Synthesis and Characterization of Superhydrophobic, Self-cleaning NIR-reflective Silica Nanoparticles

Deepa, S.; Reed, Ella; Annamalai, Meenakshi; Venkatesan, T.; Valiyaveettil, Suresh

doi:10.1038/srep35993

Cited by 81 publications

(67 citation statements)

References 33 publications

(40 reference statements)

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“…Additionally, the applied protocol for PETES-functionalization resulted in particles that were still dispersible in water but showed better dispersibility in EtOH. Successful functionalization was confirmed by Fourier-transform infrared spectroscopy (FTIR) of lyophilized particles (Supplementary Materials Figure S1), showing weak but characteristic peaks for C-H bonds (2913 cm −1 ) and Si-CH 2 bonds (2983 cm −1 , 785 cm −1 ), in accordance with cited literature [34,35]. The particles were measured at 1 mg mL −1 as used during impregnation.…”

Section: Particle Characterizationsupporting

confidence: 79%

Size and Surface Charge Dependent Impregnation of Nanoparticles in Soft- and Hardwood

et al. 2020

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Recent progress in wood preservative research has led to the use of insoluble copper carbonate in the form of nano- to micron-sized particles in combination with known triazole fungicides to combat fungal decay and thus decrease physical material properties. Evidently, particle-based agents could lead to issues regarding impregnation of a micro-structured material like wood. In this study, we analyzed these limitations via silicon dioxide particles in impregnation experiments of pine and beech wood. In our experiments, we showed that limitations already existed prior to assumed particle size thresholds of 400–600 nm. In pine wood, 70 nm sized particles were efficiently impregnated, in contrast to 170 nm particles. Further we showed that surface functionalized silica nanoparticles have a major impact on the impregnation efficiency. Silica surfaces bearing amino groups were shown to have strong interactions with the wood cell surface, whereas pentyl chains on the SiO2 surfaces tended to lower the particle–wood interaction. The acquired results illustrate an important extension of the currently limited knowledge of nanoparticles and wood impregnation and contribute to future improvements in the field of particle-based wood preservatives.

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Section: Particle Characterizationsupporting

confidence: 79%

Size and Surface Charge Dependent Impregnation of Nanoparticles in Soft- and Hardwood

et al. 2020

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“…This decrease in the nanoparticle size triggered an increase in the surface roughness which in turn increased the contact angle from 44 to 60°. Besides, the increase in contact angle can be attributed to the formation of rough micro-nano-morphological pattern reduction thereby the surface energy of the particles 24 .…”

Section: Resultsmentioning

confidence: 99%

Improved Self-cleaning Properties of an Efficient and Easy to Scale up TiO2 Thin Films Prepared by Adsorptive Self-Assembly

Isaifan

Samara

Suwaileh

et al. 2017

Sci Rep

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Transparent titania coatings have self-cleaning and anti-reflection properties (AR) that are of great importance to minimize soiling effect on photovoltaic modules. In this work, TiO2 nanocolloids prepared by polyol reduction method were successfully used as coating thin films onto borosilicate glass substrates via adsorptive self-assembly process. The nanocolloids were characterized by transmission electron microscopy and x-ray diffraction. The average particle size was around 2.6 nm. The films which have an average thickness of 76.2 nm and refractive index of 1.51 showed distinctive anti soiling properties under desert environment. The film surface topography, uniformity, wettability, thickness and refractive index were characterized using x-ray diffraction, atomic force microscopy, scanning electron microscopy, water contact angle measurements and ellipsometry. The self-cleaning properties were investigated by optical microscopy and UV-Vis spectroscopy. The optical images show 56% reduction of dust deposition rate over the coated surfaces compared with bare glass substrates after 7 days of soiling. The transmission optical spectra of these films collected at normal incidence angle show high anti-reflection properties with the coated substrates having transmission loss of less than 6% compared to bare clean glass.

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“…Piranha causes the removal of contaminants, the generation of -OH groups, and, hence, the hydrophilization of the surface. 70 The drastic decrease in contact angle (by 30.49 ) exhibited that the hydrophobic coating of the as-prepared glass slide became hydrophilic aer 10 min of piranha treatment etching, owing to the surface being le with H-terminals on top of the glass substrate. Aer immersing the piranha-activated glass in aqueous APTMS solution for 2 h, we observed a significant increase in the contact angle to 31.12 .…”

Section: Ultrasonic Synthesis Of Highly Dispersed Au Nanoparticlesmentioning

confidence: 99%

The highly sensitive determination of serotonin by using gold nanoparticles (Au NPs) with a localized surface plasmon resonance (LSPR) absorption wavelength in the visible region

et al. 2020

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Synthesis and Characterization of Superhydrophobic, Self-cleaning NIR-reflective Silica Nanoparticles

Cited by 81 publications

References 33 publications

Size and Surface Charge Dependent Impregnation of Nanoparticles in Soft- and Hardwood

Size and Surface Charge Dependent Impregnation of Nanoparticles in Soft- and Hardwood

Improved Self-cleaning Properties of an Efficient and Easy to Scale up TiO2 Thin Films Prepared by Adsorptive Self-Assembly

The highly sensitive determination of serotonin by using gold nanoparticles (Au NPs) with a localized surface plasmon resonance (LSPR) absorption wavelength in the visible region

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