Kim, Eunkyeom Kyhm, Jihoon Kim, Jung Hyuk Lee, Gi Yong Ko, Doo-Hyun Han, Il Ki Ko, Hyungduk 2024-01-20T11:03:05Z 2024-01-20T11:03:05Z 2021-09-05 2013-11-19 2045-2322 https://pubs.kist.re.kr/handle/201004/127434 This paper reports for the first time the luminescent property of polystyrene (PS), produced by pulsed ultra violet laser irradiation. We have discovered that, in air, ultra-violet (UV) irradiated PS nanospheres emit bright white light with the dominant peak at 510 nm, while in vacuum they emit in the near-blue region. From the comparison of PS nanospheres irradiated in vacuum and air, we suggest that the white luminescence is due to the formation of carbonyl groups on the surface of PS by photochemical oxidation. Our results potentially offer a new route and strategy for white light sources. English NATURE PUBLISHING GROUP ELECTROLUMINESCENT DEVICES RECENT ADVANCEMENTS EMITTING DEVICES ENERGY-TRANSFER LAYER DIODES White light emission from polystyrene under pulsed ultra violet laser irradiation Article 10.1038/srep03253 1 SCIENTIFIC REPORTS, v.3 SCIENTIFIC REPORTS 3 scie scopus 000327515700005 2-s2.0-84888154557 Multidisciplinary Sciences Science & Technology - Other Topics Article ELECTROLUMINESCENT DEVICES RECENT ADVANCEMENTS EMITTING DEVICES ENERGY-TRANSFER LAYER DIODES Lasers LEDs and light sources Optical materials and structures