Use of Electrostatic Charge Monitoring for Early Detection of Adhesive Wear in Oil Lubricated Contacts

Electrostatic charge sensing technology has been used to monitor adhesive wear in oil lubricated contacts. Previous work in this area demonstrated that “precursor” charge events may be detected prior to the onset of scuffing. Possible charging mechanisms associated with the precursor events were identified as tribocharging, surface charge variation, exo-emissions and debris generation. This paper discusses the proposed charging mechanisms and details a series of investigative tests using an adapted pin-on-disc (PoD) rig. The PoD tests focused on surface charge variation effects and were of two types, non-contact, where different materials were inserted in the disc, and controlled scuffing tests.

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Paper-based Triboelectric Nanogenerator and Activities of Salt Ions

Engineering Research Express ◽

10.1088/2631-8695/ac45df ◽

2021 ◽

Author(s):

Shatrudhan Palsaniya ◽

Komal Nehra ◽

Ashok Kumar Dasmahapatra

Keyword(s):

Steady State ◽

Kinetic Energy ◽

Charge Transport ◽

Surface Charge ◽

Aluminum Foil ◽

Electrostatic Charge ◽

Charge Carriers ◽

Triboelectric Nanogenerator ◽

Steady State Condition ◽

Salt Ions

Abstract This work presents a triboelectric nanogenerator (TENG) fabrication using polytetrafluoroethylene, aluminum foil, and cellulose paper. Mechanical interactions lead to atomic defects that stimuli the delocalized electrostatic charge carriers and kinetic energy. The addition of ionic salt’s microdroplets improved the TENG’s performance. Eventually, surface charge activities have escalated the electrical signals. Further, studied spontaneously increased charge transport performance at the steady-state condition in the presence of NaCl ionic droplets. We considered that these ionic activities actively participated in detecting salt ions.

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Early detection of arthropod-induced stress in strawberry using innovative remote sensing technology

Frontiers in Veterinary Science ◽

10.3389/conf.fvets.2019.05.00104 ◽

2019 ◽

Vol 6 ◽

Author(s):

Elvira De Lange ◽

Christian Nansen

Keyword(s):

Remote Sensing ◽

Early Detection ◽

Remote Sensing Technology ◽

Induced Stress ◽

Sensing Technology

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The role of surface charge in the interaction of nanoparticles with model pulmonary surfactants

Soft Matter ◽

10.1039/c8sm00925b ◽

2018 ◽

Vol 14 (28) ◽

pp. 5764-5774 ◽

Cited By ~ 11

Author(s):

F. Mousseau ◽

J.-F. Berret

Keyword(s):

Surface Charge ◽

Lipid Bilayers ◽

Pulmonary Surfactant ◽

Lipid Vesicles ◽

Electrostatic Charge ◽

Supported Lipid Bilayers ◽

Pulmonary Surfactants ◽

Inhaled Nanoparticles

Inhaled nanoparticles reaching the respiratory zone in the lungs enter first in contact with the pulmonary surfactant. It is shown here that nanoparticles and lipid vesicles formulated from different surfactant mimetics interact predominantlyviaelectrostatic charge mediated attraction and do not form supported lipid bilayers spontaneously.

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Effects of Hydrophobic and Electrostatic Cell Surface Properties of Bacteria on Feeding Rates of Heterotrophic Nanoflagellates

Applied and Environmental Microbiology ◽

10.1128/aem.67.2.814-820.2001 ◽

2001 ◽

Vol 67 (2) ◽

pp. 814-820 ◽

Cited By ~ 53

Author(s):

Carsten Matz ◽

Klaus Jürgens

Keyword(s):

Cell Surface ◽

Surface Charge ◽

Food Selection ◽

Cell Surface Hydrophobicity ◽

Surface Hydrophobicity ◽

Common Species ◽

Electrostatic Charge ◽

Heterotrophic Nanoflagellates ◽

Feeding Rates ◽

Protozoan Grazing

ABSTRACT The influence of cell surface hydrophobicity and electrostatic charge of bacteria on grazing rates of three common species of interception-feeding nanoflagellates was examined. The hydrophobicity of bacteria isolated from freshwater plankton was assessed by using two different methods (bacterial adhesion to hydrocarbon and hydrophobic interaction chromatography). The electrostatic charge of the cell surface (measured as zeta potential) was analyzed by microelectrophoresis. Bacterial ingestion rates were determined by enumerating bacteria in food vacuoles by immunofluorescence labelling via strain-specific antibodies. Feeding rates varied about twofold for each flagellate species but showed no significant dependence on prey hydrophobicity or surface charge. Further evidence was provided by an experiment involving flagellate grazing on complex bacterial communities in a two-stage continuous culture system. The hydrophobicity values of bacteria that survived protozoan grazing were variable, but the bacteria did not tend to become more hydrophilic. We concluded that variability in bacterial cell hydrophobicity and variability in surface charge do not severely affect uptake rates of suspended bacteria or food selection by interception-feeding flagellates.

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Nanoscale topography, surface charge variation and defect correlation in 2–8 nm thick functional alumina films

Applied Surface Science ◽

10.1016/j.apsusc.2020.146950 ◽

2020 ◽

Vol 528 ◽

pp. 146950

Author(s):

Luke Guinane ◽

Devendraprakash Gautam ◽

Jan Kubik ◽

Bernard Stenson ◽

Shane Geary ◽

...

Keyword(s):

Surface Charge ◽

Alumina Films ◽

Charge Variation ◽

Nanoscale Topography

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Surface Potential/Charge Sensing Techniques and Applications

Sensors ◽

10.3390/s20061690 ◽

2020 ◽

Vol 20 (6) ◽

pp. 1690

Author(s):

Songyue Chen ◽

Hepeng Dong ◽

Jing Yang

Keyword(s):

Surface Charge ◽

Surface Potential ◽

Metal Ion ◽

Optimization Methods ◽

Kelvin Probe ◽

Comprehensive Overview ◽

Charge Sensing ◽

Force Microscopy ◽

Wide Range ◽

Detection Technologies

Surface potential and surface charge sensing techniques have attracted a wide range of research interest in recent decades. With the development and optimization of detection technologies, especially nanosensors, new mechanisms and techniques are emerging. This review discusses various surface potential sensing techniques, including Kelvin probe force microscopy and chemical field-effect transistor sensors for surface potential sensing, nanopore sensors for surface charge sensing, zeta potentiometer and optical detection technologies for zeta potential detection, for applications in material property, metal ion and molecule studies. The mechanisms and optimization methods for each method are discussed and summarized, with the aim of providing a comprehensive overview of different techniques and experimental guidance for applications in surface potential-based detection.

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Electrostatic charge sensing using nanocavity-based Raman silicon laser

Light-Emitting Devices, Materials, and Applications XXV ◽

10.1117/12.2577487 ◽

2021 ◽

Author(s):

Satoshi Yasuda ◽

Yuki Takahashi ◽

Takashi Asano ◽

Susumu Noda ◽

Yasushi Takahashi

Keyword(s):

Electrostatic Charge ◽

Charge Sensing ◽

Silicon Laser

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Studies on Adhesive Wear Characteristics of Centrifugally Cast Functionally Graded Ceramic Reinforced Composite

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.4.2020.05.0625 ◽

2020 ◽

Vol 17 (4) ◽

Author(s):

K. Kartik Sriram ◽

N. Radhika ◽

Manu Sam ◽

Shrihari S

Keyword(s):

Adhesive Wear ◽

Centrifugal Casting ◽

Longitudinal Axis ◽

Functionally Graded ◽

Dry Sliding Wear ◽

Sliding Velocity ◽

Cross Sectional ◽

Centrifugally Cast ◽

Pin On Disc ◽

Sliding Distance

Functionally graded material containing LM13 aluminium alloy as matrix and alumina as reinforcement (10 wt. %) was fabricated (Φout150 × Φin90 × 100 mm) by centrifugal casting. Samples were machined from the cylindrical cast along its longitudinal axis. Variation in hardness along the radial cross-sectional wall revealed 33.7% improvement at the outer periphery due to higher presence of alumina. This zone was preferred for dry sliding wear experiments, designed based on Taguchi L27 orthogonal array by varying the process parameters like sliding velocity, sliding distance and load using pin-on-disc tribometer. Analysis of variance revealed velocity as most influential wear factor, next to load. An optimal condition to minimise adhesive wear was determined at a load of 15 N, sliding velocity of 3.5 m/s and sliding distance of 1250 m. Scanning electron microscope analysis on abraded surfaces showed formation of tribolayer at high velocities and delamination at high loads.

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