Characterization of titania thin films grown by dip-coating technique

Abstract

A dip-coating technique was employed to prepare anatase phase of titania thin films. Fluorine doped tin oxide substrates were used to prepare titania thin films. The samples were annealed at 550°C for 18 h. X-ray diffraction results revealed the amorphous and anatase phases of TiO 2 for as-synthesized and annealed samples, respectively. The crystallite size of anatase TiO 2 thin films was almost 25 nm for annealed samples. UV-visible confirmed the energy band gap 3.86 and 3.64 eV for as-prepared and calcinated titania thin films. The reduction in the energy band gap could be due to the change in crystallization and agglomeration of small grains after calcination. The morphology of the prepared films was investigated by field emission scanning electron microscopy which demonstrated the agglomeration of spherical particles of TiO 2 with average particle size of about 30 nm. The molecular properties (chemical bonding) of the samples were investigated by means of Fourier Transform Infrared (FTIR) spectroscopy. FTIR analysis exhibited the formation of titania, functional group OH, hydroxyl stretching vibrations of the C-OH groups, bending vibration mode of H-O-H, alkyl C-H stretch, stretching band of Ti-OH, CN asymmetric band stretching, and C=O saturated aldehyde.

Improving the Corrosion Resistance of Ni/SS Thin Films by Nitrogen Ion Implantation

“…Table I depicts the variation of the crystallite size, D (coherently diffracting domains) calculated from the Ni 3 N(111) peak as a function of energy implantation [21]. It is well known that the size of the particles depends on implantation energy [25] and the crystallinity is improved upon heat treatments [27,30]. From data of Table I, it is observed that the crystallite size increases with the implantation energy.…”

“…The Scherrer formula is used to obtain the crystallite size, D (coherently diffracting domains) [23][24][25][26][27]:…”

Preparation and characterisation of a novel copper‐imprinted polymer based on β‐cyclodextrin copolymers for selective determination of Cu2+ions

“…Figure shows the FTIR spectra of β‐CD, β‐CD‐MAH, non‐imprinted polymer and Cu(II)‐imprinted polymer. The FTIR spectra show a peak due to an asymmetrical stretching vibration between 3400 and 3500 cm −1 , which can be attributed to the O–H stretching vibration in β‐CD . After the reaction of β‐CD with MAH, a characteristic peak due to the symmetric stretching vibration of unsaturated carboxylic acid ester appeared at 1728 cm −1 , while the ring vibration peak was still present at 580 cm −1 .…”

“…The FTIR spectra show a peak due to an asymmetrical stretching vibration between 3400 and 3500 cm −1 , which can be attributed to the O-H stretching vibration in -CD. 29,30 After the reaction of -CD with MAH, a characteristic peak due to the symmetric stretching vibration of unsaturated carboxylic acid ester appeared at 1728 cm −1 , while the ring vibration peak was still present at 580 cm −1 . The peak at 940 cm −1 due to vibration of the backbone containing the -1,4 glycosidic bond was in agreement with the structure of -CD.…”

Analyzing the fractal feature of nickel thin films surfaces modified by low energy nitrogen ion

“…Modification of materials surface helps to enhance their functional characteristics and spread technical applications [1][2][3][4][5][6]. Nowadays, there are a lot of processing methods for modification of surface and near-surface areas [7][8][9][10][11][12]. These methods provide etching, anodization, structuration, oxidation, nitridization, etc.…”