400098, India.
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Parani S, Oluwafemi OS. Selective and sensitive fluorescent nanoprobe based on AgInS 2-ZnS quantum dots for the rapid detection of Cr (III) ions in the midst of interfering ions. NANOTECHNOLOGY 2020; 31:395501. [PMID: 32531766 DOI: 10.1088/1361-6528/ab9c58] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We herein report a novel eco-friendly method for the fluorescent sensing of Cr (III) ions using green synthesized glutathione (GSH) capped water soluble AgInS2-ZnS (AIS-ZnS) quantum dots (QDs). The as-synthesized AIS-ZnS QDs were speherical in shape with average diameter of ∼2.9 nm and exhibited bright yellow emission. The fluorimetric analyses showed that, compared to Cr (VI) ions and other 20 metal ions across the periodic table, AIS-ZnS QDs selectively detected Cr (III) ions via fluorescent quenching. In addition, AIS-ZnS QDs fluorescent nanoprobes exhibited selective detection of Cr (III) ions in the mixture of interfering divalent metal ions such as Cu (II), Pb (II), Hg (II), Ni (II). The mechanism of Cr (III) sensing investigated using HRTEM and FTIR revealed that the binding of Cr (III) ions with the GSH capping group resulted in the aggregation of QDs followed by fluorescence quenching. The limit of detection of Cr (III) ions was calculated to be 0.51 nM. The present method uses cadmium free QDs and paves a greener way for selective determination of Cr (III) ions in the midst of other ions in aqueous solutions.
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Affiliation(s)
- Sundararajan Parani
- Department of Chemical Sciences (formerly Applied Chemistry), University of Johannesburg, P.O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa. Centre for Nanomaterials Science Research, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa
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Glutathione Modified Fluorescent CdS QDs Synthesized Using Environmentally Benign Pathway for Detection of Mercury Ions in Aqueous Phase. J Fluoresc 2020; 30:773-785. [PMID: 32418161 DOI: 10.1007/s10895-020-02545-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 04/23/2020] [Indexed: 12/11/2022]
Abstract
An adept, rapid and novel water-soluble glutathione functionalized CdS quantum dots (GSH@CdS QDs) were fabricated using green pathway for sensing of heavy metal contamination prevalent in industrial wastewater. GSH@CdS QDs were facilely synthesized in an aqueous phase reaction and were effectively characterized using FT-IR, XRD, FESEM, HRTEM and EDX techniques. The distinct fluorescence characteristics of GSH@CdS QDs were explored and the QDs showed selective sensitivity towards mercury ions with a low limit of detection of 0.54 nM under optimal conditions. The detailed interaction between GSH@CdS QDs and Hg2+ and the probable fluorescence quenching mechanism were established in this study. In comparison to already reported fluorescent probes, GSH@CdS QDs showed high sensitivity, biocompatibility, long fluorescence stability and convenient removal of mercury ions. Graphical Abstract Facile green route for the fabrication of glutathione capped CdS quantum dots for fluorescence-based detection of toxic Hg2+ ions.
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Tsolekile N, Nahle S, Zikalala N, Parani S, Sakho EHM, Joubert O, Matoetoe MC, Songca SP, Oluwafemi OS. Cytotoxicity, fluorescence tagging and gene-expression study of CuInS/ZnS QDS - meso (hydroxyphenyl) porphyrin conjugate against human monocytic leukemia cells. Sci Rep 2020; 10:4936. [PMID: 32188925 PMCID: PMC7080734 DOI: 10.1038/s41598-020-61881-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 03/03/2020] [Indexed: 12/11/2022] Open
Abstract
The toxicity of heavy metals present in binary semiconductor nanoparticles also known as quantum dots (QDs) has hindered their wide applications hence the advent of non-toxic ternary quantum dots. These new group of quantum dots have been shown to possess some therapeutic action against cancer cell lines but not significant enough to be referred to as an ideal therapeutic agent. In this report, we address this problem by conjugating red emitting CuInS/ZnS QDs to a 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin -photosensitizer for improved bioactivities. The glutathione capped CuInS/ZnS QDs were synthesized in an aqueous medium using a kitchen pressure cooker at different Cu: In ratios (1:4 and 1:8) and at varied temperatures (95 °C, 190 °C and 235 °C). Optical properties show that the as-synthesized CuInS/ZnS QDs become red-shifted compared to the core (CuInS) after passivation with emission in the red region while the cytotoxicity study revealed excellent cell viability against normal kidney fibroblasts (BHK21). The highly fluorescent, water-soluble QDs were conjugated to 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (mTHPP) via esterification reactions at room temperature. The resultant water-soluble conjugate was then used for the cytotoxicity, fluorescent imaging and gene expression study against human monocytic leukemia cells (THP-1). Our result showed that the conjugate possessed high cytotoxicity against THP-1 cells with enhanced localized cell uptake compared to the bare QDs. In addition, the gene expression study revealed that the conjugate induced inflammation compared to the QDs as NFKB gene was over-expressed upon cell inflammation while the singlet oxygen (1O2) study showed the conjugate possessed large amount of 1O2, three times than the bare porphyrin. Thus, the as-synthesized conjugate looks promising as a therapeutic agent for cancer therapy.
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Affiliation(s)
- Ncediwe Tsolekile
- Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa
- Department of Chemistry, Cape Peninsula University of Technology, P.O. Box 652, Cape Town, 2000, South Africa
| | - Sara Nahle
- Université De Lorraine, Faculté de Pharmacie, F-54001, Nancy Cedex, France
| | - Nkosingiphile Zikalala
- Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa
| | - Sundararajan Parani
- Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa
| | - El Hadji Mamour Sakho
- Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa
| | - Olivier Joubert
- Université De Lorraine, Faculté de Pharmacie, F-54001, Nancy Cedex, France
| | - Mangaka C Matoetoe
- Department of Chemistry, Cape Peninsula University of Technology, P.O. Box 652, Cape Town, 2000, South Africa
| | - Sandile P Songca
- Department of Chemistry, University of KwaZulu-Natal, Private Bag X 54001, Durban, 4000, South Africa
| | - Oluwatobi S Oluwafemi
- Department of Chemical Sciences, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, Johannesburg, South Africa.
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa.
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Pandey V, Tripathi VK, Singh KK, Bhatia T, Upadhyay NK, Goyal B, Pandey G, Hwang I, Tandon P. Nitrogen donor ligand for capping ZnS quantum dots: a quantum chemical and toxicological insight. RSC Adv 2019; 9:28510-28524. [PMID: 35529650 PMCID: PMC9071047 DOI: 10.1039/c9ra05651c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 08/28/2019] [Indexed: 01/12/2023] Open
Abstract
Nanoparticles having strong optical and electronic properties are the most widely used materials in sensor development.
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Affiliation(s)
- Vivek Pandey
- Department of Physics
- University of Lucknow
- Lucknow-226007
- India
| | - Vinay Kumar Tripathi
- Department of Animal Science and Biotechnology
- Chonbuk National University
- Jeonju
- Republic of Korea
| | | | - Tejasvi Bhatia
- Vivacious – Centre for Nanoscience and Education Research
- Lucknow-226020
- India
| | | | - Bela Goyal
- All India Institute of Medical Sciences
- Rishikesh-249201
- India
| | - Gajanan Pandey
- Department of Applied Chemistry
- Babasaheb Bhimrao Ambedkar University
- Lucknow-226025
- India
| | - Inho Hwang
- Department of Animal Science and Biotechnology
- Chonbuk National University
- Jeonju
- Republic of Korea
| | - Poonam Tandon
- Department of Physics
- University of Lucknow
- Lucknow-226007
- India
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