Multiplexing near‐infrared quantum dot fluorescence through vibrational and electronic transition signatures

We represent how the multiplexing power of near-infrared (NIR) quantum dot (QD) signals can be extended by using narrow NIR absorptive features such as molecular vibration modes and lanthanide f-f electronic transitions. Two distinguishable NIR absorptive films were prepared by using polystyrene and samarium complex, and combined with NIR emitting PbS/CdS Core/Shell QD film to make various NIR emitting codes. Spectral features of NIR emitting codes could be diversified by adjusting the thickness and chemical composition of optical films. © 2023 Korean Chemical Society, Seoul & Wiley-VCH GmbH.11Nsciescopuskc