Microbial Attachment Inhibition through Low-Voltage Electrochemical Reactions on Electrically Conducting Membranes

2015 ◽  
Vol 49 (21) ◽  
pp. 12741-12750 ◽  
Author(s):  
Avner Ronen ◽  
Wenyan Duan ◽  
Ian Wheeldon ◽  
Sharon Walker ◽  
David Jassby
Keyword(s):  
Low Voltage ◽  
Electrochemical Reactions ◽  
Electrically Conducting ◽  
Conducting Membranes ◽  
Attachment Inhibition ◽  
Microbial Attachment

Paste-type thin-film transistors based on self-supported chitosan membranes

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 105084-105089 ◽  
Author(s):  
Guodong Wu ◽  
Hui Xiao
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Low Voltage ◽  
Gate Dielectrics ◽  
Flexible Substrates ◽  
Logic Function ◽  
Proton Conducting ◽  
Low Voltage Operation ◽  
Chitosan Membranes ◽  
Conducting Membranes

Self-supported chitosan-based proton-conducting membranes were used as both flexible substrates and gate dielectrics for paste-type TFTs with low-voltage operation and logic function.

scholarly journals Reactive electrically conducting membranes for phosphorus recovery from livestock wastewater effluents

2020 ◽  
pp. 111432
Author(s):  
Kartikeya M. Kekre ◽  
Arezou Anvari ◽  
Katelyn Kahn ◽  
Ying Yao ◽  
Avner Ronen
Keyword(s):  
Phosphorus Recovery ◽  
Livestock Wastewater ◽  
Electrically Conducting ◽  
Conducting Membranes ◽  
Wastewater Effluents

scholarly journals Surface Modification to Modulate Microbial Biofilms—Applications in Dental Medicine

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6994
Author(s):  
Alina-Maria Holban ◽  
Catalina Farcasiu ◽  
Oana-Cella Andrei ◽  
Alexandru Mihai Grumezescu ◽  
Alexandru-Titus Farcasiu
Keyword(s):  
Surface Modification ◽  
Biofilm Formation ◽  
Recent Progress ◽  
Materials Science ◽  
Advanced Materials ◽  
Pathogenic Microorganisms ◽  
Microbial Biofilms ◽  
Attachment Inhibition ◽  
Microbial Attachment ◽  
Made In

Recent progress in materials science and nanotechnology has led to the development of advanced materials with multifunctional properties. Dental medicine has benefited from the design of such materials and coatings in providing patients with tailored implants and improved materials for restorative and functional use. Such materials and coatings allow for better acceptance by the host body, promote successful implantation and determine a reduced inflammatory response after contact with the materials. Since numerous dental pathologies are influenced by the presence and activity of some pathogenic microorganisms, novel materials are needed to overcome this challenge as well. This paper aimed to reveal and discuss the most recent and innovative progress made in the field of materials surface modification in terms of microbial attachment inhibition and biofilm formation, with a direct impact on dental medicine.

Microscopy of Metal Oxide Surfaces

2000 ◽  
Vol 6 (4) ◽  
pp. 324-328
Author(s):  
Martin R. Castell ◽  
Sergei L. Dudarev ◽  
Christiane Muggelberg ◽  
Adrian P. Sutton ◽  
G. Andrew D. Briggs ◽  
...  
Keyword(s):  
Surface Structure ◽  
Room Temperature ◽  
Low Voltage ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Metal Oxide Surfaces ◽  
Electrically Conducting ◽  
Temperature Scanning ◽  
Electronic Surface ◽  
Voltage Scanning

Abstract Elevated temperature scanning tunneling microscopy is used to study oxides that are room temperature insulators but become sufficiently electrically conducting at higher temperatures to allow imaging to be performed. Atomic resolution images of NiO, CoO, and UO2 have been obtained in this fashion which allow surface structure and defect determination. To complement the experiments, modeling of the electronic surface structure reveals which atomic sites give rise to the contrast observed in the images. Low voltage scanning electron microscopy is used to image small equilibrium pores in UO2 single crystals to evaluate the surface energy ratio of the (111) to (001) surfaces.

Microscopy of Metal Oxide Surfaces

2000 ◽  
Vol 6 (4) ◽  
pp. 324-328 ◽  
Author(s):  
Martin R. Castell ◽  
Sergei L. Dudarev ◽  
Christiane Muggelberg ◽  
Adrian P. Sutton ◽  
G. Andrew D. Briggs ◽  
...  
Keyword(s):  
Surface Structure ◽  
Room Temperature ◽  
Low Voltage ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Metal Oxide Surfaces ◽  
Electrically Conducting ◽  
Temperature Scanning ◽  
Electronic Surface ◽  
Voltage Scanning

AbstractElevated temperature scanning tunneling microscopy is used to study oxides that are room temperature insulators but become sufficiently electrically conducting at higher temperatures to allow imaging to be performed. Atomic resolution images of NiO, CoO, and UO2 have been obtained in this fashion which allow surface structure and defect determination. To complement the experiments, modeling of the electronic surface structure reveals which atomic sites give rise to the contrast observed in the images. Low voltage scanning electron microscopy is used to image small equilibrium pores in UO2 single crystals to evaluate the surface energy ratio of the (111) to (001) surfaces.

Processing of human melanoma cells for correlative TEM, LVSEM, and LM

1991 ◽  
Vol 49 ◽  
pp. 106-107
Author(s):  
Marek Malecki ◽  
J. Victor Small ◽  
James Pawley
Keyword(s):  
Electron Microscopy ◽  
Low Voltage ◽  
Fluorescent Microscopy ◽  
Blood Stream ◽  
Surface Topology ◽  
Integrin Receptors ◽  
Transmission Electron ◽  
Develop Technology ◽  
Voltage Scanning ◽  
Mechanisms Of Adhesion

The relative roles of adhesion and locomotion in malignancy have yet to be clearly established. In a tumor, subpopulations of cells may be recognized according to their capacity to invade neighbouring tissue,or to enter the blood stream and metastasize. The mechanisms of adhesion and locomotion are themselves tightly linked to the cytoskeletal apparatus and cell surface topology, including expression of integrin receptors. In our studies on melanomas with Fluorescent Microscopy (FM) and Cell Sorter(FACS), we noticed that cells in cultures derived from metastases had more numerous actin bundles, then cells from primary foci. Following this track, we attempted to develop technology allowing to compare ultrastructure of these cells using correlative Transmission Electron Microscopy(TEM) and Low Voltage Scanning Electron Microscopy(LVSEM).

High-pressure freezing of cells in suspension for low-voltage scanning electron microscopy (LVSEM)

1991 ◽  
Vol 49 ◽  
pp. 64-65
Author(s):  
Marek Malecki ◽  
James Pawley ◽  
Hans Ris
Keyword(s):  
Electron Microscopy ◽  
High Pressure ◽  
Low Voltage ◽  
Culture Media ◽  
Cell Structure ◽  
Freeze Substitution ◽  
Ice Crystal ◽  
High Pressure Freezing ◽  
Cell Culture Media ◽  
Voltage Scanning

The ultrastructure of cells suspended in physiological fluids or cell culture media can only be studied if the living processes are stopped while the cells remain in suspension. Attachment of living cells to carrier surfaces to facilitate further processing for electron microscopy produces a rapid reorganization of cell structure eradicating most traces of the structures present when the cells were in suspension. The structure of cells in suspension can be immobilized by either chemical fixation or, much faster, by rapid freezing (cryo-immobilization). The fixation speed is particularly important in studies of cell surface reorganization over time. High pressure freezing provides conditions where specimens up to 500μm thick can be frozen in milliseconds without ice crystal damage. This volume is sufficient for cells to remain in suspension until frozen. However, special procedures are needed to assure that the unattached cells are not lost during subsequent processing for LVSEM or HVEM using freeze-substitution or freeze drying. We recently developed such a procedure.

Electrochemical nucleation and growth of copper on iron and aluminum: A TEM study of industrial copper cementation

1978 ◽  
Vol 36 (1) ◽  
pp. 454-455
Author(s):  
L.E. Murr ◽  
V. Annamalai
Keyword(s):  
Metal Surface ◽  
Copper Deposit ◽  
Nucleation And Growth ◽  
16Th Century ◽  
Electrochemical Reactions ◽  
Mine Shaft ◽  
De Re ◽  
Copper Precipitation ◽  
Electrochemical Nucleation ◽  
Interesting System

Georgius Agricola in 1556 in his classical book, “De Re Metallica”, mentioned a strange water drawn from a mine shaft near Schmölnitz in Hungary that eroded iron and turned it into copper. This precipitation (or cementation) of copper on iron was employed as a commercial technique for producing copper at the Rio Tinto Mines in Spain in the 16th Century, and it continues today to account for as much as 15 percent of the copper produced by several U.S. copper companies.In addition to the Cu/Fe system, many other similar heterogeneous, electrochemical reactions can occur where ions from solution are reduced to metal on a more electropositive metal surface. In the case of copper precipitation from solution, aluminum is also an interesting system because of economic, environmental (ecological) and energy considerations. In studies of copper cementation on aluminum as an alternative to the historical Cu/Fe system, it was noticed that the two systems (Cu/Fe and Cu/Al) were kinetically very different, and that this difference was due in large part to differences in the structure of the residual, cement-copper deposit.

Development of a conical anode Fe-gun for low voltage SEM

1988 ◽  
Vol 46 ◽  
pp. 978-979
Author(s):  
T. Miyokawa ◽  
S. Norioka ◽  
S. Goto
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Low Voltage ◽  
Irradiation Damage ◽  
Cold Cathode ◽  
Virtual Source ◽  
Source Position ◽  
Electrostatic Lens ◽  
Electrostatic Lenses ◽  
Wide Range

Field emission SEMs (FE-SEMs) are becoming popular due to their high resolution needs. In the field of semiconductor product, it is demanded to use the low accelerating voltage FE-SEM to avoid the electron irradiation damage and the electron charging up on samples. However the accelerating voltage of usual SEM with FE-gun is limited until 1 kV, which is not enough small for the present demands, because the virtual source goes far from the tip in lower accelerating voltages. This virtual source position depends on the shape of the electrostatic lens. So, we investigated several types of electrostatic lenses to be applicable to the lower accelerating voltage. In the result, it is found a field emission gun with a conical anode is effectively applied for a wide range of low accelerating voltages.A field emission gun usually consists of a field emission tip (cold cathode) and the Butler type electrostatic lens.

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