scholarly journals Single step fabrication of CuO–MnO–2TiO2 composite thin films with improved photoelectrochemical response

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15885-15893 ◽  
Author(s):  
Khadija Munawar ◽  
Muhammad Adil Mansoor ◽  
Wan Jefrey Basirun ◽  
Misni Misran ◽  
Nay Ming Huang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Trifluoroacetic Acid ◽  
Photocurrent Density ◽  
Single Step ◽  
Composite Thin Film ◽  
Homogeneous Mixture ◽  
Composite Thin Films ◽  
Photoelectrochemical Response

CuO–MnO–2TiO2 composite thin film having a photocurrent density of 2.21 mA cm−2 at +0.7 V has been deposited from a homogeneous mixture of acetates of Cu and Mn and (Ti(O(CH2)3CH3)4) in the presence of trifluoroacetic acid in THF via AACVD at 550 °C.

Effect of Temperature on the Electrical and Gas Sensing Properties of Polyaniline and Multiwall Carbon Nanotube Doped Polyaniline Composite Thin Films

2011 ◽  
Vol 254 ◽  
pp. 167-170 ◽  
Author(s):  
Subodh Srivastava ◽  
Sumit Kumar ◽  
Vipin Kumar Jain ◽  
Y.K. Vijay
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Composite Thin Film ◽  
Effect Of Temperature ◽  
Multiwall Carbon Nanotube ◽  
Film Sensor ◽  
Composite Thin Films ◽  
Pani Composite

In the present work we have reported the effect of temperature on the gas sensing properties of pure Polyaniline (PANI) and Multiwall carbon nanotube (MWNT) doped PANI composite thin film based chemiresistor type gas sensors for hydrogen gas sensing application. PANI and MWNT doped PANI composite were synthesized by in situ chemical oxidative polymerization of aniline using ammonium persulfate in an acidic medium. The thin sensing film of chemically synthesized PANI and MWNT doped PANI composite were deposited onto finger type Cu-interdigited electrodes using spin cast technique to prepared chemiresistor type gas sensor. The electrical properties of these composite thin films were characterized by I-V measurements as function of temperature. The I-V measurement revealed that conductivity of composite thin films increased as the temperature increased. The changes in resistance of the composite thin film sensor were utilized for detection of hydrogen gas. It was observed that at room temperature, MWNT doped PANI composite sensor shows higher response value and sensitivity with good repeatability in comparison to pure PANI thin film sensor. It was also observed that both PANI and MWNT doped PANI composite thin film based sensors showed unstable behavior as the temperature increased. The surface morphology of these composite thin films has also been characterized by scanning electron microscopy (SEM) measurement.

Nitrite ion sensing properties of ZnTiO3–TiO2 composite thin films deposited from a zinc–titanium molecular complex

2015 ◽  
Vol 39 (9) ◽  
pp. 7442-7452 ◽  
Author(s):  
Muhammad Ali Ehsan ◽  
Hamid Khaledi ◽  
Alagarsamy Pandikumar ◽  
Perumal Rameshkumar ◽  
Nay Ming Huang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Molecular Complex ◽  
Composite Thin Film ◽  
Film Electrode ◽  
Nitrite Ion ◽  
Thin Film Electrode ◽  
Composite Thin Films ◽  
Sensing Properties ◽  
Ion Sensing

ZnTiO3–TiO2 composite thin film electrode has been fabricated by AACVD method and tested for electrochemical nitrite ion detection.

scholarly journals X-ray Photoelectron Spectroscopy Analysis of Chitosan–Graphene Oxide-Based Composite Thin Films for Potential Optical Sensing Applications

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 478
Author(s):  
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽  
Yap Wing Fen ◽  
Silvan Saleviter ◽  
Narong Chanlek ◽  
Hideki Nakajima ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Functional Group ◽  
Optical Sensing ◽  
Composite Thin Films ◽  
Cobalt Ions ◽  
X Ray ◽  
Sensing Applications

In this study, X-ray photoelectron spectroscopy (XPS) was used to study chitosan–graphene oxide (chitosan–GO) incorporated with 4-(2-pyridylazo)resorcinol (PAR) and cadmium sulfide quantum dot (CdS QD) composite thin films for the potential optical sensing of cobalt ions (Co2+). From the XPS results, it was confirmed that carbon, oxygen, and nitrogen elements existed on the PAR–chitosan–GO thin film, while for CdS QD–chitosan–GO, the existence of carbon, oxygen, cadmium, nitrogen, and sulfur were confirmed. Further deconvolution of each element using the Gaussian–Lorentzian curve fitting program revealed the sub-peak component of each element and hence the corresponding functional group was identified. Next, investigation using surface plasmon resonance (SPR) optical sensor proved that both chitosan–GO-based thin films were able to detect Co2+ as low as 0.01 ppm for both composite thin films, while the PAR had the higher binding affinity. The interaction of the Co2+ with the thin films was characterized again using XPS to confirm the functional group involved during the reaction. The XPS results proved that primary amino in the PAR–chitosan–GO thin film contributed more important role for the reaction with Co2+, as in agreement with the SPR results.

scholarly journals Deep-Ultraviolet Transparent Conductive MWCNT/SiO2 Composite Thin Film Fabricated by UV Irradiation at Ambient Temperature onto Spin-Coated Molecular Precursor Film

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1348
Author(s):  
Hiroki Nagai ◽  
Naoki Ogawa ◽  
Mitsunobu Sato
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Heat Treatment ◽  
Uv Irradiation ◽  
Composite Thin Film ◽  
Precursor Film ◽  
Mixed Solution ◽  
Pencil Hardness ◽  
Strong Base ◽  
Deep Ultraviolet

Deep-ultraviolet (DUV) light-transparent conductive composite thin films, consisting of dispersed multiwalled carbon nanotubes (MWCNTs) and SiO2 matrix composites, were fabricated on a quartz glass substrate. Transparent and well-adhered amorphous thin films, with a thickness of 220 nm, were obtained by weak ultraviolet (UV) irradiation (4 mW cm−2 at 254 nm) for more than 6 h at 20−40 °C onto the precursor films, which were obtained by spin coating with a mixed solution of MWCNT in water and Si(IV) complex in ethanol. The electrical resistivity of MWCNT/SiO2 composite thin film is 0.7 Ω·cm, and transmittance in the wavelength region from DUV to visible light is higher than 80%. The MWCNT/SiO2 composite thin film showed scratch resistance at pencil hardness of 8H. Importantly, the resistivity of the MWCNT/SiO2 composite thin film was maintained at the original level even after heat treatment at 500 °C for 1 h. It was observed that the heat treatment of the composite thin film improved durability against both aqueous solutions involving a strong acid (HCl) and a strong base (NaOH).

PHOTOELECTROCHEMICAL WATER SPLITTING USING BILAYERED ZnO/SrTiO3 PHOTOELECTRODES

2013 ◽  
Vol 22 ◽  
pp. 545-551 ◽  
Author(s):  
SURBHI CHOUDHARY ◽  
ANJANA SOLANKI ◽  
DIPIKA SHARMA ◽  
NIRUPAMA SINGH ◽  
SUMANT UPADHYAY ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Open Circuit Potential ◽  
Sol Gel ◽  
Photocurrent Density ◽  
Spectroscopic Studies ◽  
Open Circuit ◽  
Photoconversion Efficiency ◽  
Structural Surface

Nanostructured zinc oxide overlayered by nanoporous strontium titanate was synthesized using sol-gel method and tested in a photoelectrochemical (PEC) cell for splitting of water. It was found that compared to the pristine ZnO and SrTiO 3, the resistivity of bilayered thin film was reduced and a negative shift in open circuit potential and flatband potential of bilayered ZnO/SrTiO 3 was observed, thus improving the photocurrent density and photoconversion efficiency. Significantly, bilayered ZnO/SrTiO 3 thin film offered the best photocurrent density i.e. 0.46 mA/cm2 at 0 V/SCE. XRD, SEM and UV-Vis spectroscopic studies were carried out to explore the structural, surface morphological and optical properties of various thin films.

scholarly journals Enhanced Photoelectrochemical Response of Zn-Dotted Hematite

2007 ◽  
Vol 2007 ◽  
pp. 1-6 ◽  
Author(s):  
Saroj Kumari ◽  
Aadesh P. Singh ◽  
Chanakya Tripathi ◽  
Diwakar Chauhan ◽  
Sahab Dass ◽  
...  
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Spray Pyrolysis ◽  
Pore Diameter ◽  
Thermal Evaporation ◽  
Photocurrent Density ◽  
Optimum Thickness ◽  
Thermal Evaporation Method ◽  
Donor Density ◽  
Photoelectrochemical Response

Photoelectrochemical response of thin films ofα-Fe2O3, Zn dopedα-Fe2O3, and Zn dots deposited on dopedα-Fe2O3prepared by spray pyrolysis has been studied. Samples of Zn dots were prepared using thermal evaporation method by evaporating Zn through a mesh having pore diameter of 0.7 mm. The presence of Zn-dotted islands on dopedα-Fe2O3surface exhibited significantly large photocurrent density as compared to other samples. An optimum thickness of Zn dots∼230 Å is found to give enhanced photoresponse. The observed results are analyzed with the help of estimated values of resistivity, band gap, flatband potential, and donor density.

scholarly journals Study of Ruthenium Oxide, Manganese Oxide and Composite (Ru:Mn)O2 thin film Electrodes Assembled by Layer by Layer Spin Coating Method

2016 ◽  
Vol 13 (1) ◽  
pp. 43-49 ◽  
Author(s):  
P. S. Joshi ◽  
D. S. Sutrave
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Manganese Oxide ◽  
Spin Coating ◽  
Composite Films ◽  
Ruthenium Oxide ◽  
Layer By Layer ◽  
Composite Thin Films ◽  
Spin Coating Method ◽  
Coating Method

Ruthenium oxide, Manganese oxide and (Ru:Mn)O2 composite thin films have been prepared by 0.02M Ruthenium chloride and Manganese acetate solutions respectively on stainless steel substrates by sol-gel spin coating method. Layer by layer deposition of RuO2 and MnO2 was done for composite films. RuO2: MnO2 composite thin films have been demonstrated to be an excellent material for Supercapacitor application when evaluated with RuO2 and MnO2 thin film electrodes with respect to XRD, SEM, CV, CP and EIS studies. As a result, high specific capacitance of 515 F/g at 10 mV/s with excellent stability and long cycle life was obtained, where specific power and energy were as high as 15.38 Wh/kg and 4.06 KW/kg respectively with loading weight of 0.13 mg/cm2 .Composite films showed changes in structural and morphological features which was admiring for supercapacitor applications. The electrochemical impedance measurement was carried out in 0.1M KOH in the frequency range 10 to 105 Hz. From the analysis it can be concluded that mixed oxide composites have superior capacitive performance to single transition metal oxides as electrodes.

scholarly journals Exploration on Structural and Optical Properties of Nanocrystalline Cellulose/Poly(3,4-Ethylenedioxythiophene) Thin Film for Potential Plasmonic Sensing Application

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 419
Author(s):  
Nur Syahira Md Ramdzan ◽  
Yap Wing Fen ◽  
Josephine Ying Chyi Liew ◽  
Nur Alia Sheh Omar ◽  
Nur Ain Asyiqin Anas ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Nanocrystalline Cellulose ◽  
Composite Thin Film ◽  
Mercury Ions ◽  
Plasmonic Sensor ◽  
Homogeneous Surface ◽  
Resonance Principle ◽  
Coating Method

There are extensive studies on the development of composite solutions involving various types of materials. Therefore, this works aims to incorporate two polymers of nanocrystalline cellulose (NCC) and poly(3,4-ethylenethiophene) (PEDOT) to develop a composite thin film via the spin-coating method. Then, Fourier transform infrared (FTIR) spectroscopy is employed to confirm the functional groups of the NCC/PEDOT thin film. The atomic force microscopy (AFM) results revealed a relatively homogeneous surface with the roughness of the NCC/PEDOT thin film being slightly higher compared with individual thin films. Meanwhile, the ultraviolet/visible (UV/vis) spectrometer evaluated the optical properties of synthesized thin films, where the absorbance peaks can be observed around a wavelength of 220 to 700 nm. An optical band gap of 4.082 eV was obtained for the composite thin film, which is slightly lower as compared with a single material thin film. The NCC/PEDOT thin film was also incorporated into a plasmonic sensor based on the surface plasmon resonance principle to evaluate the potential for sensing mercury ions in an aqueous medium. Resultantly, the NCC/PEDOT thin film shows a positive response in detecting the various concentrations of mercury ions. In conclusion, this work has successfully developed a new sensing layer in fabricating an effective and potential heavy metal ions sensor.

Enhanced Curie temperature and magnetoelectric effect in BaTiO3-based piezoelectrics and NiFe2O4 composite thin films deposited via pulsed laser deposition

2019 ◽  
Vol 33 (11) ◽  
pp. 1950130 ◽  
Author(s):  
Qingping Dai ◽  
Kaixin Guo ◽  
Chaoyong Deng
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Curie Temperature ◽  
Pulsed Laser Deposition ◽  
Magnetoelectric Effect ◽  
Pulsed Laser ◽  
Composite Thin Film ◽  
Laser Deposition ◽  
Magnetoelectric Properties ◽  
Magnetoelectric Coefficient

Multiferroic [Formula: see text]/[Formula: see text]–[Formula: see text] bilayer thin film epitaxially grown on (001)-[Formula: see text]/[Formula: see text] substrate was prepared by pulsed laser deposition. Excellent ferroelectric, magnetoelectric properties and a higher Curie temperature were observed in the [Formula: see text]/[Formula: see text]–[Formula: see text] composite thin film compared with the [Formula: see text]/[Formula: see text] composite thin film. In particular, the remnant and saturated polarizations of [Formula: see text]/[Formula: see text]–[Formula: see text] are [Formula: see text] and [Formula: see text], respectively, and the maximum magnetoelectric coefficient can reach up to [Formula: see text], which are larger than those of the [Formula: see text]/[Formula: see text] composite thin film (18.8, [Formula: see text], and [Formula: see text]).

Sign in / Sign up

Export Citation Format

Share Document