151
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Wang H, Lu Q, Hou Y, Liu Y, Zhang Y. High fluorescence S, N co-doped carbon dots as an ultra-sensitive fluorescent probe for the determination of uric acid. Talanta 2016; 155:62-9. [DOI: 10.1016/j.talanta.2016.04.020] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 04/08/2016] [Accepted: 04/09/2016] [Indexed: 12/29/2022]
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152
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Shangguan J, He D, He X, Wang K, Xu F, Liu J, Tang J, Yang X, Huang J. Label-Free Carbon-Dots-Based Ratiometric Fluorescence pH Nanoprobes for Intracellular pH Sensing. Anal Chem 2016; 88:7837-43. [DOI: 10.1021/acs.analchem.6b01932] [Citation(s) in RCA: 215] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jingfang Shangguan
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Dinggeng He
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Xiaoxiao He
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Kemin Wang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Fengzhou Xu
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Jinquan Liu
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Jinlu Tang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Xue Yang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Jin Huang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and
Molecule Engineering of Hunan Province, Changsha 410082, China
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153
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Hou J, Wang L, Zhang P, Xu Y, Ding L. Facile synthesis of carbon dots in an immiscible system with excitation-independent emission and thermally activated delayed fluorescence. Chem Commun (Camb) 2016; 51:17768-71. [PMID: 26498875 DOI: 10.1039/c5cc08152a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Herein, we present a one-pot microwave-assisted preparative method for water-soluble carbon dots (CDs) in an immiscible system. CDs demonstrated uniform morphology, high quantum yield and excitation-independent fluorescence emission. Moreover, we first reported the observation of thermally activated delayed fluorescence from CDs.
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Affiliation(s)
- Juan Hou
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Long Wang
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Ping Zhang
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Yuan Xu
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Lan Ding
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
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154
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Gupta AS, Paul K, Luxami V. Benzimidazole based ratiometric chemosensor for detection of CN− and Cu2+ ions in protic/aqueous system: Elaboration as XOR logic operation. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.11.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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155
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Campos BB, Oliva MM, Contreras-Cáceres R, Rodriguez-Castellón E, Jiménez-Jiménez J, da Silva JCE, Algarra M. Carbon dots on based folic acid coated with PAMAM dendrimer as platform for Pt(IV) detection. J Colloid Interface Sci 2016; 465:165-73. [DOI: 10.1016/j.jcis.2015.11.059] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/19/2015] [Accepted: 11/23/2015] [Indexed: 02/06/2023]
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156
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Wu F, Su H, Zhu X, Wang K, Zhang Z, Wong WK. Near-infrared emissive lanthanide hybridized carbon quantum dots for bioimaging applications. J Mater Chem B 2016; 4:6366-6372. [DOI: 10.1039/c6tb01646d] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Facile preparation of lanthanide hybridized carbon quantum dots (Ln-CQDs) and their potential for visible/NIR bioimagingin vivo.
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Affiliation(s)
- Fengshou Wu
- Key Laboratory for Green Chemical Process of the Ministry of Education
- Wuhan Institute of Technology
- Wuhan
- P. R. China
- Department of Chemistry
| | - Huifang Su
- Sun Yat-sen University Cancer Center
- State Key Laboratory of Oncology in South China
- Collaborative Innovation Center for Cancer Medicine
- Guangzhou
- P. R. China
| | - Xunjin Zhu
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong
- P. R. China
| | - Kai Wang
- Key Laboratory for Green Chemical Process of the Ministry of Education
- Wuhan Institute of Technology
- Wuhan
- P. R. China
| | - Zhenfeng Zhang
- Sun Yat-sen University Cancer Center
- State Key Laboratory of Oncology in South China
- Collaborative Innovation Center for Cancer Medicine
- Guangzhou
- P. R. China
| | - Wai-Kwok Wong
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong
- P. R. China
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157
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Ming F, Hong J, Xu X, Wang Z. Dandelion-like ZnS/carbon quantum dots hybrid materials with enhanced photocatalytic activity toward organic pollutants. RSC Adv 2016. [DOI: 10.1039/c6ra02840c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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158
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Zhou S, Xu H, Gan W, Yuan Q. Graphene quantum dots: recent progress in preparation and fluorescence sensing applications. RSC Adv 2016. [DOI: 10.1039/c6ra24349e] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This paper reviews recent activities in the preparation and fluorescence sensing applications of graphene quantum dots.
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Affiliation(s)
- Shenghai Zhou
- College of Chemistry and Chemical Engineering
- Hebei Normal University for Nationalities
- Chengde 067000
- China
- Laboratory of Environmental Science and Technology
| | - Hongbo Xu
- College of Chemistry and Chemical Engineering
- Hebei Normal University for Nationalities
- Chengde 067000
- China
- Laboratory of Environmental Science and Technology
| | - Wei Gan
- School of Natural Sciences and Humanities
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Laboratory of Environmental Science and Technology
| | - Qunhui Yuan
- School of Materials Science and Engineering
- Harbin Institute of Technology
- Shenzhen 518055
- China
- Laboratory of Environmental Science and Technology
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159
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Yuan H, Yu J, Feng S, Gong Y. Highly photoluminescent pH-independent nitrogen-doped carbon dots for sensitive and selective sensing of p-nitrophenol. RSC Adv 2016. [DOI: 10.1039/c5ra26870b] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Highly photoluminescent pH-independent nitrogen-doped carbon dots prepared from maleic acid and ethylenediamine exhibit highly sensitive and selective sensing of p-nitrophenol.
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Affiliation(s)
- Huan Yuan
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang 453007
- China
| | - Jie Yu
- Department of Chemistry
- Xinxiang Medical University
- Xinxiang 453007
- China
| | - Suling Feng
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang 453007
- China
| | - Yijun Gong
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang 453007
- China
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160
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Wang K, Dong J, Sun L, Chen H, Wang Y, Wang C, Dong L. Effects of elemental doping on the photoluminescence properties of graphene quantum dots. RSC Adv 2016. [DOI: 10.1039/c6ra19673j] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
B/N//P/S atoms were doped into graphene quantum dots to tailor their surface functional groups and structural defects with the aim of improving their photoluminescence properties.
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Affiliation(s)
- Kaiqi Wang
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Jian Dong
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Liping Sun
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Hongyu Chen
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Yi Wang
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Chongxin Wang
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
| | - Lifeng Dong
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Taian
- P. R. China
- Department of Physics
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161
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Fu X, Gu Z, Lu Q, Liao J, Chen S. A solid-state electrochemiluminescent sensor based on C60/graphite-like carbon nitride nanosheet hybrids for detecting melamine. RSC Adv 2016. [DOI: 10.1039/c5ra19344c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration of preparing C60/g-C3N4 NS and the fabricating procedures of the proposed ECL sensor.
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Affiliation(s)
- Xiaomin Fu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Zhengcong Gu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Qiyi Lu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Jiayao Liao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Shihong Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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162
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Samantara AK, Maji S, Ghosh A, Bag B, Dash R, Jena BK. Good's buffer derived highly emissive carbon quantum dots: excellent biocompatible anticancer drug carrier. J Mater Chem B 2016; 4:2412-2420. [DOI: 10.1039/c6tb00081a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile one-step approach has been developed for the synthesis of carbon quantum dots (CQDs) from Good’s buffer.
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Affiliation(s)
- Aneeya K. Samantara
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
| | - Santanu Maji
- Institute of Life Sciences
- Bhubaneswar 751023
- India
- Manipal University
- India
| | | | - Bamaprasad Bag
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
| | - Rupesh Dash
- Institute of Life Sciences
- Bhubaneswar 751023
- India
| | - Bikash Kumar Jena
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
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163
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Guo R, Zhou S, Li Y, Li X, Fan L, Voelcker NH. Rhodamine-Functionalized Graphene Quantum Dots for Detection of Fe(3+) in Cancer Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23958-23966. [PMID: 26317667 DOI: 10.1021/acsami.5b06523] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A turn-on orange-red fluorescent nanosensor based on rhodamine B derivative-functionalized graphene quantum dots (RBD-GQDs) has been successfully synthesized for Fe(3+) detection with high sensitivity and selectivity. By connecting with GQDs, the water solubility, sensitivity, photostability, and biocompatibility of RBD are drastically improved. The most distinctive feature of the RBD-GQDs, which sets them apart from other previously reported fluorophores or GQDs, is that they with the detection limits as low as 0.02 μM are demonstrated as a Fe(3+) turn-on fluorescent nanosensor in cancer stem cells. Fe(3+) binding to such GQDs (RBD-GQDs-Fe(3+)) with orange-red fluorescence of 43% quantum yield were demonstrated to be the biomarkers for cancer stem cell imaging.
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Affiliation(s)
- Ruihua Guo
- Department of Chemistry, Beijing Normal University , Beijing 100875, P. R. China
| | - Shixin Zhou
- Department of Cell Biology, School of Basic Medicine, Peking University Health Science Center , Beijing 100191, P. R. China
| | - Yunchao Li
- Department of Chemistry, Beijing Normal University , Beijing 100875, P. R. China
| | - Xiaohong Li
- Department of Chemistry, Beijing Normal University , Beijing 100875, P. R. China
| | - Louzhen Fan
- Department of Chemistry, Beijing Normal University , Beijing 100875, P. R. China
| | - Nicolas H Voelcker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia , Mawson Lakes, South Australia 5095, Australia
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164
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Yuan YH, Li RS, Wang Q, Wu ZL, Wang J, Liu H, Huang CZ. Germanium-doped carbon dots as a new type of fluorescent probe for visualizing the dynamic invasions of mercury(II) ions into cancer cells. NANOSCALE 2015; 7:16841-7. [PMID: 26403476 DOI: 10.1039/c5nr05326a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Carbon dots doped with germanium (GeCDs) were firstly prepared by a new simple 15 min carbonation synthesis route, exhibiting excitation-independent photoluminescence (PL), which could avoid autofluorescence in bioimaging applications. The as-prepared GeCDs have low cell toxicity, good biocompatibility, high intracellular delivery efficiency, stability and could be applied for detection of mercury(II) ions with excellent selectivity in complicated medium. It is to be noted that the as-prepared GeCDs used as a new type of probe for visualization of dynamic invasions of mercury(II) ions into Hep-2 cells display greatly different properties from most of the previously reported CDs which are regularly responsive to iron ions. All the results suggest that the GeCDs can be employed for visualization and monitoring of the significant physiological changes of living cells induced by Hg(2+).
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Affiliation(s)
- Yun Huan Yuan
- Key Laboratory on Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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165
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Jiang K, Sun S, Zhang L, Wang Y, Cai C, Lin H. Bright-Yellow-Emissive N-Doped Carbon Dots: Preparation, Cellular Imaging, and Bifunctional Sensing. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23231-8. [PMID: 26426200 DOI: 10.1021/acsami.5b07255] [Citation(s) in RCA: 221] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Fluorescent carbon dots (CDs) have attracted much attention in recent years because of their superior optical and chemical properties, thus demonstrating many potential applications. However, the previously reported CDs mostly show strong emission only in the blue-light region, and the long-wavelength (i.e., yellow- to red-light) emissions are usually very weak. Such a drawback restricts their further applications, particularly in the biology-relevant fields. Herein, a rare example of N-doped CDs that emit bright-yellow fluorescence (i.e., y-CDs) is reported using 1,2,4-triaminobenzene as carbon precursor. The as-prepared y-CDs exhibit not only respectable emission quantum yield and highly optical stabilities but superior biocompatibility and biolabeling potentials. In addition, the y-CDs are found to show an interesting "ON-OFF-ON" three-state emission with the stepwise addition of Ag(+) and cysteine (Cys), indicating potential applications as a bifunctional sensing platform. Thanks to the highly intense emission of y-CDs, the gradual quenching and restoration of their fluorescence with the addition of Ag(+) and further Cys could also be observed with the naked eye. More importantly, the ensemble of the y-CDs and Ag(+) demonstrates practicability for the highly selective and sensitive detection of Cys in human plasma samples with satisfactory results.
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Affiliation(s)
- Kai Jiang
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences , Ningbo 315201, PR China
- Department of Applied Physics, Chongqing University , Chongqing 401331, PR China
| | - Shan Sun
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences , Ningbo 315201, PR China
| | - Ling Zhang
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences , Ningbo 315201, PR China
| | - Yuhui Wang
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences , Ningbo 315201, PR China
| | - Congzhong Cai
- Department of Applied Physics, Chongqing University , Chongqing 401331, PR China
| | - Hengwei Lin
- Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences , Ningbo 315201, PR China
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166
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Xu M, Xu S, Yang Z, Shu M, He G, Huang D, Zhang L, Li L, Cui D, Zhang Y. Hydrophilic and blue fluorescent N-doped carbon dots from tartaric acid and various alkylol amines under microwave irradiation. NANOSCALE 2015; 7:15915-23. [PMID: 26364977 DOI: 10.1039/c5nr04209g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The desired control of particle size, doping element composition, and surface structure of carbon dots (CDs) are vital for understanding the fluorescence mechanism and exploring their potential applications. Herein, nitrogen-doped CDs (N-doped CDs) have been synthesized with tartaric acid and various alkylol amines (monoethanolamine, biethanolamine and triethanolamine) under microwave irradiation. A systematic investigation was performed to characterize the N-doped CDs. It is found that with increasing nitrogen proportion, the fluorescent quantum yield and lifetime of N-doped CDs increases, whereas cell toxicity decreases. In other words, N-doped CDs synthesized by tartaric acid and monoethanolamine have the highest nitrogen content, the highest fluorescent quantum yield, the longest lifetime and the lowest cell toxicity. A corresponding mechanism has been proposed. Moreover, as-synthesized N-doped CDs have been applied for selectively detecting the Fe(3+) ion and writing letters as a fluorescent ink.
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Affiliation(s)
- Minghan Xu
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
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167
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Li L, Yu B, Zhang X, You T. A novel electrochemiluminescence sensor based on Ru(bpy)₃²⁺/N-doped carbon nanodots system for the detection of bisphenol A. Anal Chim Acta 2015; 895:104-11. [PMID: 26454465 DOI: 10.1016/j.aca.2015.08.055] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 08/26/2015] [Accepted: 08/30/2015] [Indexed: 11/29/2022]
Abstract
A novel Ru(bpy)3(2+)-based electrochemiluminescence (ECL) sensing platform, using N-doped carbon nanodots (N-C dots) as co-reactant, was established for the sensitive and selective detection of bisphenol A (BPA). N-C dots not only could enhance the ECL signal, but also significantly improved the reproducibility and stability of Ru(bpy)3(2+) ECL system. The developed ECL sensing system was sensitive to detect BPA based on its efficient quenching effect on Ru(bpy)3(2+)/N-C dots. The N-C dots-enhanced ECL mechanism and BPA-quenched ECL mechanism were investigated. Under the optimum conditions, the inhibited ECL intensity was in good linear relationship versus the concentration of BPA in the range of 0.03-1.0 μM with the detection limit of 10 nM. The relative standard deviation (RSD) for 25 successive measurements with one sensor was 1.1% and for eight different sensors was 2.5%, respectively. The fabricated sensing platform was successfully applied for the detection of BPA in baby bottle and nipple, and relatively satisfactory recoveries were obtained.
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Affiliation(s)
- Libo Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Bin Yu
- College of Life Science, Jilin University, Changchun, Jilin 130012, China
| | - Xueping Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Tianyan You
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
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168
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Tan M, Li X, Wu H, Wang B, Wu J. N-doped carbon dots derived from bovine serum albumin and formic acid with one- and two-photon fluorescence for live cell nuclear imaging. Colloids Surf B Biointerfaces 2015; 136:141-9. [PMID: 26381697 DOI: 10.1016/j.colsurfb.2015.09.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 08/22/2015] [Accepted: 09/03/2015] [Indexed: 11/28/2022]
Abstract
Carbon dots with both one- and two-photon fluorescence have drawn great attention for biomedical imaging. Herein, nitrogen-doped carbon dots were facilely developed by one-pot hydrothermal method using bovine serum albumin and formic acid as carbon sources. They are highly water-soluble with strong fluorescence when excited with ultraviolet or near infrared light. The carbon dots have a diameter of ~8.32 nm and can emit strong two-photon induced fluorescence upon excitation at 750 nm with a femtosecond laser. X-ray photoelectron spectrometer analysis revealed that the carbon dots contained three components, C, N and O, corresponding to the peak at 285, 398 and 532 eV, respectively. The Fourier-transform infrared spectroscopy analysis revealed that there are carboxyl and carboxylic groups on the surface, which allowed further linking of functional molecules. pH stability study demonstrated that the carbon dots are able to be used in a wide range of pH values. The fluorescence mechanism is also discussed in this study. Importantly, these carbon dots are biocompatible and highly photostable, which can be directly applied for both one- and two-photon living cell imaging. After proper surface functionalization with TAT peptide, they can be used as fluorescent probes for live cell nuclear-targeted imaging.
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Affiliation(s)
- Mingqian Tan
- Liaoning Province Key Laboratory of Seafood Science and Technology, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, 1 Qinggongyuan, Ganjingzi District, Dalian 116034, China.
| | - Xintong Li
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China; Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Hao Wu
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Beibei Wang
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Jing Wu
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
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169
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Ionic liquid as a precursor to synthesize nitrogen- and sulfur-co-doped carbon dots for detection of copper(II) ions. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-5118-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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170
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In situ photochemical synthesis of fluorescent carbon dots for optical sensing of hydrogen peroxide and antioxidants. Talanta 2015; 144:1308-15. [PMID: 26452963 DOI: 10.1016/j.talanta.2015.07.093] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 07/27/2015] [Accepted: 07/31/2015] [Indexed: 01/06/2023]
Abstract
A new synthesis approach for obtaining fluorescent carbon dots (CDs) based on UV irradiation of carbohydrates was developed. The photochemical synthesis pathway allows the formation of water soluble CDs of analytical usefulness within one min. CDs obtained by photochemical treatment from the sucrose/NaOH/poly(ethylene glycol) system are monodisperse with an average size of 8 nm as determined by transmission electron microscopy. A dramatic increase in the CDs fluorescence (turn on) is observed when H2O2 is added. The decrease in CDs size occurring by the action of highly oxidant OH radicals gives rise to confinement of emissive energy traps and, in turn, to fluorescence enhancement. Antioxidants such as ascorbic acid and glutathione inhibit the photochemical reaction giving rise to a decrease in fluorescence of the CDs/H2O2 system (turn on-off). The detection limit was 5 µM H2O2 and the repeatability expressed as the relative standard deviation was 3.8% (N=7). The photochemical synthesis of CDs allows building a green, low-cost, safe and fast assay for the detection of H2O2 and antioxidants. An application of the novel fluorescent nanoprobe to H2O2 detection in contact lens cleaning solutions is performed.
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171
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Li L, Yu B, You T. Nitrogen and sulfur co-doped carbon dots for highly selective and sensitive detection of Hg (II) ions. Biosens Bioelectron 2015; 74:263-9. [PMID: 26143466 DOI: 10.1016/j.bios.2015.06.050] [Citation(s) in RCA: 262] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 06/19/2015] [Accepted: 06/20/2015] [Indexed: 01/07/2023]
Abstract
Nitrogen and sulfur co-doped carbon dots (N,S/C-dots) with high fluorescence quantum yields (FLQY, 25%) was successfully synthesized by a one-step microwave-assisted method. In comparison with nitrogen doped C-dots (N/C-dots) prepared using the same method, the resulting N,S/C-dots featured small particle size, uniform surface state, insensitive FL properties to excitation wavelengths and environmental conditions, negligible cytotoxicity and excellent biocompatibility. Simultaneous doping of N and S effectively promoted electron-transfer and coordination interaction between N,S/C-dots and Hg(2+). Thus, when used as fluorescence probe for Hg(2+) label-free detection, the resulting N,S/C-dots showed good detection sensitivity and ion selectivity. The limit of detection was 2 μM; among 15 metal ions investigated, only Fe(3+) showed interference to the Hg(2+) detection. Fortunately, this interference could be effectively shielded using a chelating agent sodium hexametaphoshpate. The applicability of N,S/C-dots as fluorescence probe for Hg(2+) detection in lake water and tap water was demonstrated. Finally, based on its favorable features of negligible cytotoxicity and excellent biocompatibility, the N,S/C-dots were successfully applied to probe Hg(2+) in living cells, which broaden its application in biological system.
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Affiliation(s)
- Libo Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Bin Yu
- College of Life Science, Jilin University, Changchun, Jilin 130012, China
| | - Tianyan You
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
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172
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Ma CB, Zhu ZT, Wang HX, Huang X, Zhang X, Qi X, Zhang HL, Zhu Y, Deng X, Peng Y, Han Y, Zhang H. A general solid-state synthesis of chemically-doped fluorescent graphene quantum dots for bioimaging and optoelectronic applications. NANOSCALE 2015; 7:10162-10169. [PMID: 25985855 DOI: 10.1039/c5nr01757b] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Graphene quantum dots (GQDs) have attracted increasing interest because of their excellent properties such as strong photoluminescence, excellent biocompatibility and low cost. Herein, we develop a general method for the synthesis of doped and undoped GQDs, which relies on direct carbonization of organic precursors in the solid state.
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Affiliation(s)
- Chong-Bo Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering Lanzhou University, Lanzhou, 730000, P. R. China.
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173
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Chandra S, Laha D, Pramanik A, Ray Chowdhuri A, Karmakar P, Sahu SK. Synthesis of highly fluorescent nitrogen and phosphorus doped carbon dots for the detection of Fe(3+) ions in cancer cells. LUMINESCENCE 2015; 31:81-7. [PMID: 25964146 DOI: 10.1002/bio.2927] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 03/22/2015] [Accepted: 03/30/2015] [Indexed: 01/19/2023]
Abstract
Highly fluorescent nitrogen and phosphorus-doped carbon dots with a quantum yield 59% have been successfully synthesized from citric acid and di-ammonium hydrogen phosphate by single step hydrothermal method. The synthesized carbon dots have high solubility as well as stability in aqueous medium. The as-obtained carbon dots are well monodispersed with particle sizes 1.5-4 nm. Owing to a good tunable fluorescence property and biocompatibility, the carbon dots were applied for intercellular sensing of Fe(3+) ions as well as cancer cell imaging.
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Affiliation(s)
- Soumen Chandra
- Department of Applied Chemistry, Indian School of Mines, Dhanbad, Jharkhand, India
| | - Dipranjan Laha
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, India
| | - Arindam Pramanik
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, India
| | | | - Parimal Karmakar
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, India
| | - Sumanta Kumar Sahu
- Department of Applied Chemistry, Indian School of Mines, Dhanbad, Jharkhand, India
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174
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Zhang Y, Wang Y, Guan Y, Feng L. Uncovering the pKa dependent fluorescence quenching of carbon dots induced by chlorophenols. NANOSCALE 2015; 7:6348-55. [PMID: 25785565 DOI: 10.1039/c5nr00490j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Fluorescence quenching induced by targets is always an alluring strategy to elucidate the possible photoluminescence origin of carbon dots. In this study, a new kind of N, S co-doped carbon dots (NSCDs) was synthesized and the fluorescence of NSCDs was surprisingly found to be quenched by chlorophenols (CPs) in a pKa dependent mode. Detailed investigation of this behavior demonstrated that phenolate was the responsible species and N and/or S dopants in NSCDs failed to play a role in the fluorescence quenching. Further evidence uncovered that the quenching was a static one, where a non-fluorescent intermediate was formed between electron-deficient C=O on the CDs surface and the electron-rich phenolic oxygen anion of chlorophenolate via nucleophilic addition. Moreover, one of the main photoluminescence origins of this kind of CDs was derived, namely surface emissive sites mostly attributed to carbonyl groups.
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Affiliation(s)
- Yu Zhang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, P. R. China.
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175
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Zheng XT, Ananthanarayanan A, Luo KQ, Chen P. Glowing graphene quantum dots and carbon dots: properties, syntheses, and biological applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1620-36. [PMID: 25521301 DOI: 10.1002/smll.201402648] [Citation(s) in RCA: 1057] [Impact Index Per Article: 117.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 10/12/2014] [Indexed: 05/20/2023]
Abstract
The emerging graphene quantum dots (GQDs) and carbon dots (C-dots) have gained tremendous attention for their enormous potentials for biomedical applications, owing to their unique and tunable photoluminescence properties, exceptional physicochemical properties, high photostability, biocompatibility, and small size. This article aims to update the latest results in this rapidly evolving field and to provide critical insights to inspire more exciting developments. We comparatively review the properties and synthesis methods of these carbon nanodots and place emphasis on their biological (both fundamental and theranostic) applications.
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Affiliation(s)
- Xin Ting Zheng
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457, Singapore
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176
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Qian Z, Chai L, Tang C, Huang Y, Chen J, Feng H. Carbon quantum dots-based recyclable real-time fluorescence assay for alkaline phosphatase with adenosine triphosphate as substrate. Anal Chem 2015; 87:2966-73. [PMID: 25642736 DOI: 10.1021/ac504519b] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A convenient, reliable, and highly sensitive real-time assay for alkaline phosphatase (ALP) activity in the continuous and recyclable way is established on the basis of aggregation and disaggregation of carbon quantum dots (CQDs) through the competitive assay approach. CQDs and adenosine triphosphate (ATP) were used as the fluorescent indicator and substrate for ALP activity assessment, respectively. Richness of carboxyl groups on the surface of CQDs enables their severe aggregation triggered by cerium ions, which results in effective fluorescence quenching. Under the catalytic hydrolysis of ALP, ATP can be rapidly transformed to phosphate ions. Stronger affinity of phosphate ions to cerium ions than carboxyl groups is taken advantage of to achieve fluorescence recovery induced by redispersion of CQDs in the presence of ALP and ATP. Quantitative evaluation of ALP activity in a broad range from 4.6 to 383.3 U/L with the detection limit of 1.4 U/L can be realized in this way, which endows the assay with high enough sensitivity for practical detection in human serum. The assay can be used in a recyclable way for more than three times since the generated product CePO4 as a precipitate can be easily removed from the standard assay system. This strategy broadens the sensing application of fluorescent CQDs with excellent biocompatibility and provides an example based on disaggregation in optical probe development.
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Affiliation(s)
- Zhaosheng Qian
- College of Chemistry and Life Science, Zhejiang Normal University , Jinhua 321004, China
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177
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Montalti M, Cantelli A, Battistelli G. Nanodiamonds and silicon quantum dots: ultrastable and biocompatible luminescent nanoprobes for long-term bioimaging. Chem Soc Rev 2015; 44:4853-921. [DOI: 10.1039/c4cs00486h] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ultra-stability and low-toxicity of silicon quantum dots and fluorescent nanodiamonds for long-termin vitroandin vivobioimaging are demonstrated.
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Affiliation(s)
- M. Montalti
- Department of Chemistry “G. Ciamician”
- University of Bologna
- Bologna
- Italy
| | - A. Cantelli
- Department of Chemistry “G. Ciamician”
- University of Bologna
- Bologna
- Italy
| | - G. Battistelli
- Department of Chemistry “G. Ciamician”
- University of Bologna
- Bologna
- Italy
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178
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Liu L, Feng F, Paau MC, Hu Q, Liu Y, Chen Z, Choi MMF. Carbon dots isolated from chromatographic fractions for sensing applications. RSC Adv 2015. [DOI: 10.1039/c5ra21137a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An as-synthesised C-dots sample derived from acetic acid, NAC and P2O5 can be separated and fractionated into various C-dots species by HPLC. The brighter C-dots fractions can be used as fluorescent probes for sensitive detection of Fe3+ and Hg2+.
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Affiliation(s)
- Lizhen Liu
- School of Chemistry and Materials Science
- Shanxi Normal University
- Linfen 041004
- China
- College of Chemistry and Chemical Engineering
| | - Feng Feng
- School of Chemistry and Materials Science
- Shanxi Normal University
- Linfen 041004
- China
- College of Chemistry and Chemical Engineering
| | - Man Chin Paau
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong SAR
- China
| | - Qin Hu
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong SAR
- China
| | - Yang Liu
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong SAR
- China
| | - Zezhong Chen
- College of Chemistry and Chemical Engineering
- Shanxi Datong University
- Datong 037009
- China
| | - Martin M. F. Choi
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong SAR
- China
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179
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Jalili R, Amjadi M. Surface molecular imprinting on silane-functionalized carbon dots for selective recognition of nifedipine. RSC Adv 2015. [DOI: 10.1039/c5ra12189b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
An eco-friendly molecularly imprinted fluorescent sensor was developed for nifedipine (NIF) based on silane-functionalized carbon dots.
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Affiliation(s)
- Roghayeh Jalili
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166616471
- Iran
| | - Mohammad Amjadi
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166616471
- Iran
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180
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Chen G, Guo Z, Zeng G, Tang L. Fluorescent and colorimetric sensors for environmental mercury detection. Analyst 2015; 140:5400-43. [DOI: 10.1039/c5an00389j] [Citation(s) in RCA: 253] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The development of fluorescent and colorimetric sensing strategies for environmental mercury is described.
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Affiliation(s)
- Guiqiu Chen
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P.R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Zhi Guo
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P.R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Guangming Zeng
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P.R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Lin Tang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P.R. China
- Key Laboratory of Environmental Biology and Pollution Control
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181
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Fu C, Qiang L, Liang Q, Chen X, Li L, Liu H, Tan L, Liu T, Ren X, Meng X. Facile synthesis of a highly luminescent carbon dot@silica nanorattle for in vivo bioimaging. RSC Adv 2015. [DOI: 10.1039/c5ra04311e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon dots embedded in silica nanorattle (CDs@SN) nanocomposites with high luminescence are synthesized and exhibit brighter fluorescence in vitro and in vivo than CDs alone.
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182
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Baptista FR, Belhout SA, Giordani S, Quinn SJ. Recent developments in carbon nanomaterial sensors. Chem Soc Rev 2015; 44:4433-53. [DOI: 10.1039/c4cs00379a] [Citation(s) in RCA: 366] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The structural diversity of carbon nanomaterials provides an array of unique electronic, magnetic and optical properties, which when combined with their robust chemistry and ease of manipulation, makes them attractive candidates for sensor applications. In this review recent developments in the use of carbon nanoparticles and nanostructures as sensors and biosensors are explored.
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Affiliation(s)
| | - S. A. Belhout
- School of Chemistry
- University College Dublin
- Dublin 4
- Ireland
| | - S. Giordani
- Istituto Italiano di Tecnologia (IIT)
- Nano Carbon Materials
- Nanophysics Department
- 16163 Genova
- Italy
| | - S. J. Quinn
- School of Chemistry
- University College Dublin
- Dublin 4
- Ireland
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183
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Zhang C, Hu Z, Song L, Cui Y, Liu X. Valine-derived carbon dots with colour-tunable fluorescence for the detection of Hg2+ with high sensitivity and selectivity. NEW J CHEM 2015. [DOI: 10.1039/c5nj00554j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Green and yellow fluorescent carbon dots with high sensitivity and selectivity for Hg2+ were synthesized from H3PO4 oxidation of valine.
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Affiliation(s)
- Chunfang Zhang
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Zhongbo Hu
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Li Song
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Yanyan Cui
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Xiangfeng Liu
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
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184
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Yuan H, Li D, Liu Y, Xiong C. A General Method Towards Efficient Synthesis and Fluorescence Tuning of Carbon Black-Derived Carbon Dots via Controlled Liquid Oxidization. Aust J Chem 2015. [DOI: 10.1071/ch15014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Efficient synthesis and controlled modification of carbon dots (CDs) with tuneable properties on the basis of facile technical routes are of great significance for user-defined applications as well as more insightful understanding of the unique fluorescence from carbon nanomaterials. In this work, we report an improved nitric acid oxidization method towards low-cost and rapid preparation of fluorescent CDs. This is achieved by using industrial carbon black specimens as the precursor and implementing a reduced pressure distillation for the purpose of eliminating excessive acids. Unexpectedly, the product exhibits an interesting dual luminescence behaviour with tuneable characteristics that differs from all previously reported CDs. The strongest emissions at fixed or varied excitations can be simultaneously tuned from blue to green or yellow by simply prolonging the time of acid oxidization. These emissions show distinct stabilities in acid and alkaline environments, thereby making the resultant CDs very promising candidates for pH probes. It is further revealed that this simple synthesis and fluorescence tuning strategy is also applicable to CDs from other carbon blacks.
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185
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Ding H, Xiong HM. Exploring the blue luminescence origin of nitrogen-doped carbon dots by controlling the water amount in synthesis. RSC Adv 2015. [DOI: 10.1039/c5ra11796h] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Nitrogen doped carbon dots show regular changes in quantum yield when the water content in synthesis is adjusted, and their strong blue fluorescence is proved to arise from the CO groups on the nanoparticle surfaces.
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Affiliation(s)
- Hui Ding
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Huan-Ming Xiong
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
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186
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Wu G, Feng M, Zhan H. Generation of nitrogen-doped photoluminescent carbonaceous nanodots via the hydrothermal treatment of fish scales for the detection of hypochlorite. RSC Adv 2015. [DOI: 10.1039/c5ra04989j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Preparing nitrogen-doped (N-doped) photoluminescent carbonaceous nanodots (C-dots) from the recycling/utilisation of nitrogen-rich carbonaceous waste has received considerable research interest.
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Affiliation(s)
- Guoqin Wu
- College of Materials Science and Engineering
- Fuzhou University
- Fuzhou
- China
| | - Miao Feng
- College of Materials Science and Engineering
- Fuzhou University
- Fuzhou
- China
| | - Hongbing Zhan
- College of Materials Science and Engineering
- Fuzhou University
- Fuzhou
- China
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187
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Abstract
We discuss early advances in the preparation of doped graphene and its unique properties as well as its applications in bioanalysis.
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Affiliation(s)
- Wenyan Zhang
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Longfei Wu
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Zhaolong Li
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Yang Liu
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
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188
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Yan Z, Chen J, Xiao A, Shu J, Chen J. Effects of representative quantum dots on microorganisms and phytoplankton: a comparative study. RSC Adv 2015. [DOI: 10.1039/c5ra23730k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, we put forward more effective and convenient approaches to prepare three kinds of high-quality CQDs. Then we assessed their effects on Staphylococcus aureus and Microcystis aeruginosa.
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Affiliation(s)
- Zhengyu Yan
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Jiao Chen
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - An Xiao
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Juan Shu
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Jianqiu Chen
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
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189
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Qian ZS, Shan XY, Chai LJ, Chen JR, Feng H. A fluorescent nanosensor based on graphene quantum dots-aptamer probe and graphene oxide platform for detection of lead (II) ion. Biosens Bioelectron 2014; 68:225-231. [PMID: 25574861 DOI: 10.1016/j.bios.2014.12.057] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 12/25/2014] [Accepted: 12/27/2014] [Indexed: 01/11/2023]
Abstract
The sensitive detection of heavy metal ions in the organism and aquatic ecosystem using nanosensors based on environment friendly and biocompatible materials still remains a challenge. A fluorescent turn-on nanosensor for lead (II) detection based on biocompatible graphene quantum dots and graphene oxide by employment of Pb(2+)-induced G-quadruplex formation was reported. Graphene quantum dots with high quantum yield, good biocompatibility were prepared and served as the fluorophore of Pb(2+) probe. Fluorescence turn-off of graphene quantum dots is easily achieved through efficient photoinduced electron transfer between graphene quantum dots and graphene oxide, and subsequent fluorescence turn-on process is due to the formation of G-quadraplex aptamer-Pb(2+) complex triggered by the addition of Pb(2+). This nanosensor can distinguish Pb(2+) ion from other ions with high sensitivity and good reproducibility. The detection method based on this nanosensor possesses a fast response time of one minute, a broad linear span of up to 400.0 nM and ultralow detection limit of 0.6 nM.
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Affiliation(s)
- Zhao Sheng Qian
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Xiao Yue Shan
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Lu Jing Chai
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Jian Rong Chen
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Hui Feng
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
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190
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Guo Z, Zhang Z, Zhang W, Zhou L, Li H, Wang H, Andreazza-Vignolle C, Andreazza P, Zhao D, Wu Y, Wang Q, Zhang T, Jiang K. Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20700-20708. [PMID: 25408428 DOI: 10.1021/am5071078] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper reports the preparation and properties of color-switchable fluorescent carbon nanodots (C-dots). C-dots that emit dark turquoise and green-yellow fluorescence under 365 nm UV illumination were obtained from the hydrothermal decomposition of citric acid. Dark green fluorescent C-dots were obtained by conjugating prepared C-dots to form C-dot@C-dot nanoparticles. After successful conjugation of the C-dots, the fluorescence emission undergoes a blue-shift of nearly 20 nm (∼0.15 eV) under UV excitation at 370 nm. The C-dots emit goldenrod, green-yellow, and gold light under excitation at 455 nm, which shows that the prepared C-dots are color-switchable. Furthermore, conjugation of the C-dots results in enhanced, red-shifted absorption of the π-π* transition of the aromatic sp(2) domains due to the conjugated π-electron system. N incorporation in the carbon structure leads to a degree of dipoles for all the aromatic sp(2) bonds. The enhanced absorption in a wide range from 226 to 601 nm indicates extended conjugation in the C-dot@C-dot structure. The time-resolved average lifetimes for the three different types of C-dots prepared in this study are 7.10, 7.65, and 4.07 ns. The radiative rate (reduced decay lifetime) increases when the C-dots are conjugated in the C-dot@C-dot nanoparticles, leading to the enhanced fluorescence emission. The fluorescence emission of the C-dot@C-dot nanoparticles can be used in applications such as flow cytometry and cell imaging.
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Affiliation(s)
- Zhen Guo
- CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences , No. 88, Keling Road, Suzhou New District 215163, People's Republic of China
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191
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Cheng L, Li Y, Zhai X, Xu B, Cao Z, Liu W. Polycation-b-polyzwitterion copolymer grafted luminescent carbon dots as a multifunctional platform for serum-resistant gene delivery and bioimaging. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20487-20497. [PMID: 25285670 DOI: 10.1021/am506076r] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanomaterials that integrate functions of imaging and gene delivery have been of great interest due to their potential use in simultaneous diagnosis and therapy. Herein, polycation-b-polysulfobetaine block copolymer, poly[2-(dimethylamino) ethyl methacrylate]-b-poly[N-(3-(methacryloylamino) propyl)-N,N-dimethyl-N-(3-sulfopropyl) ammonium hydroxide] (PDMAEMA-b-PMPDSAH) grafted luminescent carbon dots (CDs) were prepared via surface-initiated atom transfer radical polymerization (ATRP) and investigated as a multifunctional gene delivery system (denoted as CD-PDMA-PMPD) in which the CD cores acted as good multicolor cell imaging probes, the cationic PDMAEMA acted as a DNA condensing agent, and the outer shell of zwitterionic PMPDSAH block protected the vector against nonspecific interactions with serum components. As revealed by the fluorescent spectrum study, the photoluminescent attributes, especially the tunable emission property, were well inherited from the parent CDs. The CD-PDMA-PMPD could condense plasmid DNA into nanospheres with sizes of approximate 50 nm at a proper complex ratio, posing little cytotoxicity at higher ratios. It was shown that the hybrid vector exhibited significantly suppressed BSA protein adsorption and superior hemocompatibility compared to those of the widely used PEI25k. In the in vitro transfection assay, an increased serum concentration from 10 to 50% caused a dramatic drop in PEI25k transfection performance, whereas the transfection efficiency of CD-PDMA-PMPD was well maintained; CD-PDMA80-PMPD40 showed 13 and 28 times higher transfection efficiencies than PEI25k at 30 and 50% serum concentration, respectively. Intriguingly, the carbon dots in the transfected cells displayed excitation-dependent fluorescent emissions, portending that this polycation-polyzwitterion modified CD will be a promising theranostic vector with excellent stealth performance.
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Affiliation(s)
- Lu Cheng
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, China
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192
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Peng Y, Xiong B, Peng L, Li H, He Y, Yeung ES. Recent advances in optical imaging with anisotropic plasmonic nanoparticles. Anal Chem 2014; 87:200-15. [PMID: 25375954 DOI: 10.1021/ac504061p] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yinhe Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University , Changsha, Hunan 410082, P. R. China
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193
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Guan W, Gu W, Ye L, Guo C, Su S, Xu P, Xue M. Microwave-assisted polyol synthesis of carbon nitride dots from folic acid for cell imaging. Int J Nanomedicine 2014; 9:5071-8. [PMID: 25382977 PMCID: PMC4222982 DOI: 10.2147/ijn.s68575] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A green, one-step microwave-assisted polyol synthesis was employed to prepare blue luminescent carbon nitride dots (CNDs) using folic acid molecules as both carbon and nitrogen sources. The as-prepared CNDs had an average size of around 4.51 nm and could be well dispersed in water. Under excitation at 360 nm, the CNDs exhibited a strong blue luminescence and the quantum yield was estimated to be 18.9%, which is greater than that of other reported CNDs. Moreover, the CNDs showed low cytotoxicity and could efficiently label C6 glioma cells, demonstrating their potential in cell imaging.
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Affiliation(s)
- Weiwei Guan
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, People’s Republic of China
| | - Wei Gu
- Department of Chemical Biology, School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing, People’s Republic of China
| | - Ling Ye
- Department of Chemical Biology, School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing, People’s Republic of China
| | - Chenyang Guo
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, People’s Republic of China
| | - Su Su
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, People’s Republic of China
| | - Pinxiang Xu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, People’s Republic of China
- Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing, People’s Republic of China
| | - Ming Xue
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, People’s Republic of China
- Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing, People’s Republic of China
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194
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Qian Z, Shan X, Chai L, Chen J, Feng H. Simultaneous Detection of Multiple DNA Targets by Integrating Dual-Color Graphene Quantum Dot Nanoprobes and Carbon Nanotubes. Chemistry 2014; 20:16065-9. [DOI: 10.1002/chem.201404730] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Indexed: 11/07/2022]
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195
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Sheng Qian Z, Yue Shan X, Jing Chai L, Rong Chen J, Feng H. Dual-colored graphene quantum dots-labeled nanoprobes/graphene oxide: functional carbon materials for respective and simultaneous detection of DNA and thrombin. NANOTECHNOLOGY 2014; 25:415501. [PMID: 25248862 DOI: 10.1088/0957-4484/25/41/415501] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Convenient and simultaneous detection of multiple biomarkers such as DNA and proteins with biocompatible materials and good analytical performance still remains a challenge. Herein, we report the respective and simultaneous detection of DNA and bovine α-thrombin (thrombin) entirely based on biocompatible carbon materials through a specially designed fluorescence on-off-on process. Colorful fluorescence, high emission efficiency, good photostability and excellent compatibility enables graphene quantum dots (GQDs) as the best choice for fluorophores in bioprobes, and thus two-colored GQDs as labeling fluorophores were chemically bonded with specific oligonucleotide sequence and aptamer to prepare two probes targeting the DNA and thrombin, respectively. Each probe can be assembled on the graphene oxide (GO) platform spontaneously by π-π stacking and electrostatic attraction; as a result, fast electron transfer in the assembly efficiently quenches the fluorescence of probe. The presence of DNA or thrombin can trigger the self-recognition between capturing a nucleotide sequence and its target DNA or between thrombin and its aptamer due to their specific hybridization and duplex DNA structures or the formation of apatamer-substrate complex, which is taken advantage of in order to achieve a separate quantitative analysis of DNA and thrombin. A dual-functional biosensor for simultaneous detection of DNA and thrombin was also constructed by self-assembly of two probes with distinct colors and GO platform, and was further evaluated with the presence of various concentrations of DNA and thrombin. Both biosensors serving as a general detection model for multiple species exhibit outstanding analytical performance, and are expected to be applied in vivo because of the excellent biocompatibility of their used materials.
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Affiliation(s)
- Zhao Sheng Qian
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
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196
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Wang X, Cai Q, Zhuang G, Zhong X, Mei D, Li X, Wang J. Geometric and electronic properties of graphene modified by “external” N-containing groups. Phys Chem Chem Phys 2014; 16:20749-54. [DOI: 10.1039/c4cp03069a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to electron transfer fromortho-carbon to nitrogen, theortho-carbon is the most stable binding site between pyridine derivatives and graphene or the catalytic site for a lot of reactions.
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Affiliation(s)
- Xinde Wang
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
| | - Qiuxia Cai
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
| | - Guilin Zhuang
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
| | - Xing Zhong
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
| | - Donghai Mei
- Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - Xiaonian Li
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
| | - Jianguo Wang
- College of Chemical Engineering and Materials Science
- Zhejiang University of Technology
- Hangzhou 310032, P. R. China
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