2007
DOI: 10.1063/1.2753718
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Metal-enhanced superoxide generation: A consequence of plasmon-enhanced triplet yields

Abstract: The authors report significant enhancements in the generation of superoxide for fluorophores in close proximity to silver nanoparticles. A distance dependence study of the fluorophores from the metallic nanostructures, combined with carefully chosen control samples, confirms that the enhancements in superoxide generation are due to plasmon-enhanced triplet yields, a consequence of the distance dependent sensitizer extent of excitation. This observation strongly agrees with current models developed by the autho… Show more

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Cited by 16 publications
(7 citation statements)
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“…•− [78,80]. In a recent study by our lab, ME 1 O 2 was also detected from carbon dots on silvered substrates, shown in Figure 9c [60].…”
Section: Systems Containing Carbon Nanodots With Intrinsic Antimicrobial Character: Key Studies and Considerationsmentioning
confidence: 86%
See 1 more Smart Citation
“…•− [78,80]. In a recent study by our lab, ME 1 O 2 was also detected from carbon dots on silvered substrates, shown in Figure 9c [60].…”
Section: Systems Containing Carbon Nanodots With Intrinsic Antimicrobial Character: Key Studies and Considerationsmentioning
confidence: 86%
“…However, the enhancement of radiative emission could actually run counter to the metal enhancement of ROS (ME-ROS), as radiative decay versus ROS generation are competitive decay pathways for excited carbon dots. Nonetheless, ME-ROS has been detected for small molecule photosensitizers, potentially via enhanced absorption, yielding ME 1 O 2 [ 78 , 79 ] and MEO 2 •− [ 78 , 80 ]. In a recent study by our lab, ME 1 O 2 was also detected from carbon dots on silvered substrates, shown in Figure 9 c [ 60 ].…”
Section: Carbon Nanodots In Hybrid Photodynamic Systemsmentioning
confidence: 99%
“…•À can also be significantly enhanced through close proximity to AgNPs, 45 which can, in turn, further enhance the generation and growth of AgNPs. , the formation of AgNPs should be inhibited in the presence of SOD.…”
Section: àmentioning
confidence: 99%
“…Enhanced chemiluminescence signatures 12 as well as enhanced triplet yields have also been reported from different metallic surfaces, 13 with enhanced triplet yields giving rise to a variety of favorable Reactive Oxygen Photophysics, such as enhanced singlet oxygen and superoxide anion radical generation. 14,15 The wavelength dependence of MEF has also recently been postulated, 16 as well as the angular dependence of emission, 17 the distance dependence of MEF, 18 as well as excitation volumetric effects (EVE), which readily allows for tunable luminescence enhancement factors. Since MEF was defined nearly a decade ago 3 and the mechanism postulated only a few years later, 19 nearly all the reports of MEF have involved the exclusive use of single metallic substrates.…”
Section: Introductionmentioning
confidence: 99%