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Journal articles on the topic 'Silica films'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

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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2

Maier, Wilhelm F., Michael Wiedorn, and Herbert O. Schramm. "Microporous Silica Films." Angewandte Chemie International Edition in English 30, no. 11 (1991): 1509–10. http://dx.doi.org/10.1002/anie.199115091.

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3

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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4

Deschanels, X., S. Dourdain, C. Rey, et al. "Radiation damages on mesoporous silica thin films and bulk materials." MRS Proceedings 1514 (2013): 69–74. http://dx.doi.org/10.1557/opl.2013.386.

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ABSTRACTMesoporous silicas are highly potential materials for applications in the nuclear field like separation, recycling or nuclear wastes confinement. In this work, the effects of the radiation damage on the mesoporous network were investigated by XRR (X-Rays Reflectivity) and nitrogen adsorption isotherm on respectively mesoporous organized thin films (SBA) and disordered bulk mesoporous materials (Vycor glass). The article attempts to answer the question of the existence of a relationship between the rigidity of the mesoporous silica network, and the behavior of silica materials under irr

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5

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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6

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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7

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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8

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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9

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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10

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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11

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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12

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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13

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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14

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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15

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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16

Breval, E., M. L. Mulvihill, J. P. Dougherty, and R. E. Newnham. "Polyimide-silica microcomposite films." Journal of Materials Science 27, no. 12 (1992): 3297–300. http://dx.doi.org/10.1007/bf01116027.

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17

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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18

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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19

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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20

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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21

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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22

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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23

Guglielmi, M., A. Martucci, R. M. Almeida, et al. "Spinning deposition of silica and silica-titania optical coatings: A round robin test." Journal of Materials Research 13, no. 3 (1998): 731–38. http://dx.doi.org/10.1557/jmr.1998.0092.

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A round robin test has been performed on sol-gel processing for the deposition of silica and silica-titania films on silicon substrates by spin-coating. Three solution preparation processes for silica coatings and three for silica-titania coatings were used to prepare samples at each of the participating laboratories. The films have been characterized mainly by thickness (profilometry and ellipsometry measurements), refractive index, porosity, and optical scattering. Different processes gave different thicknesses. Thickness differences were found in films prepared by the same process and by th

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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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Zhang, Junrui, Guojun Jiang, Tianhao Huang, Jun Xie, and Da Shi. "Preparation and characterization of polyurethane–silica hybrid films." Pigment & Resin Technology 48, no. 5 (2019): 357–62. http://dx.doi.org/10.1108/prt-03-2019-0029.

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Purpose The paper aims to provide a facile approach to the synthesis of polyurethane–silica nanocomposites by introducing self-made aqueous silica sols with different particle sizes into polyurethane materials. This paper investigates the effects of the silica nanoparticles on the polyester polyol, as well as the physical properties and transmittance of the hybrid polyurethane coatings. Design/methodology/approach Colloidal silica particles of different sizes were obtained using a sol–gel process and were then embedded into polyester polyol by in-situ polymerization. These polyester polyol–sil

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26

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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27

Yoon, Seo Young, Sung-Eun Choi, and Jin Seok Lee. "Liquid Phase Deposition of Silica on the Hexagonally Close-Packed Monolayer of Silica Spheres." Journal of Nanomaterials 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/510524.

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Liquid phase deposition is a method used for the nonelectrochemical production of polycrystalline ceramic films at low temperatures, most commonly silicon dioxide films. Herein, we report that silica spheres are organized in a hexagonal close-packed array using a patterned substrate. On this monolayer of silica spheres, we could fabricate new nanostructures in which deposition and etching compete through a modified LPD reaction. In the early stage, silica spheres began to undergo etching, and then, silica bridges between the silica spheres appeared by the local deposition reaction. Finally, th

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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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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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30

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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He, Chun Qing, K. Ito, Toshitaka Oka, Yoshinori Kobayashi, Toshiyuki Ohdaira, and Ryoichi Suzuki. "Argon Plasma Decomposition of Porogen in Mesoporous Silica Films Studied by Positron Annihilation." Materials Science Forum 733 (November 2012): 193–96. http://dx.doi.org/10.4028/www.scientific.net/msf.733.193.

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Mesoporous silica films on Si wafers were prepared via a sol-gel process using a triblock copolymer as the structural template. Spin-coated films were dried and subsequently subjected to Ar plasma treatments for decomposing the polymeric porogen. Mesopore formation in the silica film upon Ar plasma treatments was investigated by positron annihilation lifetime spectroscopy. In comparison with calcined silica film, much larger pores, more heterogeneous in size were found in silica film prepared with Ar plasma decomposition of the porogen.

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Innocenzi, Plinio, Luca Malfatti, Barbara Lasio, et al. "Sol–gel chemistry for graphene–silica nanocomposite films." New J. Chem. 38, no. 8 (2014): 3777–82. http://dx.doi.org/10.1039/c4nj00535j.

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Petkov, N., S. Mintova, B. Jean, T. Metzger, and T. Bein. "Functionalized cubic mesostructured silica films." Materials Science and Engineering: C 23, no. 6-8 (2003): 827–31. http://dx.doi.org/10.1016/j.msec.2003.09.134.

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Urbanova, Veronika, and Alain Walcarius. "Vertically-aligned Mesoporous Silica Films." Zeitschrift für anorganische und allgemeine Chemie 640, no. 3-4 (2013): 537–46. http://dx.doi.org/10.1002/zaac.201300442.

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Domansky, Karel, Jun Liu, Li-Qiong Wang, Mark H. Engelhard, and Suresh Baskaran. "Chemical sensors based on dielectric response of functionalized mesoporous silica films." Journal of Materials Research 16, no. 10 (2001): 2810–16. http://dx.doi.org/10.1557/jmr.2001.0387.

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Dielectric response of mesoporous silica films was monitored as a function of several gas-phase chemical species. The effects of humidity, ammonia, and methane on dielectric constant and dissipation factor of films subjected to different chemical treatments are described. Dielectric constant and dissipation factor of partially dehydroxylated films were found to be highly sensitive to both water vapor and ammonia in air. The capacitive devices based on mesoporous silica films show potential for use in chemical sensors.

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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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37

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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Astuti, Yayuk, R. A. Yunita Suci Rahayu, and Arnelli Arnelli. "Synthesis, Characterization, and Antibacterial Activity Test of Geothermal Silica/AgNO3 Thin Film." Molekul 18, no. 2 (2023): 186. http://dx.doi.org/10.20884/1.jm.2023.18.2.6431.

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Geothermal silica waste offers convenient, economical, and environmentally friendly material with high hydrophobicity to produce thin films. Silica-thin films from geothermal waste using the sol-gel method, though, no addition of AgNO3 was conducted for antibacterial functions. This study aims to produce silica-thin films from geothermal waste with the addition of AgNO3 and analyze the antibacterial activity. The procedures carried out in this research were (i) an acid leaching process using HNO3; (ii) the production of silica thin film with and without the addition of AgNO3; (iii) thin film c

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Purcar, Violeta, Valentin Rădiţoiu, Florentina Monica Raduly, et al. "Investigation of Hybrid Films Based on Fluorinated Silica Materials Prepared by Sol–Gel Processing." Coatings 12, no. 10 (2022): 1595. http://dx.doi.org/10.3390/coatings12101595.

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In this research, fluorinated silica materials were prepared through sol–gel processing with tetraethylorthosilicate (TEOS), triethoxymethylsilane (MTES), and trimethoxyhexadecylsilane (HDTMES), using a fluorinated solution (FS) under acidic medium. The fluorinated solution (FS) was obtained by diluting the perfluorooctanoic acid (PFOA) in 2-propanol. These fluorinated sol–gel silica materials were placed on the glass surfaces in order to achieve the antireflective and hydrophobic fluorinated hybrid films. The structure and surface properties of the final samples were investigated by Fourier t

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Niilisk, Ahti, Mart Moppel, Martti Pärs, et al. "Structural study of TiO2 thin films by micro-Raman spectroscopy." Open Physics 4, no. 1 (2006): 105–16. http://dx.doi.org/10.1007/s11534-005-0009-3.

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AbstractThe Raman spectroscopy method was used for structural characterization of TiO2 thin films prepared by atomic layer deposition (ALD) and pulsed laser deposition (PLD) on fused silica and single-crystal silicon and sapphire substrates. Using ALD, anatase thin films were grown on silica and silicon substrates at temperatures 125–425 °C. At higher deposition temperatures, mixed anatase and rutile phases grew on these substrates. Post-growth annealing resulted in anatase-to-rutile phase transitions at 750 °C in the case of pure anatase films. The films that contained chlorine residues and w

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Xu, Wen Cai, Dong Li Li, Ya Bo Fu, and Ya Jun Wang. "Influence of Nano-Silica on Solvent Absorption in Polypropylene Packaging." Applied Mechanics and Materials 117-119 (October 2011): 1061–66. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1061.

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In this paper, the influence of nano-silica on adsorption behavior of solvent in polypropylene packaging is reported. A principle of reducing solvent residue in polypropylene packaging was explored through analyses of changes of crystallization behavior, polarity, and solubility parameters of nano-silica /polypropylene composites. The results showed that the value of solvent residue in modified polypropylene films was reduced about 50%. Therefore nano-silica modified polypropylene films with lower solvent adsorption are in accordance with food safety.

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Li, Zehao, Hui Li, Muxi Wang, et al. "Preparation and Properties of Poly (butylene adipate-co-terephthalate)/thermoplastic Hydroxypropyl Starch Composite Films Reinforced with Nano-Silica." Polymers 15, no. 9 (2023): 2026. http://dx.doi.org/10.3390/polym15092026.

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The use of biodegradable plastics is gradually increasing, but its expensive cost limits promotion. In this study, poly(butylene adipate-co-terephthalate)/thermoplastic hydroxypropyl starch reinforced with nano-silica (PBAT/TPHSg-SiO2) composite films with high hydroxypropyl starch content were prepared in a two-step process. The effect of reinforced thermoplastic hydroxypropyl starch on the mechanical, thermal, processing properties, and micromorphology of the composite films was investigated. The results showed that the tensile strength of the composite films was significantly improved by th

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Moon, Kwan, Boknam Chae, Ki Kim, Seung Lee, and Young Jung. "Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups." Polymers 11, no. 3 (2019): 489. http://dx.doi.org/10.3390/polym11030489.

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Polyimide (PI) composite films with thicknesses of approximately 100 µm were prepared via a sol–gel reaction of 3-aminopropyltrimethoxysilane (APTMS) with poly(amic acid) (PAA) composite solutions using a thermal imidization process. PAA was synthesized by a conventional condensation reaction of two diamines, 3,5-diaminobenzoic acid (DABA), which has a carboxylic acid side group, and 2,2′-bis(trifluoromethyl)benzidine (TFMB), with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) in N,N-dimethylacetamide (DMAc). The PAA–silica composite solutions were prepared by mixing PAA with carbo

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Thakur, Digvijay B., R. M. Tiggelaar, K. Seshan, J. G. E. Gardeniers, and L. Lefferts. "Synthesis of Carbon Nanofibers as Support Layer for Metal Catalyst in a Microreactor for Three-Phase Reactions." Advances in Science and Technology 54 (September 2008): 231–36. http://dx.doi.org/10.4028/www.scientific.net/ast.54.231.

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Carbon Nanofibers (CNF) layers were synthesized nickel-based thin-films on flat fused silica substrates. CNF synthesis was performed via thermal catalytic chemical vapor deposition of ethylene using nickel as metal catalyst. Different underlayer metal thin films, viz. titanium, tantalum and titanium-tungsten were tested in order to obtain stable and well-attached CNF films on fused silica substrates. It is found in case of titanium CNFs are formed on the nickel, but due to severe Ni/Ti inderdiffusion the titanium film looses its adhesive function, as a consequence of which the formed CNF film

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Kuts, Roman I., Victor P. Korolkov, Ruslan V. Shimansky, Vladimir N. N. Khomutov, and Anatoly I. Malyshev. "SUBSTRATE MATERIAL INFLUENCE ON THE THERMOCHEMICAL LASER WRITING OF DIFFRACTIVE STRUCTURES ON ZIRCONIUM FILMS." Interexpo GEO-Siberia 8, no. 1 (2020): 153–59. http://dx.doi.org/10.33764/2618-981x-2020-8-1-153-159.

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The paper is devoted to comparing the features of the formation of oxide microstructures during direct laser writing on thin (100 nm) zirconium films deposited on glass and fused silica substrates to identify the most stable and predicted writing modes. The presence of self-induced oxide quasiperiodic structures was detected during continuous laser writing on zirconium films deposited on glass substrates. The effect of the formation of nanostructures, which are parallel cracks in the oxide layer and have a period equal to the recording step (250-500 nm), formed during the writing process on zi

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Pilic, Branka, Tanja Radusin, Ivan Ristic, et al. "Hydrophobic silica nanoparticles as reinforcing filler for poly (lactic acid) polymer matrix." Chemical Industry 70, no. 1 (2016): 73–80. http://dx.doi.org/10.2298/hemind150107015p.

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Properties of poly (lactic acid) (PLA) and its nanocomposites, with silica nanoparticles (SiO2), as filler were investigated. Neat PLA films and PLA films with different percentage of hydrophobic fumed silica nanoparticles (0.2, 0.5, 1, 2, 3 and 5 wt. %) were prepared by solution casting method. Several tools were used to characterize the influence of different silica content on crystalline behavior, and thermal, mechanical and barrier properties of PLA/SiO2 nanocomposites. Results from scanning electron microscope (SEM) showed that the nanocomposite preparation and selection of specific hydro

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Ginley, D. S., M. A. Mitchell, J. F. Kwak, E. L. Venturini, R. J. Baughman, and W. Fu. "Freestanding thick films of YBa2Cu3O6.9 by screenprinting techniques." Journal of Materials Research 4, no. 3 (1989): 501–3. http://dx.doi.org/10.1557/jmr.1989.0501.

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Thick (20–300 μm) freestanding polycrystalline films of ceramic YBa2Cu3O6.9 have been obtained by resintering YBa2Cu3O6.9 powder in air after screen printing onto fused silica substrates. An interfacial reaction occurs between the powder and the silica substrate which efficiently detaches the resintered film upon cooling. The magnetization and transport properties of these films are comparable to those for high quality bulk ceramic samples.

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Kumar, V. V. Siva, and D. Kanjilal. "Enhancement in visible luminescence from nanocomposite ZnO-SiOx thin films due to annealing." Functional Materials Letters 07, no. 02 (2014): 1450007. http://dx.doi.org/10.1142/s1793604714500076.

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The annealing induced enhancement in visible photoluminescence (PL) from nanocomposite (nc) ZnO – SiO x thin films was investigated. Nc ZnO – SiO x thin films consisting of ZnO nanocrystals in silica matrix were grown by depositing the films using radio frequency (rf) reactive co-sputtering and post-annealing them at temperatures of 350°C and 500°C in high vacuum and air. These films were characterized by Fourier transform infrared (FTIR), (PL) spectroscopy and UV–Vis spectrophotometry measurements. Thin films were also deposited on transmission electron microscopy (TEM) grids in almost identi

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Li, Shun, Jia Chen Liu, Chao Liang Cui, and Li Bin Liu. "Effect of Deposition Conditions on TiO₂ Thin Film on Silica Glass Fibers by Liquid Phase Deposition." Key Engineering Materials 336-338 (April 2007): 1921–23. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1921.

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Crystalline TiO2 thin films coated on silica glass fibers and nano-powders were prepared by adding H3BO3 into an (NH4)2TiF6 solution supersaturated with anatase nano-crystalline TiO2 at 40°C. The effect of the deposition conditions on the surface morphology, section morphology, growth patterns, thicknesses of the deposited TiO2 thin films were investigated. Growth rate and particle size of the thin films were controlled by the deposition conditions. As a result, a well-combined and durable TiO2 thin films on silica glass fibers surface obtained under definite optimizing experimental conditions

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MA, GUANGPENG, JIANRU HAN, CHANGHONG YANG, et al. "STRUCTURE AND CHARACTERIZATION OF ZnO THIN FILM PREPARED BY SPIN COATING." Surface Review and Letters 13, no. 01 (2006): 13–15. http://dx.doi.org/10.1142/s0218625x06007779.

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ZnO thin films were prepared on silica glass substrates by a sol–gel spin coating technique. The thickness of the films was about 200 nm. At 370 nm in the ultraviolet region, there is a sharp absorption edge that corresponds to the ZnO intrinsic band gap of 3.30 eV. The structural properties of the films were examined by X-ray diffraction, which demonstrates that the ZnO films were c-axis oriented. From the infrared spectrum, we conclude that ZnO was deposited on silica glass substrates through a high temperature process at 700°C.

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