1
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Li J, Zhang D, Xia J. The controllable synthesis of multi-color carbon quantum dots modified by polythiophene and their application in fluorescence detection of Au 3+ and Hg 2. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124794. [PMID: 39024785 DOI: 10.1016/j.saa.2024.124794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 07/05/2024] [Accepted: 07/06/2024] [Indexed: 07/20/2024]
Abstract
Herein, hydrothermal method was used to prepare a series of multi-color polythiophene modified carbon quantum dots. Under UV excitation, fluorescence their maximum emission wavelengths appear at 612 nm, 570 nm, and 540 nm respectively. The prepared CD-BTH and CD-BN can have specific detection of Au3+ and Hg2+ through fluorescence quenching effect. The detection limits for Au3+ are 3 nM and 5.4 nM respectively, and for Hg2+ are 23 nM and 90 nM respectively. CD-KN detects Au3+ specifically through fluorescence resonance, with a detection limit of 33 nM. Under the interference of other metal ions, three types of polythiophene modified quantum carbon dots exhibit excellent selectivity for the responsive ions. Meanwhile, this article also elucidates the law that as the electron withdrawing ability of the side chains of polythiophene derivatives increasing, the fluorescence emission peaks of the prepared polythiophene modified carbon dots shifts red and the fluorescence quantum yield is higher.
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Affiliation(s)
- Jianing Li
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Dongkui Zhang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Jiangbin Xia
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China.
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2
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Xing J, Wu H, Liang T, Zhu S, Ling Q, Fan J. Highly stoichiometry-deviating chalcopyrite quantum dots: synthesis and copper defects-correlated photophysical properties. NANOTECHNOLOGY 2024; 35:465701. [PMID: 39154655 DOI: 10.1088/1361-6528/ad7099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 08/18/2024] [Indexed: 08/20/2024]
Abstract
Copper indium selenide (CISe) is a prototype infrared semiconductor with low toxicity and unique optical characteristics. Its quantum dots (QDs) accommodate ample intrinsic point defects which may actively participate in their rather complex photophysical processes. We synthesize CISe QDs with similar sizes but with distinct highly stoichiometry-deviating atomic ratios. The synthesis condition employing Se-rich precursors yields the Cu-deficient CISe QDs with special photophysical properties. The photoluminescence exhibits monotonic red shift from 680 to 775 nm when the ratio of Cu's proportion to In's decreases. The luminescence is found to stem from the copper vacancy and antisite defects. The CISe QDs exhibit Raman activity at 5.6, 6.9, and 8.7 THz that is separately assigned to Cu-Se and In-Se optical phonon modes and surface mode.
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Affiliation(s)
- Jiali Xing
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
| | - Huaxin Wu
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
| | - Tianyuan Liang
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
| | - Shiqing Zhu
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
| | - Qin Ling
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
| | - Jiyang Fan
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China
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3
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K H. A review on carbon quantum dot/semiconductor-based nanocomposites as hydrogen production photocatalysts. RSC Adv 2024; 14:23404-23422. [PMID: 39055266 PMCID: PMC11270004 DOI: 10.1039/d4ra04149f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 07/10/2024] [Indexed: 07/27/2024] Open
Abstract
Carbon quantum dots (CQDs) are discrete, quasi-spherical carbon nanoparticles with sizes below 10 nm. The properties of CQDs can be further enhanced by doping with elements such as nitrogen, phosphorous, sulphur, and boron or co-doping with heteroatoms such as nitrogen-phosphorous, nitrogen-sulphur, and nitrogen-boron. These excellent properties of CQDs can be utilized to enhance the photocatalytic performance of semiconductors. Therefore, in this review, we summarize different types of bare CQD-scaffolded semiconductors, both doped and co-doped, used for photocatalytic hydrogen production. Moreover, the detailed photocatalytic mechanism of CQD/semiconductor-based hydrogen production is reviewed. Recent progress in the design and development of CQD-based photocatalysts, along with the challenges involved, is comprehensively reviewed.
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Affiliation(s)
- Hareesh K
- Department of Physics, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education Manipal 576104 India
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4
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Nicosia A, Mineo P, Micali N, Villari V. Dopamine-Coated Carbon Nanodots: A Supramolecular Approach to Polydopamine Composite. Int J Mol Sci 2023; 24:15384. [PMID: 37895064 PMCID: PMC10607924 DOI: 10.3390/ijms242015384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/13/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
The development of biocompatible composites constituted by polydopamine and fluorescent carbon dots represents a promising way of exploiting the extraordinary adhesive properties of polydopamine for multi-purpose technologies. Here, a supramolecular complex is realized by the assembly of dopamine on the carbon dots surface, and the optical and structural properties are investigated by means of different spectroscopic techniques, from time-resolved fluorescence to Raman and NMR spectroscopies. The results suggest that the catechol unit of dopamine plays the main role in the formation of the supramolecular complex, in which carbon nanodot fluorescence emission is quenched by a photoinduced electron transfer process. The interaction with the nanodots' basic surface sites promotes the oxidation of dopamine and drives to its oligomerization/polymerization on the nanodot surface.
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Affiliation(s)
- Angelo Nicosia
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, I-95125 Catania, Italy; (A.N.); (P.M.)
| | - Placido Mineo
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, I-95125 Catania, Italy; (A.N.); (P.M.)
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d’Alcontres 37, I-98158 Messina, Italy;
| | - Norberto Micali
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d’Alcontres 37, I-98158 Messina, Italy;
| | - Valentina Villari
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d’Alcontres 37, I-98158 Messina, Italy;
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5
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Cho S, Jung CW, Lee D, Byun Y, Kim H, Han H, Kim JH, Kwon W. Predictable incorporation of nitrogen into carbon dots: insights from pinacol rearrangement and iminium ion cyclization. NANOSCALE ADVANCES 2023; 5:5613-5626. [PMID: 37822896 PMCID: PMC10563847 DOI: 10.1039/d3na00550j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023]
Abstract
Nitrogen-doped carbon dots (CDs) have attracted considerable attention across various research areas and applications due to their enhanced optical properties and photostability. However, the mechanism of nitrogen incorporation in CDs remains elusive, hampering the precise control over nitrogen-incorporated structures and the investigation of the effects of nitrogen on the electronic structure and optical properties of CDs. In this study, we employed a rational design approach, utilizing glucosamine and ethylene glycol as the carbon source and co-reagent, respectively, to synthesize N-doped CDs. Our synthesis strategy involved pinacol rearrangement and iminium ion cyclization reactions, enabling the reliable formation of N-doped CDs. Notably, the resulting CDs exhibited distinctive emissive states attributed to heteroatomic defect structures, including oxygenic and nitrogenic polycyclic aromatic hydrocarbons. To gain further insights into their energy levels and electronic transitions, we conducted comprehensive investigations, employing extended Hückel calculations and pump-probe spectroscopy. The synthesized CDs displayed great promise as bioimaging and photodynamic therapy agents, highlighting their potential for biomedical applications. Moreover, our study significantly contributes valuable insights into the rational design of N-doped CDs with controllable chemical and electronic structures, thereby paving the way for advancements in their diverse range of applications.
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Affiliation(s)
- Soohyun Cho
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Chan-Woo Jung
- Department of Energy Science, Sungkyunkwan University Suwon 16419 South Korea
| | - Dajin Lee
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Yerim Byun
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Hyemin Kim
- Department of Cosmetics Engineering, Konkuk University Seoul 05029 South Korea
| | - Hyunho Han
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine Seoul 03722 South Korea
| | - Ji-Hee Kim
- Department of Physics, Pusan National University Busan 46241 South Korea
| | - Woosung Kwon
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
- Institute of Advanced Materials and Systems, Sookmyung Women's University Seoul 04310 South Korea
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6
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Ozkasapoglu S, Caglayan MG, Akkurt F, Ensarioğlu HK, Vatansever HS, Celikkan H. Boron-Doped Carbon Nanodots as a Theranostic Agent for Colon Cancer Stem Cells. ACS OMEGA 2023; 8:30285-30293. [PMID: 37636927 PMCID: PMC10448486 DOI: 10.1021/acsomega.3c03154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/27/2023] [Indexed: 08/29/2023]
Abstract
Carbon nanodots have drawn a great deal of attention due to their green and expedient opportunities in biological and chemical sciences. Their high fluorescence capabilities and low toxicity for living cells and tissues make them excellent imaging agents. In addition, they have a fluorimetric response against inorganic and organic species. Boron-doped carbon nanodots (B-CDs) with high fluorescence yield were produced from phenylboronic acid and glutamine as boron and carbon sources, respectively, by a hydrothermal method. First, the effects of the temperature on their fluorescence yield and the structural characteristics of B-CDs were investigated. Second, their cytotoxicity and cell death and proliferation behaviors were examined. The cytotoxicity was evaluated by the MTT assay. The cellular properties were evaluated with the distribution of caspase 3, Ki67, lamin B1, P16, and cytochrome c after the indirect immunoperoxidase technique. After the MTT assay, 1:1 dilution of all applicants for 24 h was used in the study. After immunohistochemical analyses, the application of B-CDs synthesized at 230 °C did not change control cell (Vero) proliferation, and also apoptosis was not triggered. Colo 320 CD133+ and CD133- cell-triggered apoptosis and cellular senescence were found to be synthesis temperature dependent. In addition, Colo 320 CD133- cells were affected relatively more than CD133+ cells from B-CDs. While B-CDs did not affect the control cells, the colon cancer stem cells (Colo 320 CD133+) were affected in a time-dependent manner. Therefore, the use of the synthesized B-CD product may be an alternative method for controlling or eliminating cancer stem cells in the tumor tissue.
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Affiliation(s)
- Sezgin Ozkasapoglu
- Turkish
Nuclear Energy and Mineral Research Agency (TENMAK), Boron Research
Institute (BOREN), Ankara 06520, Turkey
| | - Mehmet Gokhan Caglayan
- Faculty
of Pharmacy, Department of Analytical Chemistry, Ankara University, Ankara 06560,Turkey
| | - Fatih Akkurt
- Faculty
of Engineering, Department of Chemical Engineering, Gazi University, Ankara 06570, Turkey
| | - Hilal Kabadayi Ensarioğlu
- Faculty
of Medicine, Department of Histology and Embryology, Manisa Celal Bayar University, Manisa 45030, Turkey
| | - H. Seda Vatansever
- Faculty
of Medicine, Department of Histology and Embryology, Manisa Celal Bayar University, Manisa 45030, Turkey
- DESAM
Institute, Near East University, Mersin 10, Turkey
| | - Huseyin Celikkan
- Science Faculty,
Department of Chemistry, Gazi University, Ankara 06500, Turkey
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7
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Xing Y, Yang M, Chen X. Fabrication of P and N Co-Doped Carbon Dots for Fe 3+ Detection in Serum and Lysosomal Tracking in Living Cells. BIOSENSORS 2023; 13:230. [PMID: 36831996 PMCID: PMC9954533 DOI: 10.3390/bios13020230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Doping with heteroatoms allows the retention of the general characteristics of carbon dots while allowing their physicochemical and photochemical properties to be effectively modulated. In this work, we report the preparation of ultrastable P and N co-doped carbon dots (PNCDs) that can be used for the highly selective detection of Fe3+ and the tracking of lysosomes in living cells. Fluorescent PNCDs were facilely prepared via a hydrothermal treatment of ethylenediamine and phytic acid, and they exhibited a high quantum yield of 22.0%. The strong coordination interaction between the phosphorus groups of PNCDs and Fe3+ rendered them efficient probes for use in selective Fe3+ detection, with a detection limit of 0.39 μM, and we demonstrated their practicability by accurately detecting the Fe3+ contents in bio-samples. At the same time, PNCDs exhibited high lysosomal location specificity in different cell lines due to surface lipophilic amino groups, and real-time tracking of the lysosome morphology in HeLa cells was achieved. The present work suggests that the fabrication of heteroatom-doped CDs might be an effective strategy to provide promising tools for cytology, such as organelle tracking.
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Affiliation(s)
- Yanzhi Xing
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Mei Yang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Xuwei Chen
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
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8
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Zhou J, Zhao X, Xu H, Wang Z, Zhang X, Su Z. Integration of Carbon Dots on Nanoflower Structured ZnCdS as a Cocatalyst for Photocatalytic Degradation. MATERIALS (BASEL, SWITZERLAND) 2022; 16:366. [PMID: 36614704 PMCID: PMC9821953 DOI: 10.3390/ma16010366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
The application of catalysts is one of the most effective methods in the oil refining, chemical, medical, environmental protection, and other industries. In this work, carbon dots (CDs) were selected as an initiator and doped into the main catalyst, Zn0.2Cd0.8S, and a novel Zn0.2Cd0.8S@CD composite catalyst with a nanoflower structure was successfully obtained. The synthesized composites (Zn0.2Cd0.8S@CDs) were characterized by means of SEM, TEM, XRD, FT-IR, XPS, and UV-Vis DRS. Transient photocurrent response and Nyquist curve analysis further proved that the carrier separation efficiency of the composite catalyst was significantly improved. In addition, the photocatalytic activity of Zn0.2Cd0.8S@CDs for rhodamine B removal from aqueous solution was tested under visible-light irradiation. When the amount of Zn0.2Cd0.8S@CDs composite catalyst reached 50 mg, the degradation rate of rhodamine B was 79.35%. Finally, the photocatalytic degradation mechanism of the Zn0.2Cd0.8S@CDs complex was studied. CD doping enhances the adsorption capacity of Zn0.2Cd0.8S@CDs composite catalysts due to the increase in surface area, effectively inducing charge delocalization and enhancing the photocatalytic capacity. Zn0.2Cd0.8S@CDs composites with low cost and high carrier separation efficiency have broad application prospects in the photocatalytic degradation of dyes.
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Affiliation(s)
- Jie Zhou
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xin Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Haoming Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhichao Wang
- Precision Forestry Key Laboratory of Beijing, Beijing Forestry University, Beijing 100083, China
| | - Xiaoyuan Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China
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9
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Zhang T, Gan Z, Zhen S, Hu Y, Hu X. Monitoring of glutathione using ratiometric fluorescent sensor based on MnO 2 nanosheets simultaneously tuning the fluorescence of Rhodamine 6G and thiamine hydrochloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 271:120942. [PMID: 35114634 DOI: 10.1016/j.saa.2022.120942] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/06/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
L-glutathione (GSH) which has reducibility and integrated detoxification plays an important role in maintaining normal immune system function. Its abnormal levels are relevant to some clinical diseases. In this work, a facile ratiometric fluorescence sensor for GSH was designed based on MnO2 nanosheets, Thiamine hydrochloride (VB1) and Rhodamine 6G (R6G). VB1 could be oxidized into fluorescent ox-VB1 due to the strong oxidizing property of MnO2, and MnO2 nanosheets simultaneously could quench the fluorescence of R6G based on the inner filter effect (IFE). MnO2 could react with GSH to form Mn2+, which caused its losing oxidizing property and quenching capacity. According to this principle, the concentration of ox-VB1 diminished, resulting in its fluorescence intensity decreasing at 455 nm and the fluorescence of R6G recovering at 560 nm. Under optimal conditions, the VB1-MnO2-R6G detection system showed a wide linear range towards GSH in the range of 1.0-300.0 µmolL-1 with a low detection limit reaching 0.52 µmolL-1. Furthermore, the method was also applied in the determination of GSH in human serum.
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Affiliation(s)
- Tian Zhang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Zhiwen Gan
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Shujun Zhen
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yongmei Hu
- Chengdu Second People's Hospital, Chengdu 610017, PR China
| | - Xiaoli Hu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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10
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An Overview of the Recent Developments in Carbon Quantum Dots—Promising Nanomaterials for Metal Ion Detection and (Bio)Molecule Sensing. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9060138] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The fluorescent carbon quantum dots (CQDs) represent an emerging subset of carbonaceous nanomaterials, recently becoming a powerful tool for biosensing, bioimaging, and drug and gene delivery. In general, carbon dots are defined as zero-dimensional (0D), spherical-like nanoparticles with <10 nm in size. Their unique chemical, optical, and electronic properties make CQDs versatile materials for a wide spectrum of applications, mainly for the sensing and biomedical purposes. Due to their good biocompatibility, water solubility, and relatively facile modification, these novel materials have attracted tremendous interest in recent years, which is especially important for nanotechnology and nanoscience expertise. The preparation of the biomass-derived CQDs has attracted growing interest recently due to their low-cost, renewable, and green biomass resources, presenting also the variability of possible modification for the enhancement of CQDs’ properties. This review is primarily focused on the recent developments in carbon dots and their application in the sensing of different chemical species within the last five years. Furthermore, special emphasis has been made regarding the green approaches for obtaining CQDs and nanomaterial characterization toward better understanding the mechanisms of photoluminescent behavior and sensing performance. In addition, some of the challenges and future outlooks in CQDs research have been briefly outlined.
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11
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Tummala S, Lee CH, Ho YP. Boron, and nitrogen co-doped carbon dots as a multiplexing probe for sensing of p-nitrophenol, Fe (III), and temperature. NANOTECHNOLOGY 2021; 32:265502. [PMID: 33721842 DOI: 10.1088/1361-6528/abeeb6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
Boron and nitrogen co-doped carbon dots (B, N-CDs) were fabricated through a simple, one-step hydrothermal reaction of citric acid, boric acid, and tris base. The obtained B, N-CDs exhibit excitation-dependent fluorescence, high quantum yield (QY), biocompatibility, photostability, and aqueous solubility. The QY was substantially increased to 57% by doping boron atoms. Furthermore, the fluorescence intensity of B, N-CDs was temperature-dependent and decreased linearly from 283 to 333 K. The prepared B, N-CDs were used as a fluorescence probe for the detection ofpara-nitrophenol (p-NP) and Fe (III) ions with low detection limits of 0.17μM and 0.30μM, respectively. Moreover, the presence of p-NP could be further confirmed by a colorimetric assay. The fluorescent probe has been applied to determine p-NP and Fe (III) in a spiked serum sample and spiked water samples (lake and tap water). Moreover, the as-prepared B, N-CDs were of low toxicity and capable of bioimaging.
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Affiliation(s)
- Srikrishna Tummala
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan
| | - Chia-Hung Lee
- Department of Life Science, National Dong Hwa University, Hualien 97401, Taiwan
| | - Yen-Peng Ho
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan
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