A5057907706- Planetary Science and Exploration
- Astro and Planetary Science
- Nuclear Physics and Applications
- Bone Tissue Engineering Materials
- Ion-surface interactions and analysis
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Orthopaedic implants and arthroplasty
- Fusion materials and technologies
- Advanced Cellulose Research Studies
- Geological and Geochemical Analysis
- Glass properties and applications
- Graphene and Nanomaterials Applications
- Laser-induced spectroscopy and plasma
- Nanocluster Synthesis and Applications
- Latin American and Latino Studies
- Cultural and Social Studies in Latin America
- Electron and X-Ray Spectroscopy Techniques
- Atomic and Subatomic Physics Research
- Silk-based biomaterials and applications
- Electrospun Nanofibers in Biomedical Applications
- Nuclear Materials and Properties
- Plant tissue culture and regeneration
- Biofield Effects and Biophysics
- Advanced Nanomaterials in Catalysis
Pennsylvania State University
2020-2024
University of Illinois Urbana-Champaign
2019-2023
Oak Ridge National Laboratory
2021
University of Tennessee at Knoxville
2021
Urbana University
2019
Plasma (Russia)
2019
Samples of the carbonaceous asteroid Ryugu were brought to Earth by Hayabusa2 spacecraft. We analyzed 17 samples measuring 1 8 millimeters. Carbon dioxide-bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu's parent formed in outer Solar System. The contain low abundances materials at high temperatures, such as chondrules and calcium- aluminum-rich inclusions. rich phyllosilicates carbonates, which through aqueous alteration reactions temperature, pH,...
Lipase mediated biodegradation of carbon dots in the presence H<sub>2</sub>O<sub>2</sub> follows a sequential oxidation pathway.
The carbonaceous asteroid Ryugu has been explored by the Hayabusa2 spacecraft to elucidate actual nature of hydrous asteroids. Laboratory analyses revealed that samples from are comparable unheated CI chondrites; however, reflectance spectra and CIs do not coincide. Here, we demonstrate sample reproduced heating Orgueil chondrite at 300°C under reducing conditions, which caused dehydration terrestrial weathering products reduction iron in phyllosilicates. Terrestrial accounts for spectral...
Stress shielding and osseointegration are two main challenges in bone regeneration, which have been targeted successfully by chemical physical surface modification methods. Direct irradiation synthesis (DIS) is an energetic ion method that generates self-organized nanopatterns conformal to the of materials with complex geometries (e.g., pores on a material surface). This work exposes porous titanium samples argon ions generating nanopatterning between inside pores. The unique architected...
To address implant-related infections, antibacterial solutions specific to biomaterials are required prevent bacterial proliferation. Traditional antibiotic usage has been found insufficient, motivating researchers investigate alternative strategies such as surface modification and the application of antifouling or infection-resistant properties. A developing interest lies in designing surfaces that mimic natural nanotopographies. In this study, we conducted a quantitative analysis outcomes...
The Ion-Gas-Neutral Interactions with Surfaces-2 (IGNIS-2) surface science facility has been designed at the Pennsylvania State University specific purpose of enabling experiments to study plasma–material interactions. This in situ modification and characterization consists multiple reconfigurable substations that are connected through a central transfer chamber. fully vacuum system ensures physical chemical properties samples not altered between analysis. techniques IGNIS-2 include...
Hydrogels provide a solution-mimicking environment for the interaction with living systems that make them desirable various biomedical and technological applications. Because relevant biological processes in tissues occur at biomolecular scale, hydrogel nanopatterning can be leveraged to attain enhanced material properties functionalities. However, fabrication of high aspect ratio (HAR) nanostructures hydrogels capable self-standing aqueous environments fine control size shape distribution...
Periodic surface structures at the nanometer or micrometer scale have been achieved by various methods, while atomic-scale over large areas are unavailable. Herein, we report formation of highly coherent ripple patterns on bulk metallic glass (MG) surfaces low-energy ion irradiation. The pattern arises through three consecutive stages: emergence initial random dots, subsequent transition to ripples, and ordering annihilation reactions mobile defects, wavelength amplitude remain invariant...
In spite of the biocompatible, nontoxic, and radiolucent properties polyetheretherketone (PEEK), its biologically inert surface compromises use in dental, orthopedic, spine fusion industries. Many efforts have been made to improve biological performance PEEK implants, from bioactive coatings composites using titanium alloys or hydroxyapatite changing by chemical physical methods. Directed plasma nanosynthesis (DPNS) is an atomic-scale nanomanufacturing technique that changes topography...
Amorphous selenium is one of the best photoconductors with a wide range applications, from its early use in photocopy industry to present application X-ray imaging. Low melting point and high vapor pressure amorphous enable uniform economical deposition this photoconductive material up few millimeters thick. However, there tradeoff between rate film uniformity. In article, thermal evaporation system for was developed. The geometry simulated determine optimized source-substrate throw distance...
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device being used in source research and development (R&D) for the proposed MPEX. Once R&D completed, this can also be to perform plasma–material interaction studies. To these studies, new materials analysis particle probe (MAPP) has been constructed. MAPP’s components are sample holder manipulator custom vacuum chamber with ports facilitate surface chemistry diagnostics. overall design enables rapid...
Abstract Bombardment by solar wind ions is one of the main drivers space weathering on airless bodies. Here, we simulate solar-wind-driven spectral alteration loosely packed olivine powders irradiation with 1.2 keV helium (He + ). We measured reflectance spectra powder in ultraviolet–visible–near-infrared (UV–Vis–NIR) wavelength range (0.2–2 μ m) as a function ion fluence. In Vis–NIR range, observed darkening, absorption band shallowing, and reddening, agreement lunar-style previous...
Abstract: Virginia Leyva, a prominent voice in contemporary Mexican literature, addresses the socio-ecological crises of her homeland through blend colloquial and surreal imagery. Her poetry portrays world teetering on edge collapse, reflecting themes destruction, identity, resilience. This introduction to work English highlights challenges translating Leyva’s deeply cultural politically charged language. Through collaborative process, translators Camilo Jaramillo Julie Ann Ward grapple with...
The diagnosis of plasma-facing components in a fusion environment is challenging due to the limited number measurement techniques that have been developed for situ surface analysis. In this work, we assess feasibility using neutron reflectometry (NR) deuterium accumulation tungsten and dispersion-strengthened alloys. TRIM used simulate implantation at different energies approximate depth profiles these materials order calculate expected measurements from NR various fluences. Our results...
&lt;p&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; The Toolbox for Research and Exploration (TREX) is a NASA SSERVI (Solar System Virtual Institute) node. TREX (trex.psi.edu) aims to develop tools research methods the exploration of airless bodies, specifically Moon, Martian moons, near-Earth asteroids. studies are organized into four Themes: (1) Laboratory studies, (2) Lunar (3) Small bodies (4) Field work. work presented here part Theme 3: Investigations...