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Journal articles on the topic 'Films de silice'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Bouchard, H., A. Azelmad, J. F. Currie, and M. Meunier. "Variation de la contrainte des verres de silice sous cycle thermique." Canadian Journal of Physics 70, no. 10-11 (1992): 830–33. http://dx.doi.org/10.1139/p92-131.

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Using an in situ technique, stress was measured as a function of annealing temperature to investigate the effect of phosphorous and boron doping of silicon dioxide glass films deposited by low-pressure chemical vapor deposition (LPCVD). It was found that the initial stress of phosphosilicate glass is independent of the amount of phosphorus present, while the boron content influences the initial stress in borophosphosilicate glass. The stress increases to a maximum, σm, corresponding to a temperature Tm, above which the onset of viscous flow reduces the stress to zero at a temperature T0. All t

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2

Bahlawane, N., M. Charbonnier, and M. Romand. "Apport des techniques XRFS et LEEIXS à l'étude de la formation de films de silice sur acier par PACVD." Le Journal de Physique IV 08, PR5 (1998): Pr5–271—Pr5–278. http://dx.doi.org/10.1051/jp4:1998534.

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3

Balan, Poovarasi, Aaron Ng, Chee Beng Siang, R. K. Singh Raman, and Eng Seng Chan. "Effect of Nanoparticle Addition in Hybrid Sol-Gel Silane Coating on Corrosion Resistance of Low Carbon Steel." Advanced Materials Research 686 (April 2013): 244–49. http://dx.doi.org/10.4028/www.scientific.net/amr.686.244.

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Chromium pre-treatments of metal have been replaced by silane pre-treatments as more environmental friendly option. Nanoparticles can be added in the silane sol-gel network have been reported to improve corrosion resistance. In this work, the electrochemical corrosion resistance of low carbon steel coated with hybrid organic-inorganic sol-gel film filled with nanoparticles was evaluated. The sol-gel films have been synthesized from 3-glycidoxy-propyl-trimethoxy-silane (3-GPTMS) and tetra-ethyl-ortho-silicate (TEOS) precursors. These films have been impregnated with 300 ppm of silica or alumina

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4

Park, Hoy Yul, Dong Pil Kang, In Hye Myung, and Seog Young Yoon. "Properties of Coating Films Synthesized from Nano Colloidal Silica and Alkoxy Silanes." Materials Science Forum 510-511 (March 2006): 222–25. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.222.

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Colloidal silica/silane sol solutions were prepared in variation with the ratio of silane to colloidal silica. Such sol solutions were synthesized from colloidal silica/tetramethoxysilane (TMOS)/methyltrimethoxysilane(MTMS). Sol solutions were prepared by sol-gel reaction through two step reactions. To understand their physical and chemical properties, dip coating of sol solutions was performed on the glass substrates. Contact angle and thickness of coating films increased with increasing the amount of MTMS. The surface free energy of coating films decreased with increasing amount of MTMS. Coa

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5

Tao, Yao, Feng Zheng, Zhao Chen, Shuangshuang Chen, Xuemin Lu, and Qinghua Lu. "Comparison of hybrid polyimide films with silica and organosilica obtained via sol–gel process." High Performance Polymers 29, no. 9 (2016): 1049–57. http://dx.doi.org/10.1177/0954008316668242.

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A series of polyimide/silica (PI–S) and polyimide/organosilica (PI–OS) hybrid films were prepared via a sol–gel process from mixtures of poly(amic acid) (PAA) and tetraethoxysilane or a silane coupling agent in solution. The PAA was synthesized from bis-(3-phthalyl anhydride) ether and 1,4-bis (4-aminophenoxy) benzene. The hybrid films were produced via an imidization reaction to form silica particles or a silica network in a polymer matrix through a programmed heating process. The derived films were characterized and compared by Fourier transform infrared spectroscopy, field emission scanning

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6

Jiang, Pei-Cheng, Yu-Ting Chow, Chi-Wei Chien, Cheng-Hsun-Tony Chang, and Chii-Ruey Lin. "Silica Layer Used in Sensor Fabrication from a Low-Temperature Silane-Free Procedure." Chemosensors 9, no. 2 (2021): 32. http://dx.doi.org/10.3390/chemosensors9020032.

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Silica (SiO2, silicon dioxide—a dielectric layer commonly used in electronic devices) is widely used in many types of sensors, such as gas, molecular, and biogenic polyamines. To form silica films, core shell or an encapsulated layer, silane has been used as a precursor in recent decades. However, there are many hazards caused by using silane, such as its being extremely flammable, the explosive air, and skin and eye pain. To avoid these hazards, it is necessary to spend many resources on industrial safety design. Thus, the silica synthesized without silane gas which can be determined as a sil

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7

Zhou, Yingyu, and Hongling Chen. "Robust Super-Repellent Anisotropic Silica Films by Emulsion-Based Sol–Gel Growth." Nano 13, no. 01 (2018): 1850005. http://dx.doi.org/10.1142/s1793292018500054.

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In this paper, anisotropic SiO2 with different morphologies were synthesized through an emulsion-based one-pot method by adding various silane coupling agents. Silane coupling agents affected the growth of silica nanostructures at the oil/water interfaces. Robust super-repellent film that showed great durability under different harsh conditions were obtained by bonding the self-assembled anisotropic silica nanostructures (ASN) film to substrate by the commercial acrylic adhesive. The film switched from superhydrophobic (157.1[Formula: see text] to superhydrophilic (0[Formula: see text] after b

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8

Na, Moon Kyong, Dong Pil Kang, Hoy Yul Park, Myeong Sang Ahn, and In Hye Myung. "Properties of Nano-Hybrid Sol-Gel Materials Synthesized from Colloidal Silica-Silane Containing Epoxy Silane." Key Engineering Materials 336-338 (April 2007): 2278–81. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.2278.

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Three kinds of colloidal silica (CS)/silane sol solutions were synthesized in variation with parameters such as different acidity and reaction time. Sol solutions were prepared from HSA CS/ methyltrimethoxysilane (MTMS), LS CS/MTMS and LS CS/MTMS/γ -Glycidoxypropyltri methoxysilane (ES) solutions. In order to understand their physical and chemical properties, sol-gel coating films were fabricated on glass. Coating films on glass, obtained from LS/MTMS sol, had high contact angle, also, much enhanced flat surface in the case of LS/MTMS sol was observed in comparison with HSA/ MTMS sol. From all

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9

Kurniasih, Yeti, Hasan Basri, and Baiq Asma Nufida. "The Effect of Type and Concentration of Receiving Phase on Silver Separation Efficiency by Supported Liquid Membrane Technique." Jurnal Ilmiah Mandala Education 10, no. 1 (2024): 53. http://dx.doi.org/10.58258/jime.v10i1.6504.

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The Effect of The Type and Concentration of The Receiving Phase on The Efficiency Of Silver Separation with Liquid Supported Membrane Techniques. The process of making negative x-ray films in a radiology laboratory produces liquid wastes containing various chemical compounds with the main content being Ag metal (in the form of Ag+ cations). This waste is categorized as a dangerous and toxic material. Therefore it is necessary to separate the Ag metal before it is discharged into the environment so as not to be harmful to life and the environment. One of the separation techniques that can be us

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10

Mahdi, Billal, and Farid Rouabah. "Effect of Titanium Dioxide Nanoparticles on the Properties of Poly(Vinyl Alcohol)/Silica Hybrid Films Prepared by the Sol-Gel Method." Nano Hybrids and Composites 38 (February 3, 2023): 63–79. http://dx.doi.org/10.4028/p-381bv9.

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This work is focused on the preparation and characterization of poly (vinyl alcohol)/silica gel/Nano-TiO2, and the study of titanium dioxide (TiO2) nanoparticles (from 1 to 5%) on the properties of poly (vinyl alcohol) (PVA)/silica films. This new material was prepared by the sol-gel method using poly (vinyl alcohol) powder with Tetraethyl Orthosilicate (TEOS) as a precursor source of silica. TEOS was hydrolyzed and condensed in water and ethanol in the presence of hydrochloric acid (HCl) used as a catalyst. Fourier transform infrared (FT-IR), water absorption, water contact angle, ultraviolet

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11

Yoo, Woo Sik, Richard Swope, Barbara Sparks, and David Mordo. "Comparison of C2F6 and FASi-4 as fluorine dopant sources in plasma enhanced chemical vapor deposited fluorinated silica glass films." Journal of Materials Research 12, no. 1 (1997): 70–74. http://dx.doi.org/10.1557/jmr.1997.0012.

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Fluorine doping of silicon dioxide films in tetraethylorthosilicate (TEOS)-based plasma enhanced chemical vapor deposition (PECVD) processes was investigated using two fluorine dopant sources, C2F6 and 1,2 bis[methyldifluorosilyl]ethane (FASi-4). Much as TEOS-based undoped silica glass (USG) films display improved step coverage over silane-based USG films, it was suspected that fluorinated silica glass (FSG) films deposited using the relatively new TEOS-based fluorine source FASi-4 might have improved gap fill capabilities as compared to FSG films deposited using gas-based C2F6 fluorine source

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12

Raditoiu, Alina, Valentin Raditoiu, Florentina Monica Raduly, et al. "Fluorescent Silica Hybrid Film-Forming Materials Based on Salicylaldazine." Coatings 10, no. 12 (2020): 1255. http://dx.doi.org/10.3390/coatings10121255.

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Fluorescent film-forming materials were obtained by embedding salicylaldazine (SAA) in silica hybrids generated by sol–gel processes from different silane precursors in acid catalysis. Tuned local environments for the fluorophore were generated in the hosting network by modifying silica sols with organic groups through the co-condensation of tetraethylortosilicate (TEOS) and different alkoxysilanes hydrolysis products. The photophysical properties of the luminescent hybrid films were studied in direct relationship with structural, textural, and surface properties and based on interactions betw

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13

Yang, Jin Chul, Suck Won Hong, and Jinyoung Park. "Improving Surface Imprinting Effect by Reducing Nonspecific Adsorption on Non-Imprinted Polymer Films for 2,4-D Herbicide Sensors." Chemosensors 9, no. 3 (2021): 43. http://dx.doi.org/10.3390/chemosensors9030043.

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Surface imprinting used for template recognition in nanocavities can be controlled and improved by surface morphological changes. Generally, the lithographic technique is used for surface patterning concerning sensing signal amplification in molecularly imprinted polymer (MIP) thin films. In this paper, we describe the effects of silanized silica molds on sensing the properties of MIP films. Porous imprinted poly(MAA–co–EGDMA) films were lithographically fabricated using silanized or non-treated normal silica replica molds to detect 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide as the stand

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14

Hutchings, Gregory S., Xin Shen, Chao Zhou, et al. "Scalable production of single 2D van der Waals layers through atomic layer deposition: bilayer silica on metal foils and films." 2D Materials 9, no. 2 (2022): 021003. http://dx.doi.org/10.1088/2053-1583/ac5005.

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Abstract The self-limiting nature of atomic layer deposition (ALD) makes it an appealing option for growing single layers of two-dimensional van der Waals (2D-VDW) materials. In this paper it is demonstrated that a single layer of a 2D-VDW form of SiO2 can be grown by ALD on Au and Pd polycrystalline foils and epitaxial films. The silica was deposited by two cycles of bis(diethylamino) silane and oxygen plasma exposure at 525 K. Initial deposition produced a three-dimensionally disordered silica layer; however, subsequent annealing above 950 K drove a structural rearrangement resulting in 2D-V

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15

Yao, N., M. Trau, N. Nakagawa, and I. A. Aksay. "Self-Assembled and Micro-Patterned Mesoscopic Thin Films." Microscopy and Microanalysis 4, S2 (1998): 730–31. http://dx.doi.org/10.1017/s1431927600023771.

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Recently we have reported that the silica mesoscopic thin films can be formed at water/solid interface at room temperature. These self-assembled thin films are comprised of hexagonally packed nanotubules ((∼ 5 nm in diameter), with a percolating one-dimensional channel network that extends from one side of the film to the other. The solid substrate can affect strongly the overall alignment of assembly of surfactant micelle array. These films hold much promise for applications such as their use as orientated nanowires, sensor/actuator arrays and optoelectronic devices. Here, we report further e

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16

Chien, Wen Chen, Yang Yen Yu, and Shih Yu Chen. "Synthesis and Characterization of Photopolymerized Poly(acrylic)/Monodispersed Colloidal Silica Hybrid Thin Films." Advanced Materials Research 47-50 (June 2008): 662–65. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.662.

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In this study, poly(acrylic)/silica hybrid thin films were prepared from various acrylic monomers and monodispersed colloidal silica with a coupling agent MSMA. The silica content in the hybrid thin films was varied from 0 to 50 wt%. The experimental results showed that the coverage area of silica particle by the MSMA decreased with increasing silica content and resulted in the aggregation of silica particle in the hybrid films. Thus, the silica domain in the hybrid films was varied from 20 to 35 nm by the different mole ratios of MSMA to silica. The results of SEM, TEM, and EA supported the a

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17

Vlaskin, V. I. "Nanocrystalline silicon carbide films for solar cells." Semiconductor Physics Quantum Electronics and Optoelectronics 19, no. 3 (2016): 273–78. http://dx.doi.org/10.15407/spqeo19.03.273.

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18

Li, Yu, Yi He Zhang, Bo Shen, and Feng Zhu Lv. "Preparation and Dielectric Properties of Polyimide Nanocomposite Films Based on Hollow Silica." Advanced Materials Research 217-218 (March 2011): 647–51. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.647.

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The hollow silica was fabricated by using monodispersed polystyrene microspheres as core template and tetraethyl orthosilicate as silica source, and polyimide nanocomposite films with different hollow silica concentration were successfully prepared via in situ polymerization. The hollow silica and nanocomposite films were characterized. The results indicated that the diameter of the hollow silica is around 30nm and the dielectric constant of the nanocomposite films enhance with the increase of the concentration of the hollow silica.

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19

Mathabani, Amirhossein, Ilkka Rytöluoto, Xiaozhen He, et al. "Solution Modified Fumed Silica and Its Effect on Charge Trapping Behavior of PP/POE/Silica Nanodielectrics." Proceedings of the Nordic Insulation Symposium, no. 26 (August 8, 2019): 129–33. http://dx.doi.org/10.5324/nordis.v0i26.3292.

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Various dielectric nanocomposite materials are studied in the frame of the European Commission funded project GRIDABLE. This project has the aim to develop DC cable extruded insulation and medium and low voltage DC capacitor films exhibiting enhanced performance with respect to presently used materials. The nanocomposites intended for cable applications are polypropylene (PP)/polyolefin elastomer (POE) blends filled with surface modified nano-silica particles. The surface modification is carried out via the state-of-the-art solution method using a polar silane as the modifying agent. Thermally

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20

Na, Moon Kyong, Hoy Yul Park, Dong Pil Kang, and Myeong Sang Ahn. "Properties of Nano-Hybrid Sol-Gel Coating Films Synthesized with Colloidal Silica and Organoalkoxy Silanes." Materials Science Forum 569 (January 2008): 69–72. http://dx.doi.org/10.4028/www.scientific.net/msf.569.69.

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Three kinds of colloidal silica (CS)/silane sol were prepared. Sols are involved with the kinds of silane with different organic group. Methyltrimethoxysilane (MTMS) has the three methoxy groups and a methyl group. γ-Glycidoxypropyltrimethoxysilane (GTMS) has the three methoxy groups and a bulky epoxy group. GTMS was added to two sols with different amount. When sol reacted for 10 days, viscosity increased dramatically. Trasnmittance of sols reacted for 10 days decreased rapidly, too. It indicated the stability of sol degraded. Sol-gel coating films were formed on glass substrate using spin co

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21

Yu, Yang Yen, Wen Chen Chien, and Tsung Wei Tsai. "Microstructure and Properties of Polyimide /Monodispersed Colloidal Silica Hybrid Films Prepared by Sol–Gel Process." Advanced Materials Research 47-50 (June 2008): 650–53. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.650.

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In this study, the polyimide-silica hybrid thin films, 6FDA-6FpDA-4ABA/SiO2 (FS0-FS50) were prepared from the 12nm colloidal silica and polyimide bearing acid endgroups. During the preparation, without any additional coupling agents or chelating ligands were used. The strong interactions between carboxylic acid coordinating with silica were believed to prevent the macrophase separation. TGA analysis showed that the thermal decomposition temperatures (Td) incresased with increasing the silica content. UV-VIS spectra showed that the cutoff wavelength of prepared hybrid films could be tunable thr

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22

Kubo, Tomoko, Eisuke Tadaoka, and Hiromitsu Kozuka. "Formation of silica coating films from spin-on polysilazane at room temperature and their stability in hot water." Journal of Materials Research 19, no. 2 (2004): 635–42. http://dx.doi.org/10.1557/jmr.2004.19.2.635.

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Spin-coating was conducted on single-crystal silicon substrates using a xylene solution of perhydropolysilazane (PHPS) to obtain 0.14-μm-thick PHPS films. The PHPS films obtained were suspended over various acidic and basic solutions at room temperature so that they were exposed to the vapors from the solutions. PHPS-to-silica film conversion was studied by infrared absorption spectroscopy, and the stability of the exposed films in hot water was examined by soaking the films in 80 °C water. The as-deposited PHPS films were found to be dissolved in water. When the PHPS films were suspended over

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23

Zhang, Yi He, Qing Song Su, Li Yu, et al. "Study on the Dielectric Properties of Hybrid and Porous Polyimide-Silica Films." Advanced Materials Research 47-50 (June 2008): 973–76. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.973.

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A sol-gel process was used to prepare polyimide-silica hybrid films from the polyimide precursors and TEOS in N,N- dimethyl acetamide, then the hybrid film was treated with hydrofluoric acid to remove the dispersed silica particles, leaving pores with diameters between 80nm to 1µm, depending on the size of silica particles. The structure and dielectric constant of the hybrid and porous films were characterized by FTIR,SEM. The porous films displayed relatively low dielectric constant compared to the hybrid polyimide-silica films.

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Loughlani, Rayane-Ichrak, Alonso Gamero-Quijano, and Francisco Montilla. "Electroassisted Incorporation of Ferrocene within Sol–Gel Silica Films to Enhance Electron Transfer." Molecules 28, no. 19 (2023): 6845. http://dx.doi.org/10.3390/molecules28196845.

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The sol–gel method is a straightforward technique that allows electrode modification with silica thin films. Furthermore, the silica pores could be functionalized to enhance the electrical conductivity and reactivity of the silica films. In this context, silica thin films were functionalized with ferrocene species. This functionalization was performed by electroassisted accumulation, generating a micro-structured composite electrode (Fc@SiO2 electrode). These modified electrodes were characterized by electrochemical and spectroelectrochemical methods, pointing out that ferrocene species were c

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25

Bi, Wen Yue, Li Wang, Xin Gang Yu, Xing Dong Zhang, Hong Quan Bao, and Hui Feng Zhao. "Effect of Heat Treatment on Coloration of Ag Doped TiO₂-SiO₂ Films." Key Engineering Materials 336-338 (April 2007): 1793–95. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1793.

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Silver doped titania-silica films were fabricated by two-step route of sol-gel method using Ti(OC4H9)4, Si(OC2H5)4 and AgNO3 as the precursor materials. The films were annealed at temperature from 350°C to 560°C for a period of time ranging from 15min to 90 min. Optical properties of the films were characterized by UV-visible spectroscopy and the state of silver in the titania-silica films was investigated by XRD patterns. It was found that the annealing temperature and time have considerably influenced the coloration of the films, and with the increase of annealing temperature the [111] orien

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Kang, Young Taec, Jin Kook Lee, and Dong Pil Kang. "Properties of Organic/Inorganic Hybrid Material Synthesized from Acrylic Resin and Silane-Terminated CS." Materials Science Forum 544-545 (May 2007): 809–12. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.809.

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Organic/inorganic hybrid materials synthesized from acrylic resin and silane-terminated colloidal silica(CS). The silane-terminated CS was prepared in variation with the kind of silane to CS. The CS treated with methyltrimethoxysilane(MTMS) and then treated with vinyl trimethoxysilane(VTMS), 3-glycidoxypropyltrimethoxysilane(ATMS) or 3-methacyloxypropyl trimethoxysialne(ETMS) by sol-gel method, respectively. The variation of silane-terminated CS and acrylic resin were hybridized by thermal-polymerization. Thin films of organic/inorganic hybrid materials were prepared using spin coater on the g

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Steglich, Martin, Thomas Kasebier, Ingmar Hoger, Kevin Fuchsel, Andreas Tunnermann, and Ernst-Bernhard Kley. "Black Silicon nanostructures on silicon thin films prepared by reactive ion etching." Chinese Optics Letters 11, S1 (2013): S10502. http://dx.doi.org/10.3788/col201311.s10502.

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Horikawa, Hajime, Takashi Ogihara, Akio Shimomura, and Junko Shimomura. "Preparation and Characterization of Silica Film on PBT Substrate by Sol-Gel Method Using Perhydropolysilazane." Key Engineering Materials 421-422 (December 2009): 161–64. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.161.

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Silica, silica/polymethylmethacrylate (PMMA) hybrid, and silica-particle blend silica films were successfully prepared on polybutylene terephtalate (PBT) substrate by dip coating using perhydropolysilazane (PHPS) as a silica source. The effect of thermal treatment on conversion from PHPS to silica was investigated in detail by scanning electron microscopy and Fourier transform infrared spectroscopy. Mechanical properties of silica and silica/PMMA hybrid thin films also were examined by the pencil scratch hardness tests.

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Olkhov, Anatoliy, and Gennady Zaikov. "Nanocomposites Based on Polyethylene and Nanocrystalline Silicon Films." Vestnik Volgogradskogo gosudarstvennogo universiteta. Serija 10. Innovatcionnaia deiatel’nost’, no. 6 (December 15, 2014): 63–72. http://dx.doi.org/10.15688/jvolsu10.2014.6.6.

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Park, Oun-Ho, Se-Young Seo, Ji-In Jung, Jae Young Bae, and Byeong-Soo Bae. "Photoluminescence of mesoporous silica films impregnated with an erbium complex." Journal of Materials Research 18, no. 5 (2003): 1039–42. http://dx.doi.org/10.1557/jmr.2003.0143.

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Transparent mesoporous silica films were prepared by sol-gel spin coating on silicon wafers at room temperature. An erbium complex, erbium tris 8-hydroxyquinoline (ErQ), was homogeneously impregnated into the pores of the mesoporous silica films, and its concentration was easily controlled by using a solution immersing technique. The ErQ-impregnated mesoporous silica films show a room-temperature photoluminescence at 1.5 µm.

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Ushijima, Sota, and Toshiyuki Ikoma. "Fabrication of Mesoporous Silica Thin Film Platforms for Surface Reaction with Surface Plasmon Resonance." Key Engineering Materials 758 (November 2017): 24–28. http://dx.doi.org/10.4028/www.scientific.net/kem.758.24.

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Mesoporous silica thin films were fabricated on gold substrates with a sol-gel method including a cationic surfactant. The interface of gold and silica thin films was fixed with a mercaptosilane. The surface roughness of the thin films and their grain sizes of silica were both increased with the elimination of the cationic surfactant and polyethylene glycol (PEG) modification on its surface. The surface reaction, adsorption of bovine serum albumin (BSA), was monitored with surface plasmon resonance (SPR). Although the adsorption amount of BSA at 1 mg/mL were 7.9 ng/cm2 on the mesoporous silica

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Qin, Xiao Gang, Sheng Sheng Yang, Liang Shi, An Xing, and Yuan Gao. "Preparation of Silica Hybrid Films on PMMA by Sol-Gel and Solvothermal Methods." Advanced Materials Research 785-786 (September 2013): 877–80. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.877.

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Using solvothermal method to modify the surface of polymethyl methacrylate (PMMA), the silica films were prepared on it via sol solution and solvothermal treatment. Silica-based hybrid sol solutions were synthesized from tetraethoxysilane (TEOS) and methyltrimethoxysilane (MTMS). The obtained silica-based hybrid films consisted of the uniform particles around 40 nm in diameter observed by atomic force microscopy (AFM). The optical property was evaluated by the UV-Vis absorption spectra. The silica hybrid films prepared through this process showed good optical transmittance.

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Zhang, Xin, Lei Mao, and Jing Ma. "An Investigation on Surface Sol-Gel Silica Film." Advanced Materials Research 787 (September 2013): 65–70. http://dx.doi.org/10.4028/www.scientific.net/amr.787.65.

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Ultrathin silica films were grown on polyimide substrates using surface sol-gel method and the film growth process was characterized by ellipsometry, atomic force microscopy, X-ray photoelectron spectroscopy, Fourier transformed infrared spectroscopy. The polyimide substrates were pretreated by chemical process for promoting the growth of silica film. On the modified polymide surface, the growth of silica films shows an island-like growth type, but not a lay-by-lay process. Moreover, the deposited silica films are not a strict SiO2 film.

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Guo, Pei Tao. "Improvement in Mechanical Property of SiO₂ Films Prepared by Sol-Gel." Advanced Materials Research 744 (August 2013): 269–72. http://dx.doi.org/10.4028/www.scientific.net/amr.744.269.

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Silica films prepared by the base catalyzed sol–gel process show poor mechanical property. In this study, silica anti-reflective films with good mechanical property have been prepared by the catalyzed sol–gel process with dimethyl formamide added as drying control chemical additives. The silica sol was first dip deposited onto substrate to form films on both sides of the substrate and then subjected to thermal treatment. After thermal treatment, the film was achieved due to the formation of porous structure in the resultant film as a result of decomposing tetraethylorthosilicate and dimethyl f

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Yu, Yang Yen, Wen Chen Chien, and Chiung Lin Lai. "Preparation and Patterning of Optical Hybrid Thin Films Based on Photosensitive Polyimide and Monodispersed Colloidal Silica." Advanced Materials Research 47-50 (June 2008): 654–57. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.654.

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In this study, optical hybrid thin films were prepared from photosensitive poly(4,4-(hexafluoroisopropyl- idenediphthalic anhydride)-co-oxydianiline) (6FDA-ODA)/MDAE and monodispersed colloidal silica with a coupling agent. It was a combination of the sol–gel reaction, thermal polymerization and spin coating. The coupling agents were 3-methacryloxypropyl trimethoxysilane (MPTMS) or (4-vinylphenethyl)trimethoxysilane (VPTMS). The silica content in the hybrid thin films was varied from 0 to 8.6wt%. The coupling agent and the silica domain were designed primarily for reducing the volume shrinkage

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Chauhan, Shobhit Singh, A. L. Sharma, and R. V. Jasra. "Photofunctions of Dye Encapsulated Nanostructured Silica Films Suitable for Optical Filter Application." Materials Science Forum 757 (May 2013): 257–69. http://dx.doi.org/10.4028/www.scientific.net/msf.757.257.

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The development of nanostructured silica thin films encapsulated with organic functionalities has been an area of active research. The functionalization of films can be done by post doping, covalent or non-covalent methodology. The materials researchers were interested to study and understand the nature of interactions existing in the host silica network and associated physicochemical properties of the derived films. The photofunction imparted films have been explored for chemical and biological sensing applications. In the presented work, an optical filter application based on dye encapsulate

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Dhapte, Vividha, Shivajirao Kadam, Varsha Pokharkar, Pawan K. Khanna, and Vishwas Dhapte. "Versatile SiO2 Nanoparticles@Polymer Composites with Pragmatic Properties." ISRN Inorganic Chemistry 2014 (January 29, 2014): 1–8. http://dx.doi.org/10.1155/2014/170919.

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In the present work, we report the fabrication of silica nanoparticles embedded polymeric (SiO2 nanoparticles@polymer) composite films for numerous traits like texture, folding endurance, crystallinity, size, thermal behavior, spectral analysis, and bioactivity. Significant facets of bulky, inert, inorganic materials are known to burgeon out due to the high surface area of nanosized particles. Nature and proportion of silica nanoparticles as well as polymers exhibited remarkable impact on the fabrication and quality of casted films. Hydrophilic silica nanoparticulate-PVA films depicted better

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Julve, Daniel, Miguel Menéndez, Jorge Pérez, and José Ramos. "MICRODISPERSION OF SILICA IN TIRE TREAD COMPOUNDS ABOVE THE PERCOLATION THRESHOLD BY TEM IMAGE MEASUREMENTS." Rubber Chemistry and Technology 84, no. 1 (2011): 74–87. http://dx.doi.org/10.5254/1.3544676.

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Abstract Dispersion values in rubber are usually subjective values or the result of a comparison against empirical standards. we present a method to measure the filler dispersion in rubber compounds reinforced beyond the percolation threshold. Applying this method to an actual technical formulation with high filler loading, the dispersability of different silica grades, as well as the effect of coupling agent concentration in the dispersion has been showed. To carry out the measurements, the finished rubber is sliced in very thin films and then examined with transmission electron microscopy (T

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Zhang, Rongfei, Xiangyou Wang, Juan Wang, and Meng Cheng. "Synthesis and Characterization of Konjac Glucomannan/Carrageenan/Nano-silica Films for the Preservation of Postharvest White Mushrooms." Polymers 11, no. 1 (2018): 6. http://dx.doi.org/10.3390/polym11010006.

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In this study, the konjac glucomannan (KGM)/carrageenan (KC)/nano-silica film was prepared and characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The preservation quality of white mushrooms (Agaricus bisporus) packed using the films was also determined. The nano-silica dosage was found to affect the properties of the nanocomposite KGM/KC films. The results indicated that the properties of the films were significantly improved with the addition of nano-silica. The water vapor permeability, water solubility, moisture

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Myung, In Hye, Hoy Yul Park, Moon Kyong Na, Myeng Sang Ahn, and Dong Pil Kang. "Characteristics of Thin Films Synthesized from Colloidal Silica-Silane Sols." Molecular Crystals and Liquid Crystals 463, no. 1 (2007): 213/[495]—220/[502]. http://dx.doi.org/10.1080/15421400601027940.

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Zhou, Qi, Guang Xia Sun, Ping Zhao, and Hong Yan Liu. "Corrosion Resistance of KH-550 and KH-567 Composite Silane Films on Cast Aluminum Alloy." Advanced Materials Research 460 (February 2012): 90–93. http://dx.doi.org/10.4028/www.scientific.net/amr.460.90.

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The silane films are fabricated by dipping cast aluminum alloy in silane solution, then curing films. The corrosion resistance of single silane film, composite silane film is compared with phosphating film through acid dropping test, salt water immersion test and electrochemical impedance test (EIS), the results shows that the silane films are obviously superior to the phosphating films in terms of the corrosion resistance of acid solution and neutral salt solution, particularly the corrosion resistance of composite silane films is much better than sigle silane films; corrosion polarization cu

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He, Jian Yun, Jin Ping Xiong, and Bing Qian Xia. "UV-Curable Organic-Inorganic Hybrid Films Based on Epoxynorbornene Linseed Oils." Advanced Materials Research 217-218 (March 2011): 294–99. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.294.

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Epoxynorbornene linseed oil (ENLO) is a new kind of epoxide from renewable sources. An UV-curable organic/inorganic hybrid films using epoxynorbornene linseed oils (ENLO) and surface treated nano-silica were formulated. The mechanical properties，thermal properties and coating properties of the ENLO /silica coatings were evaluated as the function of nano-silica content. The results indicated that after incorporating the nano-silica, the strength, modulus and glass transition temperature of the hybrid films enhanced, while the elongation at break decreased. The nano-silica also improved the hybr

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Xiaowei Zhang, Xiaowei Zhang, Tao Lin Tao Lin, Xiaofan Jiang Jun Xu (Mh) Xiaofan Jiang Jun Xu (Mh), Jianfeng Liu Jianfeng Liu, Ling Xu Ling Xu, and Kunji Chen Kunji Chen. "Photoluminescence from Er3+ ion and SnO2 nanocrystal co-doped silica thin films." Chinese Optics Letters 10, no. 9 (2012): 091603–91606. http://dx.doi.org/10.3788/col201210.091603.

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E., C. KІlІç, Akyol E., Karakuzu kizler B., C. Özarslan A., Özel C., and Yücel S. "Production of novel composite films based on PVA-biosilica." Journal of Indian Chemical Society Vol. 97, No. 10c, Oct 2020 (2020): 2092–96. https://doi.org/10.5281/zenodo.5665953.

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Department of Chemical Engineering, Yildiz Technical University, Istanbul, Turkey Department of Bioengineering, Yildiz Technical University, Istanbul, Turkey <em>E-mail</em>: yuce.sevil@gmail.com <em>Manuscript received online 20 October 2020, revised and accepted 31 October 2020</em> In this study, PVA/silica gel composite films were prepared. For this, sodium silicate solution was produced from rice hull ash (RHA) which is a cheap agricultural waste by alkali extraction method. Sodium silicate solutions were gelated at pH 7 with HCl addition by sol-gel method. Silica gels were added to PVA f

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Uysal, Bengü Özuğur, and Fatma Z. Tepehan. "Determination of growth kinetics and size dependent structural, morphological, optical characteristics of sol-gel derived silica nanoparticles in silica matrix." Materials Science-Poland 37, no. 1 (2019): 16–24. http://dx.doi.org/10.2478/msp-2019-0010.

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AbstractNanocomposite silica thin films made using the sol-gel method were studied. The nano-silica films were prepared using a mixture of tetraethyl orthosilicate (TEOS), deionized water, ethanol, and ammonia solution. To control the growth of the particles inside the film, the nanocomposite silica film was prepared using a mixture of the nano-silica sol and the silica sol. The change in the particle size with the heat treatment temperature ranging from 450 °C to 1100 °C was investigated. X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), NKD (refracti

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Na, Moon Kyong, Myeong Sang Ahn, and Hoy Yul Park. "Properties of Sol-Gel Coating Film from Colloidal Silica-Silane Sol." Materials Science Forum 544-545 (May 2007): 813–16. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.813.

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Two kinds of colloidal silica(CS)/silane sol solutions were prepared. Two sol solutions are involved with the kinds of silane such as methyltrimethoxysilane(MTMS) and -Glycidoxypropyl trimethoxysilane(ETMS) using LS CS. MTMS was added to two sol solutions. Whether ETMS was added or not, two kinds of sol solutions were synthesized. Using two kinds of sol solutions, sol-gel coating films were formed on glass substrates via dip-coating process. Here, seasoning effect of for enhancing properties of sol-gel coating layer on glass was investigated while such sol-gel solutions were left for 7days. Al

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Silviana, S., Gelbert Jethro Sanyoto, and Adi Darmawan. "PREPARATION OF GEOTHERMAL SILICA GLASS COATING FILM THROUGH MULTI-FACTOR OPTIMIZATION." Jurnal Teknologi 83, no. 4 (2021): 41–49. http://dx.doi.org/10.11113/jurnalteknologi.v83.16377.

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Glass coating films have been developed by many researchers in recent years. However, mass commercialization of this technology is still inefficient, and optimal methods are needed to produce affordable products. This paper introduces a film preparation method through, which a coating film is superimposed on silica glass by utilizing geothermal waste, a byproduct of geothermal power plants. Geothermal waste has been used as a silica precursor and modified using several silylation agents such as methyltriethoxysilane (MTMS), hexamethyldisilazane (HMDS), polydimethylsiloxane (PDMS), and surface-

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Alam, S. M. M. "Preparation and Performance of Nano-hybrids Synthesized from Polyimide and Silica." Journal of Scientific Research 2, no. 1 (2009): 99–107. http://dx.doi.org/10.3329/jsr.v2i1.2733.

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Polyimide (PI)-inorganic like silica hybrid films were successfully prepared to combine the good performances of silica like tensile modulus, thermal stability etc. into organic PI. Polyamic acid (PAA), precursor of PI, was prepared from 3, 3′, 4, 4′-biphenyltetracarboxylic dianhydride (BPDA), p-phenylediamine (PDA) and in-situ formed silica was formed into PAA from tetraethoxysilane (TEOS) through in-situ sol-gel process. The films were transparent and became translucent in presence of up to 10% inorganic contents. The chemical structures were characterized by Fourier transform infrared spect

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Yu, Yang Yen, Wen Chen Chien, and Shih Ting Chen. "Preparation of Nanoporous Mondispersed Silica Nanoparticles Films Using Poly(styrene)- Block-Poly( 2-Vinyl Pyridine) as Template." Advanced Materials Research 47-50 (June 2008): 646–49. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.646.

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Nanoporous silica films were prepared through the templating of amphiphilic block copolymer, poly(styrene-2-vinyl pyridine) (PS-b-P2VP), and colloidal silica nanoparticles. The experimental and theoretical studies suggested that the intermolecular hydrogen bonding was existed between the colloidal silica nanoparticles and PS-b-P2VP. The miscible hybrid and the narrow thermal decomposition of the PS-b-P2VP led to nanopores in the prepared films from the results of TGA, AFM, and TEM. The effects of the loading ratio and P2VP chain length on the morphology and properties of the prepared nanoporou

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Sängerlaub, Kucukpinar, and Müller. "Desiccant Films Made of Low-Density Polyethylene with Dispersed Silica Gel—Water Vapor Absorption, Permeability (H2O, N2, O2, CO2), and Mechanical Properties." Materials 12, no. 14 (2019): 2304. http://dx.doi.org/10.3390/ma12142304.

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Silica gel is a well-known desiccant. Through dispersion of silica gel in a polymer, films can be made that absorb and desorb water vapor. The water vapor absorption becomes reversible by exposing such films to a water vapor pressure below that of the water vapor pressure during absorption, or by heating the film. The intention of this study was to achieve a better understanding about the water vapor absorption, permeability (H2O, N2, O2, CO2), and mechanical properties of films with dispersed silica gel. Low-density polyethylene (PE-LD) monolayer films with a nominal silica gel concentration

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