Sol–gel preparation of moisture-resistant antireflective coatings from novel hollow silica nanoparticles

Tao, Chaoyou; Yan, Hongwei; Yuan, Xiaodong; Yin, Qiang; Zhu, Jianping; Ni, Wei; Yan, Lianghong; Zhang, Lin

doi:10.1007/s10971-016-4125-x

Cited by 23 publications

(11 citation statements)

References 36 publications

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“…ARC made from solo silica HNs had poor adhesion to substrate and was not durable enough for outdoor applications [ 23 ]. On the contrast, the silica ARCs made from acid-catalyzed silica sol-gel possess a low porosity, resulting in a high refractive index [ 24 ], while acid-catalyzed silica has a linear or random branch-chain structure, which strongly bonds to glass substrates [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

“…The PAA cores were removed during calcination at 500 • C. In this paper, silica HNs with a PAA core diameter of 40-50 nm and a silica shell thickness of 8-10 nm was prepared, as shown in Figure 1a. ARC made from solo silica HNs had poor adhesion to substrate and was not durable enough for outdoor applications [23]. On the contrast, the silica ARCs made from acidcatalyzed silica sol-gel possess a low porosity, resulting in a high refractive index [24], while acid-catalyzed silica has a linear or random branch-chain structure, which strongly bonds to glass substrates [25].…”

Section: Structure and Morphology Of Sio 2 -Tio 2 Closed-surface Arcmentioning

confidence: 99%

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Closed-Surface Multifunctional Antireflective Coating Made from SiO2 with TiO2 Nanocomposites

et al. 2021

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An SiO2–TiO2 closed-surface antireflective coating was fabricated by the one-dipping method. TiO2 nanoparticles were mixed with a nanocomposited silica sol, which was composed of acid-catalyzed nanosilica networks and silica hollow nanospheres (HNs). The microstructure of the sol–gel was characterized by transmission electron microscopy. The silica HNs were approximately 40–50 nm in diameter with a shell thickness of approximately 8–10 nm. The branched-chain structure resulting from acidic hydrolysis grew on these silica HNs, and TiO2 was distributed inside this network. The surface morphology of the coating was measured by field emission scanning electron microscopy and atomic force microscopy. After optimization, transmittance of up to 94.03% was obtained on photovoltaic (PV) glass with a single side coated by this antireflective coating, whose refractive index was around 1.30. The short-circuit current gain of PV module was around 2.14–2.32%, as shown by the current–voltage (IV) curve measurements and external quantum efficiency (EQE) tests. This thin film also exhibited high photocatalytic activity. Due to the lack of voids on its surface, the antireflective coating in this study possessed excellent long-term reliability and robustness in both high-moisture and high-temperature environments. Combined with its self-cleaning function, this antireflective coating has great potential to be implemented in windows and photovoltaic modules.

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Section: Resultsmentioning

confidence: 99%

Section: Structure and Morphology Of Sio 2 -Tio 2 Closed-surface Arcmentioning

confidence: 99%

Closed-Surface Multifunctional Antireflective Coating Made from SiO2 with TiO2 Nanocomposites

et al. 2021

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“…These gaps and pores can provide a large amount of space for trapping air, which can effectively decrease the refractive index of the coating because air has much lower refractive index than almost all solid materials. 44,45 Second, the scattering effect also has an important impact on the transmittance of rough surface. The scattering is related to the sizes of the pores and gaps.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The pores and gaps on the PDMS/SiO 2 coating have much larger sizes, which would lead to the strong scattering of incident light, thus decreasing the transmittance. 44,46 Oppositely, because of the rearrangement of the particles on the C-PDMS/SiO 2 coating, the sizes of the pores and gaps on this coating become small, which effectively resist the scattering of the incident light and increase the transmittance. The WCAs and transparencies of the C-PDMS/SiO 2 coating were compared with those of other similar coatings in previous articles (Table 1).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Eco-Friendly Fabrication of Transparent Superhydrophobic Coating with Excellent Mechanical Robustness, Chemical Stability, and Long-Term Outdoor Durability

et al. 2022

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Surfaces that possess both superhydrophobicity and high transparency at the same time recently have attracted extensive attention in outdoor applications. However, fabrication and application of transparent superhydrophobic coating usually face following challenges: the micro–nano hierarchical structure required for superhydrophobicity usually leads to a decrease in the light transmittance due to its light trapping effect; fluorine-containing materials used in the preparation of superhydrophobic surfaces are potentially harmful to humans and the environment; and the superhydrophobic surface is easily destroyed by external factors. In this work, a transparent superhydrophobic coating was fabricated via an inexpensive and eco-friendly two-step method, that is, dipping glass substrate into the polydimethylsiloxane/SiO2 suspension followed by calcination treatment. The prepared coating showed superhydrophobicity with a water contact angle of 164° and a sliding angle less than 1.0°. In the visible light region with the wavelength range of 300–900 nm, the maximal transmittance of the superhydrophobic coating was ∼91.4%, which is higher than that of the untreated glass substrate (∼90.9%). Moreover, the coating can maintain superhydrophobicity and high transmittance after sandpaper abrasion, water flow impact, immersion in strong acid/alkaline solution, UV irradiation, and long-term outdoor exposure. We believing that the coating has huge potential value in outdoor applications.

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“…The HSNs were prepared by the modified Stöber method [18]. In accordance with previous work [16,19,20], 0.15 g PAA was dissolved in 7 mL ammonia hydroxide at room temperature and then mixed with 180 mL of ethanol in a 250-mL glass conical flask. After that, 1 mL Tetraethoxysilicate (TEOS, < 98 %) was gradually injected into the solution within 5 hrs under vigorous magnetic stirring at 30 ∘ C. Finally, the synthetic HSN solution (RI 1.2, particle diameter ∼40nm) was obtained.…”

Section: Synthesis Of Hsns and Meniscusmentioning

confidence: 99%

Micro/Nanofiber with Hollow Silica Nanoparticles Thin-Film for Airborne Molecular Contaminants Real-Time Sensing

Niu

Zhou

Miao

et al. 2018

Advances in Condensed Matter Physics

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A novel chemical sensing approach detecting airborne molecular contaminants (AMCs) or compounds is demonstrated by using single-mode optical microfibre (OMF) coated with hollow silica nanoparticles (HSNs). The concentration of AMCs, which were volatilized on the surface of the tapered microfibre coated with HSNs, influences the transmission loss of the microfibre. Tapered OMF was fabricated using a high-precision electrically controlled setup, and coatings of HSNs were prepared by meniscus coating method. The transmission loss of three OMFs with different diameters and the same thick coating were tested to determine the relationship between AMC concentrations and transmission loss of coated OMFs. Experimental results showed that the transmission loss increases with increasing concentration of AMCs. The sensitivity for volatile simethicone was 0.0263 dB/mg/m3 obtained by the coated OMF with diameter of 2.5 μm, and the sensitivity values of coated OMF with diameters of 5 μm and 6 μm were 0.0024 and 0.0018 dB/mg/m3, respectively. Thus the proposed coated OMF can be used in enclosed space for AMCs sensing.

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Sol–gel preparation of moisture-resistant antireflective coatings from novel hollow silica nanoparticles

Cited by 23 publications

References 36 publications

Closed-Surface Multifunctional Antireflective Coating Made from SiO2 with TiO2 Nanocomposites

Closed-Surface Multifunctional Antireflective Coating Made from SiO2 with TiO2 Nanocomposites

Eco-Friendly Fabrication of Transparent Superhydrophobic Coating with Excellent Mechanical Robustness, Chemical Stability, and Long-Term Outdoor Durability

Micro/Nanofiber with Hollow Silica Nanoparticles Thin-Film for Airborne Molecular Contaminants Real-Time Sensing

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