Ultrabright Fluorescent Silica Nanoparticles Embedded with Conjugated Oligomers and Their Application in Latent Fingerprint Detection.
Shijie ZhangRonghua LiuQianling CuiYu YangQian CaoWenqiang XuLidong LiPublished in: ACS applied materials & interfaces (2017)
Fluorescent micro- and nanosized particles have a broad range of applications in biology, medicine, and engineering. For these uses, the materials should have high emission efficiency and good photostability. However, many organic fluorophores suffer from aggregation-induced quenching effects and photobleaching. Here, we used a simple method based on covalently blending a fluorescent conjugated oligomer with silica nanoparticles to achieve emission quantum yields as high as 97%. The resulting system also showed excellent stability under continuous light illumination, in a range of pH values and temperatures, and in common solvents. This fluorescent material showed outstanding properties, including highly efficient blue emission, low cost, low toxicity, and easy synthesis. Furthermore, its effectiveness for latent fingerprint detection was demonstrated as a proof of concept on various substrates. The obtained emissive fingerprint powder gave good optical/fluorescent images with high contrast and resolution between the ridges and spaces.
Keyphrases
- label free
- quantum dots
- living cells
- highly efficient
- low cost
- randomized controlled trial
- photodynamic therapy
- systematic review
- magnetic resonance
- fluorescent probe
- single molecule
- energy transfer
- deep learning
- ionic liquid
- mass spectrometry
- optical coherence tomography
- machine learning
- contrast enhanced
- water soluble