A5029792520- Photovoltaic System Optimization Techniques
- Photovoltaic Systems and Sustainability
- Silicon and Solar Cell Technologies
- High-Temperature Coating Behaviors
- solar cell performance optimization
- Advanced Battery Technologies Research
- Electronic Packaging and Soldering Technologies
- Graphene research and applications
- Adhesion, Friction, and Surface Interactions
- Solar Radiation and Photovoltaics
- Advanced MEMS and NEMS Technologies
- Force Microscopy Techniques and Applications
- Surface Modification and Superhydrophobicity
- Aluminum Alloys Composites Properties
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- nanoparticles nucleation surface interactions
- Gut microbiota and health
- Mechanical stress and fatigue analysis
- Surface and Thin Film Phenomena
- Nanocluster Synthesis and Applications
- Tribology and Wear Analysis
- Mechanical Behavior of Composites
- Advanced Materials and Mechanics
- Escherichia coli research studies
- Integrated Circuits and Semiconductor Failure Analysis
Northeastern University
2009-2024
Universidad del Noreste
2019-2021
Boston University
2020
Boston Engineering (United States)
2020
Arkema (United States)
2017
National Institute of Standards and Technology
2017
National Renewable Energy Laboratory
2017
Case Western Reserve University
2017
Université Clermont Auvergne
2003
Summary Background : Pathogenic adherent–invasive Escherichia coli have been isolated from ileal lesions of Crohn's disease. Aim To investigate the non‐pathogenic E. strain Nissle 1917 (Mutaflor) as possible maintenance therapy in inflammatory bowel disease by testing its ability to prevent strains adhering and invading human intestinal epithelial cells vitro . Methods Bacterial adhesion invasion (Intestine‐407) were assessed counting colony‐forming units. The inhibitory effect was...
Abstract A circular membrane clamped at the periphery is allowed to adhere or delaminate from a planar surface of cylindrical punch in presence intersurface forces with finite range and magnitude. Assuming uniform disjoining pressure within cohesive zone delamination front, adhesion-delamination mechanics obtained by thermodynamic energy balance. Interrelations between instantaneous applied load, displacement, contact circle, resulting critical thresholds “pinch-off,” “pull-off,” “pull-in”...
Abstract We describe and analyze in detail the shapes of Fe islands encapsulated under top graphene layers graphite. Shapes are interrogated using scanning tunneling microscopy. The main outputs shape analysis slope membrane around perimeter island, aspect ratio central metal cluster. Modeling primarily uses a continuum elasticity (CE) model. As input to CE model, we use density functional theory calculate surface energy Fe, adhesion energies between or shaft-loaded blister test (SLBT) model...
Shapes of functional metallic nanocrystals, typically synthesized either free in solution or supported on surfaces, are key for controlling properties. Here, we consider a novel new class copper clusters embedded near the surface graphite, which can be considered model system metals beneath surfaces layered materials, membranes. We develop continuum elasticity (CE) equilibrium shape these islands, and compare its predictions with experimental data. The CE incorporates appropriate energy,...
The selection of polymeric materials utilized in photovoltaic (PV) modules has changed relatively little since the inception PV industry, with ethylene-vinyl acetate (EVA), polyethylene terephthalate (PET), and fluoropolymer-based laminates being most widely adopted primary components encapsulant backsheet materials. must serve to electrically insulate solar cells protect them from effects weathering. Due continued downward pressure on cost, other are formulated withstand outdoor exposure...
Photovoltaic (PV) module backsheets degrade at different rates because of the specific polymeric materials and local exposure environments installations. Studies real-world backsheet degradation provide valuable information to understand failure. Field surveys PV were conducted on 1310 modules in four commercial power plant sites with times. The backsheet's environment is determined by its location along rack length depth, modules' elevation above ground, ground cover albedo. Backsheets that...
The width tapered beam method for measuring fracture toughness has been contemplated use in the adhesion of photovoltaic materials, is promoted by it being a viable directly on modules rather than to engineered test specimens. However, precise determination crack length often difficult as failure involves tendril formation, cavitation voids, and other plastic deformation at front addition obfuscation opaque materials. Because energy varies square length, imprecise tip results large...
An analytical model is derived for the delamination of a thin film from rigid substrate by cylindrical shaft with flat end and finite radius. We show that, within certain limitations, point-load can be applied to system, give simple relations between film-substrate energy adhesion measured variables force, blister height, The results are applicable systems where size or disk generates substrate.
Backsheet exposure conditions and degradation are shown to vary significantly within an array. This is demonstrated by a survey of the NIST ground-mounted photovoltaic array, which comprised over 1000 modules with polyester-based backsheet. Site array design factors found have significant effects on conditions, thus backsheets. Backside irradiance be most factor varies
Backsheet degradation is key to maintaining the lifetime of photovoltaic (PV) modules. Cracking, delamination, bubbling, and discoloration are main types degradation. PV modules were collected from installations in multiple climatic zones. Multiple backsheets obtained with poly(ethylene teraphlate) (PET) polyamide air side layers being largest number retrieved. commercial exposed accelerated exposures mechanisms identified. Polyamide showed cracking retrieved under exposures. Poly(vinylidene...
Degradation of polymeric backsheets is a result accumulated synergetic effects kinds environmental stresses. In this study, degradation the optical properties 16 commercial photovoltaic module exposed in 5 different climatic zones was investigated. addition to yellowness index and gloss measurement, Fourier transform infrared spectroscopy conducted on outer layer PV backsheet study chemical changes during exposure. Several simple linear regression models as function factors were developed...
Polyamide (PA)-based backsheet as an emerging product has been developed in recent years to partially substitute fluoropolymer materials under the intensified cost-reduction pressure. However, a number of reports indicate that cracks have observed fielded modules few locations after only exposure. An in-depth analysis on degradation and crack formation their dependence climatic conditions is needed. In this work, field PV with PA-based five different up six were retrieved analyzed, including...
Performance of a photovoltaic (PV) module is related to the micro-environment around module. The position modules in an array row have large effect on yellowing and gloss PV backsheet exposed Dfa climatic zone (Gaithersburg, MD) with polyethylene naphthalate (PEN) outer layer. <Stress/ Response< models gloss-losing as function location parameters module, including shed, row, measurement same distance center, are under development. installation height had greatest influence degradation PEN...