In Situ Ultraviolet Polymerization Using Upconversion Nanoparticles: Nanocomposite Structures Patterned by Near Infrared Light.
Hongsub JeeGuanying ChenParas N PrasadTymish Y OhulchanskyyJae Hyeong LeePublished in: Nanomaterials (Basel, Switzerland) (2020)
In this paper, we report an approach to polymerization of a nanocomposite containing UV-polymerizable organic material and inorganic, NaYbF4:Tm3+ core-based nanoparticles (NPs), which are optimized for upconversion of near infrared (NIR) to ultraviolet (UV) and blue light. Our approach is compatible with numerous existing UV-polymerizable compositions and the NaYF4: Yb, Tm3+ core-based NPs are much more stable against harsh conditions than NIR organic photo-initiators proposed earlier. The use of a core-shell design for the NPs can provide a suitable method for binding with organic constituents of the nanocomposite, while maintaining efficient NIR-to-UV/blue conversion in the NaYbF4 core. The prepared photopolymerized transparent polymer nanocomposites display upconversion photoluminescence in UV, visible and NIR ranges. We also demonstrate a successful fabrication of polymerized nanocomposite structure with millimeter/submillimeter size uniformly patterned by 980 nm irradiation of inexpensive laser diode through a photomask.
Keyphrases
- photodynamic therapy
- reduced graphene oxide
- aqueous solution
- quantum dots
- light emitting
- fluorescence imaging
- energy transfer
- carbon nanotubes
- drug release
- visible light
- fluorescent probe
- water soluble
- highly efficient
- solid phase extraction
- gold nanoparticles
- drug delivery
- oxide nanoparticles
- radiation therapy
- high resolution
- high speed
- transcription factor