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Synthesis of Copper Metal Organic Framework Based on Schiff Base Tricarboxylate Ligand for Highly Selective and Sensitive Detection of 2,4,6-Trinitrophenol in Aqueous Medium. J Fluoresc 2021; 31:1959-1973. [PMID: 34564823 DOI: 10.1007/s10895-021-02823-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/08/2021] [Indexed: 10/20/2022]
Abstract
By using Schiff base tricarboxylate ligand 5-(4-carboxybenzylideneamino)isophthalic acid (H3CIP), a new imine functionalized copper metal organic framework (MOF) has been synthesized solvothermally. It was fully characterized by Fourier Transform Infrared (FTIR) Spectroscopy, Powder X-Ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), and elemental mapping techniques. The as-synthesized MOF has been utilized as fluorescent probe for detection of nitro aromatic explosives (NAEs). The results show that the copper MOF can be developed into highly selective and sensitive sensor for detection of TNP in the aqueous medium via the "turn-off" quenching response. The linear fitting of the Stern-Volmer plot for TNP offered large quenching constant of 1.07 × 104 M-1 for Cu-MOF indicating the high sensitivity of the sensing process. Outstanding sensitivity of prepared material towards TNP detection was further validated by the low detection limit of 80 ppb (0.35 µM). The detailed mechanistic studies for their mode of action and density functional theory (DFT) calculations reveals that photo-induced electron transfer (PET) and fluorescence resonance energy transfer (FRET) processes, as well as electrostatic interactions (i.e. H-bonding) are the key factors for the turn-off response toward TNP by this fluorescent sensor. Thus, this new LMOF owing to their high water stability and remarkable functional features are potential candidates which can be developed into selective and sensitive TNP detection devices.
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52
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Ramoğlu B, Gümrükçüoğlu A, Çekirge E, Ocak M, Ocak Ü. One Spot Microwave Synthesis and Characterization of Nitrogen-Doped Carbon Dots with High Oxygen Content for Fluorometric Determination of Banned Sudan II Dye in Spice Samples. J Fluoresc 2021; 31:1587-1598. [PMID: 34342798 DOI: 10.1007/s10895-021-02795-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
A simple microwave-assisted synthesis of nitrogen-doped carbon dots with high oxygen content (O-N-CDs) was carried out with citric acid as a carbon source and 2,4-diamino-6-methyl-1,3,5-triazine as a nitrogen source in triethylene glycol (TEG) media. It was determined by SEM analysis that O-N-CDs consisted of particles of different sizes and shapes. Transmission electron microscopy (TEM), Raman spectroscopy, and X-ray diffraction (XRD) analysis confirmed that O-N-CDs have a graphitic structure. Moreover, they showed a high fluorescence property based on the excitation wavelength. Therefore, a new fluorometric method was developed for the determination of banned food dye Sudan II by using the O-N-CDs. The proposed method was used in the determination of Sudan II in spiked spice samples. The detection limit was 0.6 mg L-1 and the linear range was 0-8 mg L-1.
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Affiliation(s)
- Bahtışen Ramoğlu
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Abidin Gümrükçüoğlu
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Ender Çekirge
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Miraç Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Ümmühan Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey.
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53
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Tsai IH, Li JT, Chang CW. Effects of Sonication and Hydrothermal Treatments on the Optical and Chemical Properties of Carbon Dots. ACS OMEGA 2021; 6:14174-14181. [PMID: 34124440 PMCID: PMC8190798 DOI: 10.1021/acsomega.1c00765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
In our study, we have tested the effects of sonication and hydrothermal treatments on the properties of carbon dots synthesized from a microwave-assisted method (C-dotsMW). When the carbon dots are sonicated in an aerobic environment, the fluorescence quantum yield decreases drastically because the molecular fluorophores attached to the surface of the carbon dots are oxidized during the sonication process. Meanwhile, the sonicated C-dotsMW also lose their Hg2+ ion sensing and photoreduction activity due to the oxidization of surface functional groups. After the hydrothermal treatment, the fluorescence quantum yield of C-dotsMW increases due to the formation of new fluorophores; however, the Hg2+ ion sensitivity and photoreduction activity of C-dotsMW decrease significantly due to the oxidization of surface functional groups. By autoclaving the C-dotsMW at 100 °C, we have demonstrated that we can enhance the fluorescence quantum yield of C-dotsMW without losing their Hg2+ ion sensitivity. This finding can be used to improve the fluorescence quantum yield of the fluorescent ion sensor based on C-dots.
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Affiliation(s)
- I-Hua Tsai
- Department of Chemistry, National Changhua University of Education, No. 1 Jin-De Road, Changhua City 50058, Taiwan
| | - Jyun-Ting Li
- Department of Chemistry, National Changhua University of Education, No. 1 Jin-De Road, Changhua City 50058, Taiwan
| | - Chih-Wei Chang
- Department of Chemistry, National Changhua University of Education, No. 1 Jin-De Road, Changhua City 50058, Taiwan
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54
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Roshni V, Gujar V, Muntjeeb S, Doshi P, Ottoor D. Novel and Reliable Chemosensor Based on C. dots from Sunflower seeds for the Distinct Detection of Picric Acid and Bilirubin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 250:119354. [PMID: 33387803 DOI: 10.1016/j.saa.2020.119354] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 11/24/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Based on the green chemistry approach, highly fluorescent and novel carbon dots (C. dots) were synthesized from naturally available and cost effective sunflower seeds. The obtained C. dots showed a fluorescence quantum yield (Q.Y) of 9.5% with high water dispersibility and photostability. The obtained C. dots were employed for the detection of picric acid (PA) and bilirubin. A good linear relationship in the range of 20-60 nM was obtained for PA with a limit of detection (LOD) as low as 3.86 nM. C. dots were successfully incorporated in the agarose matrix which enabled them to be employed as a solid platform for the in situ detection of PA. The fluorescence of C. dots was selectively quenched by bilirubin compared to other biomolecules with a LOD of 2.03 μM. Use of C. dots as potential candidate for bilirubin detection was verified by real sample analysis. Further, the separation of C. dots was performed using column chromatography and the optical properties of the two different fractions obtained were studied. The blue fraction of C. dots was found to exhibit a higher fluorescence Q.Y and excitation independent emission, with an improved detection of PA and bilirubin.
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Affiliation(s)
- V Roshni
- Department of Chemistry, Savitribai Phule Pune University, Pune, India
| | - Varsha Gujar
- Department of Chemistry, Savitribai Phule Pune University, Pune, India
| | - Syed Muntjeeb
- Department of Chemistry, Savitribai Phule Pune University, Pune, India
| | - Pooja Doshi
- Department of Chemistry, Savitribai Phule Pune University, Pune, India
| | - Divya Ottoor
- Department of Chemistry, Savitribai Phule Pune University, Pune, India.
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55
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GÜmrÜkÇÜoĞlu A, BaŞoĞlu A, BaŞoĞlu S, BaŞoĞlu S, BaŞoĞlu M, BaŞoĞlu M, BaŞoĞlu Ü. Highly sensitive fluorometric method based on nitrogen-doped carbon dot clusters for tartrazine determination in cookies samples. Turk J Chem 2021; 44:99-111. [PMID: 33488146 PMCID: PMC7751817 DOI: 10.3906/kim-1903-28] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 10/21/2019] [Indexed: 01/02/2023] Open
Abstract
Nitrogen-doped carbon nanodots (CDs) were prepared via the solvothermal method, using urea and triethylene glycol as the starting materials. The as-prepared CDs had individual diameters of approximately 100 nm and were in clusters of different sizes. The surface composition and optical properties of the as-prepared CDs were characterized. They exhibited multicolor emission properties in the visible range when excited with a wide wavelength range. The aqueous solution of the CDs was used in highly sensitive tartrazine determination. The fluorescence quenching of the CDs was in a linear relationship with the concentrations of tartrazine in the range of 0.5–30.0 μM. The detection limit of the assay was 0.18 μM. Acceptable recovery results were obtained via spike-recovery experiments on cookie samples.
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Affiliation(s)
- Abidin GÜmrÜkÇÜoĞlu
- Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Technical University, Trabzon Turkey
| | - Aysel BaŞoĞlu
- Department of Occupational Health and Safety, Faculty of Health Sciences, Gümüşhane University, Gümüşhane Turkey
| | - Sevgi BaŞoĞlu
- Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Technical University, Trabzon Turkey
| | - Saliha BaŞoĞlu
- Organic Farming Management, Çumra School of Applied Sciences, Selçuk University, Konya Turkey
| | - Meryem BaŞoĞlu
- Advanced Technology Research & Application Center, Çumra Vocational School, Selçuk University, Konya Turkey
| | - Miraç BaŞoĞlu
- Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Technical University, Trabzon Turkey
| | - Ümmühan BaŞoĞlu
- Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Technical University, Trabzon Turkey
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56
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Das S, Ngashangva L, Goswami P. Carbon Dots: An Emerging Smart Material for Analytical Applications. MICROMACHINES 2021; 12:84. [PMID: 33467583 PMCID: PMC7829846 DOI: 10.3390/mi12010084] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/09/2021] [Accepted: 01/12/2021] [Indexed: 12/16/2022]
Abstract
Carbon dots (CDs) are optically active carbon-based nanomaterials. These nanomaterials can change their light emission properties in response to various external stimuli such as pH, temperature, pressure, and light. The CD's remarkable stimuli-responsive smart material properties have recently stimulated massive research interest for their exploitation to develop various sensor platforms. Herein, an effort has been made to review the major advances made on CDs, focusing mainly on its smart material attributes and linked applications. Since the CD's material properties are largely linked to their synthesis approaches, various synthesis methods, including surface passivation and functionalization of CDs and the mechanisms reported so far in their photophysical properties, are also delineated in this review. Finally, the challenges of using CDs and the scope for their further improvement as an optical signal transducer to expand their application horizon for developing analytical platforms have been discussed.
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Affiliation(s)
| | | | - Pranab Goswami
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; (S.D.); (L.N.)
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57
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Tadesse A, Hagos M, Belachew N, Murthy HCA, Basavaiah K. Enhanced photocatalytic degradation of Rhodamine B, antibacterial and antioxidant activities of green synthesised ZnO/N doped carbon quantum dot nanocomposites. NEW J CHEM 2021. [DOI: 10.1039/d1nj04036g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In order to explore an alternative photocatalyst for environmental remediation, we report a two-step process for the synthesis of zinc oxide/nitrogen doped carbon quantum dot nanocomposites (ZnO@NCQD NCs).
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Affiliation(s)
- Aschalew Tadesse
- Department of Applied Chemistry, Adama Science and Technology University, Adama-1888, Ethiopia
| | - Mebrahtu Hagos
- Faculty of Natural and Computational Sciences, Woldia University, Woldia-400, Ethiopia
| | - Neway Belachew
- Department of Chemistry, Debre Berhan University, Debre Berhan, Ethiopia
| | - H. C. Ananda Murthy
- Department of Applied Chemistry, Adama Science and Technology University, Adama-1888, Ethiopia
| | - K. Basavaiah
- Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam-530003, India
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58
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Potentiometric Carbon Quantum Dots-Based Screen-Printed Arrays for Nano-Tracing Gemifloxacin as a Model Fluoroquinolone Implicated in Antimicrobial Resistance. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors9010008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Antimicrobial resistance (AMR) is a neglected issue that poses a serious global threat to public health, causing long-term negative consequences at both humanitarian and economic levels. Herein, we report an unprecedented economic fabrication method of seven potentiometric screen-printed sensors for the ultra-trace determination of gemifloxacin (GEMI) as a model of the fluoroquinolones antibiotics deeply involved in the growing AMR problem. Sensors were constructed by depositing homemade carbon ink on a recycled X-ray sheet, patterned using stencils printed with an office printer in simple, cost-effective steps requiring no sophisticated equipment. Four sensors were modified using carbon quantum dots (CQDs) synthesized from dextrose through a single-step method. Sensors exhibited a linear response in the concentration ranges 10−5–10−2 M (sensors 1, 3 and 4), 10−6–10−3 M (sensor 2) and 10−6–10−2 M (sensors 5, 6 and 7). LOD allowed tracing of the target drug at a nano-molar level down to 210 nM. GEMI was successfully determined in pharmaceutical formulations and different water samples without any pretreatment steps with satisfactory recovery (96.93–105.28% with SD values < 3). All sensors revealed a long lifetime of up to several months and are considered promising tools for monitoring water quality and efficiency of water treatment measures.
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59
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Kaur P, Choudhury D. Functionality of receptor targeted zinc-insulin quantum clusters in skin tissue augmentation and bioimaging. J Drug Target 2020; 29:541-550. [PMID: 33307859 DOI: 10.1080/1061186x.2020.1864740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Quantum clusters with target specificity are suitable for tissue-specific imaging. In the present work, amorphous zinc insulin quantum clusters (IZnQCs) had been synthesised to promote and monitor wound recovery. Easy synthesis, biocompatibility, stability, enhanced quantum yield, and solubility made the cluster suitable for preclinical/clinical exploration. Zn2+ is known for its binding to insulin hexamer. Here we report the reformation of the structure in a quantum cluster form in the presence of Zn2+. The formation of IZnQCs was confirmed by the change in zeta potential from -25.6 mV to -17.9 mV and also the formation of protein metal interaction was confirmed in FTIR bands at 450, 480, and 613 cm-1 for Zn-O, Zn-N, and Zn-S, respectively. HRTEM-EDS and SAED data analysis showed an amorphous nature of the cluster. The binding of IZnQCs to the cells has been confirmed using confocal microscopy. IZnQCs showed a synergistic effect in wound recovery than insulin or Zn2+ alone. Further due to high fluorescence this recovery process can be monitored under an appropriate setup. Wound healing promotional activity, target specificity, and fluorescence properties make the IZnQCs ideal to use for bioimaging along with promoting and monitoring of wound recovery agent.
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Affiliation(s)
- Pawandeep Kaur
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, India
| | - Diptiman Choudhury
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, India.,Thapar Institute of Engineering and Technology - Virginia Tech Centre for Excellence in Material Sciences, Thapar Institute of Engineering and Technology, Patiala, Punjab, India
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60
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Time of Flight Size Control of Carbon Nanoparticles Using Ar+CH4 Multi-Hollow Discharge Plasma Chemical Vapor Deposition Method. Processes (Basel) 2020. [DOI: 10.3390/pr9010002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As the application of nanotechnology increases continuously, the need for controlled size nanoparticles also increases. Therefore, in this work, we discussed the growth mechanism of carbon nanoparticles generated in Ar+CH4 multi-hollow discharge plasmas. Using the plasmas, we succeeded in continuous generation of hydrogenated amorphous carbon nanoparticles with controlled size (25–220 nm) by the gas flow. Among the nanoparticle growth processes in plasmas, we confirmed the deposition of carbon-related radicals was the dominant process for the method. The size of nanoparticles was proportional to the gas residence time in holes of the discharge electrode. The radical deposition developed the nucleated nanoparticles during their transport in discharges, and the time of flight in discharges controlled the size of nanoparticles.
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61
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Yang X, Guo Y, Liang S, Hou S, Chu T, Ma J, Chen X, Zhou J, Sun R. Preparation of sulfur-doped carbon quantum dots from lignin as a sensor to detect Sudan I in an acidic environment. J Mater Chem B 2020; 8:10788-10796. [PMID: 33156321 DOI: 10.1039/d0tb00125b] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
To achieve a rapid and facile quantitative evaluation of Sudan I illegally added in ketchup, fluorescent carbon quantum dots with excellent stability in acidic environments are required as the actual pH value of ketchup is close to 4.0. In this paper, we developed a green approach to prepare sulfur-doped carbon quantum dots (SCQDs) via hydrothermal treatment of lignin, isolated from pre-hydrolysis liquor, in sulfuric acid solution. The resultant SCQDs from lignin possessed sulfur-containing groups, which exhibited excellent fluorescence with a quantum yield up to 13.5% and good stability in acidic environments with a wide pH range of 0-5.0. Therefore, the SCQDs were successfully employed as a sensor to detect Sudan I in acidic solutions with excellent selectivity and sensitivity. The linear range for Sudan I was 0-40 μM, while the limit of detection was 0.12 μM. In addition, the fluorescent indicator paper functionalized with SCQDs also showed outstanding selectivity to Sudan I. The proposed SCQD sensing system not only displayed application potential for quantitative evaluation of Sudan I dye in practical samples, but also provided a way to convert lignin-based waste into highly valued nanoscale materials.
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Affiliation(s)
- Xiaoxu Yang
- Liaoning Key Laboratory of Pulp and Paper Engineering, Dalian Polytechnic University, Dalian, 116034, China.
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62
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Kang HJ, Bari GAKMR, Lee TG, Khan TT, Park JW, Hwang HJ, Cho SY, Jun YS. Microporous Carbon Nanoparticles for Lithium-Sulfur Batteries. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2012. [PMID: 33053839 PMCID: PMC7600815 DOI: 10.3390/nano10102012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 11/16/2022]
Abstract
Rechargeable lithium-sulfur batteries (LSBs) are emerging as some of the most promising next-generation battery alternatives to state-of-the-art lithium-ion batteries (LIBs) due to their high gravimetric energy density, being inexpensive, and having an abundance of elemental sulfur (S8). However, one main, well-known drawback of LSBs is the so-called polysulfide shuttling, where the polysulfide dissolves into organic electrolytes from sulfur host materials. Numerous studies have shown the ability of porous carbon as a sulfur host material. Porous carbon can significantly impede polysulfide shuttling and mitigate the insulating passivation layers, such as Li2S, owing to its intrinsic high electrical conductivity. This work suggests a scalable and straightforward one-step synthesis method to prepare a unique interconnected microporous and mesoporous carbon framework via salt templating with a eutectic mixture of LiI and KI at 800 °C in an inert atmosphere. The synthesis step used environmentally friendly water as a washing solvent to remove salt from the carbon-salt mixture. When employed as a sulfur host material, the electrode exhibited an excellent capacity of 780 mAh g-1 at 500 mA g-1 and a sulfur loading mass of 2 mg cm-2 with a minor capacity loss of 0.36% per cycle for 100 cycles. This synthesis method of a unique porous carbon structure could provide a new avenue for the development of an electrode with a high retention capacity and high accommodated sulfur for electrochemical energy storage applications.
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Affiliation(s)
- Hui-Ju Kang
- Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (H.-J.K.); (G.A.K.M.R.B.); (T.-G.L.); (J.-W.P.)
| | - Gazi A. K. M. Rafiqul Bari
- Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (H.-J.K.); (G.A.K.M.R.B.); (T.-G.L.); (J.-W.P.)
| | - Tae-Gyu Lee
- Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (H.-J.K.); (G.A.K.M.R.B.); (T.-G.L.); (J.-W.P.)
| | - Tamal Tahsin Khan
- Department of Materials Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea;
| | - Jae-Woo Park
- Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (H.-J.K.); (G.A.K.M.R.B.); (T.-G.L.); (J.-W.P.)
| | - Hyun Jin Hwang
- School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea;
| | - Sung Yong Cho
- Department of Environment and Energy Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Young-Si Jun
- Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (H.-J.K.); (G.A.K.M.R.B.); (T.-G.L.); (J.-W.P.)
- School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea;
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63
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Ajith MP, Priyadarshini E, Rajamani P. Effective and selective removal of heavy metals from industrial effluents using sustainable Si-CD conjugate based column chromatography. BIORESOURCE TECHNOLOGY 2020; 314:123786. [PMID: 32673782 DOI: 10.1016/j.biortech.2020.123786] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/27/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
The present investigation deals with the green synthesis of aqueous-stable and highly fluorescent carbon dots (CD) by hydrothermal treatment of tender leaf extract of Ficus benghalensis. The synthesized CD was characterized. Carbon dots were of an average size of 2.28 nm with a blue-green fluorescence emission at 317 nm and showed high selectivity and specificity for iron and nickel amongst the different tested heavy metals with a LOD of 0.0015 μmol/mL and 0.000014 μmol/mL respectively. Further, we functionalized silica with the prepared carbon dot to generate an adsorbent for purification of contaminated water. A short bed adsorbed column system was designed for determining the efficiency of adsorption. As envisioned approximately, 77% and 74% removal of Fe and Ni was observed when the metal salts were eluted individually. Purification efficacy was analysed using an industrial electroplating effluent, which showed adsorption of 74% and 79% for Fe and Ni respectively.
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Affiliation(s)
- M P Ajith
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Eepsita Priyadarshini
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Paulraj Rajamani
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
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64
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Kim K, Chokradjaroen C, Saito N. Solution plasma: new synthesis method of N-doped carbon dots as ultra-sensitive fluorescence detector for 2,4,6-trinitrophenol. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/abb9fa] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Abstract
Herein, we report the synthesis of nitrogen-doped carbon dots (NCDs) through solution plasma (SP) for the first time. The SP method occurs a rapid dissociation of molecules, such as organic compounds, caused by an electrical discharge between electrodes immersed in a solution. The dissociation can result in the creation of various radicals such as ·C2, ·CN, and ·H which enable the rapid synthesis of carbon dots (CDs). The unique reaction of radicals allowed the formation of CDs with high N concentration and functionalization of the surface in a short time. In this study, by using the SP method, a very fine NCDs with size of 6 nm were synthesized from a pyridine/water mixture in just 10 min. Bright blue fluorescence (410 nm) with a high quantum yield (61%) was observed due to the high N concentration and the surface passivation. From the potential application point of view, the synthesized NCDs showed an excellent detection property for 2,4,6-trinitrophenol (TNP) by fluorescence quenching effect. It was due to rich amino-functional groups which act as a reaction pathway to TNP. This phenomenon was caused by the synergetic effect of a photo-induced electron transfer with the assistance of proton transfer-assisted electron transfer.
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65
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Şimşek S, Şüküroğlu AA, Yetkin D, Özbek B, Battal D, Genç R. DNA-damage and cell cycle arrest initiated anti-cancer potency of super tiny carbon dots on MCF7 cell line. Sci Rep 2020; 10:13880. [PMID: 32807820 PMCID: PMC7431908 DOI: 10.1038/s41598-020-70796-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 07/13/2020] [Indexed: 11/25/2022] Open
Abstract
While carbon-based materials have spearheaded numerous breakthroughs in biomedicine, they also have procreated many logical concerns on their overall toxicity. Carbon dots (CDs) as a respectively new member have been extensively explored in nucleus directed delivery and bioimaging due to their intrinsic fluorescence properties coupled with their small size and surface properties. Although various in vitro/in vivo studies have shown that CDs are mostly biocompatible, sufficient information is lacking regarding genotoxicity of them and underlying mechanisms. This study aims to analyze the real-time cytotoxicity of super tiny CDs (2.05 ± 0.22 nm) on human breast cancer cells (MCF7) and human primary dermal fibroblast cell cultures (HDFa) by xCELLigence analysis system for further evaluating their genotoxicity and clastogenicity to evaluate the anti-tumor potential of CDs on breast adenocarcinoma. As combined with flow cytometry studies, comet assay and cytokinesis-block micronucleus assay suggest that the CDs can penetrate to the cell nuclei, interact with the genetic material, and explode DNA damage and G0/G1 phase arrest in cancer cells even at very low concentrations (0.025 ppm) which provide a strong foundation for the design of potentially promising CD-based functional nanomaterials for DNA-damage induced treatment in cancer therapy.
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Affiliation(s)
- Sinem Şimşek
- Department of Chemical Engineering, Yıldız Technical University, 34210, Esenler, Istanbul, Turkey
| | - Ayça Aktaş Şüküroğlu
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Gazi University, 06330, Ankara, Turkey
| | - Derya Yetkin
- Advanced Technology Research and Application Center, Mersin University, 33343, Mersin, Turkey
| | - Belma Özbek
- Department of Chemical Engineering, Yıldız Technical University, 34210, Esenler, Istanbul, Turkey
| | - Dilek Battal
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Mersin University, 33169, Yenişehir, Mersin, Turkey.
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Near East University, 99138, Nicosia, Cyprus.
| | - Rükan Genç
- Department of Chemical Engineering, Faculty of Engineering, Mersin University, 33343, Yenişehir, Mersin, Turkey.
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66
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Verhagen A, Kelarakis A. Carbon Dots for Forensic Applications: A Critical Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1535. [PMID: 32764380 PMCID: PMC7466432 DOI: 10.3390/nano10081535] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/03/2020] [Accepted: 08/03/2020] [Indexed: 12/17/2022]
Abstract
Owing to their superior fluorescence performance, inexpensive synthesis and nontoxic nature, carbon dots (C-dots) are systematically explored in a variety of applications; in this review, we outline and critically discuss recent trends with respect to their potential exploitation in criminal investigation, forensic toxicology and anti-counterfeit interventions. Capitalising on their colour-tuneable behaviour (in the sense that they adopt different colours with respect to the incident radiation), C-dot-based compositions are ideal for the visual enhancement of latent fingerprints, affording improved contrast against multicoloured and patterned backgrounds. As highly sensitive and highly selective optical nanoprobes, C-dots show excellent analytical performance in detecting biological compounds, drugs, explosives, heavy metals and poisonous reactants. In addition, benefiting from their versatile structural and chemical composition, C-dots can be incorporated into ink and polymeric formulations capable of functioning as a new generation of cost-effective barcodes and security nanotags for object authentication and anti-counterfeit applications. Translating these encouraging research outcomes into real-life innovations with significant social and economic impact requires an open, multidisciplinary approach and a close synergy between materials scientists, biologists, forensic investigators and digital engineers.
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Affiliation(s)
| | - Antonios Kelarakis
- UCLan Research Centre for Smart Materials, School of Natural Sciences, University of Central Lancashire, Preston PR1 2HE, UK;
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67
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Díaz-Álvarez M, Martín-Esteban A. Fluorescent carbonaceous materials isolated from cigarette ashes for the determination of iron(iii) in water samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3523-3529. [PMID: 32672267 DOI: 10.1039/d0ay01091j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the present work, ready-to-use fluorescent carbonaceous materials (CMs) were isolated from cigarette ashes by following a simple procedure based on the dispersion of ashes in water and subsequent filtration. The isolated raw material was characterized by fluorescence microscopy, Fourier transform infrared (FT-IR) spectroscopy, and dynamic light scattering (DLS) analysis. The isolated CMs displayed excitation-dependent fluorescence emission, which enables them to be used as a fluorescent probe. The developed fluorescent probe possesses high potential for sensitive and selective detection of Fe(iii) via a quenching mechanism. The decrease in fluorescence intensity was in linear relationship with the concentrations of Fe(iii) within the range of 0-89.6 μM. The fluorescent probe was successfully applied to the determination of Fe(iii) in tap and well waters with an average recovery of 87% with an excellent relative standard deviation (RSD) of 0.63%, regardless of the water sample analyzed. Besides, fluorescence variation in the presence of Fe(iii) was evaluated by analyzing red, green, and blue (RGB) channels of the fluorescence colors. Finally, the possibility of semi-quantitative determination of Fe(iii) in water by the naked eye using the proposed fluorescent probe was also evaluated.
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Affiliation(s)
- Myriam Díaz-Álvarez
- Departamento de Medio Ambiente y Agronomía, INIA, Carretera de A Coruña km 7.5, E-28040 Madrid, Spain.
| | - Antonio Martín-Esteban
- Departamento de Medio Ambiente y Agronomía, INIA, Carretera de A Coruña km 7.5, E-28040 Madrid, Spain.
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68
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Mahala C, Sharma MD, Basu M. Type-II Heterostructure of ZnO and Carbon Dots Demonstrates Enhanced Photoanodic Performance in Photoelectrochemical Water Splitting. Inorg Chem 2020; 59:6988-6999. [PMID: 32369368 DOI: 10.1021/acs.inorgchem.0c00479] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hydrogen evolution through ecofriendly photoelectrochemical (PEC) water splitting is considered to be one of the most cost-effective and desirable methods for meeting ever-growing energy demands. However, the low photoconversion efficiency limits the practical applicability of PEC water splitting. To develop an efficient photoelectrode, here the morphology of ZnO is tuned from 0D to 3D. It is observed that vertically grown 2D nanosheets outperform other morphologies in PEC water splitting by generating nearly 0.414 mA cm-2 at 0 V vs Ag/AgCl. Furthermore, these perpendicularly developed 2D nanosheets of ZnO are sensitized by metal-free carbon (C) dots to improve the photoconversion efficiency of ZnO. The prepared ZnO/C dots work as an effective photoanode, which can produce a 0.831 mA cm-2 photocurrent density upon application of 0 V vs Ag/AgCl under constant illumination, which is 2 times higher than that of bare ZnO. The enhanced PEC performance of ZnO/C dots is confirmed by the photoconversion efficiency (η). The ZnO/C dots exhibit a 2-fold-higher photoconversion efficiency (η) compared to that of ZnO. Additionally, the enhancement in PEC activity of ZnO/C dots is attributed to the higher carrier concentrations in the heterostructure. Bare ZnO has a 1.77 × 1020 cm-3 carrier density, which becomes 3.70 × 1020 cm-3 after sensitization with C dots. Enhanced carrier density successively leads to higher PEC water splitting efficiency. Band alignments of ZnO and C dots indicate the creation of the type-II heterostructure, which facilitates successful charge transportation among C dots and ZnO, producing a charge-carrier separation. Two-dimensional sheets of ZnO and ZnO/C dots exhibit appreciable stability under continuous illumination for 1 and 2 h, respectively.
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Affiliation(s)
- Chavi Mahala
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Mamta Devi Sharma
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Mrinmoyee Basu
- Department of Chemistry, BITS Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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69
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Jadoon T, Mahmood T, Ayub K. Silver-graphene quantum dots based electrochemical sensor for trinitrotoluene and p-nitrophenol. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112878] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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70
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Eco-friendly synthesis of tunable fluorescent carbon nanodots from Malus floribunda for sensors and multicolor bioimaging. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112336] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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71
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Verma A, Arshad F, Ahmad K, Goswami U, Samanta SK, Sahoo AK, Sk MP. Role of surface charge in enhancing antibacterial activity of fluorescent carbon dots. NANOTECHNOLOGY 2020; 31:095101. [PMID: 31703210 DOI: 10.1088/1361-6528/ab55b8] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, different surface charged carbon dots (Cdots) were synthesized by using diethylene glycol as a carbon source with various amine containing surface passivating agents. The synthesis method is very simple and fast microwave oven-based, that results in almost similar sized positive, negative and uncharged fluorescent Cdots which has been confirmed by zeta potential analysis in our case. The formation of Cdots was confirmed by characterization using fluorescence spectroscopy, transmission electron microscopy, XRD, FT-IR, and XPS spectroscopy. To find out relative bactericidal activity of these Cdots, green fluorescence protein expressing recombinant E. coli bacteria were taken as a model system. Time-dependent bacterial growth and FACS study demonstrated that both uncharged Cdots and positively charged Cdots were showing better bactericidal activity as compared to negative charged Cdots. The Cdots caused elevation of reactive oxygen species level, which is possibly leading to bacterial cell death.
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Affiliation(s)
- Arushi Verma
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Allahabad 211012, Uttar Pradesh, India
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72
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Determination of 2,4,6-trinitrophenol by in-situ assembly of SBA-15 with multi-hydroxyl carbon dots. Anal Chim Acta 2020; 1098:170-180. [DOI: 10.1016/j.aca.2019.11.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/13/2019] [Accepted: 11/24/2019] [Indexed: 11/23/2022]
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73
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Khan ZM, Saifi S, Shumaila, Aslam Z, Khan SA, Zulfequar M. A facile one step hydrothermal synthesis of carbon quantum dots for label -free fluorescence sensing approach to detect picric acid in aqueous solution. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112201] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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74
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Sakaew C, Sricharoen P, Limchoowong N, Nuengmatcha P, Kukusamude C, Kongsri S, Chanthai S. Green and facile synthesis of water-soluble carbon dots from ethanolic shallot extract for chromium ion sensing in milk, fruit juices, and wastewater samples. RSC Adv 2020; 10:20638-20645. [PMID: 35517751 PMCID: PMC9054292 DOI: 10.1039/d0ra03101a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 05/25/2020] [Indexed: 11/21/2022] Open
Abstract
Self-functionalized carbon dots (CDs) were prepared from ethanolic shallot extract to obtain a total phenolic precursor.
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Affiliation(s)
- Chinawooth Sakaew
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
| | - Phitchan Sricharoen
- Preclinical Science Center
- Faculty of Dentistry
- Bangkokthonburi University
- Bangkok 10170
- Thailand
| | - Nunticha Limchoowong
- Department of Chemistry
- Faculty of Science
- Srinakharinwirot University
- Bangkok 10110
- Thailand
| | - Prawit Nuengmatcha
- Nanomaterials Chemistry Research Unit
- Department of Chemistry
- Faculty of Science and Technology
- Nakhon Si Thammarat Rajabhat University
- Nakhon Si Thammarat 80280
| | - Chunyapuk Kukusamude
- Nuclear Research and Development Division
- Thailand Institute of Nuclear Technology (Public Organization)
- Ongkharak
- Thailand
| | - Supalak Kongsri
- Nuclear Research and Development Division
- Thailand Institute of Nuclear Technology (Public Organization)
- Ongkharak
- Thailand
| | - Saksit Chanthai
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
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75
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Ahmed HM, Ghali M, Zahra WK, Ayad M. Optical sensing of pyridine based on green synthesis of passivated carbon dots. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.matpr.2020.05.185] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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76
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Bora A, Mohan K, Dolui SK. Carbon Dots as Cosensitizers in Dye-Sensitized Solar Cells and Fluorescence Chemosensors for 2,4,6-Trinitrophenol Detection. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anindita Bora
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
| | - Kiranjyoti Mohan
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
| | - Swapan Kumar Dolui
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
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77
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Xia C, Zhu S, Feng T, Yang M, Yang B. Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901316. [PMID: 31832313 PMCID: PMC6891914 DOI: 10.1002/advs.201901316] [Citation(s) in RCA: 437] [Impact Index Per Article: 87.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/01/2019] [Indexed: 05/02/2023]
Abstract
Despite the various synthesis methods to obtain carbon dots (CDs), the bottom-up methods are still the most widely administrated route to afford large-scale and low-cost synthesis. However, as CDs are developed with increasing reports involved in producing many CDs, the structure and property features have changed enormously compared with the first generation of CDs, raising classification concerns. To this end, a new classification of CDs, named carbonized polymer dots (CPDs), is summarized according to the analysis of structure and property features. Here, CPDs are revealed as an emerging class of CDs with distinctive polymer/carbon hybrid structures and properties. Furthermore, deep insights into the effects of synthesis on the structure/property features of CDs are provided. Herein, the synthesis methods of CDs are also summarized in detail, and the effects of synthesis conditions of the bottom-up methods in terms of the structures and properties of CPDs are discussed and analyzed comprehensively. Insights into formation process and nucleation mechanism of CPDs are also offered. Finally, a perspective of the future development of CDs is proposed with critical insights into facilitating their potential in various application fields.
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Affiliation(s)
- Chunlei Xia
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Shoujun Zhu
- Laboratory of Molecular Imaging and NanomedicineNational Institute of Biomedical Imaging and BioengineeringNational Institutes of Health35 Convent DrBethesda20892MDUSA
| | - Tanglue Feng
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Mingxi Yang
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin UniversityChangchun130012P. R. China
- State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun130033P. R. China
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78
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Lakshmanakumar M, Nesakumar N, Sethuraman S, Rajan KS, Krishnan UM, Rayappan JBB. Functionalized Graphene Quantum Dot Interfaced Electrochemical Detection of Cardiac Troponin I: An Antibody Free Approach. Sci Rep 2019; 9:17348. [PMID: 31758063 PMCID: PMC6874552 DOI: 10.1038/s41598-019-53979-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 10/29/2019] [Indexed: 12/03/2022] Open
Abstract
According to the World Health Organization (WHO), cardiovascular disease (CVD) is the leading cause of death in the world every year. The design and development of biosensors for the detection of CVD markers could be one of the major contributions of the scientific community to society. In this context, acetic acid functionalized graphene quantum dots (fGQDs) were used as an interface for the electrochemical detection of cardiac Troponin I (cTnI). The interaction of cTnI with fGQDs for the early diagnosis of acute myocardial infarction was investigated using cyclic voltammetry (CV) and amperometry. The carbodiimide conjugation between the N-H group of cTnI and the functionalized COOH group on GQDs enabled the detection of cTnI biomarker. The same sensing mechanism was confirmed using Fourier Transform Infrared Spectrometry (FTIR). The fGQDs modified Au electrode showed remarkable electrocatalytic oxidation of cTnI with good stability and sensitivity over a linear range of 0.17 to 3 ng mL−1 and a low detection limit of 0.02 ng mL−1. Bland-Altman plots substantiate a bias between the intra-/inter-cTnI assay and calibrated cTnI assay with 95% limits of agreement (mean difference ± 1.96 SD). The aim of this study is to describe an innovative method to detect cardiac biomarker cTnI and provide preliminary data on its diagnostic capacity. At the same time, its applicability in clinical setting will have to be validated with a significant number of samples collected from patients.
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Affiliation(s)
- Muthaiyan Lakshmanakumar
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613 401, India.,School of Electrical & Electronics Engineering (SEEE), SASTRA Deemed University, Thanjavur, 613 401, India
| | - Noel Nesakumar
- Electrodics & Electrocatalysis Division, Central Electrochemical Research Institute, Karaikudi, 630 006, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613 401, India.,School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur, 613 401, India
| | - K S Rajan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613 401, India.,School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur, 613 401, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613 401, India.,School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur, 613 401, India.,School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur, 613 401, India
| | - John Bosco Balaguru Rayappan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613 401, India. .,School of Electrical & Electronics Engineering (SEEE), SASTRA Deemed University, Thanjavur, 613 401, India.
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79
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Sustainable Synthesis Processes for Carbon Dots through Response Surface Methodology and Artificial Neural Network. Processes (Basel) 2019. [DOI: 10.3390/pr7100704] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Nowadays, to ensure sustainability of smart materials, it is imperative to eliminate or reduce carbon footprint related to nano material production. The concept of design of experiment to provide an optimal synthesis process, with a desired yield, is indispensable. It is the researcher’s goal to get optimum value for experiments that requires multiple runs and multiple inputs. Herein, is a reliable approach of utilizing design of experiment (DOE) for response surface methodology (RSM). Thus, to optimize a facile and effective synthesis process for fluorescent carbon dots (CDs) derived from tapioca that is in line with green chemistry principles for sustainable synthesis. The predictions for fluorescent CDs synthesis from RSM were in excellent agreement with the artificial neural network (ANN) model prediction by the Levenberg–Marquardt back propagation (LMBP) algorithm. Considering R2, root mean square error (RMSE) and mean absolute error (MAE) have all revealed a positive hidden layer size. The best hidden layer of neurons were discovered at point 4-8, to confirm the validity of carbon dots, characterization of surface morphology and particles sizes of CDs were conducted with favorable confirmations of the unique characteristics and attributes of synthesized CDs by hydrothermal route.
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80
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Wang J, Yang Y, Sun G, Zheng M, Xie Z. A convenient and universal platform for sensing environmental nitro-aromatic explosives based on amphiphilic carbon dots. ENVIRONMENTAL RESEARCH 2019; 177:108621. [PMID: 31421450 DOI: 10.1016/j.envres.2019.108621] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
2,4,6-trinitrophenol (TNP) is environmentally deleterious substance that has been of pressing societal concern. Therefore, developing a convenient and reliable platforms for its fast and efficient detection is of paramount importance from security point of view. Herein, amphiphilic fluorescent carbon dots (CDs) were prepared by a simple solvothermal method. CDs exhibit high selectivity and sensitivity on TNP in the polar and apolar solvent and even natural water samples. Moreover, the simple and portable indicator paper can be prepared conveniently and used for sensing TNP visually with high sensitivity and fast response. Research findings obtained from this study would assist in the development of portable devices for the on-site and real-time detection of environmental hazards.
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Affiliation(s)
- Jingwen Wang
- School of Chemical Engineering, School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun, Jilin, 130012, PR China
| | - Yushan Yang
- School of Chemical Engineering, School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun, Jilin, 130012, PR China
| | - Guoying Sun
- School of Chemical Engineering, School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun, Jilin, 130012, PR China
| | - Min Zheng
- School of Chemical Engineering, School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun, Jilin, 130012, PR China.
| | - Zhigang Xie
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin, 130022, PR China.
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81
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RETRACTED ARTICLE: Carbon Dots as Artificial Peroxidases for Analytical Applications. JOURNAL OF ANALYSIS AND TESTING 2019. [DOI: 10.1007/s41664-019-00107-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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82
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Lee S. A new green technology for direct synthesis of carbon nanodots with narrow size distribution. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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83
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Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice. JOURNAL OF NANOTECHNOLOGY 2019. [DOI: 10.1155/2019/2852816] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Highly luminescent carbon dots (C-dots) were synthesized by the one-pot simple hydrothermal method directly from lemon juice using different temperatures, time, aging of precursors, and diluted solvents to control the luminescence of C‐dots. The obtained C-dots were characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectrophotometry, dynamic light scattering, ultraviolet-visible spectrophotometry, and photoluminescent spectrophotometry. The results show that C‐dots had strong green light emission with quantum yield in the range of 14.86 to 24.89% as a function of hydrothermal temperatures. Furthermore, light emission that is dependent on hydrothermal time, aging of precursor, and diluted solvent was observed. These results suggest that the C‐dots have potential application in optoelectronics and bioimaging.
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84
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Nekoueian K, Amiri M, Sillanpää M, Marken F, Boukherroub R, Szunerits S. Carbon-based quantum particles: an electroanalytical and biomedical perspective. Chem Soc Rev 2019; 48:4281-4316. [DOI: 10.1039/c8cs00445e] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Carbon-based quantum particles, especially spherical carbon quantum dots (CQDs) and nanosheets like graphene quantum dots (GQDs), are an emerging class of quantum dots with unique properties owing to their quantum confinement effect.
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Affiliation(s)
- Khadijeh Nekoueian
- Department of Chemistry
- University of Mohaghegh Ardabili
- Ardabil
- Iran
- Department of Green Chemistry
| | - Mandana Amiri
- Department of Chemistry
- University of Mohaghegh Ardabili
- Ardabil
- Iran
| | - Mika Sillanpää
- Department of Green Chemistry
- School of Engineering Science
- Lappeenranta University of Technology
- Finland
| | - Frank Marken
- Department of Chemistry
- University of Bath
- Bath BA2 7AY
- UK
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