scholarly journals Conductive Layers Based on Silver Nanowires by Spray Coating Process

2020 ◽  
Vol 71 (8) ◽  
pp. 136-147
Author(s):  
Junaidi ◽  
Nur Asriyani ◽  
Simon Sembiring ◽  
Posman Manurung ◽  
Sutopo Hadi
Keyword(s):  
Thin Films ◽  
Optical Conductivity ◽  
Energy Gap ◽  
Silver Nanowires ◽  
Spray Coating ◽  
Coating Process ◽  
Sem Images ◽  
Number Of Layers ◽  
Section Technique ◽  
Layer Resistance

In this research, a thin film of silver nanowires (AgNWs) is made by varying the number of layers onto a polycarbonate substrate using a spray coating process. AgNWs were obtained via the polyol method using silver nitrate (AgNO3) as rare materials, Polyvinyl pyrrolidone (PVP) as a reducing agent and ethylene glycol (EG) as a solvent. The coating material used is AgNWs solution with a concentration of 10% in ethanol, which has a diameter and length of 176.13 nm and 28.58 �m, respectively. The optical conductivity for third layers were 1.80 � 105 S.m−1,1.98 � 105 S.m−1, and 2.32 � 105 S.m−1 by the gap energy of 3.84 eV, 3.81 eV, and 3.79 eV at a wavelength of 550 nm. The greater the number of layers, the higher the optical conductivity. The smaller energy gap indicates that the material absorbs more energy, so the absorbance value is higher. The sheet resistance of AgNWs thin films in variations of each layer was 119.2 Ω.sq−1, 20.6 Ω.sq−1 and 4.98 Ω.sq−1. The lower the layer resistance, the higher the density of AgNWs and the thicker the layer. Based on the SEM images by cross-section technique, the thickness of AgNWs thin films obtained by 44.244 μm, 69.126 μm, and 100.028 μm for each layer. AgNWs thin films could be used as transparent conductive electrodes for optoelectronic applications.

Deposition of Ag 2~6 mol%-Doped ZnO Photocatalyst Thin Films by Thermal Spray Coating Method for E.coli Bacteria Degradation

2015 ◽  
Vol 827 ◽  
pp. 3-6 ◽  
Author(s):  
Heri Sutanto ◽  
Iis Nurhasanah ◽  
Eko Hidayanto
Keyword(s):  
Thin Films ◽  
Thermal Spray ◽  
Sol Gel ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Alcoholic Solution ◽  
Sem Images ◽  
E Coli ◽  
Coating Method ◽  
Temperature Deposition

ZnO doped with 2~6 mol% Silver (Ag) photocatalyst thin films has been deposited on glass substrate by thermal spray coating with temperature deposition of 250°C. A gel of ZnO:Ag precursor has been synthesized by sol-gel route from aqueous/alcoholic solution of zinc acetate dehydrate and silver nitrate mixture at room temperature. The morphology of ZnO:Ag films were investigated scanning electron microscopy (SEM). 3D SEM images of ZnO:Ag thin films show the rough morphology with roughness mean square (rms) of 150 to 195 nm. The grain size of ZnO:Ag films were found in the range 76,5 to 304,8 nm. The photoactivity examination of ZnO:Ag photocatalyst films show the E. Coli bacteria degraded up to 99.99% under sunlight irradiation for 4 hours.

Anode-Supported SOFCs with Electrolyte Thin Films Prepared by Spray Coating

2009 ◽  
Vol 631-632 ◽  
pp. 319-324
Author(s):  
Chang Sheng Ding ◽  
Hong Fei Lin ◽  
Kazuhisa Sato ◽  
Yoshifumi Tsutai ◽  
Mabito Iguchi ◽  
...  
Keyword(s):  
Thin Films ◽  
Operating Temperature ◽  
Spray Coating ◽  
Electrical Performance ◽  
Coating Process ◽  
Preparation Process ◽  
Doped Ceria ◽  
Maximum Power Density ◽  
Electrolyte Film ◽  
Coating Method

Dense gadolinium doped ceria (GDC) electrolyte thin films were prepared on porous NiO-GDC substrates by spray coating process. Microstructure of the GDC thin films and effect of preparation process on the microstructure were examined. SEM results show that uniform and dense GDC thin films with a thickness of approximately 1 μm were successfully prepared on porous NiO-GDC anodes. Anode-supported single cell with the thin GDC electrolyte film was tested using humidified hydrogen as a fuel, and exhibited relatively high electrical performance at low operating temperature (the maximum power density of 135 mW/cm2 at 600 °C). This means that the thin GDC film may be applicable to an electrolyte for anode-supported SOFCs. The experimental results suggest that the spray coating method developed in this study may offer a useful route for preparing thin and dense electrolytes of SOFCs.

scholarly journals Structural and Optical Properties of Nanostructured Bismuth Oxide

2014 ◽  
Vol 34 ◽  
pp. 64-72 ◽  
Author(s):  
Reem Sami Ali
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Bismuth Oxide ◽  
Energy Gap ◽  
Structural And Optical Properties ◽  
Direct Transition ◽  
Optical Studies ◽  
Polycrystalline Structure ◽  
Optical Energy Gap ◽  
Sem Images

Thin films of bismuth oxide have been prepared utilizing vacuum evaporation. XRD anyalysis reveal that all the films were tetragonal polycrystalline structure with a preferred orientation along (002) plane. SEM images indicate that the grain size fall in the category of nanosize. AFM results assure that the nanonstructure behavior of thin films. Optical studies show that these films have a direct transition with optical energy gap equal to 2.5 eV.

Influence of Annealing Temperature on Structural, Morphological, Optical and Electrical Properties of Sol-Gel SnO2 Thin Films

2018 ◽  
Vol 52 ◽  
pp. 15-20 ◽  
Author(s):  
Ji Tao Li ◽  
Ding Yu Yang ◽  
Xing Hua Zhu ◽  
Xu Li ◽  
Shu Qi Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Raw Materials ◽  
Sol Gel ◽  
Optical Energy Gap ◽  
Sem Images ◽  
Rutile Structure ◽  
Chloride Dihydrate

SnO2 thin films were prepared on glass substrates by sol-gel spin coating method using stannous chloride dihydrate and ethyl alcohol absolute as raw materials at annealing temperature 450-550 °C. The crystal phase was measured by X-ray diffraction (XRD) and showed tetragonal rutile structure with a preferential orientation of (110). Atomic force microscope (AFM) and Scanning Electron Microscope (SEM) images revealed the homogeneous grains distribution, and SEM images showed the obvious rectangular objects corresponding to tetragonal structure. Optical properties were observed by the transmittance in ultraviolet-visible (UV-Vis) region and optical energy gap, which revealed the transmittance over 75% and energy gap between 3.84 eV and 3.89 eV. Finally, I-V characteristics were tested to research electrical properties, and found the gradual non-linear property and the increase of resistance.

Utilization of Natural Porphyrin Thin Films as a Photosensitizer for Photodetectors

2014 ◽  
Vol 896 ◽  
pp. 187-191 ◽  
Author(s):  
Utari ◽  
Atmanto Heru Wibowo ◽  
Budi Purnama ◽  
Kamsul Abraha
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spin Coating ◽  
Printed Circuit Board ◽  
Energy Gap ◽  
Circuit Board ◽  
Printed Circuit ◽  
Number Of Layers ◽  
Maximum Current ◽  
Sensitive Characteristics

In this study, photodetectors were assembled using natural porphyrin as a sensitizer, and their energy gap properties were investigated. The natural porphyrin thin film layered devices used in the experiments were deposited by spin coating on a patterned electrode of Cu printed circuit board substrates. The photo sensitive characteristics were measured both with and without illumination by white light. The photo sensitive effect increased with the number of layers. A maximum current of 2.6 nA was obtained when the films consisted of three layers and the current increased to 7.9 nA for seven layers. To clarify the results, the dependence of the number of layers on the energy gap was evaluated. The experiment results showed that the energy gap decreased linearly with increasing number of layers. The mutual combination of the photo sensitive effect and energy gap indicated that it is possible to apply natural porphyrin as a sensitizer for photodetector applications.

scholarly journals Ag Doped ZnO Thin Films Synthesized by Spray Coating Technique for Methylene Blue Photodegradation under UV Irradiation

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Heri Sutanto ◽  
Singgih Wibowo ◽  
Iis Nurhasanah ◽  
Eko Hidayanto ◽  
H. Hadiyanto
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Doping Concentration ◽  
Uv Light ◽  
Irradiation Time ◽  
Spray Coating ◽  
Zno Thin Films ◽  
Sem Images ◽  
Ag Doping ◽  
Coating Technique

Silver (Ag) substituted ZnO thin films were successfully deposited onto glass substrates by spray coating technique. Structure, morphology, and optical properties were evaluated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and UV-Vis spectrophotometer, respectively. XRD spectra had polycrystalline wurtzite structure; SEM images showed that thin films had different surface morphology at different Ag doping concentration. From transmittance spectra, thin films transparency decreased as well as band gap energy along with increase of Ag doping concentration. Methylene blue (MB) solution was used as a pollutant in the photodegradation studies. Under UV light irradiation, the optimal Ag doping is 25%, with 83% of the decolorizing efficiencies after 3 h irradiation time and apparent constant (kapp) about 9.69 × 10−3 min−1.

Influence of Carrier Gas Pressure on the Physical Properties of CdO Thin Films

2019 ◽  
Vol 233 (7) ◽  
pp. 913-932
Author(s):  
M. Anitha ◽  
V. Tamilnayagam ◽  
N. Anitha ◽  
Tamiloli Devendhiran ◽  
Keerthika Kumarasamy ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Cadmium Oxide ◽  
Emission Spectra ◽  
Gas Pressure ◽  
Sem Images ◽  
Carrier Gas ◽  
Cdo Thin Films

Abstract Conducting cadmium oxide (CdO) thin film samples were deposited on amorphous glass substrates at the optimized substrate temperature (200 °C) as a function of carrier gas pressure (10.8, 12.7, 14.7, 16.7 and 18.6 × 104 N m−2 respectively) by spray pyrolysis technique using nebulizer. XRD results showed that all the CdO thin films were polycrystalline in nature along with cubic structure. The scanning electron microscopy (SEM) images revealed that all the thin films had a sphere like grains without any cracks. The elemental composition of the film is analyzed with EDAX spectrum formed in stochiometric range. Direct energy gap values were found to be had decreased from 2.46 to 2.42 eV as the function of carrier gas pressure had increased from 10.8 to 14.7 × 104 (N m−2) and the energy gap increased further. All the as deposited samples of Cd–O vibration bond (690 cm−1) were confirmed by FTIR spectrum. PL emission spectra revealed that all the CdO thin films exhibit a strong emission (green) peak at 520 nm. High carrier concentration (2.88 × 1019 cm−3), low resistivity (4.76 × 10−3 Ω cm) and high figure of merit (25.0 × 10−3) were observed for 14.7 × 104 (N m−2) carrier gas pressure of CdO thin film.

scholarly journals Silver Nanowires Inks for Flexible Circuit on Photographic Paper Substrate

Micromachines ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 22
Author(s):  
Xing Yang ◽  
Dexi Du ◽  
Yuehui Wang ◽  
Yuzhen Zhao
Keyword(s):  
Room Temperature ◽  
Solvothermal Method ◽  
Silver Nanowires ◽  
Coating Process ◽  
Paper Substrate ◽  
Photographic Paper ◽  
Number Of Layers ◽  
Length Range ◽  
Conductive Fillers ◽  
Flexible Applications

Silver nanowires (AgNWs) have inspired many research interests due to their better properties in optical, electric, and flexible applications. One such exploitable use is as the electrical conductive fillers for print electronics. In this paper, AgNWs with mean a diameter of 80 nm and mean length of 13.49 μm were synthesized using the polyol solvothermal method. A sonication-induced scission process was used to obtain AgNWs with a length range of 7.64–11.21 μm. Further AgNWs inks were prepared with the as-synthesized AgNWs as conductive fillers in anhydrous ethanol. The conductive inks were coated on resin coated photographic paper substrate using the knife coating process and dried at room temperature. The effects of the number of layers of AgNWs coating, the concentration of AgNWs, and the length of AgNWs on the microstructure and electrical properties of samples were investigated by scanning electron microscopy and using the four-point probe method. The results show that the conductivity of the AgNWs coating increases with the increase in the number of layers in the AgNWs coating, concentration and length of the AgNWs.

Far infrared evidence: The real part of the optical conductivity below the superconducting energy gap of BiSrCaCuO thin films

1991 ◽  
Vol 185-189 ◽  
pp. 953-954 ◽  
Author(s):  
Masayuki Sato ◽  
Keigo Nagasaka ◽  
Masaru Ihara ◽  
Takafumi Kimura ◽  
Hiroshi Nakao
Keyword(s):  
Thin Films ◽  
Optical Conductivity ◽  
Energy Gap ◽  
Far Infrared ◽  
The Real ◽  
Superconducting Energy Gap

scholarly journals Rootlike Morphology of ZnO:Al Thin Film Deposited on Amorphous Glass Substrate by Sol-Gel Method

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Heri Sutanto ◽  
Sufwan Durri ◽  
Singgih Wibowo ◽  
Hady Hadiyanto ◽  
Eko Hidayanto
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Band Gap ◽  
Glass Substrate ◽  
Optical Band Gap ◽  
Sol Gel ◽  
Spray Coating ◽  
Hexagonal Structure ◽  
Zno Films ◽  
Sem Images

Zinc oxide (ZnO) and aluminum doped zinc oxide (ZnO:Al) thin films have been deposited onto a glass substrate by sol-gel spray coating method at atmospheric pressure. X-ray diffractometer (XRD), scanning electron microscopy (SEM), and UV-Vis spectrophotometer have been used to characterize the films. XRD spectra indicated that all prepared thin films presented the wurtzite hexagonal structure. SEM images exhibited rootlike morphology on the surface of thin films and the shortest root diameter was about 0.219 μm. The UV-Vis absorption spectra exhibited the absorption edges that were slightly shifted to the lower wavelength. From this result, the incorporation of aluminum into the ZnO involved a slight increase in the optical band-gap of films. The optical bands of films were 3.102 eV, 3.115 eV, 3.118 eV, 3.115 eV, 3.109 eV, and 3.109 eV for ZnO, ZnO:Al 2%, ZnO:Al 4%, ZnO:Al 6%, ZnO:Al 8%, and ZnO:Al 10%, respectively. Increase of Al doping concentration in ZnO films contributed to the increase of their optical band-gap which can be explained by the Burstein-Moss effect.

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