Leflunomide Loaded Chitosan Nanoparticles for the Preparation of Aliphatic Polyester Based Skin Patches

In the present study, the preparation of controlled-released leflunomide (LFD)-loaded skin patches was evaluated, utilizing the combination of chitosan (CS) nanoparticles (NPs) incorporated into suitable poly(l-lactic acid) (PLLA) or poly(lactic-co-glycolic acid) (PLGA) polyester matrices. Initially, LFD-loaded CS NPs of ~600 nm and a smooth surface were prepared, while strong inter-molecular interactions between the drug and the CS were unraveled. In the following step, the prepared LFD-loaded CS NPs were incorporated into PLLA or PLGA, and thin-film patches were prepared via spin-coating. Analysis of the prepared films showed that the incorporation of the drug-loaded CS NPs resulted in a significant increase in the drug’s release rate and extent as compared to neat LFD-loaded polyester patches (i.e., prepared without the use of CS NPs). In-depth analysis of the prepared formulations showed that the amorphization of the drug within the matrix and the increased wetting properties of the prepared CS NPs were responsible for the improved thin-film patch characteristics.

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Diffraction effects from inclined grain boundaries in polycrystalline thin foils

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109240 ◽

1978 ◽

Vol 36 (1) ◽

pp. 420-421

Author(s):

C.B. Carter ◽

A.M. Donald ◽

S.L. Sass

Keyword(s):

Thin Film ◽

Grain Boundaries ◽

Boundary Plane ◽

Foil Surface ◽

Thin Foils ◽

The Matrix ◽

Firm Basis ◽

Diffraction Patterns ◽

Wave Matching ◽

Diffraction Effects

Using thin-film gold bicrystals with the boundary plane parallel to the foil surface, it has been shown(l,2) that networks of grain boundary dislocations can act as diffraction gratings and give rise to subsidiary reflections close to the matrix reflections in electron diffraction patterns. Recently several groups of workers(3-5) have shown that inclined boundaries in polycrystalline specimens also produce extra reflections which may be due to the periodic nature of the boundaries. In general grain boundaries in polycrystalline specimens will be steeply inclined to the foil surface and additional reflections due to wave matching at the boundary(6) will also be present. The diffraction technique has the potential for providing detailed information on the structure of inclined boundaries (see, for example (5)), especially for the case where the image contains no useful information. In order to provide a firm basis for this technique, the geometry of the diffraction effects expected from inclined boundaries and the influence of these effects on the appearance of images will be examined.

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Fabrication of thin film sensors by spin coating using sol-gel LaCrO3 Perovskite material modified with transition metals for sensing environmental pollutants, greenhouse gases and relative humidity

Environmental Challenges ◽

10.1016/j.envc.2021.100043 ◽

2021 ◽

Vol 3 ◽

pp. 100043

Author(s):

Prashant Bhimrao Koli ◽

Kailas Haribhau Kapadnis ◽

Uday Gangadhar Deshpande ◽

Umesh Jagannath Tupe ◽

Sachin Girdhar Shinde ◽

...

Keyword(s):

Thin Film ◽

Relative Humidity ◽

Transition Metals ◽

Greenhouse Gases ◽

Spin Coating ◽

Sol Gel ◽

Environmental Pollutants ◽

Thin Film Sensors ◽

Perovskite Material

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Mo-doped, Cr-Doped, and Mo–Cr codoped TiO2 thin-film photocatalysts by comparative sol-gel spin coating and ion implantation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.01.136 ◽

2021 ◽

Vol 46 (24) ◽

pp. 12961-12980

Author(s):

Amanda Chen ◽

Wen-Fan Chen ◽

Tina Majidi ◽

Bernadette Pudadera ◽

Armand Atanacio ◽

...

Keyword(s):

Thin Film ◽

Ion Implantation ◽

Spin Coating ◽

Tio2 Thin Film ◽

Sol Gel ◽

Codoped Tio2

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Effect of Sr Doping on Structure and Emittance of La1-xSrxMnO3 Smart Thermal Control Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.902 ◽

2014 ◽

Vol 602-603 ◽

pp. 902-905

Author(s):

Yong Jun Shen ◽

Chuan Bin Wang ◽

Ling Li ◽

Qiang Shen ◽

Lian Meng Zhang

Keyword(s):

Thin Film ◽

Smooth Surface ◽

Pulsed Laser ◽

Double Exchange ◽

Thermal Control ◽

Laser Deposition ◽

Lanthanum Manganite ◽

Infrared Emissivity ◽

Control Material ◽

Double Exchange Interaction

Sr-doped lanthanum manganite (La1-xSrxMnO3) is characteristic of thermochromic, which can act as a smart thermal control material used in the variable-emittance devices. In the present study, La1-xSrxMnO3 thin films were prepared on MgO(100) substrates by pulsed laser deposition, and the effect of Sr-doping (x = 0 ~ 0.4) on the structure and infrared emissivity was investigated. Single-phased La1-xSrxMnO3 films with (100)-orientation were obtained, which showed a dense texture with smooth surface. The ratio of Mn4+/Mn3+ in the films was increased with increasing Sr doping, leading to the enhancement in double-exchange interaction and electrical conductivity. As a result, the phase transition from metal to insulator was observed with the increasing of test temperature. For the La0.8Sr0.2MnO3 thin film, a large value of emittance (De = 0.28) was obtained, indicating good variable-emittance by appropriate Sr doping.

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Effect of Spin Coating Speed on the Electrical Performances of Solution-Processed Indium Zinc Oxide Thin-Film Transistors

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2016.13679 ◽

2016 ◽

Vol 16 (12) ◽

pp. 12871-12874 ◽

Cited By ~ 2

Author(s):

Fei Shan ◽

Seung Wook Chang ◽

Jung-Hyuk Koh ◽

Sung-Jin Kim

Keyword(s):

Thin Film ◽

Zinc Oxide ◽

Spin Coating ◽

Thin Film Transistors ◽

Oxide Thin Film ◽

Zinc Oxide Thin Film ◽

Solution Processed ◽

Indium Zinc Oxide

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Formation of a Positive Photoresist Thin Film by Spin Coating: Influence of Atmospheric Humidity

Japanese Journal of Applied Physics ◽

10.1143/jjap.36.7041 ◽

1997 ◽

Vol 36 (Part 1, No. 11) ◽

pp. 7041-7047 ◽

Cited By ~ 1

Author(s):

Toshio Yada ◽

Taro Maejima ◽

Masaru Aoki

Keyword(s):

Thin Film ◽

Spin Coating ◽

Atmospheric Humidity ◽

Positive Photoresist

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Photoconductivity of Nanocomposite MEH-PPV: TiO2 Thin Films

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.13.87 ◽

2011 ◽

Vol 13 ◽

pp. 87-92 ◽

Cited By ~ 1

Author(s):

M.S.P Sarah ◽

F.S. Zahid ◽

M.Z. Musa ◽

U.M. Noor ◽

Z. Shaameri ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Surface Morphology ◽

Spin Coating ◽

Glass Substrate ◽

Spin Coating Technique ◽

Coating Technique ◽

Current Voltage ◽

Current Voltage Characteristics

The photoconductivity of a nanocomposite MEH-PPV:TiO2 thin film is investigated. The nanocomposite MEH-PPV:TiO2 thin film was deposited on a glass substrate by spin coating technique. The composition of the TiO2 powder was varied from 5 wt% to 20 wt% (with 5 wt% interval). The concentration of the MEH-PPV is given by 1 mg/1 ml. The current voltage characteristics were measured in dark and under illumination. The photoconductivity showed increment in value as the composition of the TiO2 is raised in the polymer based solution. The absorption showed augmentation as the amount of TiO2 is increased. The escalation of the current voltage is then supported by the results of surface morphology.

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An investigation of sol–gel spin coating growth of wurtzite GaN thin film on 6H–SiC substrate

Journal of Crystal Growth ◽

10.1016/j.jcrysgro.2014.12.011 ◽

2015 ◽

Vol 413 ◽

pp. 1-4 ◽

Cited By ~ 12

Author(s):

C.Y. Fong ◽

S.S. Ng ◽

F.K. Yam ◽

H. Abu Hassan ◽

Z. Hassan

Keyword(s):

Thin Film ◽

Spin Coating ◽

Sol Gel ◽

Coating Growth

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Preparation of Glass Plate-Supported Nanostructure ZnO Thin Film Deposited by Sol-Gel Spin-Coating Technique and Its Photocatalytic Degradation to Monoazo Textile Dye

Journal of Nanomaterials ◽

10.1155/2008/356765 ◽

2008 ◽

Vol 2008 ◽

pp. 1-5 ◽

Cited By ~ 18

Author(s):

Mohammad Hossein Habibi ◽

Mohammad Khaledi Sardashti

Keyword(s):

Thin Film ◽

Thin Films ◽

Photocatalytic Degradation ◽

Spin Coating ◽

Sol Gel ◽

Glass Plate ◽

Zno Thin Films ◽

Visible Range ◽

Textile Dye ◽

Axis Orientation

Glass plate-supported nanostructure ZnO thin films were deposited by sol-gel spin coating. Films were preheated at275∘Cfor 10 minutes and annealed at 350, 450, and550∘Cfor 80 minutes. The ZnO thin films were transparent ca 80–90% in visible range and revealed that absorption edges at about 370 nm. Thec-axis orientation improves and the grain size increases which was indicated by an increase in intensity of the (002) peak at34.4∘in XRD corresponding to the hexagonal ZnO crystal. The photocatalytic degradation of X6G an anionic monoazo dye, in aqueous solutions, was investigated and the effects of some operational parameters such as the number of layer and reusability of ZnO nanostructure thin film were examined. The results showed that the five-layer coated glass surfaces have a very high photocatalytic performance.

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