A5089962463- Minerals Flotation and Separation Techniques
- Force Microscopy Techniques and Applications
- Semiconductor materials and devices
- Polymer Surface Interaction Studies
- Characterization and Applications of Magnetic Nanoparticles
- Electrostatics and Colloid Interactions
- Advanced Surface Polishing Techniques
- Fluid Dynamics and Mixing
- Adhesion, Friction, and Surface Interactions
- Metal and Thin Film Mechanics
- Surfactants and Colloidal Systems
- Analytical Chemistry and Sensors
- Copper Interconnects and Reliability
- Mineral Processing and Grinding
- Spectroscopy and Quantum Chemical Studies
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Surface Roughness and Optical Measurements
- Geophysical and Geoelectrical Methods
- Metallurgical Processes and Thermodynamics
- Molecular Junctions and Nanostructures
- Integrated Circuits and Semiconductor Failure Analysis
- Particle Dynamics in Fluid Flows
- Mechanical and Optical Resonators
- Surface Modification and Superhydrophobicity
Association of Research Libraries
2023
SUNY Polytechnic Institute
2016-2021
Cabot Microelectronics (United States)
2014
University of Utah
2000-2011
IBM (United States)
2010
Michigan Technological University
2003-2007
Central South University
2003-2004
Gdańsk University of Technology
2003
Max Planck Society
2003
Max Planck Institute for Polymer Research
2003
Abstract The electrokinetic features and interfacial water structure, as revealed from molecular dynamics simulations (MDS) are considered with respect to the anisotropic of selected two layer silicate minerals. Planar structures kaolinite antigorite compared the, compositionally equivalent, tubular halloysite chrysotile pH dependency zeta potential determined electrophoretic mobility measurements. importance atomic mismatch between tetrahedral octahedral sheets in a particular bilayer is...
Adhesion between oily contaminants and soil particles is a key factor controlling oil release during decontamination using wet separation processes. Previous research reports showed that hydration of the components, mainly silica particles, governs efficiency. In this work, adhesion force polyethylene surfaces with different degrees obtained by thermal treatment silanation was measured in an aqueous environment atomic microscopy colloidal probe technique. The increases significantly...
Interaction forces between a fluorite (CaF2) surface and colloidal silica were measured by atomic force microscopy (AFM) in 1 x 10(-3) M NaNO3 at different pH values. Forces the colloid flat range of values above isoelectric point (IEP) so that mainly controlled charge. In this way, IEP was deduced from AFM curves approximately 9.2. Experimental versus separation distance good agreement with theoretical predictions based on long-range electrostatic interactions, allowing potential to be...
Spherical particles of calcium dioleate were successfully prepared to measure the interaction force a collector colloid at calcite and fluorite surfaces. Scanning electron microscopy (SEM), atomic (AFM), Fourier transform infrared (FTIR) spectroscopy, electrophoretic mobility measurements used characterize specially spheres. FTIR spectra show that spheres have same spectral properties as untreated (freshly precipitated) dioleate. SEM imaging sphere surface AFM roughness indicate these can be...
AbstractA study of the interfacial properties basal plane and edge surfaces talc is described in this paper. The isoelectric points measured at two different crystallographic by streaming potential method were found to be similar exist about pH 3.0. In case surface, zeta increases higher values which can attributed hydration surface magnesium ions. forces between a 20 μm particle various using atomic force microscopy (AFM). These measurements show differences talc. Finally, are revealed from...
Abstract The adhesional contact between a particle and substrate is fundamental parameter for analyzing pull-off force data generated by atomic microscopy (AFM). Roughness, present at some scale all real materials, complicates this task introducing asperity-controlled contact. Roughness also causes scatter, well-known phenomenon that usually neglected in analysis of the AFM results. This paper presents first systematic study roughness effect on magnitude its distribution characteristics....
The interactions of air bubbles and oil droplets in centrifugal flotation have been considered with respect to process conditions present during Air-sparged Hydrocyclone (ASH) flotation. Encounter efficiency has found be significantly smaller when compared encounter mineral particles. Collision sliding contact times determined. insufficient for successful between while allows film rupture depending on specific system conditions. Although the tenacity droplet attachment an bubble is believed...
Sum frequency vibrational spectroscopy (SFVS) spectra indicate that a very ordered water structure exists in the stable film at hydrophilic silica surface during contact with bubble and extent of hydrogen bonding increases an increase pressure. In contrast, SFVS hydrophobic show lack are characterized by distinct absorption about 3700 cm −1 , similar to spectrum air/water interface. These results suggest presence exclusion zone surface, as supported X-ray reflectivity measurements reported...
We report on the development of a chemical mechanical planarization (CMP) process for thick damascene Ta structures with pattern feature sizes down to 100 nm. This CMP is core fabrication sequence scalable superconducting integrated circuits at 300 mm wafer scale. work has established elements various CMP-related design rules that can be followed by designer layout include Ta-based coplanar waveguide resonators, capacitors, and interconnects tantalum-based qubits single flux quantum...
A major roadblock to scalable quantum computing is phase decoherence and energy relaxation caused by qubits interacting with defect-related two-level systems (TLS). Native oxides present on the surfaces of superconducting metals used in devices are acknowledged be a source TLS that decrease qubit coherence times. Reducing microwave loss surface engineering (i.e., replacing uncontrolled native oxide thin, stable predictable characteristics) can key enabler for pushing performance forward...
Recently, substantial research effort has been devoted to the study of non-DLVO forces between hydrophobic surfaces. However, significance surface roughness in analysis these attractive not given sufficient consideration and is now progress attend this issue. Fused silica plates covered with adsorbed octadecyltrichlorosilane (OTS) were characterized by water contact angle measurements atomic force microscopy (AFM). Surfaces different coverages angles obtained variation adsorption time. OTS...
The atomic force microscopy (AFM) colloidal probe technique was used to study the effect of oxyethylene dodecyl ethers, C12En (n = 1−7), on interactions between hydrophobic polyethylene (PE) surfaces in aqueous solutions. Long-range (colloidal) and contact (pull-off) forces were measured 10 20 μm PE spheres a flat surface at concentrations surfactant 1 × 10-6 10-4 M. tension solutions angles also studied. influence number groups molecule examined. Initially, long-range attractive...
A novel procedure for the preparation of hydrophobic spherical particles from thermoplastic materials, such as polyethylene (PE) or fossil resin (FR), is presented. These are particularly useful in determination surface forces with atomic force microscope using colloidal probe technique. The steps include (i) suspending powdered polymer (PE and FR) glycerol, (ii) heating suspension above melting point polymer, (iii) solidification dispersed PE/FR droplets at a reduced temperature, (iv)...
Interaction force measurements were performed for a silica−silica hydrophilic system and silanated silica−silanated silica hydrophobic using the atomic microscopy colloidal probe technique. The influence of solution composition on interaction forces was investigated. interactions found to be described as typical Derjaguin−Landau−Verwey−Overbeek (DLVO) in solutions various compositions, whereas dominated by long-range force. An increase isopropyl alcohol content diminishes both repulsive case...
Fourier transform infrared transmission (FTIR/TS), external reflection (FTIR/ERS), and internal (FTIR/IRS) spectroscopies are three important sampling techniques for the study of adsorbed surfactants. The optical spectral characteristics a three-phase system were calculated using theoretical simulation discussed based on experimental results oleate adsorption at air/water interface water/fluorite interface. It is shown that thorough understanding properties from FTIR analysis helps to...