Katherine Villa

ORCID: 0000-0003-1917-0299
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About
Contact & Profiles
Research Areas
  • Micro and Nano Robotics
  • Molecular Communication and Nanonetworks
  • Advanced Photocatalysis Techniques
  • Pickering emulsions and particle stabilization
  • Catalytic Processes in Materials Science
  • Modular Robots and Swarm Intelligence
  • TiO2 Photocatalysis and Solar Cells
  • Orbital Angular Momentum in Optics
  • Electrohydrodynamics and Fluid Dynamics
  • Catalysis and Oxidation Reactions
  • Microfluidic and Bio-sensing Technologies
  • Luminescence and Fluorescent Materials
  • Copper-based nanomaterials and applications
  • Covalent Organic Framework Applications
  • Gas Sensing Nanomaterials and Sensors
  • Nanoplatforms for cancer theranostics
  • Advanced Nanomaterials in Catalysis
  • Ammonia Synthesis and Nitrogen Reduction
  • Advanced biosensing and bioanalysis techniques
  • Solar-Powered Water Purification Methods
  • Photoreceptor and optogenetics research
  • Water Quality Monitoring and Analysis
  • Characterization and Applications of Magnetic Nanoparticles
  • Molecular Junctions and Nanostructures
  • Tribology and Wear Analysis

Institut Català d'Investigació Química
2021-2025

Barcelona Institute for Science and Technology
2018-2024

Shanghai Institute for Science of Science
2018-2024

University of Chemistry and Technology, Prague
2018-2022

Institute of Science and Technology
2018

Institute for Bioengineering of Catalonia
2017-2018

FC Barcelona
2018

Institut de Recerca en Energia de Catalunya
2014-2017

Universitat Autònoma de Barcelona
2011-2016

University of Quindío
2008-2010

The quest to provide clean water the entire population has led a tremendous boost in development of environmental nanotechnology. Toward this end, micro/nanomotors are emerging as attractive tools improve removal various pollutants. either designed with functional materials their structure or modified target active motion these motors improves mixing and mass transfer, greatly enhancing rate remediation processes. Their can also be used an indicator presence pollutant for sensing purposes....

10.1021/jacs.8b05762 article EN Journal of the American Chemical Society 2018-07-03

An overview of the advantages and challenges photocatalytic water splitting is provided to encourage new research directions mainly on data reproducibility photocatalyst scalability.

10.1039/d1se00808k article EN Sustainable Energy & Fuels 2021-01-01

ConspectusPhotocatalytic materials are gaining popularity and research investment for developing light-driven micromotors. While most of the early work used highly stable TiO2 as a material to construct micromotors, mostly in combination with noble metals, other semiconductors offer wider range properties, including independence from high-energy UV light. This review focuses on our BiVO4 which has shown promise due its small band gap resulting ability absorb blue Additionally, this salt's...

10.1021/accountsmr.3c00021 article EN cc-by Accounts of Materials Research 2024-03-15

Light-driven micro/nanomotors represent the next generation of automotive devices that can be easily actuated and controlled by using an external light source. As field evolves, there is a need for developing more sophisticated micromachines fulfill diverse tasks in complex environments. Herein, we introduce single-component BiVO4 micromotors with well-defined micro/nanostructures swim both individually as collectively assembled entities under visible-light irradiation. These perform cargo...

10.1021/acsnano.9b03184 article EN ACS Nano 2019-07-08

Bismuth-based photocatalysts, Bi2WO6, BiVO4, and coupled Bi2WO6/TiO2–P25, have been synthesized by a facile hydrothermal method, characterized, evaluated for the first time selective photooxidation of methane to methanol. Several conditions were used in order better comprehend reaction mechanism. The obtained BiVO4 is, among others, most promising photocatalyst this reaction, displaying higher CH3OH selectivity being more stable than others. When Bi2WO6 was with TiO2, conversion increased;...

10.1021/cs500821r article EN ACS Catalysis 2014-07-28

Water contamination from industrial and anthropogenic activities is nowadays a major issue in many countries worldwide. To address this problem, efficient water treatment technologies are required. Recent efforts have focused on the development of self-propelled micromotors that provide enhanced micromixing mass transfer by transportation reactive species, resulting higher decontamination rates. However, real application these still limited due to high cost associated their fabrication...

10.1021/acsami.8b04353 article EN ACS Applied Materials & Interfaces 2018-05-30

Abstract Autonomous self‐propelled micromachines, taking energy from surrounding environment and converting it to their motion, are on the forefront of research for smart materials in recent years. Owing self‐propulsion mechanism, they have demonstrated be more efficient drug carriers than passive particles. Here, multifunctional superparamagnetic/catalytic microrobots (PM/Pt microrobots) cell manipulation, anticancer loading, delivery breast cancer cells presented. These PM/Pt fabricated...

10.1002/adfm.201804343 article EN Advanced Functional Materials 2018-09-06

Photoactivated micromachines are at the forefront of micro- and nanomotors field, as light is main power source many biological systems. Currently, this rapidly developing field based on metal-containing segments, typically TiO2 precious metals. Herein, we present metal-free tubular micromotors solely graphitic carbon nitride, highly scalable low-cost that can be actuated by turning on/off source. These able to move a photocatalytic-induced bubble-propelled mechanism under visible...

10.1021/acsnano.8b06914 article EN ACS Nano 2018-11-29

Abstract The first models of mesoporous ZnO/Pt Janus micromotors that show fuel‐free and light‐powered propulsion depending on the interface roughness are shown. Two ZnO semiconducting particles with distinct surface morphologies pore structures synthesized by self‐aggregation primary nanoparticles nanosheets into nanoscale rough smooth microparticles, respectively. self‐assembled nanosheet model (smooth) provides a large for formation continuous Pt layer strong adherence, whereas...

10.1002/adfm.201808678 article EN Advanced Functional Materials 2019-04-02

The selective oxidation of methane to methanol is achieved by means a photocatalytic process. For this purpose, designed Bi- and V-containing beta zeolites prepared incipient wetness impregnation have been used under different test conditions. While the zeolite proves be photoactive UVC irradiation toward total process, formation V2O5 on surface an effective alternative for modifying acid–base properties, thus significantly decreasing undesired CO2 formation. At same time framework serves as...

10.1021/acscatal.6b03535 article EN ACS Catalysis 2017-03-17

Abstract Urinary‐based infections affect millions of people worldwide. Such bacterial are mainly caused by Escherichia coli (E. coli) biofilm formation in the bladder and/or urinary catheters. Herein, authors present a hybrid enzyme/photocatalytic microrobot, based on urease‐immobilized TiO 2 /CdS nanotube bundles, that can swim urea as biocompatible fuel and respond to visible light. Upon illumination for h, these microrobots able remove almost 90% biofilm, due generation reactive radicals,...

10.1002/smll.202106612 article EN cc-by-nc Small 2022-02-05

Nitrite ions are shown to significantly improve the selectivity of photocatalytic oxidation methane methanol.

10.1039/c5cc00978b article EN Chemical Communications 2015-01-01

Self-motile mesoporous ZnO/Pt-based Janus micromotors accelerated by bubble propulsion that provide efficient removal of explosives and dye pollutants via photodegradation under visible light are presented. Decomposition H2O2 (the fuel) is triggered a platinum catalytic layer asymmetrically deposited on the nanosheets hierarchical ZnO microparticles. The size-dependent motion behavior studied; with average size ∼1.5 μm exhibit enhanced self-diffusiophoretic motion, whereas fast detected for...

10.1021/acsami.8b16217 article EN ACS Applied Materials & Interfaces 2018-11-30

Mouths offer the perfect environments for microbial cell formation, promoting growth of biofilms, example, on teeth. Dental biofilm exhibits strong resistance to antibiotics and is a cause many dental diseases. Common strategies removal involve addition high concentrations hydrogen peroxide (H2O2), which increases tooth sensitivity, or mechanical procedures. Here, we report different approach based self-propelled micromachines with antibacterial activity degradation biofilm. Such microrobots...

10.1016/j.xcrp.2020.100181 article EN cc-by-nc-nd Cell Reports Physical Science 2020-09-01

Abstract The increasing demand for disposable textiles multi‐cleansing purposes has led to an uncontrollable accumulation of macro‐ and microdebris in water bodies, resulting major environmental disruptions a threat ecosystems. Considering the emerging nature this type contamination, there is still no current treatment tackle problem. Here, self‐propelled bismuth tungstate microrobots that can actively move under light irradiation, swarm, destroy through oxidative pathways are presented....

10.1002/adfm.202007073 article EN Advanced Functional Materials 2020-09-18

Abstract Photosensitive micromotors that can be remotely controlled by visible light irradiation demonstrate great potential in biomedical and environmental applications. To date, a vast number of light‐driven are mainly composed from costly heavy precious metal‐containing multicomponent systems, limit the modularity chemical physical properties these materials. Herein, highly efficient photocatalytic based exclusively on purely organic polymer framework—semiconducting sulfur‐...

10.1002/adfm.202002701 article EN Advanced Functional Materials 2020-07-23

This frontier review discusses the capabilities of self-propelled micro/nanomotors for removal oil and plastic-based pollutants in water, including future research directions overcoming remaining challenges.

10.1039/d1en00663k article EN Environmental Science Nano 2021-01-01

Since their discovery in 2004, there has been remarkable progress research on nanomotors starting with the elucidation of different propulsion mechanisms to study collective behavior, culminating investigations into applications biomedicine and environmental remediation. This perspective reviews this evolution discusses key challenges ahead, including development advanced characterization techniques, precise motion control, materials innovation, theory modelling, vivo applications. These not...

10.26434/chemrxiv-2025-lczw9 preprint EN cc-by 2025-02-18
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