Scanning electrochemical microscopy. 11. Improvement of image resolution by digital processing techniques

1991 ◽  
Vol 63 (21) ◽  
pp. 2442-2447 ◽  
Author(s):  
Chongmok. Lee ◽  
David O. Wipf ◽  
Allen J. Bard ◽  
Keith. Bartels ◽  
Alan C. Bovik
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Digital Processing ◽  
Image Resolution ◽  
Processing Techniques ◽  
Electrochemical Microscopy

Enhancing image quality of scanning electrochemical microscopy by improved probe fabrication and displacement

2005 ◽  
Vol 83 (10) ◽  
pp. 1779-1791 ◽  
Author(s):  
Renkang Zhu ◽  
Zhifeng Ding
Keyword(s):  
Image Quality ◽  
Closed Loop ◽  
Scanning Electrochemical Microscopy ◽  
Image Resolution ◽  
Three Dimensions ◽  
Scanning System ◽  
Cyclic Voltammograms ◽  
Electrode Arrays ◽  
Electrochemical Microscopy

Scanning electrochemical microscopy (SECM) is a powerful tool for its wide applications in determining charge transfer kinetics, imaging chemical reactions and topography, as well as fabricating microstructures at various interfaces and (or) surfaces. Imaging applications, in particular, rely on the natures of SECM probes and the scanning systems to move them in the vicinity of interfaces. While progress has been made in new approaches to tip fabrication, there are few reports on the improvement of the tip positioning system to enhance SECM image quality. We have recently built an advanced SECM setup using a closed-loop scanning system and improved probe fabrication and characterization procedures. Here we will describe this development, as well as the application of these techniques to greatly improve the quality of SECM images. Video micrograph, cyclic voltammograms, and SECM approach curves (current vs. tip–substrate distance) were chosen to characterize probe quality and to determine the ratio of electrode diameter to glass sheath diameter. The SECM setup has a resolution and repeatability of 20 nm in three dimensions (x, y, and z) and can locate and relocate areas of interest precisely after a coarse image. Interdigitated electrode arrays of platinum and gold were first imaged. Image resolution revealed by sharpness of Pt band edges was enhanced by using a 2 µm diameter electrode. Pt or Au band height was found to be around 80–200 nm by fitting the approach curves to the theoretical ones. Imaging conditions such as delay time for a large step size between two succeeding data points were optimized. To test its thermal and temporal stability, the system was then used to image letters, which were printed on a transparency with font bold Courier New and font size 2. Minor drifts were found during the image process up to the experimental length of 8 h and 45 min. Letter thickness was found to be 1.0–1.2 µm. A silicon substrate with an array of square pits spaced apart on 10 µm centers was finally imaged. Good quality images were obtained at various tip–substrate distances even though the squares were just as small, if not smaller, than the tip. The samples were also imaged by AFM for comparison.Key words: scanning electrochemical microscopy, atomic force microscopy, microelectrode fabrication, closed-loop imaging, probe approach curve.

scholarly journals An Research to Enhance the Old Manuscript Resolution using Deep Learning Mechanism

2019 ◽  
Vol 8 (6S4) ◽  
pp. 1597-1599 ◽  
Keyword(s):  
Neural Network ◽  
Deep Learning ◽  
Crucial Role ◽  
Digital Processing ◽  
Image Resolution ◽  
Learning Mechanism ◽  
Image Enhancing ◽  
Processing Techniques ◽  
Over Time

In this paper we address the problem of enhancing the resolution of old manuscripts as these will deteriorate over time. The manuscripts are of at most importance as they may contain sensitive and important imformation.Hence digital processing techniques play a crucial role to improve the quality of the manuscripts. We propose a standard deep learning mechanism that is conventional neural network (CNN) to enhance image resolution which will help to increase resolution of old manuscript .It not only increases the resolution but also tries to identify missing content using digit recognizer. We also compare the efficiency of our approach with the existing image enhancing techniques.

Implications of Digital Image Processing in the Paraclinical Assessment of the Partially Edentated Patient

2018 ◽  
Vol 69 (2) ◽  
pp. 521-524
Author(s):  
Magda Ecaterina Antohe ◽  
Doriana Agop Forna ◽  
Cristina Gena Dascalu ◽  
Norina Consuela Forna
Keyword(s):  
Image Processing ◽  
Image Enhancement ◽  
Treatment Plan ◽  
Digital Processing ◽  
Contour Detection ◽  
Anatomical Structures ◽  
Imaging Processing ◽  
Point To Point ◽  
Radiological Image ◽  
Processing Techniques

The application of certain digital processing techniques offers the possibility of extra accuracy in the interpretation of paraclinical examinations of this type, with profound implications in the diagnosis as well as in the hierarchy of the treatment plan. The purpose of this study is to identify the type of imaging processing for the identification of pathological elements from orthopantomographies and articular tomographies. A number of 20 orthopantomographies and 15 temporo-mandibular joint tomography have undergone through various image enhancement techniques. Various methods of image enhancement (enhancement) have been used for those procedures whereby it becomes more useful in the following aspects: specific details are highlighted; noise is eliminated; the image becomes more visually attractive. The workings were done in Corel PhotoPaint 7.0, using the automatic procedures available.The choice of a particular type of image enhancement technique has been selected for each type of pathology found in orthopantomographies or articular tomography, providing the best accuracy for an optimal imaging interpretation that underpins a precision diagnosis.Of the most useful imaging processing in the optimization of the orthopantomographic image accuracy the point-to-point transformations are to be noted. The image processing proposed in this article focused primarily on improving the radiological image attributes to highlight specific anatomical structures, and secondly, the contour detection, where it was necessary for the diagnostic purposes as well.

scholarly journals Use of Amperometric and Potentiometric Probes in Scanning Electrochemical Microscopy for the Spatially-Resolved Monitoring of Severe Localized Corrosion Sites on Aluminum Alloy 2098-T351

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1132 ◽  
Author(s):  
Rejane M. P. da Silva ◽  
Javier Izquierdo ◽  
Mariana X. Milagre ◽  
Abenchara M. Betancor-Abreu ◽  
Isolda Costa ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Oxygen Depletion ◽  
Localized Corrosion ◽  
Alloy Surface ◽  
Al Alloy ◽  
Spatially Resolved ◽  
Lower Oxygen ◽  
Local Ph ◽  
Electrochemical Microscopy

Amperometric and potentiometric probes were employed for the detection and characterization of reactive sites on the 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemical microscopy (SECM). Firstly, the probe of concept was performed on a model Mg-Al galvanic pair system using SECM in the amperometric and potentiometric operation modes, in order to address the responsiveness of the probes for the characterization of this galvanic pair system. Next, these sensing probes were employed to characterize the 2098-T351 alloy surface immersed in a saline aqueous solution at ambient temperature. The distribution of reactive sites and the local pH changes associated with severe localized corrosion (SLC) on the alloy surface were imaged and subsequently studied. Higher hydrogen evolution, lower oxygen depletion and acidification occurred at the SLC sites developed on the 2098-T351 Al-alloy.

Local electrochemical activity of transition metal dichalcogenides and their heterojunctions on 3D-printed nanocarbon surfaces

Nanoscale ◽  
2021 ◽  
Author(s):  
Katarina A. Novčić ◽  
Christian Iffelsberger ◽  
Siowwoon Ng ◽  
Martin Pumera
Keyword(s):  
Transition Metal ◽  
Electrochemical Performance ◽  
Transition Metal Dichalcogenides ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Activity ◽  
Thermally Activated ◽  
Metal Dichalcogenides ◽  
3D Printed ◽  
Electrochemical Microscopy

MoS2 and WS2 and their heterojunctions are used to modify thermally activated 3D-printed nanocarbon structures. Herein, the local electrochemical performance for HER of the modified structures is demonstrated by scanning electrochemical microscopy.

scholarly journals Simultaneous Intelligent Imaging of Nanoscale Reactivity and Topography by Scanning Electrochemical Microscopy

2021 ◽  
Author(s):  
Dylan T. Jantz ◽  
Ryan J. Balla ◽  
Siao-Han Huang ◽  
Niraja Kurapati ◽  
Shigeru Amemiya ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Electrochemical Microscopy

scholarly journals Biological Scanning Electrochemical Microscopy and Its Application to Live Cell Studies

2011 ◽  
Vol 83 (5) ◽  
pp. 1485-1492 ◽  
Author(s):  
Isabelle Beaulieu ◽  
Sabine Kuss ◽  
Janine Mauzeroll ◽  
Matthias Geissler
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Live Cell ◽  
Electrochemical Microscopy
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