Micro- and sub-nanosecond lifetime measurements using a UV light-emitting diode
Micro- and sub-nanosecond lifetime measurements using a UV light-emitting diode
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DOI：
10.1366/0003702001948187
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发表时间：
2000-01-01
影响因子：
3.5
通讯作者：
Chang, Q
中科院分区：
文献类型：
--
作者：
Szmacinski, H;Chang, Q
作者描述了使用紫外线发光二极管（UV LED）， Nichia NSHU590E，作为荧光寿命测量的373nm激发光源。选择了一种频域技术来证明紫外LED可以通过在10 kHz到330 MHz的调制频率范围内驱动射频信号来有效地进行强度调制。时间分辨测量是通过使用寿命非常长的10.2 μ s荧光团和寿命非常短的0.15 ns荧光团进行的。讨论了led在基于寿命的化学传感中的应用。
The authors describe the use of an ultraviolet light-emitting diode (UV LED), Nichia NSHU590E, as a 373 nm excitation light source for fluorescence lifetime measurements. A frequency-domain technique has been chosen to demonstrate that the UV LED can be efficiently intensity modulated by driving the radio-frequency signal over a range of modulation frequencies from 10 kHz up to 330 MHz. Time-resolved measurements have been performed by using a fluorophore with a very long lifetime of 10.2 mu s and fluorophore with a very short lifetime of 0.15 ns. Application of LEDs for lifetime-based chemical sensing is discussed.