Fluorescence light-emitting diodes LEDs

The complete optical setup of induced fluorescence involves an excitation part and an emission part. The intersection point of the two parts is the detection window in the microdevice. The excitation part starts from the light source and ends at the microdevice, while the emission part originates from the microdevice and stops at the detector. In free-space fluorescence detection, the common excitation sources include the laser, light-emitting diode (LED), and mercury or xenon arc lamp, and each light source has its distinctive spectroscopic property and practical benefits. Laser-induced fluorescence (LIE) is a highly sensitive optical detection method and is able to perform even single molecule detection. LIE has been introduced into the... 

Actually, light-emitting diode (LED)-induced fluorescence is also called LIF and widely integrated with microfluidics to obtain the same detection as laser-induced fluorescence. In addition, LIF-adopted LED exhibited extreme potential in microfluidics coupled with LIF owing to its mini-size, low price, and easily portable integration with microfluidics. 

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