scholarly journals Electrodeposited copper on indium tin oxide. Reaction and nucleation mechanisms

2018 ◽  
Vol 1 (1) ◽  
pp. 565-571
Author(s):  
Zouaoui Ahmed
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Active Sites ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Diffusion Controlled ◽  
Instantaneous Nucleation ◽  
Nucleation Mechanisms ◽  
Current Transients

In this paper, we report on an analysis carried out by using cyclic voltammetric (CV) and chronoamperometric (CA) techniques on the reaction and nucleation mechanisms of electrodeposited copper on indium-doped tin oxide (ITO)-coated glass substrates from sulfate solutions. The present investigation has been performed in an acid solution at pH 5. The Scharifker and Hills model were used to analyze current transients. At relatively low overpotentials, the copper deposition can be described by a model involving instantaneous nucleation on active sites and diffusion-controlled 3D growth. The values of diffusion coefficient D for Cu2+ ions are estimated. Atomic force microscopy (AFM) has been used to check on the samples’ surface morphology.

scholarly journals Microwave Spectroscopic Detection of Human Hsp70 Protein on Annealed Gold Nanostructures on ITO Glass Strips

Biosensors ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 118
Author(s):  
Rodica Ionescu ◽  
Raphael Selon ◽  
Nicolas Pocholle ◽  
Lan Zhou ◽  
Anna Rumyantseva ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Stress Disorders ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Conductive Glass ◽  
Hsp70 Protein ◽  
Atomic Force ◽  
Ito Glass ◽  
First Time ◽  
Human Heat Shock Protein

Conductive indium-tin oxide (ITO) and non-conductive glass substrates were successfully modified with embedded gold nanoparticles (AuNPs) formed by controlled thermal annealing at 550 °C for 8 h in a preselected oven. The authors characterized the formation of AuNPs using two microscopic techniques: scanning electron microscopy (SEM) and atomic force microscopy (AFM). The analytical performances of the nanostructured-glasses were compared regarding biosensing of Hsp70, an ATP-driven molecular chaperone. In this work, the human heat-shock protein (Hsp70), was chosen as a model biomarker of body stress disorders for microwave spectroscopic investigations. It was found that microwave screening at 4 GHz allowed for the first time the detection of 12 ng/µL/cm2 of Hsp70.

Transparent Conducting Indium-Tin-Oxide Thin Film with Extremely Flatted Surface

2001 ◽  
Vol 666 ◽  
Author(s):  
Hiromichi Ohta ◽  
Masahiro Orita ◽  
Masahiro Hirano ◽  
Hideo Hosono
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Film Growth ◽  
Oxide Thin Film ◽  
Force Microscopy ◽  
Atomic Force ◽  
Out Of Plane ◽  
Key Factor ◽  
Surface Microstructures

ABSTRACTIndium-tin-oxide films were grown hetero-epitaxially on YSZ surface at a substrate temperature of 900 °C, and their surface microstructures were observed by using atomic force microscopy. ITO films grown on (111) surface of YSZ exhibited very high crystal quality; full width at half maximum of out-of-plane rocking curve was 54 second. The ITO was grown spirally, with flat terraces and steps corresponding to (222) plane spacing of 0.29 nm. Oxygen pressure during film growth is another key factor to obtain atomically flat surfaced ITO thin film.

scholarly journals Investigating the Nanocomposite Thin Films of Hematite α-Fe2O3 and Nafion for Cholesterol Biosensing Applications

2020 ◽  
Vol 2 ◽  
Author(s):  
Indra Sulania ◽  
R. Blessy Pricilla ◽  
G. B. V. S. Lakshmi
Keyword(s):  
Thin Films ◽  
Indium Tin Oxide ◽  
Differential Pulse ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Enzyme Substrate ◽  
Atomic Force ◽  
Nanocomposite Thin Films ◽  
Multi Phase ◽  
Cholesterol Biosensor

Nanocomposite materials are multi-phase materials, usually solids, which have two or more component materials having different chemical and physical properties. When blended together, a newer material is formed with distinctive properties which make them an eligible candidate for many important applications. In the present study, thin films of nafion (polymer) and hematite or α-Fe2O3 (nanoparticles) nanocomposite is fabricated on indium tin oxide (ITO) coated glass substrates, due to its enhanced ionic conductivity, for cholesterol biosensor applications. Scanning electron microscopy and Atomic force microscopy revealed the formation of nanorod structured α-Fe2O3 in the films. The cyclic voltammetry (CV) studies of nafion-α-Fe2O3/ITO revealed the redox properties of the nanocomposites. The sensing studies were performed on nafion-α-Fe2O3/CHOx/ITO bioelectrode using differential pulse voltammetry (DPV) at various concentrations of cholesterol. The enzyme immobilization leaded to the selective detection of cholesterol with a sensitivity of 64.93 × 10−2 μA (mg/dl)−1 cm−2. The enzyme substrate interaction (Michaelis–Menten) constant Km, was obtained to be 19 mg/dl.

scholarly journals Chemosensing on Miniaturized Plasmonic Substrates

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 275
Author(s):  
Pengcheng Wang ◽  
Rodica Elena Ionescu
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Localized Surface Plasmon Resonance ◽  
Thin Layers ◽  
Localized Surface Plasmon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Model Molecule ◽  
First Time ◽  
Scanning Electron

Round, small-sized coverslips were coated for the first time with thin layers of indium tin oxide (ITO, 10–40 nm)/gold (Au, 2–8 nm) and annealed at 550 °C for several hours. The resulting nanostructures on miniaturized substrates were further optimized for the localized surface plasmon resonance (LSPR) chemosensing of a model molecule—1,2-bis-(4-ppyridyl)-ethene (BPE)—with a detection limit of 10−12 M BPE in an aqueous solution. All the fabrication steps of plasmonic-annealed platforms were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM).

Preparation and Properties of Dy Doped La and Sc Solution of BiFeO3 Film

2013 ◽  
Vol 537 ◽  
pp. 109-113
Author(s):  
Xi Wei Qi ◽  
Xiao Yan Zhang ◽  
Xuan Wang ◽  
Hai Bin Sun ◽  
Jian Quan Qi
Keyword(s):  
Thin Film ◽  
Indium Tin Oxide ◽  
Doping Level ◽  
Sol Gel ◽  
Second Phase ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Ito Glass ◽  
Dy Doping

A series of Dy doped La and Sc solution of BiFeO3 thin films have been prepared by using spin-coating process on conductive indium tin oxide (ITO)/glass substrates, which a simple sol-gel possess is applied and annealed at 500°C. With the increase of content of Dy, the strongest peak (110) of La and Sc solution BiFeO3 film tends to further broaden. There is no second phase existence within the present Dy doping level. Cross section scanning electron microscope (SEM) pictures revealed that the thickness of BiFeO3 film was about 370 nm. For Dy doping level is 0.05, the maximum double remanent polarization 2Pr of as-prepared BiFeO3 thin film is15.44 μC/cm2. Image of atomic force microscopy indicated that the root-mean-square surface roughness value of as-prepared BiFeO3 thin film is 2.11 nm. The dielectric constant of as-prepared films tends to firstly increase and then decrease with the increase of Dy content

Correlation between morphology and NGM of 3,4- ethylenedioxythiophene (EDOT) in acetonitrile

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
María Angélica del Valle ◽  
María Belén Camarada ◽  
Fernando Díaz ◽  
Gastón East
Keyword(s):  
Working Conditions ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Current Time ◽  
Force Microscopy ◽  
Oxide Electrodes ◽  
Atomic Force ◽  
Diffusion Controlled ◽  
Instantaneous Nucleation ◽  
N Doping

AbstractThe nucleation and growth mechanism (NGM) for the electro-oxidation of 3,4-ethylenedioxythiophene (EDOT) in acetonitrile on platinum and tin(IV) oxide electrodes was determined by analyzing the potentiostatic current-time transients inferred from electrocrystallization theory. The measurements were complemented by using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Preliminary studies performed to establish the working conditions for the potentiostatic technique using cyclic voltammetry (CV) demonstrated that under the working conditions employed herein the best potential scan-rate to obtain electrodeposits of poly(EDOT) was 50 mV·s-1. The prepared polymer displayed electrochromic properties and p- and n-doping, the p-doping being chemically reversible. In addition, it was observed that the electropolymerization mechanisms on both electrode materials were a combination of two contributions: progressive nucleation, followed by diffusion-controlled tridimensional growth, PN3Ddif; and instantaneous nucleation followed by three-dimensional growth under charge transfer control, IN3Dct. At shorter times, the IN3Dct contribution prevail giving rise to conical deposits, while at longer electrolysis times the polymeric deposit is made of granules, corresponding to the PN3Ddif mechanism. The electrode material has no effect at all on the global mechanism, but affects the time at which either contribution predominates. However, the morphological predictions made from the NGMs must be corroborated by other techniques before using the data to control the deposit to be prepared.

scholarly journals The Effect of Deposition Rate on the Electrical Properties of Indium Tin Oxide (ITO) Thin Films

2015 ◽  
Vol 16 (2) ◽  
pp. 286
Author(s):  
Hadaate Ullah ◽  
Shahin Mahmud ◽  
Fahmida Sharmin Jui
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Deposition Rate ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Vital Role ◽  
Light Emitting ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Ito Thin Films

<p>Indium-tin oxide (ITO) which is optically transparent is referred as a “universal” electrode for various optoelectronic devices such as organic light emitting diodes (OLEDs). It is scientifically proved that the performance of OLEDs raises up significantly by exposing the ITO surface to oxygen plasma. This study employs conducting atomic force microscopy (C-AFM) for unique nanometer-scale mapping of the local current density of a vapor-deposited ITO film. Indium Tin Oxide (ITO) thin films have been prepared by using the reactive evaporation method on glass substrates in an oxygen atmosphere. It is found that the deposition rate plays a vital role in controlling the electrical properties of the ITO thin films. The resistivity and the electrical conductivity were also investigated. The electrical resistivity of 3.10 x10 <sup>–6</sup> Ωm has been obtained with a deposition rate of 2 nm/min.</p>

Fabrication and Characterization of RF Magnetron Sputtered Silicon Oxide Films

2014 ◽  
Vol 970 ◽  
pp. 102-105
Author(s):  
Jian Wei Hoon ◽  
Kah Yoong Chan ◽  
Cheng Yang Low
Keyword(s):  
Indium Tin Oxide ◽  
Silicon Oxide ◽  
Rf Magnetron Sputtering ◽  
Surface Topology ◽  
Sputtering Deposition ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Fabrication And Characterization

In this work, silicon dioxide (SiO2) films were fabricated on indium tin oxide (ITO) coated glass substrates by radio frequency (RF) magnetron sputtering deposition technique. The deposition rate of the magnetron sputtered SiO2 films was investigated. The SiO2 films were characterized with the atomic force microscopy (AFM) for their surface topology. In addition, the electrical insulating strength of the magnetron sputtered SiO2 was examined.

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