Fluorescent organosilica micro- and nanoparticles with controllable size

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Organosilica particles are versatile materials with applications in various fields.
• Controlling particle size and doping uniformity is crucial for their performance.
• Existing synthesis methods may have limitations in achieving desired properties.

Purpose of the Study:

• To develop a method for synthesizing uniformly dye-doped organosilica particles.
• To control the size distribution of these particles from nano- to micrometer scale.
• To investigate the swelling behavior of the particles and its impact on dye incorporation.

Main Methods:

• Synthesis of organosilica particles with tunable sizes.
• Characterization of particle size distribution and monodispersity.
• Confocal microscopy to visualize dye distribution.
• Solvent swelling experiments to study internal structure.

Main Results:

• Achieved uniform dye-doping in organosilica particles with narrow size distribution.
• Controlled particle sizes ranging from nanometers to micrometers.
• Observed significant particle swelling in solvents, indicating a gel-like structure.
• Demonstrated efficient dye penetration and uniform doping facilitated by swelling.

Conclusions:

• A novel method for producing uniformly dye-doped organosilica particles was developed.
• Particle swelling is a key factor for effective dye incorporation.
• The proposed coagulation model offers an alternative to conventional Stöber synthesis for organosilica particles.