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Sensitive fluorescence detection of mercury(ii) in aqueous solution by the fluorescence quenching effect of MoS2 with DNA functionalized carbon dots
A rapid and sensitive fluorescent sensor based on the MoS2 nanosheet/DNA/carbon dot nanoassembly has been developed towards the detection of mercury(ii) present in environmental samples. Bio-carbon dots (CDs) having strong fluorescence maxima at 451 nm were synthesized via one-step treatment with ho...
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Published in: | Analyst (London) 2016-11, Vol.141 (22), p.6344-6352 |
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creator | Srinivasan, K Subramanian, K Murugan, K Dinakaran, K |
description | A rapid and sensitive fluorescent sensor based on the MoS2 nanosheet/DNA/carbon dot nanoassembly has been developed towards the detection of mercury(ii) present in environmental samples. Bio-carbon dots (CDs) having strong fluorescence maxima at 451 nm were synthesized via one-step treatment with honey under low temperature carbonization. These CDs were nearly spherical with good size distribution and excellent monodispersity, and the average sizes of CD were around 2-4 nm as evidenced from transmission electron microscopy. The conjugation of DNA strands on the surface of the carbon dots provided an efficient fluorescent probe. The fluorescence of the MoS2 nanosheet/DNA/carbon dot nanoassembly enhanced gradually with the increase in the concentration of Hg2+ ions and the detection limit was found to be 1.02 nM. Furthermore, the fluorescence intensity was found to be linear with the concentration of Hg2+ ions in the range from 0 to 10 nM and their respective coefficient of determination was found to be 0.93676 and 0.98178. The present MoS2 nanosheet/DNA/carbon dot nanoassembly is highly selective toward Hg2+ ions over a wide range of metal ions tested. |
doi_str_mv | 10.1039/c6an00879h |
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Bio-carbon dots (CDs) having strong fluorescence maxima at 451 nm were synthesized via one-step treatment with honey under low temperature carbonization. These CDs were nearly spherical with good size distribution and excellent monodispersity, and the average sizes of CD were around 2-4 nm as evidenced from transmission electron microscopy. The conjugation of DNA strands on the surface of the carbon dots provided an efficient fluorescent probe. The fluorescence of the MoS2 nanosheet/DNA/carbon dot nanoassembly enhanced gradually with the increase in the concentration of Hg2+ ions and the detection limit was found to be 1.02 nM. Furthermore, the fluorescence intensity was found to be linear with the concentration of Hg2+ ions in the range from 0 to 10 nM and their respective coefficient of determination was found to be 0.93676 and 0.98178. 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Bio-carbon dots (CDs) having strong fluorescence maxima at 451 nm were synthesized via one-step treatment with honey under low temperature carbonization. These CDs were nearly spherical with good size distribution and excellent monodispersity, and the average sizes of CD were around 2-4 nm as evidenced from transmission electron microscopy. The conjugation of DNA strands on the surface of the carbon dots provided an efficient fluorescent probe. The fluorescence of the MoS2 nanosheet/DNA/carbon dot nanoassembly enhanced gradually with the increase in the concentration of Hg2+ ions and the detection limit was found to be 1.02 nM. Furthermore, the fluorescence intensity was found to be linear with the concentration of Hg2+ ions in the range from 0 to 10 nM and their respective coefficient of determination was found to be 0.93676 and 0.98178. The present MoS2 nanosheet/DNA/carbon dot nanoassembly is highly selective toward Hg2+ ions over a wide range of metal ions tested.</description><subject>Carbon</subject><subject>Deoxyribonucleic acid</subject><subject>Fluorescence</subject><subject>Maxima</subject><subject>Mercury (metal)</subject><subject>Molybdenum disulfide</subject><subject>Nanoparticles</subject><subject>Nanostructure</subject><issn>0003-2654</issn><issn>1364-5528</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNkLtOwzAUhi0EEqWw8AQeyxDwNbHHqlylAkNhrhzHJkapXWIHVJ6DB8YtTExMR0f69J3__ACcYnSOEZUXulQeIVHJdg-MMC1ZwTkR-2CEEKIFKTk7BEcxvuYVI45G4GthfHTJvRtouyH0JmrjtYGNSUYnFzwMFq5Mr4d-M3HuDDoP1dtgwhBhDN2wQ-oNTO0fQWa8bp1_gcbarNp67sOCwA-XWnj5MIV28LsLqnOfpoFa9XV2NSHFY3BgVRfNye8cg-frq6fZbTF_vLmbTefFmhKWCsGwxFIarKQuLcO2QRZVNRWV4KhmpdXSoLIhnFDd1JRKzJtaV5TyXAZFio7B5Me77kPOG9Ny5XL8rlN---ASC85pKSqC_4EywjGtBPoHSpmUlGT3N3BVhss</recordid><startdate>20161121</startdate><enddate>20161121</enddate><creator>Srinivasan, K</creator><creator>Subramanian, K</creator><creator>Murugan, K</creator><creator>Dinakaran, K</creator><scope>7X8</scope><scope>7TM</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20161121</creationdate><title>Sensitive fluorescence detection of mercury(ii) in aqueous solution by the fluorescence quenching effect of MoS2 with DNA functionalized carbon dots</title><author>Srinivasan, K ; Subramanian, K ; Murugan, K ; Dinakaran, K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p324t-8419199e1a9c6f41fd0f07b387850b46fc9e06d2523cdb33915dbc733500330a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Carbon</topic><topic>Deoxyribonucleic acid</topic><topic>Fluorescence</topic><topic>Maxima</topic><topic>Mercury (metal)</topic><topic>Molybdenum disulfide</topic><topic>Nanoparticles</topic><topic>Nanostructure</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Srinivasan, K</creatorcontrib><creatorcontrib>Subramanian, K</creatorcontrib><creatorcontrib>Murugan, K</creatorcontrib><creatorcontrib>Dinakaran, K</creatorcontrib><collection>MEDLINE - Academic</collection><collection>Nucleic Acids Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Analyst (London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Srinivasan, K</au><au>Subramanian, K</au><au>Murugan, K</au><au>Dinakaran, K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sensitive fluorescence detection of mercury(ii) in aqueous solution by the fluorescence quenching effect of MoS2 with DNA functionalized carbon dots</atitle><jtitle>Analyst (London)</jtitle><date>2016-11-21</date><risdate>2016</risdate><volume>141</volume><issue>22</issue><spage>6344</spage><epage>6352</epage><pages>6344-6352</pages><issn>0003-2654</issn><eissn>1364-5528</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>A rapid and sensitive fluorescent sensor based on the MoS2 nanosheet/DNA/carbon dot nanoassembly has been developed towards the detection of mercury(ii) present in environmental samples. Bio-carbon dots (CDs) having strong fluorescence maxima at 451 nm were synthesized via one-step treatment with honey under low temperature carbonization. These CDs were nearly spherical with good size distribution and excellent monodispersity, and the average sizes of CD were around 2-4 nm as evidenced from transmission electron microscopy. The conjugation of DNA strands on the surface of the carbon dots provided an efficient fluorescent probe. The fluorescence of the MoS2 nanosheet/DNA/carbon dot nanoassembly enhanced gradually with the increase in the concentration of Hg2+ ions and the detection limit was found to be 1.02 nM. Furthermore, the fluorescence intensity was found to be linear with the concentration of Hg2+ ions in the range from 0 to 10 nM and their respective coefficient of determination was found to be 0.93676 and 0.98178. The present MoS2 nanosheet/DNA/carbon dot nanoassembly is highly selective toward Hg2+ ions over a wide range of metal ions tested.</abstract><doi>10.1039/c6an00879h</doi><tpages>9</tpages></addata></record> |
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subjects | Carbon Deoxyribonucleic acid Fluorescence Maxima Mercury (metal) Molybdenum disulfide Nanoparticles Nanostructure |
title | Sensitive fluorescence detection of mercury(ii) in aqueous solution by the fluorescence quenching effect of MoS2 with DNA functionalized carbon dots |
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