Enhancing anti-reflective and hydrophobic properties of glass surfaces by nanostructuration and grafting of saturated carbon chains

Kermad, Amina; Hassani, Amel; Hadjaj, Nesrine; Sam, S.; Belaid, Sabrina; Kaci, S.; Touati, Yousseuf; Belhouse, Samia; Manseri, A.; Mennari, Hamid; Belkhiri, Sabrina; Hamrani, Amel; Lasmi, Kahina

doi:10.1016/j.apsusc.2019.144843

Cited by 6 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the improved transmittance directly depends on the porosity and the graded RI of the structured surface. 37 For taller nanostructures, P changes smoothly and incoming light will experience a gradient change through the structure and will be partially reflected by the neighbor structures. Meanwhile, the destructive interference of the taller structures will lead to reduced reflection for wide-angle incident lights and the magnitude of partial reflection will not increase rapidly for the thin-film interfaces.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…According to the Lorentz–Lorenz relation, the RI of the coating is related to the porosity of the structured surface where P is the fractional porosity, n air is the RI of air ( n = 1), n p is the RI of the porous film, and n s is the RI of the solid film. Therefore, the improved transmittance directly depends on the porosity and the graded RI of the structured surface . For taller nanostructures, P changes smoothly and incoming light will experience a gradient change through the structure and will be partially reflected by the neighbor structures.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Double-Sided, Omnidirectional γ-AlOOH Hierarchical Nanostructures: Imparting Enhanced Antireflective Properties with Self-Cleaning Capacity for Optical Devices

et al. 2021

View full text Add to dashboard Cite

Herein, we have successfully developed an integrated strategy to develop antireflective coatings with self-cleaning capabilities based on periodic double-sided photonic γ-AlOOH nanostructures to transmit maximum incident light photons. Interfacial reflections are instinctive and one of the fundamental phenomena occurring at interfaces owing to refractive index mismatch. The eradication of such undesirable light reflection is of significant consideration in many optical devices. A systematic approach was carried out to eradicate surface reflection and enhance optical transmission by tailored γ-AlOOH nanostructures. The γ-AlOOH photonic nanostructures with subwavelength features exhibited a gradient index, which almost eliminated the refractive index mismatch at the interface. Optical transmittance of 97% was achieved in the range of 350–800 nm at normal incidence compared to uncoated glass (89%). A multilayer model approach was adopted to extract the effective refractive index of the coating, which showed a graded index from the top to the bottom surface. Further, to fully comprehend the optics of these nanostructures, the omnidirectional (20–70°) antireflective property has been explored using variable-angle specular reflectance spectroscopy. The hierarchical γ-AlOOH nanostructures exhibited only ∼1.3% reflectance at the lower incident angle in the visible spectra and an average reflectance of ∼7.6% up to an incident angle of 70°. Moreover, the hierarchical nanostructures manifested contact angle (CA) >172° and roll-off angle (RA) <1° with excellent self-cleaning performance. Furthermore, the abrasion resistance of the coating is discussed in detail, which displayed a good resistance against sand erosion. Significantly, the photovoltaic performance of the coated modules exhibited a relative enhancement of ∼17% in efficiency, which is attributed to the efficient coupling of light rays. Thus, the integration of the antireflection (AR) property with self-cleaning ability can provide a cost-effective energy solution for optoelectronic devices, display devices, and thin-film optics.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Double-Sided, Omnidirectional γ-AlOOH Hierarchical Nanostructures: Imparting Enhanced Antireflective Properties with Self-Cleaning Capacity for Optical Devices

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Mostly, conventional transparent surfaces do not meet all their application requirements. To improve the properties and performance of traditional transparent materials, one approach is to modify the surface [ 6 , 7 , 8 , 9 ]. Various methods have been adopted to achieve enhanced surface characteristics including ion exchange [ 10 ], gas treatment [ 11 ], or by means of thin film coating [ 12 , 13 , 14 , 15 ], which were well elaborated in the literature.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Transparent and Scratch-Proof Yttrium/Sialon Thin Films

et al. 2020

View full text Add to dashboard Cite

Transparent and amorphous yttrium (Y)/Sialon thin films were successfully fabricated using pulsed laser deposition (PLD). The thin films were fabricated in three steps. First, Y/Sialon target was synthesized using spark plasma sintering technique at 1500 °C in an inert atmosphere. Second, the surface of the fabricated target was cleaned by grinding and polishing to remove any contamination, such as graphite and characterized. Finally, thin films were grown using PLD in an inert atmosphere at various substrate temperatures (RT to 500 °C). While the X-ray diffractometer (XRD) analysis revealed that the Y/Sialon target has β phase, the XRD of the fabricated films showed no diffraction peaks and thus confirming the amorphous nature of fabricated thin films. XRD analysis displayed that the fabricated thin films were amorphous while the transparency, measured by UV-vis spectroscopy, of the films, decreased with increasing substrate temperature, which was attributed to a change in film thickness with deposition temperature. X-ray photoelectron spectroscopy (XPS) results suggested that the synthesized Y/Sialon thin films are nearly homogenous and contained all target’s elements. A scratch test revealed that both 300 and 500 °C coatings possess the tough and robust nature of the film, which can resist much harsh loads and shocks. These results pave the way to fabricate different Sialon doped materials for numerous applications.

show abstract

Colloidal assembly to antireflection coatings

Leverant

Gao

Nguyen

et al. 2023

Encyclopedia of Nanomaterials

View full text Add to dashboard Cite

Enhancing anti-reflective and hydrophobic properties of glass surfaces by nanostructuration and grafting of saturated carbon chains

Cited by 6 publications

References 28 publications

Double-Sided, Omnidirectional γ-AlOOH Hierarchical Nanostructures: Imparting Enhanced Antireflective Properties with Self-Cleaning Capacity for Optical Devices

Double-Sided, Omnidirectional γ-AlOOH Hierarchical Nanostructures: Imparting Enhanced Antireflective Properties with Self-Cleaning Capacity for Optical Devices

Fabrication and Characterization of Transparent and Scratch-Proof Yttrium/Sialon Thin Films

Colloidal assembly to antireflection coatings

Contact Info

Product

Resources

About