References
- Ai, H. W., K. L. Hazelwood, M. W. Davidson, and R. E. Campbell. 2008. Fluorescent protein FRET pairs for ratiometric imaging of dual biosensors. Nature Methods 5 (5):401–3. doi: https://doi.org/10.1038/Nmeth.1207.
- Akkaya, E. U., and J. R. Lakowicz. 1993. Styryl-based wavelength-ratiometric probes: A new class of fluorescent calcium probes with long wavelength emission and a large Stokes’ shift. Analytical Biochemistry 213 (2):285–9. doi: https://doi.org/10.1006/abio.1993.1422.
- Akkaya, E. U., and J. R. Lakowicz. 1994. Coumarin-based ratiometric fluorescent-probes for Ca2+. Biophysical Journal 66 (2):A162. doi: https://doi.org/10.1016/S0006-3495(94)80820-3.
- Amjadi, M., and R. Jalili. 2017. Molecularly imprinted mesoporous silica embedded with carbon dots and semiconductor quantum dots as a ratiometric fluorescent sensor for diniconazole. Biosensors & Bioelectronics 96:121–6. doi: https://doi.org/10.1016/j.bios.2017.04.045.
- Atabaev, T. S. 2018. Doped carbon dots for sensing and bioimaging applications: A minireview. Nanomaterials 8 (5):342. doi: https://doi.org/10.3390/nano8050342.
- Awaji, T., A. Hirasawa, H. Shirakawa, G. Tsujimoto, and S. Miyazaki. 2001. Novel green fluorescent protein-based ratiometric indicators for monitoring pH in defined intracellular microdomains. Biochemical and Biophysical Research Communications 289 (2):457–62. doi: https://doi.org/10.1006/bbrc.2001.6004.
- Bao, L., C. Liu, Z. L. Zhang, and D. W. Pang. 2015. Photoluminescence-tunable carbon nanodots: Surface-state energy-gap tuning. Advanced Materials (Deerfield Beach, Fla.) 27 (10):1663–7. doi: https://doi.org/10.1002/adma.201405070.
- Bigdeli, A., F. Ghasemi, S. Abbasi-Moayed, M. Shahrajabian, N. Fahimi-Kashani, S. Jafarinejad, M. A. Farahmand Nejad, and M. R. Hormozi-Nezhad. 2019. Ratiometric fluorescent nanoprobes for visual detection: Design principles and recent advances—A review. Analytica Chimica Acta 1079:30–58. doi: https://doi.org/10.1016/j.aca.2019.06.035.
- Burdette, S. C., and S. J. Lippard. 2002. The rhodafluor family. An initial study of potential ratiometric fluorescent sensors for Zn2. +. Inorganic Chemistry 41 (25):6816–23. doi: https://doi.org/10.1021/ic026048q.
- Cao, L., X. Wang, M. J. Meziani, F. S. Lu, H. F. Wang, P. J. G. Luo, Y. Lin, B. A. Harruff, L. M. Veca, D. Murray, et al. 2007. Carbon dots for multiphoton bioimaging. Journal of the American Chemical Society 129 (37):11318–9. doi: https://doi.org/10.1021/ja073527l.
- Carter, E. K., S. Laughlin-Toth, T. Dodd, W. D. Wilson, and I. Ivanov. 2019. Small molecule binders recognize DNA microstructural variations via an induced fit mechanism. Physical Chemistry Chemical Physics: PCCP 21 (4):1841–51. doi: https://doi.org/10.1039/c8cp05537h.
- Carvalho, F. P. 2017. Pesticides, environment, and food safety. Food and Energy Security 6 (2):48–60. doi: https://doi.org/10.1002/fes3.108.
- Chandra, A., and N. Singh. 2017. Biocompatible fluorescent carbon dots for ratiometric intracellular pH sensing. Chemistryselect 2 (20):5723–8. doi: https://doi.org/10.1002/slct.201701012.
- Chen, G. W., F. L. Song, J. Y. Wang, Z. G. Yang, S. G. Sun, J. L. Fan, X. X. Qiang, X. Wang, B. R. Dou, and X. J. Peng. 2012. FRET spectral unmixing: A ratiometric fluorescent nanoprobe for hypochlorite. Chemical Communications (Cambridge, England) 48 (24):2949–51. doi: https://doi.org/10.1039/c2cc17617c.
- Chen, H., Y. J. Xie, A. M. Kirillov, L. L. Liu, M. H. Yu, W. S. Liu, and Y. Tang. 2015. A ratiometric fluorescent nanoprobe based on terbium functionalized carbon dots for highly sensitive detection of an anthrax biomarker. Chemical Communications (Cambridge, England) 51 (24):5036–9. doi: https://doi.org/10.1039/c5cc00757g.
- Chen, S., P. Hou, J. X. Wang, and X. Z. Song. 2012. A highly sulfite-selective ratiometric fluorescent probe based on ESIPT. RSC Advances 2 (29):10869–73. doi: https://doi.org/10.1039/c2ra21471g.
- Chen, S., Y. Jia, G. Y. Zou, Y. L. Yu, and J. H. Wang. 2019. A ratiometric fluorescent nanoprobe based on naphthalimide derivative-functionalized carbon dots for imaging lysosomal formaldehyde in HeLa cells. Nanoscale 11 (13):6377–83. doi: https://doi.org/10.1039/c9nr00039a.
- Collier, B. B., S. Singh, and M. McShane. 2011. Microparticle ratiometric oxygen sensors utilizing near-infrared emitting quantum dots. The Analyst 136 (5):962–7. doi: https://doi.org/10.1039/c0an00661k.
- Coskun, A., and E. U. Akkaya. 2005. Ion sensing coupled to resonance energy transfer: A highly selective and sensitive ratiometric fluorescent chemosensor for Ag(I) by a modular approach. Journal of the American Chemical Society 127 (30):10464–5. doi: https://doi.org/10.1021/ja052574f.
- Dai, C., C. X. Yang, and X. P. Yan. 2015. Ratiometric fluorescent detection of phosphate in aqueous solution based on near infrared fluorescent silver nanoclusters/metal-organic shell composite. Analytical Chemistry 87 (22):11455–9. doi: https://doi.org/10.1021/acs.analchem.5b03086.
- Deo, S., and H. A. Godwin. 2000. A selective, ratiometric fluorescent sensor for Pb2+. Journal of the American Chemical Society 122 (1):174–5. doi: https://doi.org/10.1021/ja992238x.
- Ding, H., S. B. Yu, J. S. Wei, and H. M. Xiong. 2016. Full-color light-emitting carbon dots with a surface-state-controlled luminescence mechanism. ACS Nano 10 (1):484–91. doi: https://doi.org/10.1021/acsnano.5b05406.
- Esteves da Silva, J. C. G., and H. M. R. Goncalves. 2011. Analytical and bioanalytical applications of carbon dots. TrAC - Trends in Analytical Chemistry 30 (8):1327–36. doi: https://doi.org/10.1016/j.trac.2011.04.009.
- Famulok, M. 1999. Oligonucleotide aptamers that recognize small molecules. Current Opinion in Structural Biology 9 (3):324–9. doi: https://doi.org/10.1016/S0959-440X(99)80043-8.
- Fung, F., H. S. Wang, and S. Menon. 2018. Food safety in the 21st century. Biomedical Journal 41 (2):88–95. doi: https://doi.org/10.1016/j.bj.2018.03.003.
- Han, Y., W. Yang, X. Luo, X. He, Y. Yu, C. Li, W. Tang, T. Yue, and Z. Li. 2019. Cu2+-triggered carbon dots with synchronous response of dual emission for ultrasensitive ratiometric fluorescence determination of thiophanate-methyl residues. Journal of Agricultural and Food Chemistry 67 (45):12576–83. doi: https://doi.org/10.1021/acs.jafc.9b04720.
- Hanson, G. T., T. B. McAnaney, E. S. Park, M. E. P. Rendell, D. K. Yarbrough, S. Y. Chu, L. X. Xi, S. G. Boxer, M. H. Montrose, and S. J. Remington. 2002. Green fluorescent protein variants as ratiometric dual emission pH sensors. 1. Structural characterization and preliminary application. Biochemistry 41 (52):15477–88. doi: https://doi.org/10.1021/bi026609p.
- Hao, J., F. F. Liu, N. Liu, M. L. Zeng, Y. H. Song, and L. Wang. 2017. Ratiometric fluorescent detection of Cu2+ with carbon dots chelated Eu-based metal-organic frameworks. Sensors and Actuators B: Chemical 245:641–7. doi: https://doi.org/10.1016/j.snb.2017.02.029.
- He, Y. L., J. L. He, L. Wang, Z. H. Yu, H. R. Zhang, Y. L. Liu, and B. F. Lei. 2017. Synthesis of double carbon dots co-doped mesoporous Al2O3 for ratiometric fluorescent determination of oxygen. Sensors and Actuators B: Chemical 251:918–26. doi: https://doi.org/10.1016/j.snb.2017.05.104.
- Hett, E. C., R. E. Kyne, A. Gopalsamy, M. A. Tones, H. Xu, G. L. Thio, E. Nolan, and L. H. Jones. 2016. Selectivity determination of a small molecule chemical probe using protein microarray and affinity capture techniques. ACS Combinatorial Science 18 (10):611–5. doi: https://doi.org/10.1021/acscombsci.6b00089.
- Hu, K., J. Liu, B. Li, L. L. Liu, S. M. T. Gharibzahedi, Y. Su, Y. N. Jiang, J. L. Tan, Y. K. Wang, and Y. Guo. 2019. Global research trends in food safety in agriculture and industry from 1991 to 2018: A data-driven analysis. Trends in Food Science & Technology 85:262–76. doi: https://doi.org/10.1016/j.tifs.2019.01.011.
- Huang, S., E. L. Yang, J. D. Yao, X. Chu, Y. Liu, Y. Zhang, and Q. Xiao. 2019. Nitrogen, cobalt co-doped fluorescent magnetic carbon dots as ratiometric fluorescent probes for cholesterol and uric acid in human blood serum. ACS Omega 4 (5):9333–42. doi: https://doi.org/10.1021/acsomega.9b00874.
- Huang, X., J. Song, B. C. Yung, X. Huang, Y. Xiong, and X. Chen. 2018. Ratiometric optical nanoprobes enable accurate molecular detection and imaging. Chemical Society Reviews 47 (8):2873–920. doi: https://doi.org/10.1039/C7CS00612H.
- Jaiswal, J. K., and S. M. Simon. 2004. Potentials and pitfalls of fluorescent quantum dots for biological imaging. Trends in Cell Biology 14 (9):497–504. doi: https://doi.org/10.1016/j.tcb.2004.07.012.
- Jalili, R., A. Khataee, M.-R. Rashidi, and R. Luque. 2019. Dual-colored carbon dot encapsulated metal-organic framework for ratiometric detection of glutathione. Sensors and Actuators B: Chemical 297:126775. doi: https://doi.org/10.1016/j.snb.2019.126775.
- Jin, H. J., Y. Q. Liu, T. S. Xu, X. J. Qu, F. K. Bian, and Q. J. Sun. 2016. Quantum dots-ligand complex as ratiometric fluorescent nanoprobe for visual and specific detection of G-Quadruplex. Analytical Chemistry 88 (21):10411–8. doi: https://doi.org/10.1021/acs.analchem.6b01967.
- Jung, H. J., N. Singh, and D. O. Jang. 2008. Highly Fe(3+) selective ratiometric fluorescent probe based on imine-linked benzimidazole. Tetrahedron Letters 49 (18):2960–4. doi: https://doi.org/10.1016/j.tetlet.2008.03.002.
- Kawatani, M., and H. Osada. 2014. Affinity-based target identification for bioactive small molecules. MedChemComm 5 (3):277–87. doi: https://doi.org/10.1039/C3MD00276D.
- Khare, P., A. Bhati, S. R. Anand, Gunture, and S. K. Sonkar. 2018. Brightly fluorescent zinc-doped red-emitting carbon dots for the sunlight-induced photoreduction of Cr(VI) to Cr(III). ACS Omega 3 (5):5187–94. doi: https://doi.org/10.1021/acsomega.8b00047.
- Klisara, N., Y. M. Yu, A. Palaniappan, and B. Liedberg. 2019. Towards on-site visual detection of proteases in food matrices. Analytica Chimica Acta 1078:182–8. doi: https://doi.org/10.1016/j.aca.2019.06.037.
- Krishna, V. D., K. Wu, D. Su, M. C. J. Cheeran, J. P. Wang, and A. Perez. 2018. Nanotechnology: Review of concepts and potential application of sensing platforms in food safety. Food Microbiology 75:47–54. doi: https://doi.org/10.1016/j.fm.2018.01.025.
- Lange, L., and A. S. Meyer. 2019. Potentials and possible safety issues of using biorefinery products in food value chains. Trends in Food Science & Technology 84:7–11. doi: https://doi.org/10.1016/j.tifs.2018.08.016.
- Lehotay, S. J. 2018. Food safety analysis. Analytical and Bioanalytical Chemistry 410 (22):5329–30. doi: https://doi.org/10.1007/s00216-018-1129-0.
- Li, B., H. Ma, B. Zhang, J. Qian, T. Cao, H. T. Feng, W. Li, Y. P. Dong, and W. W. Qin. 2019. Dually emitting carbon dots as fluorescent probes for ratiometric fluorescent sensing of pH values, mercury(II), chloride and Cr(VI) via different mechanisms. Microchimica Acta 186 (6):341. doi: https://doi.org/10.1007/s00604-019-3437-2.
- Li, C. Y., Y. Zhou, Y. F. Li, C. X. Zou, and X. F. Kong. 2013. Efficient FRET-based colorimetric and ratiometric fluorescent chemosensor for Al3+ in living cells. Sensors and Actuators B: Chemical 186:360–6. doi: https://doi.org/10.1016/j.snb.2013.06.039.
- Li, X., S. Zhou, S. Lu, D. Tu, W. Zheng, Y. Liu, R. Li, and X. Chen. 2019. Lanthanide metal-organic framework nanoprobes for the in vitro detection of cardiac disease markers. ACS Applied Materials & Interfaces 11 (47):43989–95. doi: https://doi.org/10.1021/acsami.9b17637.
- Liu, B., and H. Tian. 2005. A selective fluorescent ratiometric chemodosimeter for mercury ion. Chemical Communications (25):3156–8. doi: https://doi.org/10.1039/b501913c.
- Liu, Z. X., Z. L. Wu, M. X. Gao, H. Liu, and C. Z. Huang. 2016. Carbon dots with aggregation induced emission enhancement for visual permittivity detection. Chemical Communications (Cambridge, England) 52 (10):2063–6. doi: https://doi.org/10.1039/c5cc08635c.
- Liu, Z. Y., Y. L. Lu, X. Song, K. Jones, A. J. Sweetman, A. C. Johnson, M. Zhang, X. T. Lu, and C. Su. 2019. Multiple crop bioaccumulation and human exposure of perfluoroalkyl substances around a mega fluorochemical industrial park, China: Implication for planting optimization and food safety. Environment International 127:671–84. doi: https://doi.org/10.1016/j.envint.2019.04.008.
- Lu, Y., and B. Yan. 2014. A ratiometric fluorescent pH sensor based on nanoscale metal-organic frameworks (MOFs) modified by europium(III) complexes. Chemical Communications (Cambridge, England) 50 (87):13323–6. doi: https://doi.org/10.1039/c4cc05508j.
- Lv, M., Y. Liu, J. H. Geng, X. H. Kou, Z. H. Xin, and D. Y. Yang. 2018. Engineering nanomaterials-based biosensors for food safety detection. Biosensors & Bioelectronics 106:122–8. doi: https://doi.org/10.1016/j.bios.2018.01.049.
- Ma, Y. J., G. H. Xu, F. D. Wei, Y. Cen, Y. S. Ma, Y. Y. Song, X. M. Xu, M. L. Shi, S. Muhammad, and Q. Hu. 2017. A dual-emissive fluorescent sensor fabricated by encapsulating quantum dots and carbon dots into metal-organic frameworks for the ratiometric detection of Cu2+ in tap water. Journal of Materials Chemistry C 5 (33):8566–71. doi: https://doi.org/10.1039/C7TC01970J.
- Ma, Y. J., G. H. Xu, F. D. Wei, Y. Cen, X. M. Xu, M. L. Shi, X. Cheng, Y. Y. Chai, M. Sohail, and Q. Hu. 2018. One-pot synthesis of a magnetic, ratiometric fluorescent nanoprobe by encapsulating Fe3O4 magnetic nanoparticles and dual-emissive rhodamine b modified carbon dots in metal-organic framework for enhanced HClO sensing. ACS Applied Materials & Interfaces 10 (24):20801–5. doi: https://doi.org/10.1021/acsami.8b05643.
- Ma, Y. X., Y. L. Chen, J. J. Liu, Y. X. Han, S. D. Ma, and X. G. Chen. 2018. Ratiometric fluorescent detection of chromium(VI) in real samples based on dual emissive carbon dots. Talanta 185:249–57. doi: https://doi.org/10.1016/j.talanta.2018.03.081.
- Manikandan, V. S., B. Adhikari, and A. C. Chen. 2018. Nanomaterial based electrochemical sensors for the safety and quality control of food and beverages. The Analyst 143 (19):4537–54. doi: https://doi.org/10.1039/c8an00497h.
- Mattarozzi, M., F. Bianchi, M. Maffini, F. Vescovi, D. Catellani, M. Suman, and M. Careri. 2019. ESEM-EDS-based analytical approach to assess nanoparticles for food safety and environmental control. Talanta 196:429–35. doi: https://doi.org/10.1016/j.talanta.2018.12.093.
- McBride, D. L. 2019. Safety concerns about food additives and children’s health. Journal of Pediatric Nursing 45:76–7. doi: https://doi.org/10.1016/j.pedn.2018.09.008.
- Medina, S., J. A. Pereira, P. Silva, R. Perestrelo, and J. S. Camara. 2019. Food fingerprints—A valuable tool to monitor food authenticity and safety. Food Chemistry 278:144–62. doi: https://doi.org/10.1016/j.foodchem.2018.11.046.
- Moiseenko, T. I., B. A. Morgunov, N. A. Gashkina, V. V. Megorskiy, and A. A. Pesiakova. 2018. Ecosystem and human health assessment in relation to aquatic environment pollution by heavy metals: Case study of the Murmansk region, northwest of the Kola Peninsula, Russia. Environmental Research Letters 13 (6):065005. doi: https://doi.org/10.1088/1748-9326/aab5d2.
- Nakata, E., Y. Koshi, E. Koga, Y. Katayama, and I. Hamachi. 2005. Double-modification of lectin using two distinct chemistries for fluorescent ratiometric sensing and imaging saccharides in test tube or in cell. Journal of the American Chemical Society 127 (38):13253–61. doi: https://doi.org/10.1021/ja052731a.
- Niu, W. J., D. Shan, R. H. Zhu, S. Y. Deng, S. Cosnier, and X. J. Zhang. 2016. Dumbbell-shaped carbon quantum dots/AuNCs nanohybrid as an efficient ratiometric fluorescent probe for sensing cadmium (II) ions and L-ascorbic acid. Carbon 96:1034–42. doi: https://doi.org/10.1016/j.carbon.2015.10.051.
- Otxoa, A. D. 2018. Nanotechnology and food safety. Nutricion Hospitalaria 35:146–9. doi: https://doi.org/10.20960/nh.2141.
- Pakkath, S. A. R., S. S. Chetty, P. Selvarasu, A. V. Murugan, Y. Kumar, L. Periyasamy, M. Santhakumar, S. R. Sadras, and K. Santhakumar. 2018. Transition metal ion (Mn2+, Fe2+, Co2+, and Ni2+)-doped carbon dots synthesized via microwave-assisted pyrolysis: A potential nanoprobe for magneto-fluorescent dual-modality bioimaging. ACS Biomaterials Science & Engineering 4 (7):2582–96. doi: https://doi.org/10.1021/acsbiomaterials.7b00943.
- Peng, H., Y. Li, C. Jiang, C. Luo, R. Qi, R. Huang, C.-G. Duan, and J. Travas-Sejdic. 2016. Tuning the properties of luminescent nitrogen-doped carbon dots by reaction precursors. Carbon 100:386–94. doi: https://doi.org/10.1016/j.carbon.2016.01.029.
- Pérez-López, B., and A. Merkoçi. 2011. Nanomaterials based biosensors for food analysis applications. Trends in Food Science & Technology 22 (11):625–39. doi: https://doi.org/10.1016/j.tifs.2011.04.001.
- Qu, J. H., Q. Y. Wei, and D. W. Sun. 2018. Carbon dots: Principles and their applications in food quality and safety detection. Critical Reviews in Food Science and Nutrition 58 (14):2466–75. doi: https://doi.org/10.1080/10408398.2018.1437712.
- Reeves, W. R., M. K. McGuire, M. Stokes, and J. L. Vicini. 2019. Assessing the safety of pesticides in food: How current regulations protect human health. Advances in Nutrition (Bethesda, Md.) 10 (1):80–8. doi: https://doi.org/10.1093/advances/nmy061.
- Rong, M. C., X. Z. Deng, S. T. Chi, L. Z. Huang, Y. B. Zhou, Y. N. Shen, and X. Chen. 2018. Ratiometric fluorometric determination of the anthrax biomarker 2,6-dipicolinic acid by using europium(III)-doped carbon dots in a test stripe. Mikrochimica Acta 185 (3):201. doi: https://doi.org/10.1007/S00604-018-2741-6.
- Rong, M. C., Y. C. Liang, D. L. Zhao, B. J. Chen, C. Pan, X. Z. Deng, Y. B. Chen, and J. He. 2018. A ratiometric fluorescence visual test paper for an anthrax biomarker based on functionalized manganese-doped carbon dots. Sensors and Actuators B: Chemical 265:498–505. doi: https://doi.org/10.1016/j.snb.2018.03.094.
- Sankaran, N. B., S. Nishizawa, M. Watanabe, T. Uchida, and N. Teramae. 2005. Designing ratiometric fluorescent sensors for alkali metal ions from simple PET sensors by controlling spacer length. Journal of Materials Chemistry 15 (27–28):2755–61. doi: https://doi.org/10.1039/b500958h.
- Sato, R., Y. Iso, and T. Isobe. 2019. Fluorescence solvatochromism of carbon dot dispersions prepared from phenylenediamine and optimization of red emission. Langmuir 35 (47):15257–66. doi: https://doi.org/10.1021/acs.langmuir.9b02739.
- Shi, X., W. Wei, Z. Fu, W. Gao, C. Zhang, Q. Zhao, F. Deng, and X. Lu. 2019. Review on carbon dots in food safety applications. Talanta 194:809–21. doi: https://doi.org/10.1016/j.talanta.2018.11.005.
- Shiigi, H. 2019. Food safety. Analytical Sciences 35 (3):235–6. doi: https://doi.org/10.2116/analsci.highlights1903.
- Song, Y. H., J. Y. Chen, D. Q. Hu, F. F. Liu, P. Li, H. B. Li, S. H. Chen, H. L. Tan, and L. Wang. 2015. Ratiometric fluorescent detection of biomakers for biological warfare agents with carbon dots chelated europium-based nanoscale coordination polymers. Sensors and Actuators B: Chemical 221:586–92. doi: https://doi.org/10.1016/j.snb.2015.07.008.
- Szekacs, A., M. G. Wilkinson, A. Mader, and B. Appel. 2018. Environmental and food safety of spices and herbs along global food chains. Food Control 83:1–6. doi: https://doi.org/10.1016/j.foodcont.2017.06.033.
- Utochnikova, V. V. 2019. The use of luminescent spectroscopy to obtain information about the composition and the structure of lanthanide coordination compounds. Coordination Chemistry Reviews 398:113006. doi: https://doi.org/10.1016/j.ccr.2019.07.003.
- Vismara, R., G. Tuci, A. Tombesi, K. V. Domasevitch, C. Di Nicola, G. Giambastiani, M. R. Chierotti, S. Bordignon, R. Gobetto, C. Pettinari, et al. 2019. Tuning carbon dioxide adsorption affinity of Zinc(II) MOFs by mixing bis(pyrazolate) ligands with N-containing tags. ACS Applied Materials & Interfaces 11 (30):26956–69. doi: https://doi.org/10.1021/acsami.9b08015.
- Wang, L., H. X. Cao, Y. S. He, C. G. Pan, T. K. Sun, X. Y. Zhang, C. Y. Wang, and G. X. Liang. 2019. Facile preparation of amino-carbon dots/gold nanoclusters FRET ratiometric fluorescent probe for sensing of Pb2+/Cu2. +. Sensors and Actuators B: Chemical 282:78–84. doi: https://doi.org/10.1016/j.snb.2018.11.058.
- Wang, L., H. R. Zhang, X. H. Zhou, Y. L. Liu, and B. F. Lei. 2016. Preparation and characterization of a luminescent carbon dots grafted CaSiO3: Eu3+ phosphor for ratiometric fluorescent oxygen sensing. RSC Advances 6 (101):98554–62. doi: https://doi.org/10.1039/C6RA20380A.
- Wang, L. D., and Y. Chen. 2018. Lanthanide doped carbon dots as a fluorescence chromaticity-based pH probe. Microchimica Acta 185 (10):489. doi: https://doi.org/10.1007/s00604-018-3027-8.
- Wang, L. L., J. Qiao, H. H. Liu, J. Hao, L. Qi, X. P. Zhou, D. Li, Z. X. Nie, and L. Q. Mao. 2014. Ratiometric fluorescent probe based on gold nanoclusters and alizarin red-boronic acid for monitoring glucose in brain microdialysate. Analytical Chemistry 86 (19):9758–64. doi: https://doi.org/10.1021/ac5023293.
- Wang, Q., and Z. M. Yang. 2016. Industrial water pollution, water environment treatment, and health risks in China. Environmental Pollution (Barking, Essex: 1987) 218:358–65. doi: https://doi.org/10.1016/j.envpol.2016.07.011.
- Wang, Y., and T. V. Duncan. 2017. Nanoscale sensors for assuring the safety of food products. Current Opinion in Biotechnology 44:74–86. doi: https://doi.org/10.1016/j.copbio.2016.10.005.
- Wang, Y. F., L. Yang, B. H. Liu, S. M. Yu, and C. L. Jiang. 2018. A colorimetric paper sensor for visual detection of mercury ions constructed with dual-emission carbon dots. New Journal of Chemistry 42 (19):15671–7. doi: https://doi.org/10.1039/C8NJ03683G.
- Wang, Y. H., C. Zhang, X. C. Chen, B. Yang, L. Yang, C. L. Jiang, and Z. P. Zhang. 2016. Ratiometric fluorescent paper sensor utilizing hybrid carbon dots-quantum dots for the visual determination of copper ions. Nanoscale 8 (11):5977–84. doi: https://doi.org/10.1039/c6nr00430j.
- Wang, Y. L., S. Y. Lao, W. J. Ding, Z. D. Zhang, and S. Y. Liu. 2019. A novel ratiometric fluorescent probe for detection of iron ions and zinc ions based on dual-emission carbon dots. Sensors and Actuators B: Chemical 284:186–92. doi: https://doi.org/10.1016/j.snb.2018.12.139.
- Wang, Y. Q., T. Zhao, X. W. He, W. Y. Li, and Y. K. Zhang. 2014. A novel core-satellite CdTe/Silica/Au NCs hybrid sphere as dual-emission ratiometric fluorescent probe for Cu2+. Biosensors & Bioelectronics 51:40–6. doi: https://doi.org/10.1016/j.bios.2013.07.028.
- Wang, Y. Y., J. He, M. D. Zheng, M. D. Qin, and W. Wei. 2019. Dual-emission of Eu based metal-organic frameworks hybrids with carbon dots for ratiometric fluorescent detection of Cr(VI). Talanta 191:519–25. doi: https://doi.org/10.1016/j.talanta.2018.08.078.
- Wen, Z. Q., S. L. Song, T. T. Hu, C. X. Wang, F. D. Qu, P. Wang, and M. H. Yang. 2019. A dual emission nanocomposite prepared from copper nanoclusters and carbon dots as a ratiometric fluorescent probe for sulfide and gaseous H2S. Microchimica Acta 186 (4):258. doi: https://doi.org/10.1007/s00604-019-3295-y.
- Wu, S., H. Min, W. Shi, and P. Cheng. 2020. Multicenter metal-organic framework-based ratiometric fluorescent sensors. Advanced Materials 32 (3):1805871. doi: https://doi.org/10.1002/adma.201805871.
- Xu, L. H., M. F. Pan, G. Z. Fang, and S. Wang. 2019. Carbon dots embedded metal-organic framework@molecularly imprinted nanoparticles for highly sensitive and selective detection of quercetin. Sensors and Actuators B: Chemical 286:321–7. doi: https://doi.org/10.1016/j.snb.2019.01.156.
- Xu, L. L., W. Zhang, L. Shang, R. N. Ma, L. P. Jia, W. L. Jia, H. S. Wang, and L. Niu. 2018. Perylenetetracarboxylic acid and carbon quantum dots assembled synergistic electrochemiluminescence nanomaterial for ultra-sensitive carcinoembryonic antigen detection. Biosensors & Bioelectronics 103:6–11. doi: https://doi.org/10.1016/j.bios.2017.10.035.
- Xu, Q., W. Cai, M. R. Zhang, R. Su, Y. C. Ye, Y. Q. Li, L. P. Zhang, Y. J. Guo, Z. Q. Yu, S. Y. Li, et al. 2018. Photoluminescence mechanism and applications of Zn-doped carbon dots. RSC Advances 8 (31):17254–62. doi: https://doi.org/10.1039/C8RA02756K.
- Xu, X., L. He, Y. W. Long, S. Pan, H. Liu, J. D. Yang, and X. L. Hu. 2019. S-doped carbon dots capped ZnCdTe quantum dots for ratiometric fluorescence sensing of guanine. Sensors and Actuators B: Chemical 279:44–52. doi: https://doi.org/10.1016/j.snb.2018.09.102.
- Xu, X. Y., R. Ray, Y. L. Gu, H. J. Ploehn, L. Gearheart, K. Raker, and W. A. Scrivens. 2004. Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments. Journal of the American Chemical Society 126 (40):12736–7. doi: https://doi.org/10.1021/ja040082h.
- Xu, X. Y., and B. Yan. 2016. Fabrication and application of a ratiometric and colorimetric fluorescent probe for Hg2+ based on dual-emissive metal-organic framework hybrids with carbon dots and Eu3+. Journal of Materials Chemistry C 4 (7):1543–9. doi: https://doi.org/10.1039/C5TC04002G.
- Xu, Y. Y., P. Chen, T. Gao, H. F. Li, and P. F. Yan. 2019. Improved luminescence properties by the self-assembly of lanthanide compounds with a 1-D chain structure for the sensing of CH3COOH and toxic HS− anions. Crystengcomm 21 (39):5965–72. doi: https://doi.org/10.1039/C9CE01077G.
- Xu, Z., A. Rollins, R. Alcala, and R. E. Marchant. 1998. A novel fiber-optic pH sensor incorporating carboxy SNAFL-2 and fluorescent wavelength-ratiometric detection. Journal of Biomedical Materials Research 39 (1):9–15. doi: https://doi.org/10.1002/(Sici)1097-4636(199801)39:1 < 9::Aid-Jbm2 > 3.3.Co;2-7.
- Xu, Z. C., Y. Xiao, X. H. Qian, J. N. Cui, and D. W. Cui. 2005. Ratiometric and selective fluorescent sensor for CuII based on internal charge transfer (ICT). Organic Letters 7 (5):889–92. doi: https://doi.org/10.1021/ol0473445.
- Yan, F. Y., Z. J. Bai, Y. Chen, F. L. Zu, X. Li, J. X. Xu, and L. Chen. 2018. Ratiometric fluorescent detection of copper ions using coumarin-functionalized carbon dots based on FRET. Sensors and Actuators B: Chemical 275:86–94. doi: https://doi.org/10.1016/j.snb.2018.08.034.
- Yan, F. Y., F. L. Zu, J. X. Xu, X. G. Zhou, Z. J. Bai, C. Ma, Y. M. Luo, and L. Chen. 2019. Fluorescent carbon dots for ratiometric detection of curcumin and ferric ion based on inner filter effect, cell imaging and PVDF membrane fouling research of iron flocculants in wastewater treatment. Sensors and Actuators B: Chemical 287:231–40. doi: https://doi.org/10.1016/j.snb.2019.01.144.
- Yang, R. H., W. H. Chan, A. W. M. Lee, P. F. Xia, H. K. Zhang, and K. A. Li. 2003. A ratiometric fluorescent sensor for Ag(I) with high selectivity and sensitivity. Journal of the American Chemical Society 125 (10):2884–5. doi: https://doi.org/10.1021/Ja029253d.
- Yang, T., H. Huang, F. Zhu, Q. Lin, L. Zhang, and J. Liu. 2016. Recent progresses in nanobiosensing for food safety analysis. Sensors (Basel) 16 (7):1118. doi: https://doi.org/10.3390/s16071118.
- Yarur, F., J. R. Macairan, and R. Naccache. 2019. Ratiometric detection of heavy metal ions using fluorescent carbon dots. Environmental Science: Nano 6 (4):1121–30. doi: https://doi.org/10.1039/C8EN01418C.
- Yu, C. M., X. Z. Li, F. Zeng, F. Y. Zheng, and S. Z. Wu. 2013. Carbon-dot-based ratiometric fluorescent sensor for detecting hydrogen sulfide in aqueous media and inside live cells. Chemical Communications (Cambridge, England) 49 (4):403–5. doi: https://doi.org/10.1039/c2cc37329g.
- Yu, H., C. Liu, Y. Li, and A. Huang. 2019. Functionalized metal-organic framework UiO-66-NH-BQB for selective detection of hydrogen sulfide and cysteine. ACS Applied Materials & Interfaces 11 (45):41972–8. doi: https://doi.org/10.1021/acsami.9b16529.
- Zeng, X. D., X. L. Zhang, B. C. Zhu, H. Y. Jia, W. Yang, Y. M. Li, and J. Xue. 2011. A colorimetric and ratiometric fluorescent probe for quantitative detection of GSH at physiologically relevant levels. Sensors and Actuators B: Chemical 159 (1):142–7. doi: https://doi.org/10.1016/j.snb.2011.06.062.
- Zhang, L. B., and E. K. Wang. 2014. Metal nanoclusters: New fluorescent probes for sensors and bioimaging. Nano Today 9 (1):132–57. doi: https://doi.org/10.1016/j.nantod.2014.02.010.
- Zhang, L.-J., Z.-Y. Wang, X.-J. Cao, J.-T. Liu, and B.-X. Zhao. 2016. An effective ICT-based and ratiometric fluorescent probe for sensing sulfit. Sensors and Actuators B: Chemical 236:741–8. doi: https://doi.org/10.1016/j.snb.2016.06.055.
- Zhang, S. M., B. X. Lin, Y. Yu, Y. J. Cao, M. L. Guo, and L. L. Shui. 2018. A ratiometric nanoprobe based on silver nanoclusters and carbon dots for the fluorescent detection of biothiols. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 195:230–5. doi: https://doi.org/10.1016/j.saa.2018.01.078.
- Zhang, W. J., S. G. Liu, L. Han, H. Q. Luo, and N. B. Li. 2019. A ratiometric fluorescent and colorimetric dual-signal sensing platform based on N-doped carbon dots for selective and sensitive detection of copper (II) and pyrophosphate ion. Sensors and Actuators B: Chemical 283:215–21. doi: https://doi.org/10.1016/j.snb.2018.12.012.
- Zhao, J. J., M. J. Huang, L. L. Zhang, M. B. Zou, D. X. Chen, Y. Huang, and S. L. Zhao. 2017. Unique approach to develop carbon dot-based nanohybrid near-infrared ratiometric fluorescent sensor for the detection of mercury ions. Analytical Chemistry 89 (15):8044–9. doi: https://doi.org/10.1021/acs.analchem.7b01443.
- Zhou, Y., K. J. Mintz, S. K. Sharma, and R. M. Leblanc. 2019. Carbon dots: Diverse preparation, application, and perspective in surface chemistry. Langmuir 35 (28):9115–32. doi: https://doi.org/10.1021/acs.langmuir.9b00595.
- Zhu, A. W., Q. Qu, X. L. Shao, B. Kong, and Y. Tian. 2012. Carbon-dot-based dual-emission nanohybrid produces a ratiometric fluorescent sensor for in vivo imaging of cellular copper ions. Angewandte Chemie (International ed. in English) 51 (29):7185–9. doi: https://doi.org/10.1002/anie.201109089.
- Zhu, P. P., Z. Cheng, L. L. Du, Q. Chen, and K. J. Tan. 2018. Synthesis of the Cu-doped dual-emission fluorescent carbon dots and its analytical application. Langmuir 34 (34):9982–9. doi: https://doi.org/10.1021/acs.langmuir.8b01230.
- Zhu, S. J., Q. N. Meng, L. Wang, J. H. Zhang, Y. B. Song, H. Jin, K. Zhang, H. C. Sun, H. Y. Wang, and B. Yang. 2013. Highly photoluminescent carbon dots for multicolor patterning, sensors, and bioimaging. Angewandte Chemie (International ed. in English) 52 (14):3953–7. doi: https://doi.org/10.1002/anie.201300519.