Photoluminescent Silica Nanostructures and Nanohybrids

Abstract

The complicated photophysics of wide variety of defects existing in silica (SiO 2 ) layer of nanometer thickness determines widespread photoluminescence bands of Si/SiO 2 based system as well as SiO 2 nanoparticles (NPs) for their applications in photovoltaic and optoelectronic devices. This review attempts to summarize different photophysical processes in pure SiO 2 NPs. Moreover, these NPs also act as scaffolds for various guest molecules to perform their specific functions. Guest fluorophore molecules when trapped inside pores of SiO 2 NPs exhibit a different photodynamics than free state, which opens up several important applications of hybrid SiO 2 NPs in artificial photosynthesis, sensing, biology and optical fiber.

Efficient Inactivation of Enveloped Viruses Using a Nanoparticle-Based Photodynamic Method

“…Silica nanoparticles were selected in this study due to their exceptional optical transparency and robust structural stability, rendering them highly suitable for encapsulating and safeguarding photosensitizer molecules . Moreover, their remarkable biocompatibility has positioned them as a preferred choice for various biomedical research endeavors, serving effectively as carriers in these applications. , Meanwhile, they can be complex with diverse polymers and paintings on daily life surfaces. , These features make SiO 2 nanoparticles a fundamental material that might be universal for the diverse scenario of interrupting spreading chains.…”

Heterogeneous Electrocatalytic Oxygen Evolution Reaction by a Sol‐Gel Electrode with Entrapped Na3[Ru2(μ‐CO3)4]: The Effect of NaHCO3

“…[49,[65][66][67][68][69][70][71][72][73][74][75][76][77][78][79] Moreover, large variety of reagents can be entrapped in the matrices produced using the sol-gel process. [49,67,68,[78][79][80][81][82][83][84][85] Previous studies by Avnir et al, [86][87][88][89][90] Shamir et al [68] and Aharon et al [49] showed that catalyst entrapment in a sol-gel often increases the efficiency of the active species relative to its activity in homogenous catalysis. Considering all these factors, we applied the sol-gel process to entrap Na 3 [Ru 2 (μ-CO 3 ) 4 ] [2] for use as a heterogeneous electrocatalyst.…”

“…The main advantage of the sol‐gel process is its ease of adaptability as the properties of sol‐gel matrices (e. g., porosity, particle size and surface area) can be easily and inexpensively controlled by changing the matric preparation conditions [49,65–79] . Moreover, large variety of reagents can be entrapped in the matrices produced using the sol‐gel process [49,67,68,78–85] . Previous studies by Avnir et al., [86–90] Shamir et al [68] .…”