光激发金纳米棒对顺磁弛豫的增强作用。
Enhancement of Paramagnetic Relaxation by Photoexcited Gold Nanorods.
作者信息
Wen Tao, Wamer Wayne G, Subczynski Witold K, Hou Shuai, Wu Xiaochun, Yin Jun-Jie
机构信息
Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park 20740, MD, USA.
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, P. R. China.
出版信息
Sci Rep. 2016 Apr 13;6:24101. doi: 10.1038/srep24101.
Electron spin resonance (ESR) spectroscopy was used to investigate the switchable, light-dependent effects of gold nanorods (GNRs) on paramagnetic properties of nitroxide spin probes. The photoexcited GNRs enhanced the spin-spin and spin-lattice relaxations of nitroxide spin probes. It was shown that molecular oxygen plays the key role in this process. Our results demonstrate that ESR is a powerful tool for investigating the events following photoexcitation of GNRs. The novel light-controlled effects observed for GNRs on paramagnetic properties and activities of surrounding molecules have a number of significant applications where oxygen sensing and oxygen activity is important.
电子自旋共振（ESR）光谱法被用于研究金纳米棒（GNRs）对氮氧化物自旋探针顺磁性质的可切换、光依赖效应。光激发的GNRs增强了氮氧化物自旋探针的自旋-自旋和自旋-晶格弛豫。结果表明，分子氧在这一过程中起关键作用。我们的结果表明，ESR是研究GNRs光激发后事件的有力工具。观察到的GNRs对周围分子顺磁性质和活性的新型光控效应在氧传感和氧活性很重要的许多重要应用中具有重要意义。
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