Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Articles Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite Description An account of the resource Fluorescent organic semiconducting dots (OSDs) with tunable particle size and surface functionality are synthesized from lignite by chemical oxidation method followed by ultra-sonication techniques and dialysis. The defects and oxygen functionalities play a vital role in the photoluminescent property of the synthesized nanoparticles along with quantum confinement effect. These nanomaterials are suitable for imaging and chemical sensing applications as there is no photobleaching and quenching even after a continuous UV exposure of 24 hours and storage of 2 years. The excellent excitation dependent luminescence of the synthesized carbon dots can be utilized for making a low-cost carbon-based sensor for Cu2+ metal ions sensing. The OSDs show good ratiometric fluorescent sensing and can be used as a reliable probe for the detection of Cu2+ ions. They exhibit excellent detection limit of copper ion in acidic solution to a very low concentration of 0.0089 nM. The fluorescent nanodots synthesized from such an abundant and cost-effective precursor exhibiting high copper ion sensitivity is being reported for the first time. 2017 The Author(s). Creator An entity primarily responsible for making the resource Manoj B.; Raj A.M.; Chirayil G.T. Source A related resource from which the described resource is derived Scientific Reports, Vol-7, No. 1 Publisher An entity responsible for making the resource available Nature Publishing Group Date A point or period of time associated with an event in the lifecycle of the resource 2017-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1038/s41598-017-18338-2" target="_blank" rel="noreferrer noopener">https://doi.org/10.1038/s41598-017-18338-2</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038960819&amp;doi=10.1038%2Fs41598-017-18338-2&amp;partnerID=40&amp;md5=96a51a4b19293ef621fda2461f1dbdf9" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038960819&amp;doi=10.1038%2fs41598-017-18338-2&amp;partnerID=40&amp;md5=96a51a4b19293ef621fda2461f1dbdf9</a> Rights Information about rights held in and over the resource All Open Access; Gold Open Access; Green Open Access Relation A related resource ISSN: 20452322; PubMed ID: 29269774 Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Article Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Manoj B., Department of Physics, Christ University, Bengaluru, Karnataka, 560029, India; Raj A.M., Department of Physics, Christ University, Bengaluru, Karnataka, 560029, India; Chirayil G.T., Department of Physics, Christ University, Bengaluru, Karnataka, 560029, India