SrTiO3 Functional Ceramics Thin Film Prepared by Self-Assembled Monolayers with PTCS Substrate Functionalization

This article used PTCS to dispose the self-assembled substrate, and prepared the precursor by the ratio of AHFT / SN / BA = 1:1:3 and then immersed the functionalized substrate into the precursor supersaturated solution. With the colloidal particles absorption induced by SAMs, SrTiO3 thin film was prepared by the self-assembled monolayers with liquid phase deposition method. The effects of the time of UV radiation and the time of PTCS immersion on the substrate contact angle were studied and the time of UV radiation had an effect on the substrate functionalization after PTCS immersion. The results showed that the first UV radiation for 25 min, PTCS immersion for 7 min and the second UV radiation for 30 min were beneficial to the crystallization of SrTiO3. XRD and AFM were used to characterize the thin film physical phase and surface morphology at 600oCwith annealing and heat retaining for 2 hours. The results also showed that under the same condition, the SrTiO3 crystals on the thin film surface had the clear outline and the spherical crystals were distributed regularly and evenly.

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BaTiO3 Functional Ceramics Thin Film Prepared by Self-Assembled Monolayers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.105-106.266 ◽

2010 ◽

Vol 105-106 ◽

pp. 266-269

Author(s):

Guo Qiang Tan ◽

Cheng Zhang ◽

Hong Yan Miao ◽

Hui Jun Ren ◽

Ao Xia

Keyword(s):

Thin Film ◽

Deposition Temperature ◽

Precursor Solution ◽

The Self ◽

Self Assembled Monolayers ◽

Si Substrate ◽

Ph Values ◽

Batio3 Film ◽

Assembled Monolayers ◽

Self Assembled

BaTiO3 thin film was prepared by the self-assembled monolayers technique and liquid phase deposition. The effects of pH values and the deposition temperature on the formation of BaTiO3 film were studied. The results showed that the Si substrate was in the precursor solution with 0.025mol/L (AHFT/BN/BA=1:1:3) and pH= 1.5. At 45°C deposited for 8h and annealed at 600°C for 2h, the BaTiO3 film with higher crystalline was prepared on the functionalized Si substrate. XRD and SEM tests showed that the film deposited in the precursor solution with different pH values appeared BaTiO3 characteristic peaks on the surface of every crystal. As pH values increased to 1.5 from 0.5, the strength of the film diffraction peak increased. But the width of the peak became smaller and the crystalline increased. When pH value was 2, due to the self-polymerized deposition of [Ti(OH)6]2-, it was easy to form the larger particles on the substrate. When the deposition temperature was 45°C, the acicular BaTiO3 film formed with the regular order and homogeneous planeness on the substrate. When the deposition temperature was between 55°C and 60°C, the dewatering and polymerizing speed between [Ti(OH)6]2- ions was higher than that between [Ti(OH)6]2- and -OH. The adsorption of the film to the Si substrate was weakened. It was easy for the film to fall off.

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Infrared Studies of Novel Optically Responsive Materials: Orientation Characteristics of Sulfonated Polystyrene/Poly(Diallyldimethylammonium Chloride) Ionic Polymer Multilayers on Patterned Self-Assembled Monolayers

Applied Spectroscopy ◽

10.1366/0003702971940738 ◽

1997 ◽

Vol 51 (4) ◽

pp. 470-476 ◽

Cited By ~ 13

Author(s):

Vasilis G. Gregoriou ◽

Rick Hapanowicz ◽

Sarah L. Clark ◽

Paula T. Hammond

Keyword(s):

Film Surface ◽

Polymeric Materials ◽

Surface Characteristics ◽

Self Assembled Monolayers ◽

Sulfonated Polystyrene ◽

Responsive Materials ◽

Diallyldimethylammonium Chloride ◽

Assembled Monolayers ◽

Self Assembled ◽

Patterned Films

Polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) is utilized in the characterization of a new class of polymeric materials that exhibit unique optical properties. The differential nature of PM-IRRAS, coupled with the fact that the experiment was performed on a commercially available hardware setup, makes the technique ideal for studying selectively deposited polyion multilayers on metal surfaces. The system under study was a polymeric thin film of alternating bilayers of sulfonated polystyrene/poly(diallyldimethylammonium chloride) (SPS/PDAC) fabricated by ionic multilayer assembly. Specifically, patterned self-assembled monolayers (SAMs) of (Ω-functionalized alkane thiolates were used as the molecular template. Alternating layers of polyanion and polycation were then selectively adsorbed onto specific regions of the surface to form a patterned films of thicknesses from 150 to 400 Å. The total thickness of the film was measured at 150 Å with the use of ellipsometry. Polyion conformation plays a crucial role in the selectivity of the patterned film, film surface characteristics, and ultimately, the ability of these systems to function as optical devices. The infrared spectroscopic data give insight into chemical composition and conformation and show that the molecular orientation of polyions in these polymeric multilayer structures depends on the ionic content of the initial solutions.

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