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Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis
In this work we performed a detailed investigation of the photostability of bottom-up produced carbon nanodots (CDs) prepared from citric acid and urea by solvothermal synthesis. Analytical ultracentrifugation (AUC) reveals that the CDs have a hydrodynamic diameter of
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Published in: | Physical chemistry chemical physics : PCCP 2016, Vol.18 (1), p.466-475 |
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container_title | Physical chemistry chemical physics : PCCP |
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creator | Wang, Wenshuo Damm, Cornelia Walter, Johannes Nacken, Thomas J Peukert, Wolfgang |
description | In this work we performed a detailed investigation of the photostability of bottom-up produced carbon nanodots (CDs) prepared from citric acid and urea by solvothermal synthesis. Analytical ultracentrifugation (AUC) reveals that the CDs have a hydrodynamic diameter of |
doi_str_mv | 10.1039/c5cp04942c |
format | article |
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Analytical ultracentrifugation (AUC) reveals that the CDs have a hydrodynamic diameter of <1 nm and a very narrow size distribution. In the community it is widely assumed that CDs are photo-stable. In contrast, we found that CDs exposed to UV-irradiation exhibit noteworthy fluorescence degeneration compared to freshly prepared CDs or CDs stored in the dark, indicating that fluorescence bleaching is caused by a photochemical process. We found that fluorescence intensity decay due to exposure to UV-irradiation is accelerated in the presence of oxygen and identified the surface status of CDs as the decisive factor of fluorescence bleaching of CDs. 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Based on a discussion on the underlying mechanisms we show how to avoid photobleaching of CDs.</description><subject>Bleaching</subject><subject>Carbon</subject><subject>Decay</subject><subject>Exposure</subject><subject>Fluorescence</subject><subject>Nanostructure</subject><subject>Stabilization</subject><subject>Synthesis</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMo7rp68QdIjiJUk-arOUpZP2DBPajXkiZTt9I2a9MK6683uutePc0L8_DO8CB0Tsk1JUzfWGHXhGue2gM0pVyyRJOMH-6zkhN0EsI7IYQKyo7RJJWSSqHUFL0uV37wZQPGruruDZvO4TCYsm7qLzPUvsO-wtb0ZUyd6bzzQ8Dr3rvRgsPlBgfffPphBX1rGhw2XYyhDqfoqDJNgLPdnKGXu_lz_pAsnu4f89tFYrnQQwJCZaABjJKVFcpoJQhAKpirrM6sLkETmRpJ4opLkfJ4VDnqnCWgmcnYDF1ue-NLHyOEoWjrYKFpTAd-DAXNqCREa0H-R-NtzoSKhmboaova3ofQQ1Ws-7o1_aagpPhRXuQiX_4qzyN8sesdyxbcHv1zzL4B88p9dw</recordid><startdate>2016</startdate><enddate>2016</enddate><creator>Wang, Wenshuo</creator><creator>Damm, Cornelia</creator><creator>Walter, Johannes</creator><creator>Nacken, Thomas J</creator><creator>Peukert, Wolfgang</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>2016</creationdate><title>Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis</title><author>Wang, Wenshuo ; Damm, Cornelia ; Walter, Johannes ; Nacken, Thomas J ; Peukert, Wolfgang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c459t-e578e9eea76fc57a9750ee253dfc98c9be9062a607a946524ced7d1ddc0e93a83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Bleaching</topic><topic>Carbon</topic><topic>Decay</topic><topic>Exposure</topic><topic>Fluorescence</topic><topic>Nanostructure</topic><topic>Stabilization</topic><topic>Synthesis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Wenshuo</creatorcontrib><creatorcontrib>Damm, Cornelia</creatorcontrib><creatorcontrib>Walter, Johannes</creatorcontrib><creatorcontrib>Nacken, Thomas J</creatorcontrib><creatorcontrib>Peukert, Wolfgang</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</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>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Wenshuo</au><au>Damm, Cornelia</au><au>Walter, Johannes</au><au>Nacken, Thomas J</au><au>Peukert, Wolfgang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2016</date><risdate>2016</risdate><volume>18</volume><issue>1</issue><spage>466</spage><epage>475</epage><pages>466-475</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>In this work we performed a detailed investigation of the photostability of bottom-up produced carbon nanodots (CDs) prepared from citric acid and urea by solvothermal synthesis. 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subjects | Bleaching Carbon Decay Exposure Fluorescence Nanostructure Stabilization Synthesis |
title | Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis |
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