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Effect of Annealing on Structural, Morphological, Electrical and Optical Studies of Nickel Oxide Thin Films

Journal of Surface Engineered Materials and Advanced Technology 2011年第2期1卷 35-41页

作者： Vikas Patil Patil shailesh pawar Manik Chougule Prasad Godse Ratnakar Sakhare Shashwati Sen Pradeep Joshi Materials Research Laboratory School of Physical Sciences Solapur University Solapur-413255 M.S. India

Sol gel spin coating method has been successfully employed for the deposition of nanocrystalline nickel oxide (NiO) thin films. The films were annealed at 400°C - 700°C for 1 h in an air and changes in the structural, morphological, electrical and optical properties were studied. The structural properties of nickel oxide films were studied by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD analysis shows that all the films are crystallized in the cubic phase and present a random orientation. Surface morphology of the nickel oxide film consists of nanocrystalline grains with uniform coverage of the substrate surface with randomly oriented morphology. The electrical conductivity showed the semiconducting nature with room temperature electrical conductivity increased from 10-4 to 10-2(Ωcm)-1 after annealing. The decrease in the band gap energy from 3.86 to 3.47 eV was observed after annealing NiO films from 400oC - 700oC. These mean that the optical quality of NiO films is improved by annealing.

关键词： Nickel Oxide Sol Gel Method Structural Properties Optoelectronic Properties

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Nanocrystalline CuO Thin Films for H<sub>2</sub>S Monitoring: Microstructural and Optoelectronic Characterization

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Journal of Sensor Technology 2011年第2期1卷 36-46页

作者： Vikas Patil Datta Jundale shailesh pawar Manik Chougule Prsad Godse Sanjay Patil Bharat Raut Shashwati Sen 不详

Nanocrystalline copper oxide (CuO) thin films were deposited onto glass substrates by a spin coating technique using an aqueous solution of copper acetate. These films were characterized for their structural, mor-phological, optoelectronic properties by means of X-ray diffraction (XRD) scanning electron microscopy (SEM), UVspectroscopy and four probe method. The CuO films are oriented along (1 1 1) plane with the monoclinic crystal structure. These films were utilized in H2S sensors. The dependence of the H2S response on the operating temperature, H2S concentration of CuO film (annealed at 700。C) was investigated. The CuO film showed selectivity for H2S. The maximum H2S response of 25.2 % for the CuO film at gas concentra-tion of 100 ppm at operating temperature 200oC was achieved.

关键词： CuO Thin Films Structural Properties Optoelectronic Properties H2S Sensor

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Fabrication of Nanocrystalline TiO<sub>2</sub>Thin Film Ammonia Vapor Sensor

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Journal of Sensor Technology 2011年第1期1卷 9-16页

作者： shailesh pawar Manik Chougule Sanjay Patil Bharat Raut Dhanaji Dalvi Pramod Patil Shashwati Sen Pradeep Joshi Vikas Patil 不详

Nanocrystalline titanium oxide thin films have been deposited by spin coating technique and then have been analyzed to test their application in NH3 gas-sensing technology. In particular, spectrophotometric and con-ductivity measurements have been performed in order to determine the optical and electrical properties of titanium oxide thin films. The structure and the morphology of such material have been investigated by X ray diffraction, Scanning microscopy, high resolution electron microscopy and selected area electron diffrac-tion. The X-ray diffraction measurements confirmed that the films grown by this technique have good crys-talline tetragonal mixed anatase and rutile phase structure The HRTEM image of TiO2 thin film showed grains of about 50-60 nm in size with aggregation of 10-15 nm crystallites. Selected area electron diffraction pattern shows that the TiO2 films exhibited tetragonal structure. The surface morphology (SEM) of the TiO2 film showed that the nanoparticles are fine The optical band gap of TiO2 film is 3.26 eV. Gas sensing proper-ties showed that TiO2 films were sensitive as well as fast in responding to NH3. A high sensitivity for ammo-nia indicates that the TiO2 films are selective for this gas.

关键词： Sol Gel Method Structural Properties Optical Properties NH3 Sensor

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Quality of life and oral potentially malignant disorders: Critical appraisal and prospects

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World Journal of Clinical Oncology 2018年第4期9卷 56-59页

作者： shailesh M Gondivkar Rahul R Bhowate Amol R Gadbail Sachin C Sarode Shankargouda Patil Department of Oral Medicine and Radiology Government Dental College and Hospital Department of Oral Medicine and Radiology Sharad Pawar Dental College and Hospital Department of Dentistry Indira Gandhi Government Medical College and Hospital Department of Oral Pathology and Microbiology Dr. D.Y. Patil Dental College and Hospital Department of Maxillofacial Surgery and Diagnostic Sciences Division of Oral Pathology College of Dentistry Jazan University

Quality of life(QoL) is a vital and often required health outcome measure that is relevant to patient care. A healthy oral cavity enables person to perform daily activities without any limitations. However, any disturbance may result in impaired QoL. The oral health-remains an essential element of people's health and well-being. In recent years, the tradition of clinical practice and research has been changed by incorporating QoL assessment, as it helps in assessment of patients' needs and monitoring treatment responses. Oral potentially malignant disorders(OPMDs) are a group of chronic disorders including oral leukoplakia(OL), oral lichen planus and oral submucous fibrosis(OSF). It is evident that patients with OPMDs experience significant health-related symptoms, functional limitations and psycho-social impairment, compromising their Qo L. Moreover, the worsening of Qo L has been associated with advanced stages of OPMDs. Despite of increasing number of OPMD cases in recent decades, limited literature is available regarding QoL in this population. Although, there is higher prevalence of habit-related OPMDs, particularly OSF and OL in Southern Asian countries, only a few studies have been performed in these populations. Moreover, these studies administered generic Qo L instruments, which offer less sensitivity to clinical changes. However, condition-specific instruments are more sensitive and allows better measurement of QoL. As the impacts of different conditions on OHRQoL may vary, the development and validation of a QoL instrument specific to each clinical entity of OPMDs is currently needed.

关键词： Quality of life Oral potentially malignant disorders Oral submucous fibrosis Oral lichen planus Oral leukoplakia

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