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Aulakh MK, Dua J, Pal B. Influence of capping agents on morphology and photocatalytic response of ZnS nanostructures towards crystal violet degradation under UV and sunlight. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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2
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Chatterjee A, Mondal G, Guthikonda KK, Saha A. Aqueous synthesis of mercaptopropionic acid capped ZnSe QDs and investigation of photoluminescence properties with metal doping. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Inactivation of Staphylococcus aureus in visible light by morphology tuned α-NiMoO4. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.09.042] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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4
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Kundu S, Maiti S, Ghosh D, Roy CN, Saha A. Aqueous Synthesis of Protein-Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor-Induced Cu II Ion Sensing. Chemphyschem 2017; 18:2533-2540. [PMID: 28581632 DOI: 10.1002/cphc.201700361] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/22/2017] [Indexed: 02/03/2023]
Abstract
In view of their promising bio-applicability, we have synthesized water-soluble bovine serum albumin (BSA)-encapsulated ZnSe quantum dots (QDs) with visible emission with longer average luminescence lifetimes of approximately 125 ns at ambient conditions. BSA-ZnSe QDs are shown to be efficient selective copper ion probes in the presence of physiologically important metal ions through luminescence quenching with a high Stern-Volmer constant (3.3×105 m-1 ). The mechanism of sensing has been explained in terms of electron transfer processes and the apparent rate of electron transfer (Ket ) from ZnSe QDs to Cu2+ has been calculated to be 2.8×108 s-1 . It is demonstrated that the negative conduction band potential plays a major role in the feasibility of the electron transfer process, which is reflected in the higher efficacy of ZnSe QDs in sensing copper(II) ions over other group II-VI quantum dots, namely, CdSe, ZnS, or CdS. The results observed with cysteine-capped QDs are almost identical to those with BSA-encapsulated QDs and this presumably negates the possible reason of CuII ion induced quenching ascribed to its binding with surface groups or replacement of metal sites as proposed by several groups previously.
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Affiliation(s)
- Somashree Kundu
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700098, India
| | - Susmita Maiti
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700098, India
| | - Debasmita Ghosh
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700098, India
| | - Chandra Nath Roy
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700098, India
| | - Abhijit Saha
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700098, India
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Patra SK, Bhushan B, Priyam A. Water-soluble, luminescent ZnTe quantum dots: supersaturation-controlled synthesis and self-assembly into nanoballs, nanonecklaces and nanowires. Dalton Trans 2016; 45:3918-26. [PMID: 26830257 DOI: 10.1039/c5dt04142b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A supersaturation-controlled aqueous synthesis route has been developed for ZnTe quantum dots (QDs) with high monodispersity, size tunability, stability, band-edge luminescence (full-width at half-maximum (FWHM) 10-12 nm) and negligibly small Stokes' shift (2-4 nm). The degree of supersaturation of the initial reaction mixture was varied by increasing the reagent concentration, but keeping the molar ratio Zn(2+) : thioglycolic acid : Te(2-) constant at 1 : 2.5 : 0.5. For a 10× increase in supersaturation, the photoluminescence (PL) peak underwent a 50 nm blue shift from 330 to 280 nm at pH 6. The effect was more pronounced at pH 12, where the PL peak blue-shifted by 100 nm from 327 to 227 nm. Concomitantly, the FWHM was also reduced to a low value of 10 nm, indicating high monodispersity. For a 10× change in supersaturation, the particle size decreased by 63% (from 2.2 to 0.8 nm) at pH 12, whereas it changed by 19% (from 2.1 to 1.7 nm) at pH 6. High-resolution transmission electron microscopy and selected area electron diffraction data further revealed that the QDs synthesized at higher supersaturation had a better crystallinity. These QDs exhibited the unique property of undergoing isotropic and anisotropic self-assembly, which resulted in a blue shift and a red shift in the absorption and PL spectra, respectively. Isotropic assembly into spherical nanoballs (100 nm diameter, 1 nm inter-QD separation) occurred when the QDs were stored at pH 12 for 3 weeks at room temperature. The nanoballs further self-assembled into a 'pearl necklace' arrangement. On the partial removal of the capping agents, the QDs self-organized anisotropically into nanowires (1.3 μm long and 4.6 nm in diameter). The self-assembled nanostructures showed exciton-exciton coupling and excellent PL properties, which may be useful in enhanced optoelectronics, photovoltaics and biochemical sensing.
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Affiliation(s)
- Sovan Kumar Patra
- Department of Chemical Engineering & Technology, Birla Institute of Technology, Mesra, Ranchi 835215, India
| | - Bhavya Bhushan
- Department of Physics, School of Applied Sciences, KIIT University, Patia, Bhubaneswar 751024, India
| | - Amiya Priyam
- Department of Chemistry, School of Physical and Chemical Sciences, Central University of South Bihar (Formerly, Central University of Bihar), Gaya 823001, India.
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Effect of MPS concentration on ripening kinetics and structural properties of CdS quantum dots in self-assembled thin films. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.08.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Wang B, Lu XY, Tang Y, Ben W. General Polyethyleneimine-Mediated Synthesis of Ultrathin Hexagonal Co3O4Nanosheets with Reactive Facets for Lithium-Ion Batteries. ChemElectroChem 2015. [DOI: 10.1002/celc.201500377] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bin Wang
- Hong Kong Applied Science and Technology Research Institute, Hong Kong Science Park, Shatin; Hong Kong China
| | - Xiao-Ying Lu
- Faculty of Science and Technology; Technological and Higher Education Institute of Hong Kong, Tsing Yi Island, New Territories; Hong Kong China
| | - Yuanyuan Tang
- School of Environmental Science and Engineering; South University of Science and Technology of China; Shenzhen 518055 P. R. China
| | - Weiwei Ben
- Key Laboratory of Aquatic Science and Technology; Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing 100085 P. R. China
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Tiwari A, Dhoble SJ, Kher RS. Influence of thiol capping on the photoluminescence properties of L-cysteine-, mercaptoethanol- and mercaptopropionic acid-capped ZnS nanoparticles. LUMINESCENCE 2015; 30:1148-52. [PMID: 25683960 DOI: 10.1002/bio.2877] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 01/11/2015] [Indexed: 11/12/2022]
Abstract
Mercaptoethanol (ME), mercaptopropionic acid (MPA) and L-cysteine (L-Cys) having -SH functional groups were used as surface passivating agents for the wet chemical synthesis of ZnS nanoparticles. The effect of the thiol group on the optical and photoluminescence (PL) properties of ZnS nanoparticles was studied. L-Cysteine-capped ZnS nanoparticles showed the highest PL intensity among the studied capping agents, with a PL emission peak at 455 nm. The PL intensity was found to be dependent on the concentration of Zn(2+) and S(2-) precursors. The effect of buffer on the PL intensity of L-Cys-capped ZnS nanoparticles was also studied. UV/Vis spectra showed blue shifting of the absorption edge.
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Affiliation(s)
- A Tiwari
- Department of Chemistry, Government Lahiri College, Chirimiri, 497449, India
| | - S J Dhoble
- Department of Physics, RTM Nagpur University, Nagpur, 440033, India
| | - R S Kher
- Department of Physics, Government E. R. R. Science PG College, Bilaspur, 495006, India
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Kaur J, Sharma M, Pandey OP. Effect of pH on Size of ZnS Nanoparticles and Its Application for Dye Degradation. PARTICULATE SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1080/02726351.2014.952802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Zhang G, Li C, Zhang X, Guo X, Liu Y, He W, Liu J, Wang H, Gao Y. Biogenic synthesis of photocatalytically active ZnS/ESM composites. RSC Adv 2014. [DOI: 10.1039/c4ra00021h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Vallejo-Sánchez D, Beobide G, Castillo O, Lanchas M. Zinc Thiocarboxylate Complexes as Precursors for Zinc Sulfide Nanoparticles under Aerobic Conditions. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300649] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chen WT, Lin YK, Yang TT, Pu YC, Hsu YJ. Au/ZnS core/shell nanocrystals as an efficient anode photocatalyst in direct methanol fuel cells. Chem Commun (Camb) 2013; 49:8486-8. [DOI: 10.1039/c3cc43298j] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Lata S, Batra B, Pundir C. Construction of d-amino acid biosensor based on d-amino acid oxidase immobilized onto poly (indole-5-carboxylic acid)/zinc sulfide nanoparticles hybrid film. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.07.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Pan S, Liu X. ZnS–Graphene nanocomposite: Synthesis, characterization and optical properties. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2012.02.048] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide. J Colloid Interface Sci 2012; 377:58-63. [DOI: 10.1016/j.jcis.2012.03.073] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 03/23/2012] [Accepted: 03/24/2012] [Indexed: 11/20/2022]
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17
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Growth, stability, optical and photoluminescent properties of aqueous colloidal ZnS nanoparticles in relation to surfactant molecular structure. J Colloid Interface Sci 2011; 360:497-507. [DOI: 10.1016/j.jcis.2011.04.079] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 04/14/2011] [Accepted: 04/19/2011] [Indexed: 11/22/2022]
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Kozák O, Praus P, Kočí K, Klementová M. Preparation and characterization of ZnS nanoparticles deposited on montmorillonite. J Colloid Interface Sci 2010; 352:244-51. [DOI: 10.1016/j.jcis.2010.09.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 09/02/2010] [Accepted: 09/06/2010] [Indexed: 10/19/2022]
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Ma L, Chen W. ZnS:Cu,Co water-soluble afterglow nanoparticles: synthesis, luminescence and potential applications. NANOTECHNOLOGY 2010; 21:385604. [PMID: 20798470 DOI: 10.1088/0957-4484/21/38/385604] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cu(2+) and Co(2+) co-doped zinc sulfide water-soluble nanoparticles (ZnS:Cu,Co) were prepared and their afterglow luminescence was observed and reported for the first time. The nanoparticles have a cubic zinc blende structure with average sizes of about 4 nm as determined by high-resolution transmission electron microscopy (HRTEM) and x-ray diffraction (XRD). In the photoluminescence, two emission peaks are observed at 470 and 510 nm. However, in the afterglow, only one peak is observed at around 525 nm. The blue emission at 470 nm is from surface states and the green emission at 525 nm is from Cu(2+). This means that Cu(2+) is responsible for the afterglow from the nanoparticles, while the co-doping of Co(2+) is critical for the afterglow because no afterglow could be seen without co-doping with Co(2+). The successful observation of the afterglow from water-soluble nanoparticles may open up new applications of afterglow phosphors in biological imaging, detection and treatment.
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Affiliation(s)
- Lun Ma
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019-0059, USA
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Uekawa N, Matsumoto T, Kojima T, Shiba F, Kakegawa K. Synthesis of stable sol of ZnS nanoparticles by heating the mixture of ZnS precipitate and ethylene glycol. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chen WT, Hsu YJ. L-cysteine-assisted growth of core-satellite ZnS-Au nanoassemblies with high photocatalytic efficiency. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5918-5925. [PMID: 20000341 DOI: 10.1021/la904389y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Core-satellite ZnS-Au nanoassemblies, in which each of the ZnS nanospheres was surrounded by a few Au nanoparticles, have been successfully prepared with a facile L-cysteine-assisted hydrothermal approach. The density of Au nanoparticles encircling each ZnS nanosphere can be readily controlled through suitably modulating the concentration of Au added. Because of the difference in band structures between ZnS and Au, a pronounced photoinduced charge separation was observed for the as-synthesized ZnS-Au nanoassemblies. As compared to the relevant commercial products like Au-loaded P-25 TiO(2) and ZnS powders, ZnS-Au nanoassemblies exhibited superior photocatalytic performance, demonstrating their potential as an efficient photocatalyst in relevant redox reactions. Furthermore, the recycling test revealed that core-satellite nanoassemblies of ZnS-Au could be promisingly utilized in the long-term course of photocatalysis. The present study provides a new paradigm for designing the highly efficient semiconductor/metal hybrid photocatalysts that can effectively produce chemical energy from light.
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Affiliation(s)
- Wei-Ta Chen
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan 30010, Republic of China
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Liang H, Raitano JM, Zhang L, Chan SW. Controlled synthesis of Co3O4 nanopolyhedrons and nanosheets at low temperature. Chem Commun (Camb) 2009:7569-71. [DOI: 10.1039/b914447a] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Thangadurai P, Balaji S, Manoharan PT. Surface modification of CdS quantum dots using thiols-structural and photophysical studies. NANOTECHNOLOGY 2008; 19:435708. [PMID: 21832712 DOI: 10.1088/0957-4484/19/43/435708] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study is aimed at identifying a suitable organic thiol for CdS by studying its structural, thermal and photophysical characteristics. Quantum dots of the II-VI semiconductor CdS, in the size regime of 2.0-3.3 nm, were prepared in the cubic phase by a wet chemical method. Five organic thiols were used for capping: (i) 1,4-dithiothreitol (DTT), (ii) 2-mercaptoethanol (ME), (iii) cysteine (Cys), (iv) methionine (Meth), and (v) glutathione (GSH). Structural studies were carried out by x-ray diffraction (XRD) and transmission electron microscopy (TEM), which revealed the cubic phase of CdS. Optical properties were studied by FT-IR, UV-visible and fluorescence spectroscopic techniques, and a comparison was made between uncapped and capped CdS. FT-IR studies suggested two different bonding mechanisms of the capping agents with the CdS. GSH and DTT capped CdS showed significant decrease in absorption wavelengths. An increase in band gap was observed in two cases: when (i) capped and (ii) decreased in size. The band gap was increased from 2.50 eV for the uncapped to 2.77 eV for the DTT capped CdS. DTT was found to be the best capping agent for CdS among these five organic thiols in two aspects: (i) yielding lower grain size in cubic phase, and (ii) good fluorescence properties with efficient quenching of the surface traps.
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