Transparent conductive Sn-doped indium oxide thin films deposited by spray pyrolysis technique

Properties of an Indium Tin Oxide Electrode Modified by a Laser Nanostructured Thin Au Film for Biosensing

“…This is confirmed by the highest peak current density registered in response to the presence of K 3 Fe(CN) 6 and also glucose, and the linear dependence observed for current density vs. the square root of the potential scan rate. It can be concluded that this ITO electrode modified by the NP array produced from the 20-nm thick Au film is a promising candidate for the production of a non-enzymatic glucose sensor.…”

“…The size-dependent correction of damping γ is given by [40] Equation (6) in which v F is the Fermi velocity (1.4 ϫ 10 6 m/s for Au), l 0 = the electron mean free path, and A = the proportionality constant of the order of unity, which represents the scattering processes. (6) In this work the value of A = 0.33 is assumed, however, the selection of A is not free from controversy and values between 0.1 and 2 have been justified by other authors too. [41,42] The electron mean free path is determined from the collision time 1/γ bulk and its value for gold obtained from electrical measurements at room temperature is 42 nm.…”

“…For evaluation of the reversibility of electrochemical reactions at the modified ITO electrodes the CV data were collected using ferricyanide as a model substance following literature indications. [28,47] The curves recorded for Au-modified electrodes immersed in a K 3 Fe(CN) 6 solution exhibit well-defined oxidation and reduction peaks assigned to the Fe 2+ / Fe 3+ redox couple (see Figure 4). In the case of the ITO reference sample, the voltammogram shows a quasi-reversible shape with a peak separation of ΔE = 0.166 V while for all Au-modified ones the current is higher and oxidation and reduction peak separation lower, which indicates an improved reversibility of the Fe 2+ /Fe 3+ redox.…”

“…The ITO substrate is known for its high electrical conductivity, low capacitive current, electrochemical activity over a wide potential range, and stable physical and electrochemical properties. [4] However, these properties depend on the fabrication method applied, such as e-beam evaporation (EBE), [5] the spray pyrolysis, [6] chemical vapor deposition (CVD), [7] sol-gel, [8] laser ablation, [9] and DC [10] and RF sputtering. [11,12] Also the fabrication conditions influence the ITO properties, e.g.…”

Synthesis of In2O3 Thin Films from Indium Thin Film by Hot-Water Oxidation Method

“…[4] The functional properties of these oxides are, to a large extent, controlled by the presence of native point defects and impurities. Several deposition techniques have been used for the deposition of In 2 O 3 films including chemical vapor deposition, [5] radio-frequency (RF) and direct current sputtering, [6] sol-gel, [7] spray pyrolysis, [8] etc.…”