1. Non-conjugated organosilicone fluorescent nanoparticles for latent fingerprint detection
- Author
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Jiahui Wang, Duxia Cao, Hao Zhang, Ruifang Guan, Nie Chen, Xuezhe Dong, Qifeng Chen, and Jiajian You
- Subjects
Materials science ,education ,Biophysics ,Quantum yield ,02 engineering and technology ,Conjugated system ,010402 general chemistry ,01 natural sciences ,Biochemistry ,chemistry.chemical_compound ,Resolution (electron density) ,technology, industry, and agriculture ,General Chemistry ,respiratory system ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Small molecule ,Fluorescence ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry ,Chemical engineering ,Covalent bond ,Siloxane ,Particle size ,0210 nano-technology - Abstract
In this paper, non-conjugated organosilicone fluorescent nanoparticles (Si-NPs) were synthesized by the Stober method. The Si-NPs have a diameter of approximately 30 nm, uniform particle size, and a quantum yield of up to 70.6% ultra-bright blue light emission. The prepared non-conjugated siloxane fluorescent small molecule is covalently bonded to the silica matrix. The Si-NPs exhibited excellent stability in ultraviolet irradiation and a wide pH range, and their improved stable optical properties are attributable to the protection of the silica matrix. In addition, the effectiveness of Si-NPs for potential fingerprint detection on a variety of substrates is demonstrated. Clear optical/fluorescent images of the ridges and spaces with high contrast and resolution are obtained because the particle size of the obtained Si-NPs is much smaller than the width of the fingerprint ridges.
- Published
- 2019
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