851
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Mao M, Tian T, He Y, Ge Y, Zhou J, Song G. Inner filter effect based fluorometric determination of the activity of alkaline phosphatase by using carbon dots codoped with boron and nitrogen. Mikrochim Acta 2017; 185:17. [PMID: 29594532 DOI: 10.1007/s00604-017-2541-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/09/2017] [Indexed: 12/13/2022]
Abstract
Boron and nitrogen codoped carbon dots functionalized with cyclodextrin (β-CD-N/B-C-dots) were obtained from β-cyclodextrin. The material displays strong fluorescence (with excitation/emission peak wavelengths of 400/500 nm) and was characterized by UV-vis, transmission electron microscopy and FTIR. If the substrate p-nitrophenylphosphate is enzymatically cleaved by alkaline phosphatase (ALP), a yellow product is formed whose absorption overlaps the excitation spectrum of the β-CD-N/B-C-dots. Hence, fluorescence is reduced due to an inner filter effect. In additon, the β-CD cavity offers a pocket for substrate recognition. The findings were used to design a method for the determination of the activity of ALP. It has a working range that extends from 0.003 to 5.5 U·L-1, with a 0.3 mU·L-1 detection limit. The method is fast, simple, inexpensive, and highly sensitive and selective. Graphical abstract Schematic of an inner filter effect based probe for alkaline phosphatase based on the use boron and nitrogen co-doped carbon dots (N/B-C-dots) modified with β-cyclodextrin (β-CD). PNPP: p-Nitrophenylphosphate; PNP: p-Nitrophenol anion.
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Affiliation(s)
- Mi Mao
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, 430062, China
| | - Tian Tian
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, 430062, China
| | - Yu He
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, 430062, China. .,Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China. .,Hubei Province Key Laboratory of Regional Development and Environment Response, Wuhan, 430062, China.
| | - Yili Ge
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, 430062, China.,Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Jiangang Zhou
- Hubei Province Key Laboratory of Regional Development and Environment Response, Wuhan, 430062, China
| | - Gongwu Song
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Wuhan, 430062, China.,Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
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852
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853
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Varisco M, Zufferey D, Ruggi A, Zhang Y, Erni R, Mamula O. Synthesis of hydrophilic and hydrophobic carbon quantum dots from waste of wine fermentation. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170900. [PMID: 29308232 PMCID: PMC5749999 DOI: 10.1098/rsos.170900] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 11/16/2017] [Indexed: 05/06/2023]
Abstract
Wine lees are one of the main residues formed in vast quantities during the fermentation of wine. While toxic when applied to plants and wetlands, it is a biodegradable material, and several alternatives have been proposed for its valorization as: dietary supplement in animal feed, source for various yeast extracts and bioconversion feedstock. The implementation of stricter environment protection regulations resulted in increasing costs for wineries as their treatment process constitutes an unavoidable and expensive step in wine production. We propose here an alternative method to reduce waste and add value to wine production by exploiting this rich carbon source and use it as a raw material for producing carbon quantum dots (CQDs). A complete synthetic pathway is discussed, comprising the carbonization of the starting material, the screening of the most suitable solvent for the extraction of CQDs from the carbonized mass and their hydrophobic or hydrophilic functionalization. CQDs synthesized with the reported procedure show a bright blue emission (λmax = 433 ± 13 nm) when irradiated at 366 nm, which is strongly shifted when the wavelength is increased (e.g. emission at around 515 nm when excited at 460 nm). Yields and luminescent properties of CQDs, obtained with two different methods, namely microwave and ultrasound-based extraction, are discussed and compared. This study shows how easy a residue can be converted into an added-value material, thus not only reducing waste and saving costs for the wine-manufacturing industry but also providing a reliable, affordable and sustainable source for valuable materials.
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Affiliation(s)
- Massimo Varisco
- HES-SO – University of Applied Sciences Western Switzerland, Haute Ecole d'Ingénierie et d'Architecture de Fribourg, Institute of Chemical Technology, 1705 Fribourg, Switzerland
| | - Denis Zufferey
- HES-SO – University of Applied Sciences Western Switzerland, Haute Ecole d'Ingénierie et d'Architecture de Fribourg, Institute of Chemical Technology, 1705 Fribourg, Switzerland
| | - Albert Ruggi
- Department of Chemistry, UNIFR – University of Fribourg, 1700 Fribourg, Switzerland
| | - Yucheng Zhang
- EMPA – Swiss Federal Laboratories for Materials Science and Technology, Electron Microscopy Center, 8600 Dübendorf, Switzerland
| | - Rolf Erni
- EMPA – Swiss Federal Laboratories for Materials Science and Technology, Electron Microscopy Center, 8600 Dübendorf, Switzerland
| | - Olimpia Mamula
- HES-SO – University of Applied Sciences Western Switzerland, Haute Ecole d'Ingénierie et d'Architecture de Fribourg, Institute of Chemical Technology, 1705 Fribourg, Switzerland
- Author for correspondence: Olimpia Mamula e-mail:
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854
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Chu HW, Mao JY, Lien CW, Hsu PH, Li YJ, Lai JY, Chiu TC, Huang CC. Pulse laser-induced fragmentation of carbon quantum dots: a structural analysis. NANOSCALE 2017; 9:18359-18367. [PMID: 29143845 DOI: 10.1039/c7nr07639h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Carbon quantum dots (CQDs) have attracted enormous interest in recent years owing to their low cytotoxicity, excellent biocompatibility and strong fluorescence. They have been successfully employed in sensor, bio-imaging, and drug carrier applications. A complete understanding of their core-surface structure is essential for tuning their physical and chemical properties for various applications. Conventional characterizations of CQDs are conducted with electron microscopy or spectroscopy, such as transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. However, these techniques cannot fully resolve the core-surface structure of CQDs. In this study, we attempt to analyze the structures of CQDs by laser desorption/ionization mass spectrometry (LDI-MS) using three model CQDs synthesized from citric acid (CA-CQDs), diammonium citrate (AC-CQDs) and spermidine trihydrochloride (Spd-CQDs). Both CA-CQDs and AC-CQDs produced anionic carbon cluster ions ([Cn]-, n = 4-9) during the laser desorption/ionization process. Additionally, AC-CQDs produced fragments containing C, N, and O that appeared at m/z values of 41.999, 91.015, and 107.008, which were identified by 15N isotopes as [CNO]-, [CH3N2O3]-, and [CH3N2O4]-, respectively. By contrast, subjecting Spd-CQDs to the same analysis did not yield carbon cluster ions ([Cn]-); instead, strong chlorine-associated ions with a unique isotopic pattern were observed, strongly implying that Spd-CQDs contain chlorine. The lack of carbon cluster ion formation in nitrogen- and chlorine-doped Spd-CQDs indicates that nitrogen and chlorine are abundantly and homogenously doped in the CQDs. We also found a shot-dependent fragmentation behavior for AC-CQDs that produces nitrogen- and oxygen-containing ions and carbon cluster ions ([Cn]-) during initial fragmentation of the surface, with a gradual destruction of the nanocrystalline carbon core after additional shots. These results suggest that LDI-MS can be used as a tool for analyzing the core-surface structure of CQDs, particularly when it contains a heteroatom doped carbon core with various surface functional groups containing nitrogen, oxygen and halogens.
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Affiliation(s)
- Han-Wei Chu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan.
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855
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Wang Z, Xuan J, Zhao Z, Li Q, Geng F. Versatile Cutting Method for Producing Fluorescent Ultrasmall MXene Sheets. ACS NANO 2017; 11:11559-11565. [PMID: 29111669 DOI: 10.1021/acsnano.7b06476] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
As a recently created inorganic nanosheet material, MXene has received growing attention and has become a hotspot of intensive research. The efficient morphology control of this class of material could bring enormous possibilities for creating marvelous properties and functions; however, this type of research is very scarce. In this work, we demonstrate a general and mild approach for creating ultrasmall MXenes by simultaneous intralayer cutting and interlayer delamination. Taking the most commonly studied Ti3C2 as an illustrative example, the resulting product possessed monolayer thickness with a lateral dimension of 2-8 nm and exhibited bright and tunable fluorescence. Further, the method could also be employed to synthesize ultrasmall sheets of other MXene phases, for example, Nb2C or Ti2C. Importantly, although the strong covalent M-C bond was to some extent broken, all of the characterizations suggested that the chemical structure was composed of well-maintained host layers without observation of any serious damages, demonstrating the superior reaction efficiencies and safeties of our methods. This work may provide a facile and general approach to modulate various nanoscale materials and could further stimulate the vast applications of MXene materials in many optical-related fields.
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Affiliation(s)
- Zhiqiang Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , 199 Renai Road, Suzhou 215123, China
| | - Jinnan Xuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , 199 Renai Road, Suzhou 215123, China
| | - Zhigang Zhao
- Suzhou Institute of Nanotech and Nanobionics, Chinese Academy of Sciences , 398 Ruoshui Road, Suzhou Industry Park, Suzhou 215123, China
| | - Qingwen Li
- Suzhou Institute of Nanotech and Nanobionics, Chinese Academy of Sciences , 398 Ruoshui Road, Suzhou Industry Park, Suzhou 215123, China
| | - Fengxia Geng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , 199 Renai Road, Suzhou 215123, China
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856
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Feng H, Qian Z. Functional Carbon Quantum Dots: A Versatile Platform for Chemosensing and Biosensing. CHEM REC 2017; 18:491-505. [PMID: 29171708 DOI: 10.1002/tcr.201700055] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/14/2017] [Indexed: 12/17/2022]
Abstract
Carbon quantum dot has emerged as a new promising fluorescent nanomaterial due to its excellent optical properties, outstanding biocompatibility and accessible fabrication methods, and has shown huge application perspective in a variety of areas, especially in chemosensing and biosensing applications. In this personal account, we give a brief overview of carbon quantum dots from its origin and preparation methods, present some advance on fluorescence origin of carbon quantum dots, and focus on development of chemosensors and biosensors based on functional carbon quantum dots. Comprehensive advances on functional carbon quantum dots as a versatile platform for sensing from our group are included and summarized as well as some typical examples from the other groups. The biosensing applications of functional carbon quantum dots are highlighted from selective assays of enzyme activity to fluorescent identification of cancer cells and bacteria.
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Affiliation(s)
- Hui Feng
- Department of Chemistry, College of Life Science and Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua, Zhejiang Province, People's Republic of China
| | - Zhaosheng Qian
- Department of Chemistry, College of Life Science and Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua, Zhejiang Province, People's Republic of China
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857
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Kumawat MK, Thakur M, Gurung RB, Srivastava R. Graphene Quantum Dots for Cell Proliferation, Nucleus Imaging, and Photoluminescent Sensing Applications. Sci Rep 2017; 7:15858. [PMID: 29158566 PMCID: PMC5696518 DOI: 10.1038/s41598-017-16025-w] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 11/06/2017] [Indexed: 01/22/2023] Open
Abstract
We report a simple one-pot microwave assisted "green synthesis" of Graphene Quantum Dots (GQDs) using grape seed extract as a green therapeutic carbon source. These GQDs readily self-assemble, hereafter referred to as "self-assembled" GQDs (sGQDs) in the aqueous medium. The sGQDs enter via caveolae and clathrin-mediated endocytosis and target themselves into cell nucleus within 6-8 h without additional assistance of external capping/targeting agent. The tendency to self-localize themselves into cell nucleus also remains consistent in different cell lines such as L929, HT-1080, MIA PaCa-2, HeLa, and MG-63 cells, thereby serving as a nucleus labelling agent. Furthermore, the sGQDs are highly biocompatible and act as an enhancer in cell proliferation in mouse fibroblasts as confirmed by in vitro wound scratch assay and cell cycle analysis. Also, photoluminescence property of sGQDs (lifetime circa (ca.) 10 ns) was used for optical pH sensing application. The sGQDs show linear, cyclic and reversible trend in its fluorescence intensity between pH 3 and pH 10 (response time: ~1 min, sensitivity -49.96 ± 3.5 mV/pH) thereby serving as a good pH sensing agent. A simple, cost-effective, scalable and green synthetic approach based sGQDs can be used to develop selective organelle labelling, nucleus targeting in theranostics, and optical sensing probes.
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Affiliation(s)
- Mukesh Kumar Kumawat
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Mukeshchand Thakur
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Raju B Gurung
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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858
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Ciotta E, Paoloni S, Richetta M, Prosposito P, Tagliatesta P, Lorecchio C, Venditti I, Fratoddi I, Casciardi S, Pizzoferrato R. Sensitivity to Heavy-Metal Ions of Unfolded Fullerene Quantum Dots. SENSORS (BASEL, SWITZERLAND) 2017; 17:E2614. [PMID: 29135946 PMCID: PMC5713155 DOI: 10.3390/s17112614] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 10/31/2017] [Accepted: 11/12/2017] [Indexed: 02/07/2023]
Abstract
A novel type of graphene-like quantum dots, synthesized by oxidation and cage-opening of C60 buckminsterfullerene, has been studied as a fluorescent and absorptive probe for heavy-metal ions. The lattice structure of such unfolded fullerene quantum dots (UFQDs) is distinct from that of graphene since it includes both carbon hexagons and pentagons. The basic optical properties, however, are similar to those of regular graphene oxide quantum dots. On the other hand, UFQDs behave quite differently in the presence of heavy-metal ions, in that multiple sensitivity to Cu2+, Pb2+ and As(III) was observed through comparable quenching of the fluorescent emission and different variations of the transmittance spectrum. By dynamic light scattering measurements and transmission electron microscope (TEM) images we confirmed, for the first time in metal sensing, that this response is due to multiple complexation and subsequent aggregation of UFQDs. Nonetheless, the explanation of the distinct behaviour of transmittance in the presence of As(III) and the formation of precipitate with Pb2+ require further studies. These differences, however, also make it possible to discriminate between the three metal ions in view of the implementation of a selective multiple sensor.
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Affiliation(s)
- Erica Ciotta
- Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Stefano Paoloni
- Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Maria Richetta
- Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Paolo Prosposito
- Department of Industrial Engineering INSTM and CiMER, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Pietro Tagliatesta
- Department of Chemical Sciences and Technology, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Chiara Lorecchio
- Department of Chemical Sciences and Technology, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Iole Venditti
- Department of Chemistry, University of Rome Sapienza, 00187 Rome, Italy.
| | - Ilaria Fratoddi
- Department of Chemistry, University of Rome Sapienza, 00187 Rome, Italy.
| | - Stefano Casciardi
- National Institute for Insurance against Accidents at Work (INAIL), Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, 00078 Monte Porzio Catone, 00133 Rome, Italy.
| | - Roberto Pizzoferrato
- Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
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859
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Harroun SG, Lai JY, Huang CC, Tsai SK, Lin HJ. Reborn from the Ashes: Turning Organic Molecules to Antimicrobial Carbon Quantum Dots. ACS Infect Dis 2017; 3:777-779. [PMID: 28933816 DOI: 10.1021/acsinfecdis.7b00150] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Using polyamines as the initial organic raw material and by applying simple pyrolysis methods, super cationic carbon quantum dots (CQDs) can easily be made. Since polyamines are natural products and the synthesis procedure is green, these polyamine-derived CQDs display low toxicity and high biocompatibility but possess high antibacterial activity. In addition, polyamine-derived CQDs display other unique properties, such as facilitation of wound healing and passage through the tight junction, which make them a very promising bactericide in future clinical applications.
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Affiliation(s)
- Scott G. Harroun
- Department
of Chemistry, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal, Québec H3C 3J7, Canada
| | - Jui-Yang Lai
- Institute
of Biochemical and Biomedical Engineering, Chang Gung University, 259 Wenhua 1st Road, Taoyuan, 33302, Taiwan
- Department
of Ophthalmology, Chang Gung Memorial Hospital, 5 Fuxing Street, Taoyuan, 33305, Taiwan
- Department
of Materials Engineering, Ming Chi University of Technology, 84 Gungjuan
Road, New Taipei City, 24301, Taiwan
| | - Chih-Ching Huang
- Department
of Bioscience and Biotechnology, National Taiwan Ocean University, 2 Beining Road, Keelung, 20224, Taiwan
- Center
of Excellence for the Oceans, National Taiwan Ocean University, 2 Beining
Road, Keelung, 20224, Taiwan
- School of
Pharmacy, College of Pharmacy, Kaohsiung Medical University, 100
Shih-Chuan 1st Road, Kaohsiung, 80708, Taiwan
| | - Shou-Kuan Tsai
- Department
of Bioscience and Biotechnology, National Taiwan Ocean University, 2 Beining Road, Keelung, 20224, Taiwan
| | - Han-Jia Lin
- Department
of Bioscience and Biotechnology, National Taiwan Ocean University, 2 Beining Road, Keelung, 20224, Taiwan
- Center
of Excellence for the Oceans, National Taiwan Ocean University, 2 Beining
Road, Keelung, 20224, Taiwan
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860
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Zhu X, Zhang Z, Xue Z, Huang C, Shan Y, Liu C, Qin X, Yang W, Chen X, Wang T. Understanding the Selective Detection of Fe3+ Based on Graphene Quantum Dots as Fluorescent Probes: The Ksp of a Metal Hydroxide-Assisted Mechanism. Anal Chem 2017; 89:12054-12058. [DOI: 10.1021/acs.analchem.7b02499] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaowen Zhu
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhen Zhang
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenjie Xue
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuanhui Huang
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ye Shan
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cong Liu
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyun Qin
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wensheng Yang
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xu Chen
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Tie Wang
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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861
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A highly sensitive and selective fluorimetric probe for intracellular peroxynitrite based on photoinduced electron transfer from ferrocene to carbon dots. Biosens Bioelectron 2017; 97:150-156. [DOI: 10.1016/j.bios.2017.05.054] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/16/2017] [Accepted: 05/30/2017] [Indexed: 12/30/2022]
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862
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Luo C, Li Y, Guo L, Zhang F, Liu H, Zhang J, Zheng J, Zhang J, Guo S. Graphene Quantum Dots Downregulate Multiple Multidrug-Resistant Genes via Interacting with Their C-Rich Promoters. Adv Healthc Mater 2017; 6. [PMID: 28748603 DOI: 10.1002/adhm.201700328] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/15/2017] [Indexed: 01/04/2023]
Abstract
Multidrug resistance (MDR) is the major factor in the failure of many forms of chemotherapy, mostly due to the increased efflux of anticancer drugs that mediated by ATP-binding cassette (ABC) transporters. Therefore, inhibiting ABC transporters is one of effective methods of overcoming MDR. However, high enrichment of ABC transporters in cells and their broad substrate spectra made to circumvent MDR are almost insurmountable by a single specific ABC transporter inhibitor. Here, this study demonstrates that graphene quantum dots (GQDs) could downregulate the expressions of P-glycoprotein, multidrug resistance protein MRP1, and breast cancer resistance protein genes via interacting with C-rich regions of their promoters. This is the first example that a single reagent could suppress multiple MDR genes, suggesting that it will be possible to target multiple ABC transporters simultaneously with a single reagent. The inhibitory ability of the GQDs to these drug-resistant genes is validated further by reversing the doxorubicin resistance of MCF-7/ADR cells. Notably, GQDs have superb chemical and physical properties, unique structure, low toxicity, and high biocompatibility; hence, their capability of inhibiting multiple drug-resistant genes holds great potential in cancer therapy.
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Affiliation(s)
- Chao Luo
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Yanfang Li
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Lijuan Guo
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Fangwei Zhang
- School of Electronic Information and Electrical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Rd. Shanghai 200240 P. R. China
| | - Hui Liu
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Jiali Zhang
- School of Electronic Information and Electrical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Rd. Shanghai 200240 P. R. China
| | - Jing Zheng
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Jingyan Zhang
- State Key Laboratory of Bioreactor Engineering; Shanghai Key Laboratory of New Drug Design; School of Pharmacy; East China University of Science and Technology; 130 Meilong Rd. Shanghai 200237 P. R. China
| | - Shouwu Guo
- School of Electronic Information and Electrical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Rd. Shanghai 200240 P. R. China
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863
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Chen TH, Tseng WL. Self-Assembly of Monodisperse Carbon Dots into High-Brightness Nanoaggregates for Cellular Uptake Imaging and Iron(III) Sensing. Anal Chem 2017; 89:11348-11356. [DOI: 10.1021/acs.analchem.7b02193] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Tzu-Heng Chen
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung, 804, Taiwan
- Department
of Chemistry, National Taiwan University, Taipei City, 10617, Taiwan
| | - Wei-Lung Tseng
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung, 804, Taiwan
- School
of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung City, 807, Taiwan
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864
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Wu F, Su H, Wang K, Wong WK, Zhu X. Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells. Int J Nanomedicine 2017; 12:7375-7391. [PMID: 29066889 PMCID: PMC5644538 DOI: 10.2147/ijn.s147165] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
N-rich metal-free and metal-doped carbon quantum dots (CQDs) have been prepared through one-step hydrothermal method using tetraphenylporphyrin or its transition metal (Pd or Pt) complex as precursor. The structures and morphology of the as-prepared nanoparticles were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra. Three kinds of nanocomposites show similar structures except for the presence of metal ions in Pd-CQDs and Pt-CQDs indicated by X-ray photoelectron spectroscopy. All of them display bright blue emission upon exposure to ultraviolet irradiation. The CQDs exhibit typical excitation-dependent emission behavior, with the emission quantum yield of 10.1%, 17.8%, and 15.2% for CQDs, Pd-CQDs, and Pt-CQDs, respectively. Moreover, the CQDs, Pd-CQDs, and Pt-CQDs could serve as fluorescent probes for the specific and sensitive detection of Fe3+ ions in aqueous solution. The low cytotoxicity of CQDs is demonstrated by MTT assay against HeLa cells. Therefore, the CQDs can be used as efficient probes for cellular multicolor imaging and fluorescence sensors for the detection of Fe3+ ions due to their low toxicity, excellent biocompatibility, and low detection limits. This work provides a new route to synthesize highly luminescent N-rich metal-free or metal-doped CQDs for multifunctional applications.
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Affiliation(s)
- Fengshou Wu
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan
- Department of Chemistry and Institute of Advanced Materials, HKBU Institute of Research and Continuing Education (Shenzhen), Hong Kong Baptist University, Hong Kong
| | - Huifang Su
- Department of Medical Oncology, Sun Yet-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, People’s Republic of China
| | - Kai Wang
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan
| | - Wai-Kwok Wong
- Department of Chemistry and Institute of Advanced Materials, HKBU Institute of Research and Continuing Education (Shenzhen), Hong Kong Baptist University, Hong Kong
| | - Xunjin Zhu
- Department of Chemistry and Institute of Advanced Materials, HKBU Institute of Research and Continuing Education (Shenzhen), Hong Kong Baptist University, Hong Kong
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865
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Chen J, Zhang X, Zhang Y, Wang W, Li S, Wang Y, Hu M, Liu L, Bi H. Understanding the Capsanthin Tails in Regulating the Hydrophilic-Lipophilic Balance of Carbon Dots for a Rapid Crossing Cell Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10259-10270. [PMID: 28874049 DOI: 10.1021/acs.langmuir.7b01992] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here we use natural Chinese paprika to prepare a new kind of amphiphilic carbon dot (A-Dot) that exhibits bright, multicolored fluorescence and contains hydrophilic groups as well as lipophilic capsanthin tails on the surface. It is found that the capsanthin tails in a phospholipid-like structure can promote cell internalization of the A-Dots via crossing cell membranes rapidly in an energy-independent fashion. Compared to highly hydrophilic carbon dots (H-Dots), a control sample prepared from the microwave thermolysis of citric acid and ethylenediamine, our synthesized A-Dots can be taken up by CHO, HeLa, and HFF cells more easily. More importantly, we develop a method to calibrate the hydrophilic-lipophilic balance (HLB) values of various kinds of carbon dots (C-Dots). HLB values of A-Dots and H-Dots are determined to be 6.4 and 18.4, respectively. Moreover, we discover that the cellular uptake efficiency of C-Dots is closely related to their HLBs, and the C-Dots with an HLB value of around 6.4 cross the cell membrane easier and faster. As we regulate the HLB value of the A-Dots from 6.4 to 15.3 by removing the capsanthin tails from their surfaces via alkali refluxing, it is found that the refluxed A-Dots can hardly cross HeLa cell membranes. Our work is an essential step toward understanding the importance of regulating the HLB values as well as the surface polarity of the C-Dots for their practical use in bioimaging and also provides a simple but effective way to judge whether the C-Dots in hand are appropriate for cell imaging.
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Affiliation(s)
- Jing Chen
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
- School of Life Sciences, Hefei Normal University , Hefei 230601, China
| | - Xiang Zhang
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
| | - Ye Zhang
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
| | - Wei Wang
- School of Life Sciences, Hefei Normal University , Hefei 230601, China
| | - Shuya Li
- The Chinese Academy of Sciences Key Laboratory of Innate Immunity and Chronic Diseases, School of Life Sciences, University of Science and Technology of China , Hefei 230027, China
| | - Yucai Wang
- The Chinese Academy of Sciences Key Laboratory of Innate Immunity and Chronic Diseases, School of Life Sciences, University of Science and Technology of China , Hefei 230027, China
| | - Mengyue Hu
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
| | - Li Liu
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
| | - Hong Bi
- College of Chemistry and Chemical Engineering, Anhui University , Hefei 230601, China
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866
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Ran F, Lei W, Cui Y, Jiao J, Mao Y, Wang S, Wang S. Size effect on oral absorption in polymer-functionalized mesoporous carbon nanoparticles. J Colloid Interface Sci 2017; 511:57-66. [PMID: 28972896 DOI: 10.1016/j.jcis.2017.09.088] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 02/01/2023]
Abstract
In this manuscript, the effect of the particle size of polymer-functionalized mesoporous carbon (MPP) nanoparticles on enhancing oral absorption of a water-insoluble drug is first investigated. The insoluble drug, fenofibrate (Fen), was selected as the model drug loaded in the MPP nanoparticles. MPP nanoparticles with different particle sizes were designed for improving the oral bioavailability of drugs, in which the branched polyethyleneimine (PEI) and polyacrylic acid (PAA) were modified on the surfaces of mesoporous carbon nanoparticles (MCNs) with amide bonds. In addition, PEI-functionalized carbon quantum dots (PCA) and radioisotope 125I were applied to label the MPP nanoparticles to trace in the vivo process. According to the data, the MPP nanoparticles could markedly improve the dissolution rate and oral bioavailability of Fen. Interestingly, the MPP nanoparticle size had a notable effect on Fen oral absorption, and intermediate sized MPP nanoparticles were expected to be more ideal oral drug carriers. The nanoparticles were safe and easily excreted. These findings present the prospect of MPP nanoparticles for oral application, and guides the rational design of an oral delivery system with respect to particle size.
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Affiliation(s)
- Fu Ran
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Wei Lei
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Yu Cui
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Jian Jiao
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Yuling Mao
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Shengyu Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China
| | - Siling Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Wenhua Road, Shenyang 110016, PR China.
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867
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Bian W, Wang X, Wang Y, Yang H, Huang J, Cai Z, Choi MMF. Boron and nitrogen co-doped carbon dots as a sensitive fluorescent probe for the detection of curcumin. LUMINESCENCE 2017; 33:174-180. [DOI: 10.1002/bio.3390] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 07/25/2017] [Accepted: 08/01/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Wei Bian
- School of Basic Medical Science; Shanxi Medical University; Taiyuan People's Republic of China
| | - Xuan Wang
- College of Pharmacy; Shanxi Medical University; Taiyuan People's Republic of China
| | - Yakun Wang
- College of Pharmacy; Shanxi Medical University; Taiyuan People's Republic of China
| | - Haifen Yang
- College of Pharmacy; Shanxi Medical University; Taiyuan People's Republic of China
| | - Jialin Huang
- School of Basic Medical Science; Shanxi Medical University; Taiyuan People's Republic of China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis; Hong Kong Baptist University; Kowloon Tong Hong Kong SAR People's Republic of China
| | - Martin M. F. Choi
- Acadia Divinity College; Acadia University; Wolfville Nova Scotia Canada
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868
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Zhang T, Zhu J, Zhai Y, Wang H, Bai X, Dong B, Wang H, Song H. A novel mechanism for red emission carbon dots: hydrogen bond dominated molecular states emission. NANOSCALE 2017; 9:13042-13051. [PMID: 28836649 DOI: 10.1039/c7nr03570e] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Carbon dots (CDs) have emerged as novel fluorescent probes due to their remarkable optical properties; however, red emission is still rare, has a relatively low efficiency, and its mechanism remains ambiguous. Herein, relatively efficient red-emission CDs based on p-phenylenediamine were prepared through various solvothermal means, where the highest quantum yield approached 41.1% in n-amyl alcohol, which was the most efficient quantum yield reported to date. Various structural characterizations were performed and confirmed that the red emission originated from the molecular states consisting of a nitrogen-containing organic fluorophore. The CDs were dispersed in different organic solvents and showed tunable emission, evolving from green to orange-red in aprotic solvents and a red emission in protic solvents. Further solvent correlation studies indicated that the hydrogen bond effect between the CDs and solvents was the main mechanism leading to the spectral shift. Accordingly, solid-state luminescent CDs-polymers were fabricated, which also demonstrated continuously tunable emission properties. This work opens a new window for recognizing the generation of tunable and red-emission CDs.
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Affiliation(s)
- Tianxiang Zhang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
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869
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Wu M, Zhan J, Geng B, He P, Wu K, Wang L, Xu G, Li Z, Yin L, Pan D. Scalable synthesis of organic-soluble carbon quantum dots: superior optical properties in solvents, solids, and LEDs. NANOSCALE 2017; 9:13195-13202. [PMID: 28853478 DOI: 10.1039/c7nr04718e] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Carbon quantum dots (CQDs) have attracted much attention owing to their unique optical properties and a wide range of applications. The fabrication and control of CQDs with organic solubility and long-wavelength emission are still urgent issues to be addressed for their practical use in LEDs. Here, organic-soluble CQDs were produced at a high yield of ∼90% by a facile solvent engineering treatment of 1,3,6-trinitropyrene, which were simultaneously used as the nitrogen and carbon sources. The optical properties of the organic-soluble CQDs (o-CQDs) were investigated in nonpolar and polar solvents, films, and LED devices. The CQDs have a narrow size distribution around 2.66 nm, and can be dispersed in different organic solvents. Significantly, the as-prepared CQDs present an excitation-independent emission at 607 nm with fluorescence quantum yields (QYs) up to 65.93% in toluene solution. A pronounced solvent effect was observed and their strong absorption bands can be tuned in the whole visible region (400-750 nm) by changing the solvent. The CQDs in various solvents can emit bright, excitation-independent, long-wavelength fluorescence (orange to red). Furthermore, benefiting from the unique oil-solution properties, the as-prepared CQDs can be processed in thin film and device forms to meet the requirements of various applications, such as phosphor-based white-light LEDs. The color coordinate for these CQD modified LEDs is realized at (0.32, 0.31), which is close to pure white light (0.33, 0.33).
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Affiliation(s)
- Minghong Wu
- Shanghai Applied Radiation Institute, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
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870
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Zeng M, Shah SA, Huang D, Parviz D, Yu YH, Wang X, Green MJ, Cheng Z. Aqueous Exfoliation of Graphite into Graphene Assisted by Sulfonyl Graphene Quantum Dots for Photonic Crystal Applications. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30797-30804. [PMID: 28816428 DOI: 10.1021/acsami.7b06980] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigate the π-π stacking of polyaromatic hydrocarbons (PAHs) with graphene surfaces, showing that such interactions are general across a wide range of PAH sizes and species, including graphene quantum dots. We synthesized a series of graphene quantum dots with sulfonyl, amino, and carboxylic functional groups and employed them to exfoliate and disperse pristine graphene in water. We observed that sulfonyl-functionalized graphene quantum dots were able to stabilize the highest concentration of graphene in comparison to other functional groups; this is consistent with prior findings by pyrene. The graphene nanosheets prepared showed excellent colloidal stability, indicating great potential for applications in electronics, solar cells, and photonic displays which was demonstrated in this work.
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Affiliation(s)
- Minxiang Zeng
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Smit A Shah
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Dali Huang
- Department of Material Science & Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Dorsa Parviz
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Yi-Hsien Yu
- Department of Material Science & Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Xuezhen Wang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Micah J Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
- Department of Material Science & Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Zhengdong Cheng
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
- Department of Material Science & Engineering, Texas A&M University , College Station, Texas 77843, United States
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871
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New Insight into the Concept of Carbonization Degree in Synthesis of Carbon Dots to Achieve Facile Smartphone Based Sensing Platform. Sci Rep 2017; 7:11013. [PMID: 28887498 PMCID: PMC5591183 DOI: 10.1038/s41598-017-11572-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/24/2017] [Indexed: 11/08/2022] Open
Abstract
Direct pyrolysis of citric acid (CA) has been proved to be a facile bottom-up technique for making pristine carbon dots (CD) with homogenous size distribution. However, limited reports are available on systematic optimization of carbonization degree. In this investigation, pyrolysis temperatures between 160 °C and 220 °C were studied, based on CA thermal decomposition path, using various heating durations. The effect of the formation of more carbonized carbon particles (MCCPs), as the major byproduct of this method, on photoluminescence properties of CDs was also considered. The NaOH amount that neutralizes the solution and the effect of dilution on the emission intensity, were introduced as simple and accessible factors for monitoring carbonization degree, and an estimate of MCCP/CD ratio, respectively. The results show that the CDs fabricated at 160 °C, 50 minutes attain almost twice higher quantum yield (QY) of 29% than highest QY reported based on pyrolysis of CA. The so-prepared CDs can be employed as excellent candidates for turn-off sensing. As a proof of concept, detection limit of 50 nM for Hg2+ was achieved using a facile and inexpensive smartphone set-up that is able to quantify and compare fluorescent intensity in several samples simultaneously.
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872
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Low-Cost Nanocarbon-Based Peroxidases from Graphite and Carbon Fibers. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7090924] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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873
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Chung YJ, Kim K, Lee BI, Park CB. Carbon Nanodot-Sensitized Modulation of Alzheimer's β-Amyloid Self-Assembly, Disassembly, and Toxicity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700983. [PMID: 28714246 DOI: 10.1002/smll.201700983] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 06/02/2017] [Indexed: 05/28/2023]
Abstract
The self-assembly of amyloidogenic peptides into β-sheet-rich aggregates is a general feature of many neurodegenerative diseases, including Alzheimer's disease, which signifies the need for the effective attenuation of amyloid aggregation toward alleviating amyloid-associated neurotoxicity. This study reports that photoluminescent carbon nanodots (CDs) can effectively suppress Alzheimer's β-amyloid (Aβ) self-assembly and function as a β-sheet breaker disintegrating preformed Aβ aggregates. This study synthesizes CDs using ammonium citrate through one-pot hydrothermal treatment and passivates their surface with branched polyethylenimine (bPEI). The bPEI-coated CDs (bPEI@CDs) exhibit hydrophilic and cationic surface characteristics, which interact with the negatively charged residues of Aβ peptides, suppressing the aggregation of Aβ peptides. Under light illumination, bPEI@CDs display a more pronounced effect on Aβ aggregation and on the dissociation of β-sheet-rich assemblies through the generation of reactive oxygen species from photoactivated bPEI@CDs. The light-triggered attenuation effect of Aβ aggregation using a series of experiments, including photochemical and microscopic analysis, is verified. Furthermore, the cell viability test confirms the ability of photoactivated bPEI@CDs for the suppression of Aβ-mediated cytotoxicity, indicating bPEI@CDs' potency as an effective anti-Aβ neurotoxin agent.
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Affiliation(s)
- You Jung Chung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Kayoung Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Byung Il Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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874
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Huang Y, Xiao L, An T, Lim W, Wong T, Sun H. Fast Dynamic Visualizations in Microfluidics Enabled by Fluorescent Carbon Nanodots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700869. [PMID: 28696529 DOI: 10.1002/smll.201700869] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/02/2017] [Indexed: 06/07/2023]
Abstract
Microfluidic systems have become a superior platform for explorations of fascinating fluidic physics at microscale as well as applications in biomedical devices, chemical reactions, drug delivery, etc. Exploitations of this platform are built upon the fundamental techniques of flow visualizations. However, the currently employed fluorescent materials for microfluidic visualization are far from satisfaction, which severely hinders their widespread applications. Here fluorescent carbon nanodots are documented as a game-changer, applicable in versatile fluidic environment for the visualization in microfluidics with unprecedented advantages. One of the fastest fluorescent imaging speeds up to 2500 frames per second under a normal contionous wave (CW) laser line is achieved by adopting carbon nanodots in microfluidics. Besides better visualizations of the fluid or interface, fluorescent carbon nanodots-based microparticles enable quantitative studies of high speed dynamics in fluids at microscale with a more than 90% lower cost, which is inaccessible by traditionally adopted fluorescent dye based seeding particles. The findings hold profound influences to microfluidic investigations and may even lead to revolutionary changes to the relevant industries.
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Affiliation(s)
- Yi Huang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Lian Xiao
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Tingting An
- College of Life Sciences, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Wenxiang Lim
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Teckneng Wong
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Handong Sun
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
- Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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875
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Teradal NL, Jelinek R. Carbon Nanomaterials in Biological Studies and Biomedicine. Adv Healthc Mater 2017; 6. [PMID: 28777502 DOI: 10.1002/adhm.201700574] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/12/2017] [Indexed: 12/31/2022]
Abstract
The "carbon nano-world" has made over the past few decades huge contributions in diverse scientific disciplines and technological advances. While dramatic advances have been widely publicized in using carbon nanomaterials such as fullerenes, carbon nanotubes, and graphene in materials sciences, nano-electronics, and photonics, their contributions to biology and biomedicine have been noteworthy as well. This Review focuses on the use of carbon nanotubes (CNTs), graphene, and carbon quantum dots [encompassing graphene quantum dots (GQDs) and carbon dots (C-dots)] in biologically oriented materials and applications. Examples of these remarkable nanomaterials in bio-sensing, cell- and tissue-imaging, regenerative medicine, and other applications are presented and discussed, emphasizing the significance of their unique properties and their future potential.
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Affiliation(s)
- Nagappa L. Teradal
- Department of Chemistry and Ilse Katz Institute for Nanotechnology; Ben Gurion University of the Negev; Beer Sheva 84105 Israel
| | - Raz Jelinek
- Department of Chemistry and Ilse Katz Institute for Nanotechnology; Ben Gurion University of the Negev; Beer Sheva 84105 Israel
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876
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Zhen X, Tao Y, An Z, Chen P, Xu C, Chen R, Huang W, Pu K. Ultralong Phosphorescence of Water-Soluble Organic Nanoparticles for In Vivo Afterglow Imaging. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28657119 DOI: 10.1002/adma.201606665] [Citation(s) in RCA: 226] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/06/2017] [Indexed: 05/05/2023]
Abstract
Afterglow or persistent luminescence eliminates the need for light excitation and thus circumvents the issue of autofluorescence, holding promise for molecular imaging. However, current persistent luminescence agents are rare and limited to inorganic nanoparticles. This study reports the design principle, synthesis, and proof-of-concept application of organic semiconducting nanoparticles (OSNs) with ultralong phosphorescence for in vivo afterglow imaging. The design principle leverages the formation of aggregates through a top-down nanoparticle formulation to greatly stabilize the triplet excited states of a phosphorescent molecule. This prolongs the particle luminesce to the timescale that can be detected by the commercial whole-animal imaging system after removal of external light source. Such ultralong phosphorescent of OSNs is inert to oxygen and can be repeatedly activated, permitting imaging of lymph nodes in living mice with a high signal-to-noise ratio. This study not only introduces the first category of water-soluble ultralong phosphorescence organic nanoparticles but also reveals a universal design principle to prolong the lifetime of phosphorescent molecules to the level that can be effective for molecular imaging.
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Affiliation(s)
- Xu Zhen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Ye Tao
- Key Laboratory for Organic Electronics and Information Displays (KLOEI) and Institute of Advanced Materials (IAM), Synergistic Innovation Center for Organic Electronic and Information Displays (SICOEID), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 211816, China
| | - Peng Chen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Runfeng Chen
- Key Laboratory for Organic Electronics and Information Displays (KLOEI) and Institute of Advanced Materials (IAM), Synergistic Innovation Center for Organic Electronic and Information Displays (SICOEID), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 211816, China
| | - Kanyi Pu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
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877
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Gobi N, Vijayakumar D, Keles O, Erogbogbo F. Infusion of Graphene Quantum Dots to Create Stronger, Tougher, and Brighter Polymer Composites. ACS OMEGA 2017; 2:4356-4362. [PMID: 31457728 PMCID: PMC6641722 DOI: 10.1021/acsomega.6b00517] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 03/06/2017] [Indexed: 05/31/2023]
Abstract
Incorporation of nanoparticles into polymer resins has recently attracted a significant amount of attention from researchers for the nanoparticles' ability to alter the properties of the resin. Whereas graphene-based structures possess a two-dimensional honeycomb arrangement of carbon atoms that makes them desirable for engineering composite materials, quantum dot formulations have been primarily used in optoelectronic applications that take advantage of quantum confinement and size-tunable properties. Graphene and quantum dots (GQDs) are ubiquitous in the current research literature; however, the impact of GQD on the physical properties of polymer resins like epoxy remains unclear. Here, we show that infusing GQD into an epoxy polymer matrix results in (1) a 2.6-fold increase in the toughness of the polymer resins, (2) a 2.25-fold increase in the tensile strength of the polymer resins compared to its original tensile strength, (3) uniform loading at weight percentages as high as 10% of the polymer resin, (4) an 18% change to the max % increase in tensile strain compared to that of the neat polymer resin without GQDs, even though there is an increase in tensile strength, and (5) a 2.5-times increase in Young's modulus compared to that of the neat polymer resin, all while maintaining excellent optical properties of the composite formulation. Our results demonstrate that GQDs with dual acid and alcohol functional groups can enable high loading percentages, which, in turn, give rise to composite materials that are simultaneously stronger and tougher. We believe that these GQDs, created from an abundant source, are a starting point for new and more sophisticated composite materials with potential in mechanical, electrical, and photosensitive applications.
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878
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So RC, Sanggo JE, Jin L, Diaz JMA, Guerrero RA, He J. Gram-Scale Synthesis and Kinetic Study of Bright Carbon Dots from Citric Acid and Citrus japonica via a Microwave-Assisted Method. ACS OMEGA 2017; 2:5196-5208. [PMID: 30023742 PMCID: PMC6044860 DOI: 10.1021/acsomega.7b00551] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/16/2017] [Indexed: 05/03/2023]
Abstract
Tracking dynamic cellular processes necessitates fluorescent materials that are photostable, biocompatible, water-soluble, nanosized, and nontoxic. In this study, highly fluorescent carbon dots (CDs) were produced from cheap and readily available sources, citric acid (CA) and Philippine citrus (Citrus japonica Thunb.) or calamansi juice (CJ) via a microwave-assisted method. A number of synthetic conditions were investigated systematically to optimize the preparation of CDs from CA and CJ. The formation mechanism, surface chemistry, and photoluminescence of CA-based CDs (CA-CDs) and CJ-based CDs (CJ-CDs) were evaluated after each stage of pyrolysis in detail using different characterization techniques, such as dynamic light scattering, diffusion-ordered spectroscopy, atomic force microscopy, ζ potential, X-ray diffraction, Fourier transform infrared spectroscopy, 1H and 13C nuclear magnetic resonance spectroscopy, and absorption/emission spectroscopy. Gram-scale pyrolysis of CA with ethylenediamine (EDA) and CJ with EDA were carried out to provide CA-CDs (CA-18) within 18 min total pyrolysis time at 97% yield and CJ-CDs (CJ-14) within 14 min total pyrolysis time at 7% yield. Aqueous suspensions of CA-18 and CJ-14 CDs gave comparable bright blue luminescence at 462 nm. CA-CDs were shown to be nontoxic for mung beans up to 2 mg/mL, whereas CJ-CDs with higher surface negative charges inhibited growth above 0.5 mg/mL. This study demonstrates that bright CA- and CJ-CDs can be produced in gram-scale quantities using inexpensive methods. The size, amount, and extent of EDA incorporation are important in contributing to the formation of highly emissive particles.
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Affiliation(s)
- Regina C. So
- Department
of Chemistry, Ateneo de Manila University, Schmitt Hall, Katipunan Avenue, Loyola Heights, Quezon City 1108, Philippines
| | - Jemimah E. Sanggo
- Department
of Chemistry, Ateneo de Manila University, Schmitt Hall, Katipunan Avenue, Loyola Heights, Quezon City 1108, Philippines
| | - Lei Jin
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jose Mario A. Diaz
- Department
of Chemistry, Ateneo de Manila University, Schmitt Hall, Katipunan Avenue, Loyola Heights, Quezon City 1108, Philippines
| | - Raphael A. Guerrero
- Department
of Physics, Ateneo de Manila University, Faura Hall, Katipunan Avenue, Loyola Heights, Quezon City 1108, Philippines
| | - Jie He
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
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879
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Chen Y, Yang Q, Xu P, Sun L, Sun D, Zhuo K. One-Step Synthesis of Acidophilic Highly-Photoluminescent Carbon Dots Modified by Ionic Liquid from Polyethylene Glycol. ACS OMEGA 2017; 2:5251-5259. [PMID: 31457796 PMCID: PMC6641901 DOI: 10.1021/acsomega.7b01014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/21/2017] [Indexed: 05/30/2023]
Abstract
Acidophilic highly-photoluminescent ionic liquid (IL)-modified carbon dots (CDs) were fabricated directly from polyethylene glycol-2000 (PEG2000N) by a simple one-step hydrothermal method in a system containing an IL (1-butyl-3-methylimidazolium bromide [C4mim]Br) and hydrochloric acid (HCl). In this process, PEG2000N works as the carbon source, [C4mim]Br as the modifier, and HCl as the accelerator. CDs with low photoluminescence (PL) intensity and quantum yields (QYs) were generated in the system without H+, but CDs with high PL intensity and QYs could be prepared after H+ was introduced. Moreover, with the increase of H+ concentration, the QYs of the prepared CDs increase subsequently, and the highest QY reaches up to 43%. The formation mechanism was explored, and the results showed that H+ changes the surface groups of the CDs generated without H+ into those that exist on the CDs generated with H+, which further improves the PL performance of the CDs. Different from most CDs reported in the literature, the as-prepared CDs can still exhibit high PL intensity even under strong acidic condition.
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Affiliation(s)
- Yujuan Chen
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
| | - Qian Yang
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
| | - Panpan Xu
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
| | - Li Sun
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
| | - Dong Sun
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of
Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, P. R. China
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880
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Wang H, Xie Y, Liu S, Cong S, Song Y, Xu X, Tan M. Presence of Fluorescent Carbon Nanoparticles in Baked Lamb: Their Properties and Potential Application for Sensors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7553-7559. [PMID: 28783334 DOI: 10.1021/acs.jafc.7b02913] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The presence of nanoparticles in food has drawn much attention in recent years. Fluorescent carbon nanoparticles are a new class of nanostructures; however, the distribution and physicochemical properties of such nanoparticles in food remain unclear. Herein, the presence of fluorescent carbon nanoparticles in baked lamb was confirmed, and their physicochemical properties were investigated. The fluorescent carbon nanoparticles from baked lamb emit strong blue fluorescence under ultraviolet light with a 10% fluorescent quantum yield. The nanoparticles are roughly spherical in appearance with a diameter of around 2.0 nm. Hydroxyl, amino, and carboxyl groups exist on the surface of nanoparticles. In addition, the nanoparticles could serve as a fluorescence sensor for glucose detection through an oxidation-reduction reaction. This work is the first report on fluorescent carbon nanoparticles present in baked lamb, which provides valuable insight into the physicochemical properties of such nanoparticles and their potential application in sensors.
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Affiliation(s)
- Haitao Wang
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Yisha Xie
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Shan Liu
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Shuang Cong
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Yukun Song
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Xianbing Xu
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
| | - Mingqian Tan
- School of Food Science and Technology, Dalian Polytechnic University , Dalian, Liaoning 116034, People's Republic of China
- National Engineering Research Center of Seafood , Dalian, Liaoning 116034, People's Republic of China
- Engineering Research Center of Seafood of Ministry of Education of China , Dalian, Liaoning 116034, People's Republic of China
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881
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Kumar VB, Sahu AK, Mohsin ASM, Li X, Gedanken A. Refractive-Index Tuning of Highly Fluorescent Carbon Dots. ACS APPLIED MATERIALS & INTERFACES 2017; 9:28930-28938. [PMID: 28796480 DOI: 10.1021/acsami.7b08985] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this manuscript, we report the refractive-index (RI) modulation of various concentrations of nitrogen-doped carbon dots (N@C-dots) embedded in poly(vinyl alcohol) (PVA) polymer. The dispersion and size distribution of N@C-dots embedded within PVA have been investigated using electron microscopy. The RI of PVA-N@C-dots can be enhanced by increasing the doping concentration of highly fluorescent C-dots (quantum yield 44%). This is demonstrated using ultraviolet-visible (UV-visible), photoluminscence, Raman, and Fourier transform infrared (FTIR) spectroscopy measurements. The Mie scattering of light on N@C-dots was applied for developing the relationship between RI tuning and absorption cross section of N@C-dots. The extinction cross section of N@C-dot thin films can be rapidly enhanced by either tuning the RI or increasing the concentration of N@C-dots. The developed method can be used as effective RI contrast for various applications such as holography creation and bioimaging.
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Affiliation(s)
- Vijay Bhooshan Kumar
- Department of Chemistry, Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Amit Kumar Sahu
- Centre for Micro-Photonics, Swinburne University of Technology , John Street, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Abu S M Mohsin
- Centre for Micro-Photonics, Swinburne University of Technology , John Street, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Xiangping Li
- Centre for Micro-Photonics, Swinburne University of Technology , John Street, P.O. Box 218, Hawthorn, Victoria 3122, Australia
- Institute of Photonics Technology, Jinan University , Guangzhou 510632, China
| | - Aharon Gedanken
- Department of Chemistry, Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat-Gan 5290002, Israel
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882
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Fang BY, Li C, Song YY, Tan F, Cao YC, Zhao YD. Nitrogen-doped graphene quantum dot for direct fluorescence detection of Al 3+ in aqueous media and living cells. Biosens Bioelectron 2017; 100:41-48. [PMID: 28858680 DOI: 10.1016/j.bios.2017.08.057] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/23/2017] [Accepted: 08/25/2017] [Indexed: 01/23/2023]
Abstract
Graphene quantum dot (GQD) has been attractive in analytical science field due to its low toxicity, stable photoluminescence. Herein, nitrogen-doped GQD (N-GQD) was prepared by a facile solvothermal treatment of GO using dimethylformamide, and exhibited a green emission with 23.1% quantum yield. The N-GQD probe showed a selective and sensitive fluorescence enhancement response to Al3+, the mechanism might be the formation of a complex between Al3+ and N-GQD constrained the photo-induced electron transfer (PET) process of N-GQD itself. With Benesi-Hildebrand equation, the binding constant and molar ratio between N-GQD and Al3+ was calculated to be 4.6 × 104Lmol-1 and 1:1 respectively. The pKa value of N-GQD was also determined to be 4.4 by capillary electrophoresis. In pH 4.0 PBS solution, there was a good linear relation between the fluorescence intensity and the logarithm of concentration of Al3+ in the range of 2.5-75μmolL-1, the limit of detection (3σ) was 1.3μmolL-1. This "Off - On" fluorescence method had been applied to accurate quantification of aluminum in hydrotalcite tablets. What's more, the fluorescence switch property of N-GQD was explored by alternate addition of Al3+ and EDTA. The probe was also utilized for detection Al3+ in living cells due to its excellent biocompatibility.
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Affiliation(s)
- Bi-Yun Fang
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics - Hubei Bioinformatics & Molecular Imaging Key Laboratory, Key Laboratory of Biomedical Photonics (HUST, Ministry of Education), Collaborative Innovation Center for Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Cheng Li
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics - Hubei Bioinformatics & Molecular Imaging Key Laboratory, Key Laboratory of Biomedical Photonics (HUST, Ministry of Education), Collaborative Innovation Center for Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Yuan-Yang Song
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics - Hubei Bioinformatics & Molecular Imaging Key Laboratory, Key Laboratory of Biomedical Photonics (HUST, Ministry of Education), Collaborative Innovation Center for Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Fang Tan
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University, Wuhan 430056, PR China
| | - Yuan-Cheng Cao
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University, Wuhan 430056, PR China
| | - Yuan-Di Zhao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics - Hubei Bioinformatics & Molecular Imaging Key Laboratory, Key Laboratory of Biomedical Photonics (HUST, Ministry of Education), Collaborative Innovation Center for Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
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883
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Paper and Fiber-Based Bio-Diagnostic Platforms: Current Challenges and Future Needs. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7080863] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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884
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Lu X, Zhang Z, Xia Q, Hou M, Yan C, Chen Z, Xu Y, Liu R. Glucose functionalized carbon quantum dot containing organic radical for optical/MR dual-modality bioimaging. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 82:190-196. [PMID: 29025647 DOI: 10.1016/j.msec.2017.08.074] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/16/2017] [Accepted: 08/16/2017] [Indexed: 12/18/2022]
Abstract
The organic paramagnetic compounds nitroxides have great potential as magnetic resonance imaging (MRI) contrast agents. Herein, we report the synthesis and characterization of glucose modified carbon quantum dot containing 2,2,6,6-tetramethyl-piperidinooxy (TEMPO) for targeted bimodal MR/optical imaging of tumor cells. CQD-TEMPO-Glu shows the greatest potentials for bioimaging applications in view of low cytotoxicity, good biocompatibility, green fluorescence emission and high T1 relaxivities. The in vitro MR and optical imaging results confirm enhanced cellular internalization of CQD-TEMPO-Glu in cancer cells through GLUT mediated endocytosis. These results confirm that CQD-TEMPO-Glu is expected to be widely exploited as dual-modal contrast for cancer imaging.
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Affiliation(s)
- Xiaodan Lu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Zhide Zhang
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, PR China
| | - Qi Xia
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Meirong Hou
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Chenggong Yan
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Zelong Chen
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Yikai Xu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China.
| | - Ruiyuan Liu
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, PR China; School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China.
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885
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Lu W, Gao Y, Jiao Y, Shuang S, Li C, Dong C. Carbon nano-dots as a fluorescent and colorimetric dual-readout probe for the detection of arginine and Cu 2+ and its logic gate operation. NANOSCALE 2017; 9:11545-11552. [PMID: 28770932 DOI: 10.1039/c7nr02336g] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A new visual fluorescent probe based on carbon nano-dots (CNDs) has been facilely synthesized via one step microwave-assisted pyrolysis and utilized for sequential detection of arginine (Arg) and Cu2+ by fluorescent and colorimetric dual-readout assay. The fluorescence of CNDs can be effectively quenched by Arg, and recovered upon addition of Cu2+ due to the competitive binding of Arg and Cu2+ that leads Arg to escape from the surface of CNDs. The probe displayed high sensitivity and selectivity toward Arg and Cu2+ over other analytes with a low detection limit of 0.26 μM and 0.17 μM, respectively. Meanwhile, the CNDs can also give dual responsive signals of a visible color change (yellow-pink-light yellow). According to this phenomenon, an "AND" logic gate based on the novel CNDs has been constructed. More importantly, the probe was also extended to cellular imaging. The proposed method was simple with ease of operation, which demonstrated great potential in bio-sensing, disease diagnosis or environmental monitoring.
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Affiliation(s)
- Wenjing Lu
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
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886
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Kumar VB, Perkas N, Porat Z, Gedanken A. Solar-Light-Driven Photocatalytic Activity of Novel Sn@C-Dots-Modified TiO2
Catalyst. ChemistrySelect 2017. [DOI: 10.1002/slct.201701375] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Vijay Bhooshan Kumar
- Institute for Nanotechnology and Advanced Materials; Department of Chemistry, Bar-Ilan University; Ramat Gan 5290002 Israel
| | - Nina Perkas
- Institute for Nanotechnology and Advanced Materials; Department of Chemistry, Bar-Ilan University; Ramat Gan 5290002 Israel
| | - Ze'ev Porat
- Division of Chemistry; Nuclear Research Center-Negev; P.O. Box 9001 Beer-Sheva 84190 Israel
- Institute of Applied Research; Ben-Gurion University of the Negev; Beer-Sheva 8410501 Israel
| | - Aharon Gedanken
- Institute for Nanotechnology and Advanced Materials; Department of Chemistry, Bar-Ilan University; Ramat Gan 5290002 Israel
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887
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Mandani S, Majee P, Sharma B, Sarma D, Thakur N, Nayak D, Sarma TK. Carbon Dots as Nanodispersants for Multiwalled Carbon Nanotubes: Reduced Cytotoxicity and Metal Nanoparticle Functionalization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7622-7632. [PMID: 28696709 DOI: 10.1021/acs.langmuir.7b00557] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The colloidal stabilization of multiwalled carbon nanotubes (MWCNTs) in an aqueous medium through noncovalent interactions has potential benefits toward the practical use of this one-dimensional carbonaceous material for biomedical applications. Here, we report that fluorescent carbon nanodots can efficiently function as dispersing agents in the preparation of stable aqueous suspensions of CNTs at significant concentrations (0.5 mg/mL). The amphiphilic nature of carbon dots with a hydrophobic graphitic core could effectively interact with the CNT surface, whereas hydrophilic oxygenated functionalization on the C-dot surface provided excellent water dispersibility. The resultant CNT-C-dot composite showed significantly reduced cytotoxicity compared to that of unmodified or protein-coated CNTs, as demonstrated by cell viability and proliferation assays. Furthermore, the reducing capability of C-dots could be envisaged toward the formation of a catalytically active metal nanoparticle-CNT-C-dot composite without the addition of any external reducing or stabilizing agents that showed excellent catalytic activity toward the reduction of p-nitrophenol in the presence of NaBH4. Overall, the present work establishes C-dots as an efficient stabilizer for aqueous dispersions of CNTs, leading to an all-carbon nanocomposite that can be useful for different practical applications.
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Affiliation(s)
| | | | - Bhagwati Sharma
- Institute of Nano Science and Technology , Phase X, Sector-64, Mohali 160062, India
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888
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Liu J, Tang D, Chen Z, Yan X, Zhong Z, Kang L, Yao J. Chemical redox modulated fluorescence of nitrogen-doped graphene quantum dots for probing the activity of alkaline phosphatase. Biosens Bioelectron 2017; 94:271-277. [DOI: 10.1016/j.bios.2017.03.017] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/24/2017] [Accepted: 03/07/2017] [Indexed: 01/07/2023]
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889
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Li BL, Setyawati MI, Zou HL, Dong JX, Luo HQ, Li NB, Leong DT. Emerging 0D Transition-Metal Dichalcogenides for Sensors, Biomedicine, and Clean Energy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28605120 DOI: 10.1002/smll.201700527] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/01/2017] [Indexed: 05/11/2023]
Abstract
Following research on two-dimensional (2D) transition metal dichalcogenides (TMDs), zero-dimensional (0D) TMDs nanostructures have also garnered some attention due to their unique properties; exploitable for new applications. The 0D TMDs nanostructures stand distinct from their larger 2D TMDs cousins in terms of their general structure and properties. 0D TMDs possess higher bandgaps, ultra-small sizes, high surface-to-volume ratios with more active edge sites per unit mass. So far, reported 0D TMDs can be mainly classified as quantum dots, nanodots, nanoparticles, and small nanoflakes. All exhibited diverse applications in various fields due to their unique and excellent properties. Of significance, through exploiting inherent characteristics of 0D TMDs materials, enhanced catalytic, biomedical, and photoluminescence applications can be realized through this exciting sub-class of TMDs. Herein, we comprehensively review the properties and synthesis methods of 0D TMDs nanostructures and focus on their potential applications in sensor, biomedicine, and energy fields. This article aims to educate potential adopters of these excitingly new nanomaterials as well as to inspire and promote the development of more impactful applications. Especially in this rapidly evolving field, this review may be a good resource of critical insights and in-depth comparisons between the 0D and 2D TMDs.
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Affiliation(s)
- Bang Lin Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
| | - Magdiel Inggrid Setyawati
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
| | - Hao Lin Zou
- Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Jiang Xue Dong
- Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Hong Qun Luo
- Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Nian Bing Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - David Tai Leong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
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890
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Jian HJ, Wu RS, Lin TY, Li YJ, Lin HJ, Harroun SG, Lai JY, Huang CC. Super-Cationic Carbon Quantum Dots Synthesized from Spermidine as an Eye Drop Formulation for Topical Treatment of Bacterial Keratitis. ACS NANO 2017; 11:6703-6716. [PMID: 28677399 DOI: 10.1021/acsnano.7b01023] [Citation(s) in RCA: 244] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We have developed a one-step method to synthesize carbon quantum dots (CQDPAs) from biogenic polyamines (PAs) as an antibacterial agent for topical treatment of bacterial keratitis (BK). CQDs synthesized by direct pyrolysis of spermidine (Spd) powder through a simple dry heating treatment exhibit a solubility and yield much higher than those from putrescine and spermine. We demonstrate that CQDs obtained from Spds (CQDSpds) possess effective antibacterial activities against non-multidrug-resistant Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Salmonella enterica serovar Enteritidis bacteria and also against the multidrug-resistant bacteria, methicillin-resistant S. aureus. The minimal inhibitory concentration (MIC) of CQDSpds is ∼2500-fold lower than that of spermidine alone, demonstrating their strong antibacterial capabilities. Investigation of the possible mechanisms behind the antibacterial activities of the as-synthesized CQDSpds indicates that the super-cationic CQDSpds with small size (diameter ca. 6 nm) and highly positive charge (ζ-potential ca. +45 mV) cause severe disruption of the bacterial membrane. In vitro cytotoxicity, hemolysis, hemagglutination, genotoxicity, and oxidative stress and in vivo morphologic and physiologic cornea change evaluations show the good biocompatibility of CQDSpds. Furthermore, topical ocular administration of CQDSpds can induce the opening of the tight junction of corneal epithelial cells, thereby leading to great antibacterial treatment of S. aureus-induced BK in rabbits. Our results suggest that CQDSpds are a promising antibacterial candidate for clinical applications in treating eye-related bacterial infections and even persistent bacteria-induced infections.
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Affiliation(s)
- Hong-Jyuan Jian
- Institute of Biochemical and Biomedical Engineering, Chang Gung University , Taoyuan 33302, Taiwan
| | - Ren-Siang Wu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University , Keelung 20224, Taiwan
| | - Tzu-Yu Lin
- Institute of Biochemical and Biomedical Engineering, Chang Gung University , Taoyuan 33302, Taiwan
| | - Yu-Jia Li
- Institute of Biochemical and Biomedical Engineering, Chang Gung University , Taoyuan 33302, Taiwan
| | - Han-Jia Lin
- Department of Bioscience and Biotechnology, National Taiwan Ocean University , Keelung 20224, Taiwan
| | - Scott G Harroun
- Department of Chemistry, Université de Montréal , Montréal, Québec H3C 3J7, Canada
| | - Jui-Yang Lai
- Institute of Biochemical and Biomedical Engineering, Chang Gung University , Taoyuan 33302, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital , Taoyuan 33305, Taiwan
- Department of Materials Engineering, Ming Chi University of Technology , New Taipei City 24301, Taiwan
| | - Chih-Ching Huang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University , Keelung 20224, Taiwan
- Center of Excellence for the Oceans, National Taiwan Ocean University , Keelung 20224, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University , Kaohsiung 80708, Taiwan
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891
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Hu Y, Geng X, Zhang L, Huang Z, Ge J, Li Z. Nitrogen-doped Carbon Dots Mediated Fluorescent on-off Assay for Rapid and Highly Sensitive Pyrophosphate and Alkaline Phosphatase Detection. Sci Rep 2017; 7:5849. [PMID: 28724997 PMCID: PMC5517519 DOI: 10.1038/s41598-017-06356-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 06/09/2017] [Indexed: 01/06/2023] Open
Abstract
In this report, a novel fluorescent sensing platform using nitrogen-doped carbon dots (N-CDs) as probes for fluorescence signal transmission has been designed for the detection of significant biomolecules pyrophosphate (PPi) and alkaline phosphatase (ALP). The high fluorescent N-CDs could be selectively quenched by Cu2+, and recovered by the addition of PPi because PPi preferentially binds to Cu2+. Once ALP was introduced into the system, ALP can specifically hydrolyze PPi into Pi, the intense fluorescence of N-CDs could be quenched again due to the recombination of the as-released Cu2+ with N-CDs. So, fluorescence of N-CDs is regulated by an ALP-triggered reaction. Based on this strategy, we demonstrated that N-CDs could serve as a very effective fluorescent sensing platform for label-free, sensitive and selective detection of PPi and ALP with low detection limit of 0.16 μM and 0.4 U/L for PPi and ALP, respectively. Moreover, the assay time is just around 0.5 min for PPi and 30 min for ALP. This developed strategy shows remarkable advantages including sensitive, rapid, simple, convenient, and low-cost and so forth. Furthermore, this method was also successfully applied to monitor ALP in human serum, which indicates its great potential for practical applications in biological and clinical diagnosis.
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Affiliation(s)
- Yalei Hu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Xin Geng
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Lin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Zhongming Huang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Jia Ge
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China.
| | - Zhaohui Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China.
- Institute of Chemical Biology and Nanomedicine, Hunan University, Changsha, 410082, P.R. China.
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892
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Li RS, Gao PF, Zhang HZ, Zheng LL, Li CM, Wang J, Li YF, Liu F, Li N, Huang CZ. Chiral nanoprobes for targeting and long-term imaging of the Golgi apparatus. Chem Sci 2017; 8:6829-6835. [PMID: 29147508 PMCID: PMC5643954 DOI: 10.1039/c7sc01316g] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/27/2017] [Indexed: 01/13/2023] Open
Abstract
The targeting and long-term imaging of the Golgi apparatus have been realized vial-cysteine functionalized nanoprobes.
The Golgi apparatus is an essential subcellular organelle. Targeting and monitoring the Golgi change at the single-cell level over a long time scale are critical but are challenges that have not yet been tackled. Inspired by the precise Golgi positioning ability of galactosyltransferase and protein kinase D, due to their cysteine residues, we developed a method for long-term Golgi imaging. Fluorescent molecules, carbon quantum dots (CQDs) and silica nanoparticles could target the Golgi when they are modified with l-cysteine. l-Cysteine-rich chiral carbon quantum dots (LC-CQDs), which have the benefits of a high Golgi specificity from l-cysteine and excellent photostability and biocompatibility from the CQDs, are proven to be highly suitable for long-term in situ imaging of the Golgi. Investigation of the mechanism showed that free thiol groups and the l-type stereo configuration of LC-CQDs are essential for specific targeting of the Golgi. With the aid of the as-prepared LC-CQDs, the dynamic changes of the Golgi in the early stage of viral infection were visualized. The Golgi targeting and imaging strategy used in this work is beneficial for Golgi-targeted drug delivery and early diagnosis and therapy of Golgi diseases.
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Affiliation(s)
- Rong Sheng Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Peng Fei Gao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Hong Zhi Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Lin Ling Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Chun Mei Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Jian Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ;
| | - Yuan Fang Li
- College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , China
| | - Feng Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS) , Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Institute of Analytical Chemistry , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Na Li
- Beijing National Laboratory for Molecular Sciences (BNLMS) , Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Institute of Analytical Chemistry , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) , Ministry of Education , College of Pharmaceutical Sciences , Southwest University , Chongqing 400716 , China . ; .,College of Chemistry and Chemical Engineering , Southwest University , Chongqing 400715 , China
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893
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Park SY, Lee CY, An HR, Kim H, Lee YC, Park EC, Chun HS, Yang HY, Choi SH, Kim HS, Kang KS, Park HG, Kim JP, Choi Y, Lee J, Lee HU. Advanced carbon dots via plasma-induced surface functionalization for fluorescent and bio-medical applications. NANOSCALE 2017. [PMID: 28650486 DOI: 10.1039/c7nr03026f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Multifunctional carbon-based nanodots (C-dots) are synthesized using atmospheric plasma treatments involving reactive gases (oxygen and nitrogen). Surface design was achieved through one-step plasma treatment of C-dots (AC-paints) from polyethylene glycol used as a precursor. These AC-paints show high fluorescence, low cytotoxicity and excellent cellular imaging capability. They exhibit bright fluorescence with a quantum yield twice of traditional C-dots. The cytotoxicity of AC-paints was tested on BEAS2B, THLE2, A549 and hep3B cell lines. The in vivo experiments further demonstrated the biocompatibility of AC-paints using zebrafish as a model, and imaging tests demonstrated that the AC-paints can be used as bio-labels (at a concentration of <5 mg mL-1). Particularly, the oxygen plasma-treated AC-paints (AC-paints-O) show antibacterial effects due to increased levels of reactive oxygen species (ROS) in AC-paints (at a concentration of >1 mg mL-1). AC-paints can effectively inhibit the growth of Escherichia coli (E. coli) and Acinetobacter baumannii (A. baumannii). Such remarkable performance of the AC-paints has important applications in the biomedical field and environmental systems.
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Affiliation(s)
- So Young Park
- Advanced Nano-surface Research Group, Korea Basic Science Institute (KBSI), Daejeon 34133, Republic of Korea.
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894
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Zhang JH, Sun T, Niu A, Tang YM, Deng S, Luo W, Xu Q, Wei D, Pei DS. Perturbation effect of reduced graphene oxide quantum dots (rGOQDs) on aryl hydrocarbon receptor (AhR) pathway in zebrafish. Biomaterials 2017; 133:49-59. [DOI: 10.1016/j.biomaterials.2017.04.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 04/03/2017] [Accepted: 04/13/2017] [Indexed: 01/16/2023]
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895
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Peng Z, Han X, Li S, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Carbon dots: Biomacromolecule interaction, bioimaging and nanomedicine. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.001] [Citation(s) in RCA: 229] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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896
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Gao H, Xue C, Hu G, Zhu K. Production of graphene quantum dots by ultrasound-assisted exfoliation in supercritical CO 2/H 2O medium. ULTRASONICS SONOCHEMISTRY 2017; 37:120-127. [PMID: 28427614 DOI: 10.1016/j.ultsonch.2017.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 01/03/2017] [Accepted: 01/03/2017] [Indexed: 05/13/2023]
Abstract
In this research, three kinds of graphene quantum dots (GQDs)-pristine graphene quantum dots (PGQDs), expanded graphene quantum dots (EGQDs) and graphene oxide quantum dots (GOQDs)-were produced from natural graphite, expanded graphite, and oxide graphite respectively in an ultrasound-assisted supercritical CO2 (scCO2)/H2O system. The effects of aqueous solution content ratio, system pressure, and ultrasonic power on the yields of different kinds of GQDs were investigated. According to these experiment results, the combination of the intense knocking force generated from high-pressure acoustic cavitation in a scCO2/H2O system and the superior penetration ability of scCO2 was considered to be the key to the successful exfoliation of such tiny pieces from bulk graphite. An interesting result was found that, contrary to common experience, the yield of PGQDs from natural graphite was much higher than that of GOQDs from graphite oxide. Based on the experimental analysis, the larger interlayer resistance of natural graphite, which hindered the insertion of scCO2 molecules, and the hydrophobic property of natural graphite surface, which made the planar more susceptible to the attack of ultrasonic collapsing bubbles, were deduced to be the two main reasons for this result. The differences in characteristics among the three kinds of GQDs were also studied and compared in this research. In our opinion, this low-cost and time-saving method may provide an alternative green route for the production of various kinds of GQDs, especially PGQDs.
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Affiliation(s)
- Hanyang Gao
- School of Mechanical Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone, 310018 Hangzhou, Zhejiang Province, China
| | - Chen Xue
- School of Mechanical and Power Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China
| | - Guoxin Hu
- School of Mechanical and Power Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China.
| | - Kunxu Zhu
- School of Mechanical and Power Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China
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897
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Functional hybrid nanostructure materials: Advanced strategies for sensing applications toward volatile organic compounds. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.04.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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898
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Zhao X, Li M, Dong H, Liu Y, Hu H, Cai Y, Liang Y, Xiao Y, Zheng M. Interconnected 3 D Network of Graphene-Oxide Nanosheets Decorated with Carbon Dots for High-Performance Supercapacitors. CHEMSUSCHEM 2017; 10:2626-2634. [PMID: 28440020 DOI: 10.1002/cssc.201700474] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Indexed: 05/25/2023]
Abstract
Interconnected 3 D nanosheet networks of reduced graphene oxide decorated with carbon dots (rGO/CDs) are successfully fabricated through a simple one-pot hydrothermal process. The as-prepared rGO/CDs present appropriate 3 D interconnectivity and abundant stable oxygen-containing functional groups, to which we can attribute the excellent electrochemical performance such as high specific capacitance, good rate capability, and great cycling stability. Employed as binder-free electrodes for supercapacitors, the resulting rGO/CDs exhibit excellent long-term cycling stability (ca. 92 % capacitance retention after 20 000 charge/discharge cycles at current density of 10 A g-1 ) as well as a maximum specific capacitance of about 308 F g-1 at current density of 0.5 A g-1 , which is much higher than that of rGO (200 F g-1 ) and CDs (2.2 F g-1 ). This work provides a promising strategy to fabricate graphene-based nanomaterials with greatly boosted electrochemical performances by decoration of with CDs.
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Affiliation(s)
- Xiao Zhao
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Ming Li
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Hanwu Dong
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Yingliang Liu
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Hang Hu
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Yijin Cai
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Yeru Liang
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Yong Xiao
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Mingtao Zheng
- Department of Materials Science and Engineering, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, P. R. China
- Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, South China Agricultural University, Guangzhou, 510642, P. R. China
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899
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Cao M, Yang S, Zhang Y, Song X, Che Y, Zhang H, Yu Y, Ding G, Zhang G, Yao J. Tunable amplified spontaneous emission in graphene quantum dots doped cholesteric liquid crystals. NANOTECHNOLOGY 2017; 28:245202. [PMID: 28319039 DOI: 10.1088/1361-6528/aa67ca] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Graphene quantum dots (GQDs) have received much research attention, because of their useful structure and optical absorption/emission. We report the tunable amplified spontaneous emission (ASE) in GQD-doped cholesteric liquid crystal (CLC), which to the best of our knowledge has not been previously observed. The GQDs are uniformly dispersed with a weight ratio of 0.5 wt.% in CLC. Under optical excitation, typical ASE is triggered in the system at pump energies greater than 1.25 mJ cm-2. The emission peak at the long wavelength edge of the photonic bandgap shifts from 662 to 669 nm, as the working temperature is increased from 50 to 90 °C. The preparation of the combined GQDs and CLC is simple and low-cost, and the resulting material is photostable and non-toxic. Combining the GQD gain material with the self-assembled CLC resonator has potential in the fabrication of ASE source and laser devices.
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Affiliation(s)
- Mingxuan Cao
- Key Laboratory of Opto-Electronics Information Technology, Ministry of Education, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
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900
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Rawal S, Yang YP, Cote R, Agarwal A. Identification and Quantitation of Circulating Tumor Cells. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2017; 10:321-343. [PMID: 28301753 DOI: 10.1146/annurev-anchem-061516-045405] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Circulating tumor cells (CTCs) are shed from the primary tumor into the circulatory system and act as seeds that initiate cancer metastasis to distant sites. CTC enumeration has been shown to have a significant prognostic value as a surrogate marker in various cancers. The widespread clinical utility of CTC tests, however, is still limited due to the inherent rarity and heterogeneity of CTCs, which necessitate robust techniques for their efficient enrichment and detection. Significant recent advances have resulted in technologies with the ability to improve yield and purity of CTC enrichment as well as detection sensitivity. Current efforts are largely focused on the translation and standardization of assays to fully realize the clinical utility of CTCs. In this review, we aim to provide a comprehensive overview of CTC enrichment and detection techniques with an emphasis on novel approaches for rapid quantification of CTCs.
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Affiliation(s)
- Siddarth Rawal
- Department of Pathology, DJTMF Biomedical Nanotechnology Institute, University of Miami, Coral Gables, Florida 33146
| | - Yu-Ping Yang
- Department of Pathology, DJTMF Biomedical Nanotechnology Institute, University of Miami, Coral Gables, Florida 33146
- Department of Biochemistry and Molecular Biology, University of Miami, Coral Gables, Florida 33146
| | - Richard Cote
- Department of Pathology, DJTMF Biomedical Nanotechnology Institute, University of Miami, Coral Gables, Florida 33146
- Department of Biochemistry and Molecular Biology, University of Miami, Coral Gables, Florida 33146
| | - Ashutosh Agarwal
- Department of Pathology, DJTMF Biomedical Nanotechnology Institute, University of Miami, Coral Gables, Florida 33146
- Department of Biomedical Engineering, University of Miami, Coral Gables, Florida 33146;
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